RF, Microwave, and Millimeter Wave Devices and Circuits and Their Applications, 2nd Edition

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

Deadline for manuscript submissions: 15 December 2025 | Viewed by 594

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Department of Electrical and Computer Engineering, New York Institute of Technology, New York, NY 10023, USA
Interests: microwave imaging; microwave component design; antennas; microwave nondestructive testing of materials; microwave biomedical applications
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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 these new developments, their use in various civilian applications is growing rapidly.

This Special Issue aims to provide an overview of the current research on “RF, Microwave, and Millimeter Wave Devices and Circuits and Their Applications, 2nd Edition”, and we welcome the submission of papers on 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 also aim to identify new challenges and opportunities for new applications.

We look forward to receiving your valuable contributions.

Dr. Reza K. Amineh
Guest Editor

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Keywords

  • imaging
  • microwave circuits
  • millimeter wave circuits
  • oscillators
  • radar
  • resonators
  • RF circuits
  • sensors
  • wearable sensing
  • wireless power transfer

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Research

19 pages, 3275 KB  
Article
Design and Analysis of Compact K/Ka-Band CMOS Four-Way Power Splitters for K/Ka-Band LEO Satellite Communications and 28/39 GHz 5G NR
by Yo-Sheng Lin and Chin-Yi Huang
Electronics 2025, 14(18), 3736; https://doi.org/10.3390/electronics14183736 - 21 Sep 2025
Viewed by 437
Abstract
We present the design and analysis of three CMOS 4-way power splitters operating in the K/Ka-band (18–27 GHz/27–40 GHz) for low Earth orbit (LEO) satellite communications and 26.5–29.5/37–40 GHz 5G radio applications. The first power splitter (PS1) consists of a two-way power splitter [...] Read more.
We present the design and analysis of three CMOS 4-way power splitters operating in the K/Ka-band (18–27 GHz/27–40 GHz) for low Earth orbit (LEO) satellite communications and 26.5–29.5/37–40 GHz 5G radio applications. The first power splitter (PS1) consists of a two-way power splitter using circular double-helical transmission lines (DH-TLs) cascaded with two two-way power splitters using noninverting circular sole-helical coupled-TL (SH-CL). The second power splitter (PS2) consists of a two-way power splitter using circular DH-TLs cascaded with two two-way power splitters using inverting circular SH-CL. The third power splitter (PS3) consists of three two-way power splitters using DH-TLs. For each two-way power splitter, a parallel input capacitor is included to satisfy the requirement for two equivalent quarter-wavelength (λ/4) TLs, ensuring a low input reflection coefficient. λ/10-DH-TL-based-double-λ/4-TLs, λ/12-noninverting-SH-CL-based-double-λ/4-TLs, and λ/9-inverting-SH-CL-based-double-λ/4-TLs are utilized to attain compact chip size and low amplitude inequality (AI) and phase deviation (PD). Prominent results are attained. For instance, the chip size of PS1 is 0.057 mm2. At 33 GHz, PS1 attains S11 of −16 dB, S22 of −21.2 dB, S33 of −19.7 dB, S23 of −15.3 dB, S21 of −7.862 dB, S31 of −7.803 dB, AI23 of −0.059 dB, and PD23 of 0.197°. The chip size of PS2 is 0.071 mm2. At 33 GHz, PS2 attains S11 of −13.5 dB, S22 of −16.1 dB, S33 of −16.7 dB, S23 of −34.8 dB, S21 of −8.1 dB, S31 of −8.146 dB, AI23 of 0.046 dB, and PD23 of −0.581°. To the authors’ knowledge, the overall performance of PS1, PS2, and PS3 ranks among the best published in the literature for K- and Ka-band four-way power splitters. Full article
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