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Journal articles on the topic 'Microwave communication systems'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 August 2024

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1

Hunter, I. C., S. R. Chandler, D. Young, and A. Kennerley. "Miniature microwave filters for communication systems." IEEE Transactions on Microwave Theory and Techniques 43, no. 7 (July 1995): 1751–57. http://dx.doi.org/10.1109/22.392949.

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2

Agrawal, Anurag Vijay, and Meenakshi Rawat. "Reliable Integrated Satellite Terrestrial Communications using MIMO for Mitigation of Microwave Absorption by Earths Oxygen." Defence Science Journal 69, no. 5 (September 17, 2019): 458–63. http://dx.doi.org/10.14429/dsj.69.14951.

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Microwaves are used to communicate with satellite and terrestrial communication networks. But as microwaves pass through the Earth’s atmosphere, the oxygen gas absorbs microwave. In this 5G era, when the whole world is moving towards high data-rates and reliable communications, this absorption affects the data transmission in Integrated Satellite/Terrestrial Communication (ISTC) systems, which leads to degradation of the system performance. The multiple-input-multiple-output (MIMO) technology has become a boon for modern wireless communication systems to achieve the necessities of higher data-rates and communication reliability. The paper analyses the MIMO effect on block error rate (BLER), error vector magnitude (EVM) and throughput performance of the data transmission with different MIMO configurations. The paper establishes that better data-rates as well as reliable data communication is achieved with higher order MIMO configurations. MIMO 8×1 provides 5, 20 and 42.5 times improved performance to BLER; 5.26%, 25% and 81.82% in throughput; and 10.34%, 23.07% and 28% in EVM calculations as comparable to MIMO 4×1, MIMO 2×1 and SISO 1×1, respectively at 15 dB signal-to-noise ratio (SNR). The authors also give a new concept of multi-cellular layers based mobile communication network, useful for future smart cities.
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3

Maune, Holger, Matthias Jost, Roland Reese, Ersin Polat, Matthias Nickel, and Rolf Jakoby. "Microwave Liquid Crystal Technology." Crystals 8, no. 9 (September 5, 2018): 355. http://dx.doi.org/10.3390/cryst8090355.

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Tunable Liquid Crystal (LC)-based microwave components are of increasing interest in academia and industry. Based on these components, numerous applications can be targeted such as tunable microwave filters and beam-steering antenna systems. With the commercialization of first LC-steered antennas for Ku-band e.g., by Kymeta and Alcan Systems, LC-based microwave components left early research stages behind. With the introduction of terrestrial 5G communications systems, moving to millimeter-wave communication, these systems can benefit from the unique properties of LC in terms of material quality. In this paper, we show recent developments in millimeter wave phase shifters for antenna arrays. The limits of classical high-performance metallic rectangular waveguides are clearly identified. A new implementation with dielectric waveguides is presented and compared to classic approaches.
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4

Klein, N., M. Winter, and H. R. Yi. "Cryogenic dielectric resonators for future microwave communication systems." Superconductor Science and Technology 13, no. 5 (May 1, 2000): 527–31. http://dx.doi.org/10.1088/0953-2048/13/5/320.

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5

Koigerov, Aleksey S., Pavel A. Turalchuk, Mikhail M. Derkach, and Sergey S. Andreychev. "Passive bandpass filters for modern microwave communication systems." Physics of Wave Processes and Radio Systems 27, no. 1 (March 29, 2024): 71–88. http://dx.doi.org/10.18469/1810-3189.2024.27.1.71-88.

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Background. Bandpass filters are an integral part of any radio engineering systems and modern communication systems. Research and development of new passive components is due to growing need for such elements for modernization and creation of new modern communication systems. Aim. A brief overview of passive bandpass filters. Their classification according to the type of implementation is given. Methods. Results of experimental research and design of different passive bandpass filters are considered. Results. Lumped elements filters, microstrip filters, filters on high-temperature superconductor films, filter on dielectric resonators, surface acoustic wave filters, bulk acoustic wave filters are considered. At a qualitative level, the main advantages and disadvantages are considered from point of view of electrical parameters and size indicators. Examples of topological and constructive implementation are given. Conclusion. The passive bandpass filters considered in the paper make it possible to implement frequency selection devices at operating frequencies up to 6 GHz and higher, taking into account modern system trends and requirements for devices of this type.
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6

Ren, Qingying, Wen Zuo, Jie Xu, Leisheng Jin, Wei Li, and Debo Wang. "Design of a Microwave Power Detection System in the 5G-Communication Frequency Band." Sensors 21, no. 8 (April 10, 2021): 2674. http://dx.doi.org/10.3390/s21082674.

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At present, the proposed microwave power detection systems cannot provide a high dynamic detection range and measurement sensitivity at the same time. Additionally, the frequency band of these detection systems cannot cover the 5G-communication frequency band. In this work, a novel microwave power detection system is proposed to measure the power of the 5G-communication frequency band. The detection system is composed of a signal receiving module, a power detection module and a data processing module. Experiments show that the detection frequency band of this system ranges from 1.4 GHz to 5.3 GHz, the dynamic measurement range is 70 dB, the minimum detection power is −68 dBm, and the sensitivity is 22.3 mV/dBm. Compared with other detection systems, the performance of this detection system in the 5G-communication frequency band is significantly improved. Therefore, this microwave power detection system has certain reference significance and application value in the microwave signal detection of 5G communication systems.
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7

Sanjivani Munot. "Microwave Antenna Optimization for Low Latency and High Throughput Communication Systems." Journal of Electrical Systems 20, no. 6s (May 2, 2024): 2410–16. http://dx.doi.org/10.52783/jes.3223.

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This paper presents a comprehensive exploration of microwave antenna optimization strategies aimed at achieving low latency and high throughput in modern communication systems. With the escalating demand for real-time applications and data-intensive services, the optimization of microwave antennas has become imperative to meet the stringent requirements of responsiveness and efficiency. The abstract delves into various facets of antenna optimization, including design parameters, signal processing techniques, and deployment considerations, all geared towards minimizing latency and maximizing throughput. Through a thorough review of existing literature and practical insights from real-world deployments, this research aims to provide valuable guidance for engineers and researchers in designing and implementing optimized microwave antennas for next-generation communication networks. By examining the intricate interplay between antenna design, signal processing algorithms, and deployment strategies, this paper elucidates the challenges and opportunities in achieving low latency and high throughput in microwave communication systems. Furthermore, it highlights the significance of factors such as gain, beamwidth, polarization, frequency band selection, multiple-input multiple-output (MIMO) systems, beamforming, adaptive coding and modulation (ACM), antenna placement, tower height, and line-of-sight considerations in optimizing antenna performance. The findings presented in this paper contribute to advancing the understanding of microwave antenna optimization and offer practical insights into enhancing the responsiveness, efficiency, and reliability of modern communication networks.
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8

Rajeswari, P., P. Sushmitha, E. Divya, and A. Sherin Jensila. "Design and Implementation of Phase Shifter for Wireless Communication." International Journal for Research in Applied Science and Engineering Technology 10, no. 6 (June 30, 2022): 1512–16. http://dx.doi.org/10.22214/ijraset.2022.44088.

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Abstract: Phase shifters are common microwave devices that are widely used to control the phase of a microwave signal in mobile satellite systems, microwave instrumentation and measurement systems, modulators, noise cancellation systems, frequency converters, electronic beam scanning phase arrays, microwave imaging, and many other industrial applications is used for. Phase shifters are passive devices used to perform variable phase changes in the wave propagating through it. Phase shifters require compact size, low cost and low insertion loss in the desired bandwidth. The size of the phase shifters is a crucial parameter, especially in the design of portable microwave devices, due to the space constraints. The significantly higher insertion loss of phase shifters used in a transmitter causes a significant reduction in transmitting power levels, while it causes a severe drop in signal to noise ratio when the phase shifter is a part of the receiver.. Phase shifters are essential components in phased array antennas for wireless and Radio Detection And Ranging (RADAR) applications. Loaded line phase shifter, reflective line phase shifter and switched line phase shifters are the most commonly used. The electrical performance of a phase shifter is specified in terms of insertion loss, phase error, operating bandwidth and power handling capacity.. Emerging wireless systems have transceivers that require compact and cost effective phase shifters. Physical size and weight of phase shifters are the major issues in mobile and the wireless applications. Therefore, miniaturization of phase shifters has become an important objective of radio frequency (RF) designers to provide portability and affordability in wireless/mobile systems. The present research work mainly focuses on planar phase shifter design with linear phase shift. In this a Defected Ground Structures (DGS) is proposed where as ,Monolithic Microwave Integrated Circuits (MMIC), Micro Electro Mechanical Systems (MEMS) and fractals have emerged as the possible techniques for miniaturization of RF systems and antennas. However the existence of defected cells on the ground plane may limit the use of DGS based phase shifters. MMIC technology increases the cost and complexity of manufacturing whereas MEMS based phase shifter is prone to limited life and yield. In this thesis, fractal techniques are adapted to design and develop miniaturized phase shifters for wireless applications.
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9

Kamo, Bexhet, Shkelzen Cakaj, Vladi Koliçi, and Erida Mulla. "Simulation and Measurements of VSWR for Microwave Communication Systems." International Journal of Communications, Network and System Sciences 05, no. 11 (2012): 767–73. http://dx.doi.org/10.4236/ijcns.2012.511080.

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10

Klein, N., M. Schuster, S. Vitusevich, M. Winter, and H. R. Yi. "Novel dielectric resonator structures for future microwave communication systems." Journal of the European Ceramic Society 21, no. 15 (January 2001): 2687–91. http://dx.doi.org/10.1016/s0955-2219(01)00346-6.

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11

Kaganov, W. I., and F. Ki. "Redistribution of Signals Power in Multipath System of Radio Communication." Russian Technological Journal 7, no. 4 (August 11, 2019): 54–59. http://dx.doi.org/10.32362/2500-316x-2019-7-4-54-59.

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Two types of satellite radio of communication systems are compared: single-beam and multibeam. The problem of summation and redistribution of radio signal powers of communication systems is discussed. The power redistribution of a group of microwave transistor amplifiers between different beams is analyzed. An adder circuit based on bridge quadrature devices is considered in two- and four-ray systems. For two such cases, the scattering matrix of the signal power adder was compiled. On the basis of these two cases it is possible to compose a scattering matrix for the number of summed powers of microwave signals with the number of rays equal to 8, 16 and 32.
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12

Qu, Qianyue, Yuanyu Zhang, and Shoji Kasahara. "Analysis of Eavesdropping Region in Hybrid mmWave-Microwave Wireless Systems." Wireless Communications and Mobile Computing 2023 (September 2, 2023): 1–14. http://dx.doi.org/10.1155/2023/3178335.

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Hybrid communication systems, where millimeter-wave (mmWave) links coexist with microwave links, have been an essential component in the fifth-generation (5G) wireless networks. Nevertheless, the open feature of the wireless medium makes hybrid systems vulnerable to eavesdropping attacks. Eavesdroppers in hybrid communication systems can enhance their attack performance by opportunistically eavesdropping on mmWave or microwave links. This paper, therefore, aims to answer a natural question: in which region do eavesdroppers prefer the mmWave links? To this end, we first formulate this question as an eavesdropping region characterization problem from the physical layer security perspective, where eavesdroppers select the link to eavesdrop based on the ratio between the security performances of the mmWave and microwave links. To model the security performances of both the mmWave and microwave links, we derive closed-form expressions for the secrecy outage probabilities and lower bounds/exact expressions for the secrecy rates of both links. Finally, we provide numerical results to validate our theoretical analysis and also illustrate the mmWave eavesdropping region under various network parameter settings.
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13

Mikhail E. Belkin, Vladislav Golovin, Yuriy Tyschuk, and Alexander S. Sigov. "Computer-aided design for analog wireless fronthaul of B5G cellular communication systems." ITU Journal on Future and Evolving Technologies 2, no. 2 (June 14, 2021): 35–46. http://dx.doi.org/10.52953/uzpn8246.

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Specialties of an analog fronthaul based on Radio-over-Fiber architecture and key principles of exploiting microwave photonics technology when designing a millimeter-wave Radio Unit (RU) are reviewed and discussed. To clarify, in this paper we perform a comparative simulation for a specific example of developing an obligatory RU's node as a reference oscillator with an output radio frequency (RF) of more than 100 GHz, which is typically implemented by means of a circuit that includes a relatively low-frequency RF oscillator followed by a high-order frequency multiplier. Following the principles and approaches outlined, we propose and describe two alternative schemes for implementing a frequency multiplier from 4.25 to 102 GHz using microwave-electronics or microwave-photonics approach. Further, using Cadence AWRDE software with an additional introduction of the previously proposed models of optoelectronic devices, their main characteristics are considered. To ensure the practical orientation of the model experiments, the parameters of each of the models used are selected based on the specifications of commercially available discrete components.
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14

Yoshida, Satoshi, Takumasa Noji, Goh Fukuda, Yuta Kobayashi, and Shigeo Kawasaki. "Experimental Demonstration of Coexistence of Microwave Wireless Communication and Power Transfer Technologies for Battery-Free Sensor Network Systems." International Journal of Antennas and Propagation 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/357418.

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This paper describes experimental demonstrations of a wireless power transfer system equipped with a microwave band communication function. Battery charging using the system is described to evaluate the possibility of the coexistence of both wireless power transfer and communication functions in the C-band. A battery-free wireless sensor network system is demonstrated, and a high-power rectifier for the system is also designed and evaluated in the S-band. We have confirmed that microwave wireless power transfer can coexist with communication function.
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15

Li, Xiang Yang, and Zong Feng Ma. "Hybrid Laser/Microwave Wireless Communication System for Fractionated Cluster Spacecraft." Applied Mechanics and Materials 651-653 (September 2014): 2036–39. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.2036.

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Compared with conventional a single, “monolithic” satellite, fractionated cluster spacecraft system has the advantages of enhancing the adaptability and survivability of space systems while also shortening development expense. A novel wireless communication system that combines both microwave and laser technology has been investigated and demonstrated. The experiment results show that the hybrid laser/microwave wireless communication can offer excellent information services and meet the cluster system requirement.
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16

Kanellopoulos, John D., Stelios G. Koukoulas, Nicolaos J. Kolliopoulos, Christos N. Capsalis, and Spyros G. Ventouras. "Rain attenuation problems affecting the performance of microwave communication systems." Annales des Télécommunications 45, no. 7-8 (July 1990): 437–51. http://dx.doi.org/10.1007/bf03000944.

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17

Jia-Sheng Hong, M. J. Lancaster, R. B. Greed, D. Voyce, D. Jedamzik, J. A. Holland, H. J. Chaloupka, and J. C. Mage. "Thin film HTS passive microwave components for advanced communication systems." IEEE Transactions on Appiled Superconductivity 9, no. 2 (June 1999): 3893–96. http://dx.doi.org/10.1109/77.783878.

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18

Cardillo, Emanuele, Renato Cananzi, and Paolo Vita. "Wideband Versatile Receiver for CubeSat Microwave Front-Ends." Sensors 22, no. 22 (November 21, 2022): 9004. http://dx.doi.org/10.3390/s22229004.

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One of the main features of CubeSats is represented by their extreme versatility, e.g., maintaining the same overall structure for different purposes. This requires high technological flexibility achievable in a cost-effective way while maintaining compact sizes. In this contribution, a microwave receiver specifically designed for CubeSat applications is proposed. Due to the wide input operating bandwidth, i.e., 2 GHz–18 GHz, it can be exploited for different purposes, e.g., satellite communication, radars, and electronic warfare systems. This is beneficial for CubeSat systems, whereby the possibility to share the same front-end circuit for different purposes is a key feature in reducing the overall size and weight. The downconverter was designed to minimize the spurious contributions at low frequency by taking advantage, at the same time, of commercial off-the-shelf components due to their cost-effectiveness. The idea behind this work is to add flexibility to the CubeSat communication systems in order to be reusable in different contexts. This feature enables new applications but also provides the largest bandwidth if required from the ground system. An accurate experimental characterization was performed to validate the downconverter performance with the aim of allowing easy system integration for the new frontier of CubeSat technologies. This paves the way for the most effective implementation of the Internet of Things (IoT), machine-to-machine (M2M) communications, and smart-everything services.
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19

Wang, Jingchen, and Wencheng Lai. "Editorial for the Special Issue on Recent Advances in Microwave Components and Devices." Micromachines 15, no. 2 (January 25, 2024): 180. http://dx.doi.org/10.3390/mi15020180.

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20

Olsen, Robert G. "Two-Wire Power Line Microwave Communication Using Low-Loss Modes." Applied Sciences 13, no. 13 (July 4, 2023): 7846. http://dx.doi.org/10.3390/app13137846.

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A closed-form solution for the common and differential modal currents induced on a pair of infinitely long parallel conductors by a source, field coupled to a power line, is derived. For lossy conductors, the current consists of a continuous spectrum of radiation modes and (for the common mode) a modified low-loss Sommerfeld–Goubau (SG) mode and (for the differential mode) a quasi-TEM mode. This model is used to investigate the influence of a parallel conductor on microwave power line communication systems. When the complete current spectrum is used, it is shown that the SG mode is not the primary reason why low-loss communication is possible on power lines for distances on the order of 100 m. Nevertheless, and consistent with previous research, microwave communication using power lines has advantages over free space communication, and for typical parameters, the performance of these systems can be enhanced if the power line contains more than one conductor.
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21

Leeb, Walter R. "Comparison of microwave and light wave communication systems in space applications." Optical Engineering 46, no. 1 (January 1, 2007): 015003. http://dx.doi.org/10.1117/1.2432881.

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22

Young, M. C. S., and P. M. Grant. "Reduction of multipath propagation effects in microwave digital radio communication systems." Electronics & Communications Engineering Journal 2, no. 1 (1990): 4. http://dx.doi.org/10.1049/ecej:19900003.

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23

Nagesh, S. K., D. Revannasiddiah, and S. V. K. Shastry. "Investigation of multipactor breakdown in communication satellite microwave co-axial systems." Pramana 64, no. 1 (January 2005): 95–110. http://dx.doi.org/10.1007/bf02704533.

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24

Xu, Jianchun, Ke Bi, Xiaojun Zhai, Yanan Hao, and Klaus D. Mcdonald-Maier. "A Dual-Band Microwave Filter Design for Modern Wireless Communication Systems." IEEE Access 7 (2019): 98786–91. http://dx.doi.org/10.1109/access.2019.2930688.

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25

Mase, Atsushi. "Special Issue on Development and Applications of Microwave/Millimeter Wave Diagnostics in Industry." Applied Sciences 13, no. 3 (January 31, 2023): 1852. http://dx.doi.org/10.3390/app13031852.

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26

Zhou, Li. "Optical System in Laser Inter-Satellites Communication." Advanced Materials Research 945-949 (June 2014): 2213–16. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.2213.

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We know that Inter-satellites communica-tion is a very important to us.However, real global coverage can only be achieved by satellite systems. Satellites communication is the most important mean of the communication network. The traditional satellites communication and inter-satellites links are built by microwave. Recent years, laser links for inter-satellites communication are becoming more and more important.
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27

Liu, Qidi, and Mable P. Fok. "Ultrafast and Wideband Microwave Photonic Frequency-Hopping Systems: A Review." Applied Sciences 10, no. 2 (January 10, 2020): 521. http://dx.doi.org/10.3390/app10020521.

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The increasing demands to enhance information security in data transmission, providing countermeasures against jamming in military applications, as well as boosting data capacity in mobile and satellite communication, have led to a critical need for high-speed frequency-hopping systems. Conventional electronics-based frequency-hopping systems suffer from low data rate, low hopping speed, and narrow hopping-frequency bandwidth. Unfortunately, those are important aspects to facilitate frequency-hopping in emerging microwave systems. The recent advancement of microwave photonics—the use of light to process microwave signals—provides promising solutions to tackle the challenges faced by electronic frequency-hopping systems. In this paper, the challenges of achieving real-time frequency-hopping systems are examined. The operation principles and results of various microwave photonics-enabled frequency-hopping systems are comprehensively discussed, which have wide hopping-frequency bandwidth and frequency-hopping speed from nanoseconds to tens of picoseconds. Lastly, a bio-inspired jamming-avoidance system that could potentially be used for adaptive frequency-hopping is also introduced.
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28

Zecchi, Silvia, Giovanni Cristoforo, Mattia Bartoli, Alberto Tagliaferro, Daniele Torsello, Carlo Rosso, Marco Boccaccio, and Francesco Acerra. "A Comprehensive Review of Electromagnetic Interference Shielding Composite Materials." Micromachines 15, no. 2 (January 26, 2024): 187. http://dx.doi.org/10.3390/mi15020187.

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The interaction between matter and microwaves assumes critical significance due to the ubiquity of wireless communication technology. The selective shielding of microwaves represents the only way to achieve the control on crucial technological sectors. The implementation of microwave shielding ensures the proper functioning of electronic devices. By preventing electromagnetic pollution, shielding safeguards the integrity and optimal performances of devices, contributing to the reliability and efficiency of technological systems in various sectors and allowing the further step forwards in a safe and secure society. Nevertheless, the microwave shielding research is vast and can be quite hard to approach due to the large number and variety of studies regarding both theory and experiments. In this review, we focused our attention on the comprehensive discussion of the current state of the art of materials used for the production of electromagnetic interference shielding composites, with the aim of providing a solid reference point to explore this research field.
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29

Cardillo, Emanuele, Renato Cananzi, Paolo Vita, and Alina Caddemi. "Dual-Conversion Microwave Down Converter for Nanosatellite Electronic Warfare Systems." Applied Sciences 12, no. 3 (January 30, 2022): 1524. http://dx.doi.org/10.3390/app12031524.

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In this work, a microwave down converter is proposed for nanosatellite electronic warfare applications. It provides high spurious suppression by exploiting a dual-conversion architecture and premium performance in terms of noise figure and linear dynamic range. The system design takes advantage of commercial off-the-shelf components, thus allowing for both fast and cost-effective prototyping, which are key requirements particularly concerning CubeSat systems. Since different military, commercial, radar and communication systems operate in the 2–18 GHz frequency band, the capability to integrate such kinds of receivers in CubeSats represents the new frontier of the electronic warfare systems. Moreover, due to the wide operating bandwidth, it can be successfully exploited as the receiver for different applications, e.g., satellite communication, radars, etc.
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Patel, Arpita, and Aasheesh Shukla. "A review on intelligent reflecting surface-based terahertz communication." Indonesian Journal of Electrical Engineering and Computer Science 25, no. 3 (March 1, 2022): 1580. http://dx.doi.org/10.11591/ijeecs.v25.i3.pp1580-1588.

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<span>Terahertz (THz)-band communications can be considered as the new frontline for future-generation wireless communication systems as it has a wider bandwidth in comparison to microwave and mmwave communications. It also promises to integrate the wide range of diverse applications. Because of high path loss and narrow spreading of THz waves, the transmission is extremely sensitive and signal coverage is a critical problem. To overcome this, an intelligent reflecting surface (IRS), has received great interest which steers the beams of THz waves by regulating the phase shifts to alleviate blockage and improve the coverage capability. In this paper, the role of IRS in conjunction with the THz communication has been discussed. Further, challenges and research directions of IRS for terahertz communication are also discussed.</span>
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31

Yao, Cheng-Kai, Ying-Huan Chen, Yibeltal Chanie Manie, Mekuanint Agegnehu Bitew, and Peng-Chun Peng. "Microwave signal generation with discrete mode laser diode." Laser Physics Letters 19, no. 5 (April 1, 2022): 056201. http://dx.doi.org/10.1088/1612-202x/ac60a4.

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Abstract Microwave signals with low phase noise can be broadly used in communication systems, satellite communications, and radar systems. Discrete mode laser diode (DM-LD) has the capacity to generate signals that meet the above requirements. Moreover, it has the following advantages such as stable operation over a wide temperature range, very high side mode suppression ratio, low sensitivity to optical feedback, and narrow linewidth. In this paper, we proposed and experimentally demonstrated DM-LD for generating the second harmonic signal in the self-starting microwave generation system. The results show that DM-LD effectively reduces the single sideband (SSB) phase noise of the fundamental signals and its second harmonic signals better than the same designed experimental system using a distributed feedback LD, which reduces the SSB noise of the fundamental signal/its second harmonic signal by over 16/22 dB, 18/22 dB, 13/19 dB at a frequency offset of 10 kHz, 100 kHz, and 1 MHz, respectively.
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32

Deng, Ke, Bing Zhong Wang, and Zhou Shi Yao. "Unified Hybrid Free Space Optical/Radio Frequency Communication System Based on Microwave Photonics." Advanced Materials Research 765-767 (September 2013): 2706–9. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.2706.

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Hybrid free space optical/radio frequency communication systems improve reliability of links. However, independent communication subsystems increase the system complexity, weight, size, and power consumption. Based on microwave photonics, a unified hybrid free space optical/radio frequency communication system design is proposed. The communication subsystems share antenna, modulator, and demodulator to simplify system structure. Operating principle is expounded by theoretical reference, and 3dB theoretical loss is found in millimeter-wave communication mode.
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33

Setti, Hicham, A. Maimouni, A. Tribak, and O. Souna. "Asymmetric Shunt Inductance Iris Rectangular Waveguide Filters for Satellite Communication Systems." E3S Web of Conferences 351 (2022): 01079. http://dx.doi.org/10.1051/e3sconf/202235101079.

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This paper presents the design, simulation and manufacture of two Asymmetrical filters based respectively on standard rectangular waveguides WR90 and WR75 in which resonant irises are inserted, operating respectively in the X-Band [9-11GHz] and Ku-Band [11-13GHz].The filter parameters were simulated by the MMM modal matching method (MMM) implemented in the Microwave-Wizard software, and that obtained by the CST-MWS software. The simulated results are in good agreement with those obtained by the experimental measurements.
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34

Naqvi, Aqeel, and Sungjoon Lim. "Review of Recent Phased Arrays for Millimeter-Wave Wireless Communication." Sensors 18, no. 10 (September 21, 2018): 3194. http://dx.doi.org/10.3390/s18103194.

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Owing to the rapid growth in wireless data traffic, millimeter-wave (mm-wave) communications have shown tremendous promise and are considered an attractive technique in fifth-generation (5G) wireless communication systems. However, to design robust communication systems, it is important to understand the channel dynamics with respect to space and time at these frequencies. Millimeter-wave signals are highly susceptible to blocking, and they have communication limitations owing to their poor signal attenuation compared with microwave signals. Therefore, by employing highly directional antennas, co-channel interference to or from other systems can be alleviated using line-of-sight (LOS) propagation. Because of the ability to shape, switch, or scan the propagating beam, phased arrays play an important role in advanced wireless communication systems. Beam-switching, beam-scanning, and multibeam arrays can be realized at mm-wave frequencies using analog or digital system architectures. This review article presents state-of-the-art phased arrays for mm-wave mobile terminals (MSs) and base stations (BSs), with an emphasis on beamforming arrays. We also discuss challenges and strategies used to address unfavorable path loss and blockage issues related to mm-wave applications, which sets future directions.
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35

Jimoh, Ahmed. "Determination of Transmission Coefficient and Electric Field Distribution of Rice Husk/ Pcl Composites Using Finite Element Method for Microwave Devices." April 2022 2, no. 2 (June 16, 2022): 1–4. http://dx.doi.org/10.36937/janset.2022.6647.

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Material thickness is one factor that is considered in the selection of materials for usage in microwave applications. The demand for microwaves technology is widely needed in modern applications such as cellular telephone, satellite communication, radar system, global positioning system, and microwave remote sensing systems. Experiments and results abound for microwave properties determination for inorganic materials. Focus has recently been shifted to agricultural waste composite for microwave application. It is on this basis that this work primarily focuses on investigates microwave transmission coefficients and electric field visualization of different rice husk/PCL sizes placed inside a rectangular waveguide using the finite element method (FEM). Determination of the transmission coefficient for different thickness of rice husk/PCL composites were performed at X-band frequency using FEM. The thicknesses for the rice husk/PCL composites simulated were 10, 15, 20, 30, and 50 mm. The results of the simulation for the transmission coefficient revealed that the 50 mm composites had the lowest value of 0.148468 for the transmission coefficient at 12 GHz while the electric field visualization showed that the 50 mm composites have the least value of electric field intensity. The results confirms that the 50 mm thick sample absorbs the highest radiation. Based on the results obtained, all sample thickness can be used for microwave dummies.
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36

Liess, M., R. Hua, and K. Elsenaar. "Microwave Communication to Moving Parts Inside Machines." International Journal of Advanced Manufacturing Technology 20, no. 1 (July 9, 2002): 58–62. http://dx.doi.org/10.1007/s001700200124.

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37

Opeyemi, Felix, and Charles Ndujiuba. "Migration from Microwave to Millimeter-wave for Next Generation Mobile Communication Systems." Communications on Applied Electronics 6, no. 7 (February 24, 2017): 1–7. http://dx.doi.org/10.5120/cae2017652373.

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38

Pedro, J. C., and N. B. Carvalho. "A novel nonlinear distortion characterisation standard for RF and microwave communication systems." Engineering Science & Education Journal 10, no. 3 (June 1, 2001): 113–19. http://dx.doi.org/10.1049/esej:20010306.

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39

Sivaradje, G., D. Saraswady, and P. Dananjayan. "A Dynamic Channel Assignment Algorithm for High Capacity Microwave Mobile Communication Systems." IETE Technical Review 18, no. 2-3 (March 2001): 207–10. http://dx.doi.org/10.1080/02564602.2001.11416963.

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40

Unchenko, I. V., and A. A. Emelyanov. "Specific Features of Designing Microwave Photonic Receiving and Transmitting Channels of Onboard Systems for Communication, Radar and Radio Monitoring." Journal of the Russian Universities. Radioelectronics 26, no. 1 (March 7, 2023): 58–67. http://dx.doi.org/10.32603/1993-8985-2023-26-1-58-67.

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Introduction. Designers of modern on-board systems for communication, radar, and radio monitoring face the problem of improving their qualitative characteristics, including the operating frequency, instantaneous bandwidth, receiver sensitivity, and electromagnetic compatibility. In addition, the dimensions, weight, and power of such systems, as well their cost, should be minimized. However, the current semiconductor microwave electronics has reached its limits in terms of frequency and dynamic characteristics. A possible solution consists in the implementation of microwave photonic transmission lines in the design of on-board systems for communication, radar, and radio monitoring on the basis of modulation of laser radiation by means of electro-absorption.Aim. To study the transfer characteristics and noise figure of a microwave photonic transmission line realized based on the modulation of laser radiation by means of electro-absorption. To compare the results of theoretical calculations and experimental investigations.Materials and methods. The research methodology involved external modulation using an electro-absorption modulator (EAM), mathematical representation of the transmission coefficient, as well as comparison of the theoretical and practical results.Results. Theoretical values of the transmission coefficient and noise figure for a microwave photonic transmission line based on the external modulation method using an EAM were obtained. Experimental values of the transmission coefficient and noise figure for a microwave photonic line in the frequency range from 100 MHz to 16 GHz were presented. The obtained data were compared with those of the nearest mass-produced products of foreign production and those presented in domestic publications on microwave photonic signal transmission lines.Conclusion. The use of an EAM, whose main advantage consists in the possibility of integration with a laser emitter, allowed the authors to design and manufacture a small-sized industrial prototype of a radio-photonic transceiver, capable of transmitting a radio signal over tens of kilometers in the frequency range from 100 MHz to 12 GHz with a transmission coefficient of at least −3 dB and a noise figure no more than 36 dB at the upper operating frequency. At the same time, the closest analogue manufactured by Emcore with similar dimensions has a transmission coefficient of −30 dB and uses direct modulation of laser radiation as a transmission method, which significantly reduces the transmission range of the microwave signal.
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41

Zhou, Yi, Lin Wang, Yifan Liu, Yuan Yu, and Xinliang Zhang. "Microwave Photonic Filters and Applications." Photonics 10, no. 10 (September 30, 2023): 1110. http://dx.doi.org/10.3390/photonics10101110.

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Microwave photonics is a promising and rapidly developing interdisciplinary field. It combines microwave and photonic techniques to generate, transmit, process, and manipulate microwave signals by using the advantages of broadband, high frequency, and low loss provided by photonics. As an important branch of microwave photonics, the microwave photonic filter (MPF) can overcome the limitations set by traditional electronic technology and can realize advanced signal processing in modern communication systems due to its higher performance, selectivity, and flexibility. This review provides a comprehensive overview of MPFs, including fundamental principles, typical structures, and key applications. Additionally, the microwave photonic integration is a very important tendence because of its advantages of small size, light weight, low power consumption, and low cost. The recent advances in integrated MPF are also reviewed.
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42

Balega, Yurii, Gregory Bubnov, Mikhail Glyavin, Aleksandra Gunbina, Dmitry Danilevsky, Grigory Denisov, Andrey Khudchenko, et al. "Atmospheric Propagation Studies and Development of New Instrumentation for Astronomy, Radar, and Telecommunication Applications in the Subterahertz Frequency Range." Applied Sciences 12, no. 11 (June 2, 2022): 5670. http://dx.doi.org/10.3390/app12115670.

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Current progress in the development of new subterahertz instruments discussed in this paper, including antennas, high-power gyrotrons, and low-noise receivers, provides a wide range of possible applications. Atmospheric absorption has now become a major limitation in the application of such high-performance subTHz systems, and the choice of the optimal location of antennas for astronomical, radar, and communication systems is important. The latest results of studying the microwave astroclimate in northern Eurasia are presented. Based on these studies, new perspectives and corrected plans for installing new antennas at the Suffa Plateau and in the Caucasus are formulated, and possible applications of new instruments such as radars for locating space debris and communication hubs for deep space communications, which are based on extremely-high-power gyrotrons and low-noise superconducting receivers, are discussed.
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43

Gounella, Rodrigo, Augusto Martins, Vinicius Pepino, Ben-Hur Viana Borges, and João Paulo Carmo. "A Low-Cost Instrument for Multidimensional Characterization of Advanced Wireless Communication Technologies." Applied Sciences 13, no. 11 (May 29, 2023): 6581. http://dx.doi.org/10.3390/app13116581.

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Exploring the potential of 3D printing in electromagnetic wave manipulation, this paper introduces a novel, cost-effective instrument for microwave metasurface characterization. Metasurfaces, designed to alter wave propagation, are promising tools for enhancing antenna efficiency in advanced telecommunication methods, such as 5G systems. However, their complex profile characterization often poses significant challenges. Our proposed fully automated four-axis instrument, leveraging 3D printing capable of creating complex structures (such as metasurfaces), addresses these challenges by offering an efficient and precise solution. The instrument, costing approximately USD 1550, successfully characterized a metalens designed for modulating 30 GHz signals with a 20 cm focal distance, proving its utility. The 2D and 3D intensity distribution profiles and key parameters (including 8.05 dB gain, 11 cm 3 dB depth of focus, and 2.17 cm full width at half maximum) were extracted. Our measurements notably corresponded with the theoretical diffraction calculations, validating the instrument’s efficacy. This breakthrough significantly contributes to microwave metasurface characterization techniques which are vital for future millimeter-wave communication systems.
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44

Ibrahim, Ahmed A., and Syed Muzahir Abbas. "Editorial for the Special Issue on the New Trends in Microwave/Millimeter Antennas/Filters: From Fundamental Research to Applications." Micromachines 14, no. 11 (October 30, 2023): 2019. http://dx.doi.org/10.3390/mi14112019.

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The rapid growth of wireless communication systems has led to high demand for the design of microwave/millimeter components with multiband characteristics, high performance, and ease of integration with other devices [...]
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45

Du, Yijie, Nan Cong, Xiaogang Wei, Xiaonan Zhang, Wenhao Luo, Jun He, and Renfu Yang. "Realization of multiband communications using different Rydberg final states." AIP Advances 12, no. 6 (June 1, 2022): 065118. http://dx.doi.org/10.1063/5.0095780.

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Rydberg atoms can serve as an atomic radio frequency receiver for digital and analog information transmission. In this paper, a ladder-type electromagnetically induced transparency system is prepared in a room temperature cesium atomic vapor cell. Microwave electric fields in the Ku band at a frequency of 12.52 GHz and the Ka band at a frequency of 39.80 GHz are used as two-channel communication carriers to demonstrate concurrent information transmission. Analog and digital communications are demonstrated by performing audio and pseudo-random binary sequence signal transmission, respectively. The dynamic range of the proposed system is ∼50 dB, and the communication bandwidth is more than 10 MHz. The obtained results demonstrate the fundamental principles of two- or multi-band communication systems based on different Rydberg final states.
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46

Hu, Cong, Yuanxiang Chen, Shangbin Sun, Jia Fu, and Jianguo Yu. "Optimization Method of Microwave Devices Based on Improved Extreme Learning Machine." Journal of Physics: Conference Series 2245, no. 1 (April 1, 2022): 012005. http://dx.doi.org/10.1088/1742-6596/2245/1/012005.

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Abstract With the rapid development of modern wireless technology, it is necessary to continuously optimize microwave devices to meet the higher requirements of communication systems. In this paper, we propose a microwave device optimization method based on extreme learning machine (ELM) and gray wolf optimizer (GWO). we adopt GWO to optimize the parameters of ELM and establish the mapping relationships between the microwave device design parameters and their responses. According to the inverse mapping of expected response, the expected design parameters of microwave devices are obtained. The numerical results show that the proposed method can improve the design efficiency of microwave devices and realize automatic optimization design compared with the existing method.
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47

Liu, Jin, Xiangru Wang, Feng Liang, and Chundi Wu. "61‐2: Implementation of Phased Array Antennas Based on Liquid Crystal Technology in Simulated Satellite Communication Systems." SID Symposium Digest of Technical Papers 55, S1 (April 2024): 524–26. http://dx.doi.org/10.1002/sdtp.17129.

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A simulated satellite communication system was constructed by introducing a phased array antenna based on liquid crystal (LC) technology to achieve communication with the transmitting antennas at various alignment angles. The 16 × 16 phased array antenna serves as the receiving antenna and employs tunable microwave LC material as the reconfigurable component to achieve 360° phase shift. The algorithm for controlling the wave is integrated into the FPGA to drive the antenna array and achieve the target beam deflection to maintain communication.
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48

Ma, Ying, Fangjing Shi, and Yangyu Fan. "A Microwave Photonic 2 × 2 IBFD–MIMO Communication System with Narrowband Self-Interference Cancellation." Micromachines 15, no. 5 (April 29, 2024): 593. http://dx.doi.org/10.3390/mi15050593.

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Combined in-band full duplex-multiple input multiple output (IBFD–MIMO) technology can significantly improve spectrum efficiency and data throughput, and has broad application prospects in communications, radar, the Internet of Things (IoT), and other fields. Targeting the self-interference (SI) issue in microwave photonic-based IBFD–MIMO communication systems, a microwave photonic self-interference cancellation (SIC) method applied to the narrowband 2 × 2 IBFD–MIMO communication system was proposed, simulated, and analyzed. An interleaver was used to construct a polarization multiplexing dual optical frequency comb with a frequency shifting effect, generating a dual-channel reference interference signal. The programmable spectrum processor was employed for filtering, attenuation, and phase-shifting operations, ensuring amplitude and phase matching to eliminate the two self-interference (SI) signals. The simulation results show that the single-frequency SIC depth exceeds 45.8 dB, and the narrowband SIC depth under 30 MHz bandwidth exceeds 32.7 dB. After SIC, the desired signal, employing a 4QAM modulation format, can be demodulated with an error vector magnitude (EVM) as low as 4.7%. Additionally, further channel expansion and system performance optimization are prospected.
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49

Md Rafiqul, Islam, Md Moktarul Alam, Ali Kodhim Lwas, and Sarah Yasmin Mohamad. "Rain Rate Distributions for Microwave Link Design Based on Long Term Measurement in Malaysia." Indonesian Journal of Electrical Engineering and Computer Science 10, no. 3 (June 1, 2018): 1023. http://dx.doi.org/10.11591/ijeecs.v10.i3.pp1023-1029.

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Attenuation due to rain is an important constraint in microwave radio link design especially at frequencies above 10 GHz. It restricts the path length of radio communication systems and limits the use of higher frequencies for line-of-sight microwave links and satellite communications. In order to predict the attenuation due to rain accurately rainfall intensity is required with 1-minute integration time. Rainfall is a meteorological phenomenon with complex structure due to its variability in space, duration and occurrence frequency, particularly in tropical and equatorial regions. Since, the statistical distribution of rain attenuation is obtained from the rain rate distribution for the region considered, it should be noted that the accuracy of the rain rate measurement affects the accuracy of the attenuation estimation. This paper presents rain intensity with 1-minute integration time measured for 6 years in Malaysia, it’s distribution, comparison with other prediction models and impact on high frequency microwave links.
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Piltyay, S. І., А. V. Bulashenko, А. V. Polishchuk, and О. V. Bulashenko. "Microwave waveguide polarizer for satellite communication antennas with circular polarization." Kosmìčna nauka ì tehnologìâ 28, no. 3 (July 18, 2022): 43–61. http://dx.doi.org/10.15407/knit2022.03.043.

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The volumes of information transmitted in modern satellite telecommunication systems are constantly increasing. Antennas with signal polarization processing, which is performed by polarizers, are the fundamental elements of such systems. Therefore, the development of methods for the analysis of new polarizers is an important problem. From a technological point of view, polarizers based on waveguides with irises are the simplest. Analysis and optimization of electromagnetic characteristics of a polarizer based on a square waveguide with irises are the goals of the presented research. To solve this optimization problem, we have created a new mathematical model, which allows investigating the influence of the design parameters of the polarizer on its electromagnetic characteristics. A mathematical model of the waveguide polarizer with irises was created by the method of decomposition using wave transmission and scattering matrices. Besides, the new mathematical model takes into account the thickness of the irises using their equivalent T- and П-shaped substitution circuits. The general wave scattering matrix is the basis of a new mathematical model of a waveguide polarizer. This matrix was determined using the theory of microwave circuits. The main characteristics of the waveguide polarizer were determined through the elements of this matrix. Here, we perform the optimization of the polarizer characteristics in the Ku-band 10.7–12.8 GHz. The developed new mathematical model of a waveguide polarizer with irises makes it possible to take into account the heights of the irises, distances between them and their thickness. The new mathematical model determines the electromagnetic characteristics of the polarizer in a simpler and faster way compared to the finite integration technique, which is often used for the analysis of microwave devices for various purposes
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