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Electronics
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RF, Microwave, and Millimeter Wave Devices and Circuits and Their...
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RF, Microwave, and Millimeter Wave Devices and Circuits and Their Applications

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Circuit and Signal Processing".

Deadline for manuscript submissions: 30 September 2024 | Viewed by 3440

Special Issue Editor

Dr. Reza K. Amineh

E-Mail Website
Guest Editor
Department of Electrical and Computer Engineering, New York Institute of Technology, New York, NY 10023, USA
Interests: applied electromagnetics; antennas; microwave
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The recent progress in the development of cost-effective and compact high frequency circuits in the RF, microwave, and millimeter wave domains has significantly broadened their applications. While many of these technologies were only used in military applications several decades ago, with the new developments, their use in various civilian applications is growing rapidly. The objective of this Special Issue is to provide an overview of the current research on “RF, Microwave, and Millimeter Wave Devices and Circuits and Their Applications”, highlighting the latest developments and innovations in modern applications, including, but not limited to, the following: wearable sensing, imaging, communication systems, wireless power transfer, sensors, radar, micro-electromechanical systems, power generation and transmission, RFID, oscillators, resonators, and so on. We will also try to identify new challenges and opportunities for new applications.

Dr. Reza K. Amineh
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Electronics is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Imaging
  • Microwave circuits
  • Millimeter wave circuits
  • Oscillators
  • Radar
  • Resonators
  • RF circuits
  • Sensors
  • Wearable sensing
  • Wireless power transfer

Published Papers (5 papers)

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Research

12 pages, 3462 KiB  
Article
Interstacked Transformer Quad-Core VCOs
by Daniele Tripoli, Giorgio Maiellaro, Santi Concetto Pavone and Egidio Ragonese
Electronics 2024, 13(5), 927; https://doi.org/10.3390/electronics13050927 - 29 Feb 2024
Viewed by 465
Abstract
This paper presents for the first time a quad-core oscillator based on a very compact interstacked transformer that tightly couples the four cores without oscillation mode ambiguity thanks to its strong magnetic coupling factor. As a proof of concept, a 19.125 GHz oscillator [...] Read more.
This paper presents for the first time a quad-core oscillator based on a very compact interstacked transformer that tightly couples the four cores without oscillation mode ambiguity thanks to its strong magnetic coupling factor. As a proof of concept, a 19.125 GHz oscillator for a narrowband 77 GHz radar system was designed in 28 nm fully depleted silicon-on-insulator CMOS technology with a general purpose back-end-of-line. The soundness of the proposed quad-core oscillator topology is demonstrated by comparison with state-of-the-art quad-core solutions, highlighting a significant advantage in terms of area occupation and power consumption. The proposed topology can be profitably exploited in several RF/mm-wave applications, such as radar and wireless communication systems. Full article
(This article belongs to the Special Issue RF, Microwave, and Millimeter Wave Devices and Circuits and Their Applications)
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17 pages, 10876 KiB  
Article
Analysis and Optimization Design Scheme of CMOS Ultra-Wideband Reconfigurable Polyphase Filters on Mismatch and Voltage Loss
by Yingze Wang, Xiaoran Li, Yuanze Wang, Xinghua Wang, Zicheng Liu, Fang Han and Quanwen Qi
Electronics 2024, 13(3), 658; https://doi.org/10.3390/electronics13030658 - 05 Feb 2024
Viewed by 517
Abstract
This manuscript presents an analysis and optimization scheme for the ultra-wideband passive reconfigurable polyphase filters (PPFs) to minimize I/Q (in-phase and quadrature-phase) phase/amplitude mismatch and voltage loss. By building a mathematical model of the voltage transfer, the relationship between the resonant frequency of [...] Read more.
This manuscript presents an analysis and optimization scheme for the ultra-wideband passive reconfigurable polyphase filters (PPFs) to minimize I/Q (in-phase and quadrature-phase) phase/amplitude mismatch and voltage loss. By building a mathematical model of the voltage transfer, the relationship between the resonant frequency of each stage and the I/Q mismatch and the relationship between the network impedance and the voltage loss are revealed, providing a scheme for PPF optimization. The proof-of-concept 2~8 GHz wideband reconfigurable PPF is designed in a 55 nm CMOS process. The optimization scheme enables the designed PPF to achieve an I/Q phase mismatch within 0.2439° and an I/Q amplitude mismatch within 0.098 dB throughout the entire band, and it shows great robustness during Monte Carlo sampling. The maximum voltage loss is 17.7 dB, and the total chip area is 0.174 × 0.145 mm2. Full article
(This article belongs to the Special Issue RF, Microwave, and Millimeter Wave Devices and Circuits and Their Applications)
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19 pages, 8136 KiB  
Article
A Miniaturized Bandpass Filter with Wideband and High Stopband Rejection Using LTCC Technology
by Yue Ma, Qifei Du, Wei Zhang, Cheng Liu and Hao Zhang
Electronics 2024, 13(1), 166; https://doi.org/10.3390/electronics13010166 - 29 Dec 2023
Viewed by 665
Abstract
This paper designs an L-band wide stopband bandpass filter by applying low-temperature cofired ceramic (LTCC) technology to the global positioning system (GPS) frequency band. Taking the Chebyshev filter as a prototype, an equivalent collector element (capacitive and inductor) structure is adopted to fully [...] Read more.
This paper designs an L-band wide stopband bandpass filter by applying low-temperature cofired ceramic (LTCC) technology to the global positioning system (GPS) frequency band. Taking the Chebyshev filter as a prototype, an equivalent collector element (capacitive and inductor) structure is adopted to fully use the three-dimensional package structure of LTCC to reduce the filter size. The filter is integrated into an eight-layer LTCC dielectric, and the series–parallel connection of the collector elements in the resonance unit is utilized to produce out-of-band transmission zeros, while the input and output ports’ capacitance is adjusted to control the bandwidth. Harmonic suppression is achieved by cascading two new compact stopband filters, while the size increase is insignificant due to LTCC technology. The simulation results are as follows: the center frequency is 1.575 GHz, 1 dB relative bandwidth is 6.3%, insertion loss in the passband is as slight as 1.6 dB, return loss is better than 30 dB, rejection bandwidth up to 16 GHz is more than 44 dB, and the volume of the whole filter is 6.2 × 3.7 × 0.78 mm3. Full article
(This article belongs to the Special Issue RF, Microwave, and Millimeter Wave Devices and Circuits and Their Applications)
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9 pages, 3670 KiB  
Communication
Time Domain Simulated Characterization of the Coplanar Waveguide in an On-Chip System for Millimeter Waveform Metrology
by Kejia Zhao, He Chen, Xiangjun Li, Jie Sun, Bo Li, Dexian Yan and Lanlan Li
Electronics 2024, 13(1), 145; https://doi.org/10.3390/electronics13010145 - 28 Dec 2023
Viewed by 474
Abstract
We investigate the time domain characterization of a coplanar waveguide (CPW) based on an on-chip electro-optic sampling (EOS) system for millimeter waveform metrology. The CPW is fabricated on a thin layer of low-temperature gallium arsenide (LT-GaAs), and the substrate material is GaAs. A [...] Read more.
We investigate the time domain characterization of a coplanar waveguide (CPW) based on an on-chip electro-optic sampling (EOS) system for millimeter waveform metrology. The CPW is fabricated on a thin layer of low-temperature gallium arsenide (LT-GaAs), and the substrate material is GaAs. A femtosecond laser generates and detects ultrashort pulses on the CPW. The forward propagating pulses are simulated using a simplified current source for the femtosecond laser at different positions on the CPW for the first time. Then, the influences of the CPW geometry parameters on the measured pulses are discussed. The varying slot width has larger influences on the amplitude of millimeter wave pulses than the center conductor width and the pumping gap. Finally, in the frequency range of 10 GHz to 500 GHz, the transfer functions calculated by the time domain pulses are in good agreement with the transfer functions calculated by the frequency domain ports. The above results are important for improving the measurement precision of the millimeter waveform on the CPW for millimeter waveform metrology. Full article
(This article belongs to the Special Issue RF, Microwave, and Millimeter Wave Devices and Circuits and Their Applications)
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11 pages, 7790 KiB  
Communication
Design Techniques for L-C-L T-Type Wideband CMOS Phase Shifter with Suppressed Phase Error
by Seongjin Jang and Changkun Park
Electronics 2023, 12(20), 4368; https://doi.org/10.3390/electronics12204368 - 21 Oct 2023
Viewed by 891
Abstract
In this study, we designed a K-band CMOS switch-type phase shifter. Equivalent circuits of shift and pass modes were analyzed to minimize phase errors in a wide frequency range. In particular, the impedance inside the equivalent circuit of the pass mode was analyzed [...] Read more.
In this study, we designed a K-band CMOS switch-type phase shifter. Equivalent circuits of shift and pass modes were analyzed to minimize phase errors in a wide frequency range. In particular, the impedance inside the equivalent circuit of the pass mode was analyzed to derive a frequency region in which the equivalent circuit of the pass mode becomes an L-C-L structure. Based on the fact that equivalent circuits in shift and pass modes can be regarded as L-C-L structures beyond a specific frequency, a design methodology of the wideband phase shifter was proposed through slope adjustment of the phase according to the frequency of each of the two modes. To verify the feasibility of the proposed design methodology, a 20°-bit phase shifter was designed through a 65 nm RFCMOS process. As a result of the measurement at 21.5 GHz to 40.0 GHz, the phase error was within 0.87°. Full article
(This article belongs to the Special Issue RF, Microwave, and Millimeter Wave Devices and Circuits and Their Applications)
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