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Journal articles on the topic 'Microwave front-ends'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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Chu, James. "Integrated Microwave Front-Ends with Avionics Applications [Book\/Software Reviews]." IEEE Microwave Magazine 16, no. 4 (2015): 130–32. http://dx.doi.org/10.1109/mmm.2015.2398595.

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Martínez-Vázquez, Marta, Christos Oikonomopoulos-Zachos, Kai Maulwurf, et al. "Highly integrated antennas and front-ends for 60 GHz WLAN applications." International Journal of Microwave and Wireless Technologies 3, no. 2 (2011): 157–70. http://dx.doi.org/10.1017/s1759078711000298.

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This paper provides an overview of the research carried on in the EASY-A project concerning the design of antennas for different applications in the unlicensed band around 60 GHz, and their integration into compact RF front-ends. Different antenna configurations, in conventional microwave substrate and low-temperature co-fired ceramics (LTCC), were studied and fabricated. The results comply with the requirements established for various scenarios.

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Phuong, Linh Ta, Bernard Journet, and Duong Bach Gia. "A microwave active filter for nanosatellite’s receiver front-ends at s-bands." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 2 (2019): 973. http://dx.doi.org/10.11591/ijece.v9i2.pp973-981.

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<p>In satellite technology, the communication between space segment and ground segment plays a vital role in the success of the mission. This paper is targeted at study, design and fabrication of a microwave active filter for the receiver front-ends using coupled line filter structure, which can be applied to the nanosatellite’s communication subsystem. The whole active filter module is a combination of a microstrip bandpass filter and a preceding two-stage wideband low noise amplifier using FET devices. The proposed module operates in the frequency range of 2 - 2.4 GHz, which can be divided to 10 frequency slots of about 40 MHz for each. These frequency slots will be used for the S-band multi-frequency receiving function of the ground station, as well as the nanosatellite. The simulated and measured results of this active filter configuration are presented.</p>

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Rizzoli, Vittorio, Diego Masotti, and Franco Mastri. "Computation of near-carrier phase noise in large RF/microwave front ends." Microwave and Optical Technology Letters 26, no. 1 (2000): 24–30. http://dx.doi.org/10.1002/(sici)1098-2760(20000705)26:1<24::aid-mop8>3.0.co;2-d.

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Streifinger, M., T. Müller, J. F. Luy, and E. M. Biebl. "A software-radio front-end for microwave applications." Advances in Radio Science 1 (May 5, 2003): 201–5. http://dx.doi.org/10.5194/ars-1-201-2003.

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Abstract. In modern communication, sensor and signal processing systems digitisation methods are gaining importance. They allow for building software configurable systems and provide better stability and reproducibility. Moreover digital front-ends cover a wider range of applications and have better performance compared with analog ones. The quest for new architectures in radio frequency front-ends is a clear consequence of the ever increasing number of different standards and the resulting task to provide a platform which covers as many standards as possible. At microwave frequencies, in particular at frequencies beyond 10 GHz, no direct sampling receivers are available yet. A look at the roadmap of the development of commercial analog-to-digital-converters (ADC) shows clearly, that they can neither be expected in near future. We present a novel architecture, which is capable of direct sampling of band-limited signals at frequencies beyond 10 GHz by means of an over-sampling technique. The wellknown Nyquist criterion states that wide-band digitisation of an RF-signal with a maximum frequency ƒ requires a minimum sampling rate of 2 · ƒ . But for a band-limited signal of bandwidth B the demands for the minimum sampling rate of the ADC relax to the value 2 · B. Employing a noise-forming sigma-delta ADC architecture even with a 1-bit-ADC a signal-to-noise ratio sufficient for many applications can be achieved. The key component of this architecture is the sample-and-hold switch. The required bandwidth of this switch must be well above 2 · ƒ . We designed, fabricated and characterized a preliminary demonstrator for the ISM-band at 2.4 GHz employing silicon Schottky diodes as a switch and SiGe-based MMICs as impedance transformers and comparators. Simulated and measured results will be presented.

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Gomez-Garcia, Roberto, Dimitra Psychogiou, Jose-Maria Munoz-Ferreras, and Li Yang. "Avoiding RF Isolators: Reflectionless Microwave Bandpass Filtering Components for Advanced RF Front Ends." IEEE Microwave Magazine 21, no. 12 (2020): 68–86. http://dx.doi.org/10.1109/mmm.2020.3023222.

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Bonnet, B., R. Chiniard, H. Legay, et al. "Use of 3D Packaging Technology for Satellite Active Antennas Front-ends." International Symposium on Microelectronics 2012, no. 1 (2012): 000554–60. http://dx.doi.org/10.4071/isom-2012-wa14.

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Multi-Chip Module Vertical (MCM-V) technology, also called 3D packaging technology, enables the realization of a compact and low loss integrated feed for active antennas in Ka band. The active devices can be located in the vicinity of the radiating element, which reduces dramatically the volume and complexity of the antenna front-end for future architectures with more than a hundred beams in Ka band. This paper deals with the optimization of 3D packaging technology to reach the requirements of 30GHz microwave modules for space applications. The technological developments that have been led on the design and the assembly processes are detailed. The measurement results of an integrated feed module in radiation are given and the circuit designed to optimize the signal-to-noise ratio of the front-end for receiving antennas is characterized. The performance is as good as for an optimized planar front-end with a waveguide access for a much more compact module, especially in terms of footprint in an antenna array. These results successfully position 3D packaging as a disruptive technology for future space and telecom subsystems.

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Olomo Ngongo, A., R. Soares, and A. Perennec. "Network synthesis applied to the design of tuned optical front-ends for microwave lightwave systems." Electronics Letters 30, no. 2 (1994): 164–65. http://dx.doi.org/10.1049/el:19940120.

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Tillman, R. H., S. W. Ellingson, and J. Brendler. "Practical Limits in the Sensitivity-Linearity Trade-off for Radio Telescope Front Ends in the HF and VHF-low Bands." Journal of Astronomical Instrumentation 05, no. 02 (2016): 1650004. http://dx.doi.org/10.1142/s2251171716500045.

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Radio telescope front ends must have simultaneously low noise and sufficiently-high linearity to accommodate interfering signals. Typically these are opposing design goals. For modern radio telescopes operating in the HF (3–30[Formula: see text]MHz) and VHF-low (30–88[Formula: see text]MHz) bands, the problem is more nuanced in that front end noise temperature may be a relatively small component of the system temperature, and increased linearity may be required due to the particular interference problems associated with this spectrum. In this paper, we present an analysis of the sensitivity-linearity trade-off at these frequencies, applicable to existing commercially-available monolithic microwave integrated circuit (MMIC) amplifiers in single-ended, differential, and parallelized configurations. This analysis and associated findings should be useful in the design and upgrade of front ends for low frequency radio telescopes. The analysis is demonstrated explicitly for one of the better-performing amplifiers encountered in this study, the Mini-Circuits PGA-103, and is confirmed by hardware measurements. We also present a design based on the Mini-Circuits HELA-10 amplifier, which is better-suited for applications where linearity is a primary concern.

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Phuong, Linh Ta, Bernard Journet, and Duong Bach Gia. "Research, design and fabrication of a microwave active filter for nanosatellite’s receiver front-ends at s-band." TELKOMNIKA (Telecommunication Computing Electronics and Control) 17, no. 1 (2019): 23. http://dx.doi.org/10.12928/telkomnika.v17i1.10079.

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Han, Mei, Scott A. Braun, P. Ola G. Persson, and Jian-Wen Bao. "Alongfront Variability of Precipitation Associated with a Midlatitude Frontal Zone: TRMM Observations and MM5 Simulation." Monthly Weather Review 137, no. 3 (2009): 1008–28. http://dx.doi.org/10.1175/2008mwr2465.1.

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Abstract On 19 February 2001, the Tropical Rainfall Measuring Mission (TRMM) satellite observed complex alongfront variability in the precipitation structure of an intense cold-frontal rainband. The TRMM Microwave Imager brightness temperatures suggested that, compared to the northern and southern ends of the rainband, a greater amount of precipitation ice was concentrated in the middle portion of the rainband where the front bowed out. A model simulation conducted using the fifth-generation Pennsylvania State University–National Center for Atmospheric Research (PSU–NCAR) Mesoscale Model (MM5) is examined to explain the distribution of precipitation associated with the cold-frontal rainband. The simulation reveals that the enhanced precipitation ice production and the implied mean ascent along the central part of the front were associated with a synergistic interaction between a low-level front and an upper-level front associated with an intrusion of high-PV stratospheric air. The low-level front contributed to an intense bow-shaped narrow cold-frontal rainband (NCFR). The upper-level front was dynamically active only along the central to northern portion of the NCFR, where the upper-level PV advection and Q-vector convergence were most prominent. The enhanced mean ascent associated with the upper-level front contributed to a wide cold-frontal rainband (WCFR) that trailed or overlapped with the NCFR along its central to northern segments. Because of the combination of the forcing from both lower- and upper-level fronts, the ascent was deepest and most intense along the central portion of the front. Thus, a large concentration of precipitation ice, attributed to both the NCFR and WCFR, was produced.

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Xie, Yiwei, Zihan Geng, Leimeng Zhuang, et al. "Programmable optical processor chips: toward photonic RF filters with DSP-level flexibility and MHz-band selectivity." Nanophotonics 7, no. 2 (2017): 421–54. http://dx.doi.org/10.1515/nanoph-2017-0077.

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AbstractIntegrated optical signal processors have been identified as a powerful engine for optical processing of microwave signals. They enable wideband and stable signal processing operations on miniaturized chips with ultimate control precision. As a promising application, such processors enables photonic implementations of reconfigurable radio frequency (RF) filters with wide design flexibility, large bandwidth, and high-frequency selectivity. This is a key technology for photonic-assisted RF front ends that opens a path to overcoming the bandwidth limitation of current digital electronics. Here, the recent progress of integrated optical signal processors for implementing such RF filters is reviewed. We highlight the use of a low-loss, high-index-contrast stoichiometric silicon nitride waveguide which promises to serve as a practical material platform for realizing high-performance optical signal processors and points toward photonic RF filters with digital signal processing (DSP)-level flexibility, hundreds-GHz bandwidth, MHz-band frequency selectivity, and full system integration on a chip scale.

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Yang, Bill, Alexander G. Yarovoy, A. Shenario Ezil Valavan, Koen Buisman, and Oleksiy Shoykhetbrod. "A novel LTCC differentially Fed UWB antenna for the 60 GHz band." International Journal of Microwave and Wireless Technologies 3, no. 2 (2011): 171–77. http://dx.doi.org/10.1017/s1759078711000237.

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In this paper a novel differentially fed Ultra-Wide Band (UWB) antenna in low-temperature co-fired ceramics (LTCC) technology to be used in the 60 GHz band for integrated RF front-ends is presented. The antenna is based on the aperture stacked patch fed via H-shaped aperture to achieve more than 10 GHz operational bandwidth. The antenna is fed by a parallel-wire transmission line which enables the antenna to be directly integrated with differential Monolithic Microwave Integrated Circuits (MMICs). To alleviate influence of the surface waves (efficiently excited in LTCC material due to its high dielectric constant) on the antenna radiation and realize uni-directional radiation patterns, a dedicated shield is added to the antenna. The measured results of the shielded antenna showed that the antenna has an operational bandwidth from 51 GHz to over 65 GHz, the gain is about 3.5–8 dBi, and −5 dB beamwidth is about ±30°. The measurement results also demonstrated that the shield indeed improves the antenna impedance bandwidth, gain, and radiation patterns substantially.

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Sorrentino, Roberto, Paola Farinelli, Alessandro Cazzorla, and Luca Pelliccia. "RF-MEMS Application to RF Tuneable Circuits." Advances in Science and Technology 100 (October 2016): 100–108. http://dx.doi.org/10.4028/www.scientific.net/ast.100.100.

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The bursting wireless communication market, including 5G, advanced satellite communication systems and COTM (Communication On The Move) terminals, require ever more sophisticated functions, from multi-band and multi-function operations to electronically steerable and reconfigurable antennas, pushing technological developments towards the use of tunable microwave components and circuits. Reconfigurability allows indeed for reduced complexity and cost of the apparatuses. In this context, RF MEMS (Micro-Electro-Mechanical-Systems) technology has emerged as a very attractive solution to realize both tunable devices (e.g. variable capacitors, inductors and micro-relays), as well as complex circuits (e.g. tunable filters, reconfigurable matching networks and reconfigurable beam forming networks for phased array antennas). High linearity, low loss and high miniaturization are the typical advantages of RF MEMS over conventional technologies. Micromechanical components fabricated via IC-compatible MEMS technologies and capable of low-loss filtering, switching and frequency generation allow for miniaturized wireless front-ends via higher levels of integration. In addition, the inherent high linearity of the MEMS switches enables carrier aggregations without introducing intermodulation distortions. This paper will review the recent advances in the development of the RF MEMS to RF tunable circuits and systems.

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Wyatt, David. "Integrated Microwave Front-Ends: with Avionics Applications, L. G. Maloratsky, Artech House, 16 Sussex Street, London, SW1V 4RW, UK. 2012. 368pp. Illustrated. £109. ISBN 978-1-60807-205-7." Aeronautical Journal 116, no. 1183 (2012): 983. http://dx.doi.org/10.1017/s0001924000007429.

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"Performance Aspects of Multiband Microwave Planar Devices for Wireless Applications." International Journal of Innovative Technology and Exploring Engineering 9, no. 3 (2020): 2105–8. http://dx.doi.org/10.35940/ijitee.c8729.019320.

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The RF front end receiver plays a key role to fulfill the demands of the numerous applications in the wireless communication .This article of lettering portrays about the analysis of planar microstriplines based multiband passive microwave devices which are simulated in ADS (Advanced Design System) software. Also we have designed a multiband band pass filter, and multiband hybrid coupler which are essential in the front ends design of receivers such as software defined radio and cognitive radio. Here BPF covers the frequency range from 400 MHz-2GHz and hybrid coupler covers from 1-5GHz. With the use of these components the single band RF front end will become the multiband front end receiver architecture

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"Performance Analysis of Cascode and Inductive Regenerative Low Noise Amplifier for Wireless Applications." International Journal of Innovative Technology and Exploring Engineering 8, no. 9 (2019): 412–16. http://dx.doi.org/10.35940/ijitee.i7646.078919.

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The present world is ruled by wireless communication. From a telephone communication to satellite communication, the word “wireless” plays a major rule. In the recent years, the modem wireless communication in broadcast and microwave radio demands the properly designed Low Noise Amplifier (LNA) in receiver front ends for proper communication. The paper presents the design of high performance low noise amplifier at radio frequency regime. The LNA is implemented at operating frequency of 1.6 GHz and 2.6 GHz has been implemented at .18um CMOS process. LNA are regularly used in wireless communication receiver leading-ends due to their equity to intensify shaky Radio Frequency (RF) signals without summing additional noise. Cadence virtuoso tool has been used to implement the LNA design and the performance parameters are analyzed at operating frequency.

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