Relevant bibliographies by topics / Conjugate Impedance Matching Techniques

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Conjugate Impedance Matching Techniques'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Conjugate Impedance Matching Techniques"

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Brufau-Penella, J., and M. Puig-Vidal. "Piezoelectric Energy Harvesting Improvement with Complex Conjugate Impedance Matching." Journal of Intelligent Material Systems and Structures 20, no. 5 (November 28, 2008): 597–608. http://dx.doi.org/10.1177/1045389x08096051.

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One way to enhance the efficiency of energy harvesting systems is complex conjugate impedance matching of its electrical impedance. In Piezoelectric energy Harvesting systems the match is done to increment the energy flows from a vibration energy source to an energy storage electrical circuit. In this article, we compare the power generated using the modulus impedance matching with the power generated using the complex conjugate impedance matching. We present the power ratio between both types of matching methods. The novelty of this article consists of a piezoelectric transducer completely adapted with a complex conjugate impedance match. The theory developed is validated on a commercial piezoelectric transducer QP40w from Midé Technology. The transducer model is first identified by means of a system identification step based on a novel two-port Lumped-Electromechanical Model. The QP40w is complex conjugate matched at its fourth resonant mode increasing the generated power by up to 20% more compared with the modulus match.
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Wang, Hong Yan, Xiao Biao Shan, and Tao Xie. "Complex Impedance Matching for Power Improvement of a Circular Piezoelectric Energy Harvester." Applied Mechanics and Materials 148-149 (December 2011): 169–72. http://dx.doi.org/10.4028/www.scientific.net/amm.148-149.169.

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The impedance matching and the optimization of power from a circular piezoelectric energy harvester with a central-attached mass are studied. A finite element model is constructed to analyze the electrical equivalent impedance of the circular piezoelectric energy harvester. Furthermore, the complex conjugate matching load is used to extract the maximum output power of the energy harvester. The power output from complex conjugate matching load is compared with the power output from the resistive matching load and a constant resistance, separately. The results suggest that the complex conjugate matching can result in a significant increase of the output power for all frequencies. The effective bandwidth of the piezoelectric energy harvester is extended significantly.
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Cioffi, K. R. "Broad-band distributed amplifier impedance-matching techniques." IEEE Transactions on Microwave Theory and Techniques 37, no. 12 (1989): 1870–76. http://dx.doi.org/10.1109/22.44096.

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Sharma, Sonia, C. C. Tripathi, and Rahul Rishi. "Impedance Matching Techniques for Microstrip Patch Antenna." Indian Journal of Science and Technology 10, no. 28 (February 1, 2017): 1–16. http://dx.doi.org/10.17485/ijst/2017/v10i28/97642.

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Wang and Cao. "A Review of Impedance Matching Techniques in Power Line Communications." Electronics 8, no. 9 (September 12, 2019): 1022. http://dx.doi.org/10.3390/electronics8091022.

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Impedance mismatch that degrades signal power transfer and affects communication reliability is a major obstacle for power line communications (PLC). Impedance matching techniques can be designed to effectively compensate for the impedance mismatch between PLC modems and power line networks at a specific frequency or for a given frequency band. In this paper, we discuss the tradeoffs that need to be made when designing an effective impedance matching network. We also make a comprehensive review of previous state-of-the-art PLC impedance matching techniques and provide a useful classification of each technique. Finally, we discuss important issues (concerns) and provide suggestions for research directions deserving more attention. This review provides a useful guideline for researchers and manufacturers to quickly understand impedance matching principles and facilitate the design of an effective impedance matching coupler for PLC applications.
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Rathod, Vivek T. "A Review of Electric Impedance Matching Techniques for Piezoelectric Sensors, Actuators and Transducers." Electronics 8, no. 2 (February 1, 2019): 169. http://dx.doi.org/10.3390/electronics8020169.

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Any electric transmission lines involving the transfer of power or electric signal requires the matching of electric parameters with the driver, source, cable, or the receiver electronics. Proceeding with the design of electric impedance matching circuit for piezoelectric sensors, actuators, and transducers require careful consideration of the frequencies of operation, transmitter or receiver impedance, power supply or driver impedance and the impedance of the receiver electronics. This paper reviews the techniques available for matching the electric impedance of piezoelectric sensors, actuators, and transducers with their accessories like amplifiers, cables, power supply, receiver electronics and power storage. The techniques related to the design of power supply, preamplifier, cable, matching circuits for electric impedance matching with sensors, actuators, and transducers have been presented. The paper begins with the common tools, models, and material properties used for the design of electric impedance matching. Common analytical and numerical methods used to develop electric impedance matching networks have been reviewed. The role and importance of electrical impedance matching on the overall performance of the transducer system have been emphasized throughout. The paper reviews the common methods and new methods reported for electrical impedance matching for specific applications. The paper concludes with special applications and future perspectives considering the recent advancements in materials and electronics.
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Dasgupta, K., A. Dutta, and T. K. Bhattacharyya. "Parasitic aware impedance matching techniques for RF amplifiers." Analog Integrated Circuits and Signal Processing 70, no. 1 (June 5, 2011): 91–102. http://dx.doi.org/10.1007/s10470-011-9659-9.

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van Bezooijen, A., M. A. de Jongh, F. van Straten, R. Mahmoudi, and A. van Roermund. "Adaptive Impedance-Matching Techniques for Controlling L Networks." IEEE Transactions on Circuits and Systems I: Regular Papers 57, no. 2 (February 2010): 495–505. http://dx.doi.org/10.1109/tcsi.2009.2023764.

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HEMMINGER, THOMAS L. "ANTENNA IMPEDANCE MATCHING WITH NEURAL NETWORKS." International Journal of Neural Systems 15, no. 05 (October 2005): 357–61. http://dx.doi.org/10.1142/s0129065705000335.

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Impedance matching between transmission lines and antennas is an important and fundamental concept in electromagnetic theory. One definition of antenna impedance is the resistance and reactance seen at the antenna terminals or the ratio of electric to magnetic fields at the input. The primary intent of this paper is real-time compensation for changes in the driving point impedance of an antenna due to frequency deviations. In general, the driving point impedance of an antenna or antenna array is computed by numerical methods such as the method of moments or similar techniques. Some configurations do lend themselves to analytical solutions, which will be the primary focus of this work. This paper employs a neural control system to match antenna feed lines to two common antennas during frequency sweeps. In practice, impedance matching is performed off-line with Smith charts or relatively complex formulas but they rarely perform optimally over a large bandwidth. There have been very few attempts to compensate for matching errors while the transmission system is in operation and most techniques have been targeted to a relatively small range of frequencies. The approach proposed here employs three small neural networks to perform real-time impedance matching over a broad range of frequencies during transmitter operation. Double stub tuners are being explored in this paper but the approach can certainly be applied to other methodologies. The ultimate purpose of this work is the development of an inexpensive microcontroller-based system.
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Arai, Takaya, and Hiroshi Hirayama. "Folded Spiral Resonator with Double-Layered Structure for Near-Field Wireless Power Transfer." Energies 13, no. 7 (April 1, 2020): 1581. http://dx.doi.org/10.3390/en13071581.

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In this paper, a folded spiral resonator with a double-layered structure for near-field wireless power transfer is proposed. In near-field wireless power transfer, conjugate impedance matching is important to achieve high transfer efficiency. To achieve maximum available efficiency, it is common to connect a matching circuit to the antenna. However, the loss increases if a matching circuit is used. A coupling inductor with a resonant capacitor has the capability to adjust an imaginary part of the input impedance, whereas the folded spiral resonator has the capability to adjust both the imaginary and real parts of the input impedance. This resonator can achieve the maximum available efficiency without a matching circuit. This paper shows that the folded spiral resonator with a double-layered structure realizes high transfer efficiency compared to conventional models.
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Dissertations / Theses on the topic "Conjugate Impedance Matching Techniques"

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Butt, Munam. "Systemization of RFID Tag Antenna Design Based on Optimization Techniques and Impedance Matching Charts." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23064.

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The performance of commercial Radio Frequency Identification (RFID) tags is primarily limited by present techniques used for tag antenna design. Currently, industry techniques rely on identifying the RFID tag application (books, clothing, etc.) and then building antenna prototypes of different configurations in order to satisfy minimum read range requirements. However, these techniques inherently lack an electromagnetic basis and are unable to provide a low cost solution to the tag antenna design process. RFID tag performance characteristics (read-range, chip-antenna impedance matching, surrounding environment) can be very complex, and a thorough understanding of the RFID tag antenna design may be gained through an electromagnetic approach in order to reduce the tag antenna size and the overall cost of the RFID system. The research presented in this thesis addresses RFID tag antenna design process for passive RFID tags. With the growing number of applications (inventory, supply-chain, pharmaceuticals, etc), the proposed RFID antenna design process demonstrates procedures to design tag antennas for such applications. Electrical/geometrical properties of the antennas designed were investigated with the help of computer electromagnetic simulations in order to achieve optimal tag performance criteria such as read range, chip-impedance matching, antenna efficiency, etc. Experimental results were performed on the proposed antenna designs to compliment computer simulations and analytical modelling.
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Sockolov, Kamron. "UHF RFID Antenna Impedance Matching Techniques." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1713.

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Radio Frequency Identification (RFID) systems use electromagnetic signals to wirelessly identify and track RFID-tagged objects. A reader transmits a carrier wave request signal to an RFID tag, which then transmits a unique identification signal back to the reader. Applications include supply chain inventory management, automated toll booth fee systems, sports event timing, restricted access control, pet monitoring and retail theft prevention. An RFID tag includes an antenna connected to a Radio Frequency Integrated Circuit (RFIC). RFID tags in the ultra-high frequency (UHF), industrial, scientific and medical (ISM) 902-928MHz band and global Electronic Product Code (EPC) 860‑960MHz band are powered passively (power extracted from carrier wave) and cost less than 15 cents per tag. Low cost UHF ISM RFID tags are an effective solution for tracking large inventories. UHF ISM tag antennas are typically planar dipoles printed onto a plastic dielectric substrate (inlay). Power exchange and transmit range is maximized when a tag antenna’s input impedance is conjugate matched to the RFIC input impedance. Since RFIC input impedance includes capacitive reactance, optimized antenna input impedance includes compensating inductive reactance. The T-match network adds inductive matching microstrips to conjugate match the RFIC. Narrowband (±1.5% of center frequency) and broadband (±5% of center frequency) lumped element designs also use inductive matching strips. Narrowband, lumped element design is accomplished through Smith Chart matching assuming lumped antenna elements. The broadband lumped element design is accomplished through a circuit transformation to an equivalent network and tuning the transformed circuit to resonate from 865MHz to 955MHz, with a center frequency of 910MHz. This thesis demonstrates a start-to-finish design process for narrow (±1.5% of center frequency) and broadband (±5% of center frequency) RFID tag antennas [3]. Furthermore, antenna matching element geometries are parametrically swept to characterize input impedance frequency response. Thesis accomplishments include (a) narrow and broadband antenna designs, (b) Keysight’s Advanced Design System (ADS) Momentum simulations, (c) antenna fabrication, and (d) differential probe impedance setup and antenna impedance measurements. Additional items include (e) impedance adjustments (f) tag range testing and (g) narrow vs. broadband matching technique comparisons. Antennas were fabricated in Cal Poly’s Graphic Communication Department by silk-screening silver conductive ink onto DuPont Melinix Polyethylene Terephthalate (PET) plastic. Impedance simulations are compared to fabricated antenna impedance measurements and range testing results.
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Kamprath, Richard Alan. "Impedance matching techniques for ethernet communication systems." Texas A&M University, 2003. http://hdl.handle.net/1969.1/5856.

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In modern local area networks, the communication signals sent from one computer to another across the lines of transmission are degraded because of reflection at the receiver. This reflection can be characterized through the impedances of the transmitter and the receiver, and is defined by the Institute of Electrical and Electronic Engineers (IEEE) as the S11 return loss. The specifications for S11 return loss in Gigabit Ethernet are given in terms of magnitude only in the IEEE 802.3 guidelines. This does not fully take into account, however, the effects of frequency dependant impedances within the bandwidth of interest. With a range of 30% error in the category 5, or CAT5, transmission line impedance used in this specification and no further requirements for individual components within the Gigabit Ethernet port, such as the RJ45 magjack or the physical layer, the system can easily be out of tolerance for return loss error. A simple impedance matching circuit could match the CAT5 cable to the physical layer such that the return loss is minimized and the S21 transmission is maximized. The first part of the project was commissioned by Dell Computer to characterize the return loss of all of its platforms. This thesis goes further in the creation of a system that can balance these two impedances so that the IEEE specification failure rate is reduced with the lowest implementation cost, size, power and complexity. The return loss data were used in the second phase of the project as the basis for component ranges needed to balance the impedance seen at the front of the physical layer to the CAT5 transmission line. Using the ladder network theory, an impedance matching circuit was created that significantly reduced the S11 return loss in the passband of the equivalent ladder network. To manage this iterative process, a control loop was also designed. While this system does not produce the accuracy that a programmable finite impulse response (FIR) filter could, it does improve performance with relatively minimal cost, power, area and complexity.
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David, Antoine Michel. "Design of active vibration isolators using impedance matching techniques and power concepts." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301209.

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Giuliano, Alessandro. "Enhanced piezoelectric energy harvesting powered wireless sensor nodes using passive interfaces and power management approach." Thesis, Cranfield University, 2014. http://dspace.lib.cranfield.ac.uk/handle/1826/8834.

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Low-frequency vibrations typically occur in many practical structures and systems when in use, for example, in aerospaces and industrial machines. Piezoelectric materials feature compactness, lightweight, high integration potential, and permit to transduce mechanical energy from vibrations into electrical energy. Because of their properties, piezoelectric materials have been receiving growing interest during the last decades as potential vibration- harvested energy generators for the proliferating number of embeddable wireless sensor systems in applications such as structural health monitoring (SHM). The basic idea behind piezoelectric energy harvesting (PEH) powered architectures, or energy harvesting (EH) more in general, is to develop truly “fit and forget” solutions that allow reducing physical installations and burdens to maintenance over battery-powered systems. However, due to the low mechanical energy available under low-frequency conditions and the relatively high power consumption of wireless sensor nodes, PEH from low-frequency vibrations is a challenge that needs to be addressed for the majority of the practical cases. Simply saying, the energy harvested from low-frequency vibrations is not high enough to power wireless sensor nodes or the power consumption of the wireless sensor nodes is higher than the harvested energy. This represents a main barrier to the widespread use of PEH technology at the current state of the development, despite the advantages it may offer. The main contribution of this research work concerns the proposal of a novel EH circuitry, which is based on a whole-system approach, in order to develop enhanced PEH powered wireless sensor nodes, hence to compensate the existing mismatch between harvested and demanded energy. By whole-system approach, it is meant that this work develops an integrated system-of-systems rather than a single EH unit, thus getting closer to the industrial need of a ready- to-use energy-autonomous solution for wireless sensor applications such as SHM. To achieve so, this work introduces: Novel passive interfaces in connection with the piezoelectric harvester that permit to extract more energy from it (i.e., a complex conjugate impedance matching (CCIM) interface, which uses a PC permalloy toroidal coil to achieve a large inductive reactance with a centimetre- scaled size at low frequency; and interfaces for resonant PEH applications, which exploit the harvester‟s displacement to achieve a mechanical amplification of the input force, a magnetic and a mechanical activation of a synchronised switching harvesting on inductor (SSHI) mechanism). A novel power management approach, which permits to minimise the power consumption for conditioning the transduced signal and optimises the flow of the harvested energy towards a custom-developed wireless sensor communication node (WSCN) through a dedicated energy-aware interface (EAI); where the EAI is based on a voltage sensing device across a capacitive energy storage. Theoretical and experimental analyses of the developed systems are carried in connection with resistive loads and the WSCN under excitations of low frequency and strain/acceleration levels typical of two potential energy- autonomous applications, that are: 1) wireless condition monitoring of commercial aircraft wings through non-resonant PEH based on Macro-Fibre Composite (MFC) material bonded to aluminium and composite substrates; and wireless condition monitoring of large industrial machinery through resonant PEH based on a cantilever structure. shown that under similar testing conditions the developed systems feature a performance in comparison with other architectures reported in the literature or currently available on the market. Power levels up to 12.16 mW and 116.6 µW were respectively measured across an optimal resistive load of 66 277 kΩ for an implemented non-resonant MFC energy harvester on aluminium substrate and a resonant cantilever-based structure when no interfaces were added into the circuits. When the WSCN was connected to the harvesters in place of the resistive loads, data transmissions as fast as 0.4 and s were also respectively measured. By use of the implemented passive interfaces, a maximum power enhancement of around 95% and 452% was achieved in the two tested cases and faster data transmissions obtained with a maximum percentage improvement around 36% and 73%, respectively. By the use of the EAI in connection with the WSCN, results have also shown that the overall system‟s power consumption is as low as a few microwatts during non- active modes of operation (i.e., before the WSCN starts data acquisition and transmission to a base station). Through the introduction of the developed interfaces, this research work takes a whole-system approach and brings about the capability to continuously power wireless sensor nodes entirely from vibration-harvested energy in time intervals of a few seconds or fractions of a second once they have been firstly activated. Therefore, such an approach has potential to be used for real-world energy- autonomous applications of SHM.
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Kalayci, Sefa. "Design Of A Radio Frequency Identification (rfid) Antenna." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610554/index.pdf.

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Fundamental features of Radio Frequency Identification (RFID) systems used in different application areas will be reviewed. Techniques used in realizing RFID antenna systems will be studied and the procedure to realize a specific RFID antenna type possessing desired characteristics will be described. Electrical properties such as radiation pattern, impedance will be predicted using analytical and/or computer simulation techniques. Experimental investigations will be carried out to complement the theoretical work.
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Dupuis, Claude Denis J. "Impedance matching of a dual-band antenna feed using computer aided design techniques." 1985. http://hdl.handle.net/1993/15082.

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Book chapters on the topic "Conjugate Impedance Matching Techniques"

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Rama Devi, K., A. Mallikarjuna Prasad, and A. Jhansi Rani. "Design of RFID Tag Antenna with Impedance Matching Techniques at UHF Band." In Lecture Notes in Electrical Engineering, 119–40. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8234-4_12.

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"Impedance-Matching Techniques." In High-Frequency and Microwave Circuit Design, Second Edition, 37–57. CRC Press, 2007. http://dx.doi.org/10.1201/b13604-4.

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"Impedance Matching." In Microwave Circuit Design Using Linear and Nonlinear Techniques, 241–72. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471715832.ch5.

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Prasad, S. N. "Microwave Impedance Matching Techniques." In Handbook of Microwave Technology, 617–69. Elsevier, 1995. http://dx.doi.org/10.1016/b978-012374695-5/50019-5.

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Prasad, S. N. "Microwave Impedance Matching Techniques." In Components and Devices, 617–69. Elsevier, 1995. http://dx.doi.org/10.1016/b978-0-08-052377-4.50021-8.

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"Appendix E: Impedance Matching Techniques." In Microstrip and Printed Antenna Design, 268–83. Institution of Engineering and Technology, 2009. http://dx.doi.org/10.1049/sbew048e_appendixe.

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"Appendix E - Impedance matching techniques." In Microstrip and Printed Antenna Design, 271–85. Institution of Engineering and Technology, 2019. http://dx.doi.org/10.1049/pbte083e_appendixe.

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Oulhaj, Otman, Amar Touhami Naima, and Aghoutante Mohamed. "Miniaturization of Printed Microstrip Antennas Array by Using Defected Ground Structure Technique." In Advances in Computer and Electrical Engineering, 101–46. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7539-9.ch004.

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In this chapter, the authors present different techniques used to miniature microstrip antennas, particularly planar antennas array, for different applications demanding small dimensions. This will cover DGS, slot technique, and metamaterials. After the presentation of these techniques based on theoretical studies, the second part of this chapter will be about the authors' contribution in the miniaturization of microstrip antennas arrays. This part will include the presentation of some miniature antennas array which they have validated into simulation and measurement by using DGS techniques. The different structures were validated into simulation by using tow electromagnetic solvers ADS (advanced design system) and CST-MW (computer simulation technology) which permit one to validate and to verify the different performances of antennas arrays as radiation pattern, matching input impedance and small dimensions.
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Elamin, Nassrin, and Tharek Rahman. "Limited Size MIMO Antenna Systems and Mutual Coupling Challenge." In Wideband, Multiband, and Smart Reconfigurable Antennas for Modern Wireless Communications, 176–202. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-8645-8.ch006.

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The wireless communication high data rate is achievable by installing more than one antenna in receiver and transmitter terminals as MIMO antenna. In order to obtain the MIMO gain (Envelope Correlation Coefficient (ECC) = 0.5), the antenna elements must be at least separated by a distance of 0.5? (? is the operating wavelength of 0.7~3.8 GHz which is the frequency range of most of the current wireless communication applications). This value is big relative to limited sizes devices. A practical MIMO antenna should have a low signal correlation between the antenna elements and good matching features for input impedance. Moreover, MIMO system performance can be improved by reducing mutual coupling between closely spaced antenna elements. Miniature high isolated MIMO antenna system has been presented in this chapter; also many MIMO antenna systems were analyzed and categorized based on the implemented isolation techniques. Furthermore several MIMO antenna evaluation methods have been discussed.
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Conference papers on the topic "Conjugate Impedance Matching Techniques"

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Sockolov, Kamron, and Dean Arakaki. "UHF RFID antenna impedance matching techniques." In 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. IEEE, 2017. http://dx.doi.org/10.1109/apusncursinrsm.2017.8073259.

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Thompson, M. "Design software for impedance matching networks." In 7th International Conference on High Frequency Radio Systems and Techniques. IEE, 1997. http://dx.doi.org/10.1049/cp:19970838.

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Wang, Qinghua, Wenquan Che, Giuseppina Monti, Mauro Mongiardo, Marco Dionigi, and Franco Mastri. "Conjugate image impedance matching for maximizing the gains of a WPT link." In 2018 IEEE MTT-S International Wireless Symposium (IWS). IEEE, 2018. http://dx.doi.org/10.1109/ieee-iws.2018.8400873.

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Sun, Y. "Practical considerations of impedance matching network design." In Sixth International Conference on `HF Radio Systems and Techniques'. IEE, 1994. http://dx.doi.org/10.1049/cp:19940498.

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Cheng, Yuhua, Huanhuan Wu, and Gaofeng Wang. "Improving Power Delivery of CPT for Biomedical Implants by Using Conjugate Impedance Matching." In 2019 IEEE Biomedical Circuits and Systems Conference (BioCAS). IEEE, 2019. http://dx.doi.org/10.1109/biocas.2019.8919178.

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Bilik, Vladimir. "Stub swapping in automatic three-stub impedance matching systems." In 2013 13th Conference on Microwave Techniques (COMITE). IEEE, 2013. http://dx.doi.org/10.1109/comite.2013.6545069.

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Oraizi, Homayoon, Mehdi Seyyed Esfahlan, and Ebrahim Forati. "Design of stepped-impedance low pass filters with impedance matching by the particle swarm optimization and conjugate gradient method." In 2009 European Conference on Circuit Theory and Design (ECCTD 2009). IEEE, 2009. http://dx.doi.org/10.1109/ecctd.2009.5275068.

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Mamedes, Deisy Formiga, Joao Paulo Fernandes da Silva, Juliete da Silva Souza, Thamyris da Silva Evangelista, Thayuan Rolim de Sousa, and Paulo Henrique da Fonseca Silva. "Analysis of impedance matching techniques in tapered microstrip patch antenna." In 2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC). IEEE, 2017. http://dx.doi.org/10.1109/imoc.2017.8121034.

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Sikina, Thomas V. "Wide Angle Impedance Matching techniques for volumetrically scanned phased arrays." In 2010 IEEE International Symposium on Phased Array Systems and Technology (ARRAY 2010). IEEE, 2010. http://dx.doi.org/10.1109/array.2010.5613252.

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Qureshi, Y. "Dynamic impedance matching of transmission cables for downhole tools." In IEE Seminar On-Line Monitoring Techniques for the Off-Shore Industry. IEE, 1999. http://dx.doi.org/10.1049/ic:19990731.

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