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This study presents a novel three-way unequal filtering power divider/combiner, addressing challenges in unequal power distribution while incorporating filtering functions in communication systems. Wilkinson power divider (WPD) is the…

Systems and Control · Electrical Eng. & Systems 2025-04-08 Augustine O. Nwajana , Mosammat Rokaiya Akter , Muhammad Asfar Saeed

In this paper, a rectangular-shaped power divider has been presented operating at 27.9 GHz. The power divider has achieved acceptable results for important parameters such as S11, S12, S21, and S22. The substrate employed for the power…

Systems and Control · Electrical Eng. & Systems 2025-05-08 Muhammad Asfar Saeed , Augustine O. Nwajana , Muneeb Ahmad

This paper presents a global framework analysis of a microstrip antenna design circularly polarized with an operating frequency of 5.80 GHz and a bandwidth of at least 500 MHz. We evaluate the optimal antenna parameters to design…

Signal Processing · Electrical Eng. & Systems 2019-01-17 Elyes Balti , Brian K. Johnson

This article presents an approach to control the operating frequency and fractional bandwidth (FBW) of miniature acoustic filters in thin-film lithium niobate (TFLN). More specifically, we used first-order antisymmetric (A1) mode…

Signal Processing · Electrical Eng. & Systems 2026-04-14 Taran Anusorn , Omar Barrera , Jack Kramer , Ian Anderson , Ziqian Yao , Vakhtang Chulukhadze , Ruochen Lu

A polarization-independent reconfigurable frequency selective rasorber (FSR)/absorber with low insertion loss based on diodes is proposed in this paper. The presented structure consists of a lossy layer based on square loops and a bandpass…

Applied Physics · Physics 2020-08-11 Jing Yuan , Xiangkun Kong , Xuemeng Wang , Shunliu Jiang , Lingqi Kong

In this paper, a compact microstrip forward broadside coupler (MFBC) with high coupling level is proposed in the frequency band of 3.5-3.8 GHz. The coupler is composed of two parallel pixelated transmission lines. To validate the…

Systems and Control · Electrical Eng. & Systems 2024-08-28 Kourosh Parsaei , Rasool Keshavarz , Rashid Mirzavand Boroujeni , Negin Shariati

A new method is discussed for the systematic synthesis, design and performance optimization of varactor-based parametric frequency dividers (PFDs) exhibiting an ultra-low power threshold ($P_{th}$). For the first time, it is analytically…

Signal Processing · Electrical Eng. & Systems 2020-08-26 Hussein M. E. Hussein , Mahmoud A. A. Ibrahim , Giuseppe Michetti , Matteo Rinaldi , Marvin Onabajo , Cristian Cassella

In this paper, we combine the design of band-pass frequency selective surfaces (FSSs) with polarization converters to realize a broadband frequency-selective polarization converter (FSPC) with lowbackward scattering, which consists of the…

Applied Physics · Physics 2019-11-25 Lingling Wang , Shaobin Liu , Xiangkun Kong , Haifeng Zhang , Yongdiao Wen , Qiming Yu

In this letter, a single-layer dual-band flexible conformal filtering endfire antenna is presented. The proposed antenna is based on two co-designed folded dipoles (FDs) working at two frequencies, where the lower-frequency FD acts as a…

Systems and Control · Electrical Eng. & Systems 2025-09-26 Fan Qin , Runkai Song , Chao Gu , Wenchi Cheng , Steven Gao

The recent proliferation of personal wireless communication devices is driving the need for multi-band frequency selective components including multiplexers and dual-band filters. This paper presents a simple technique for transforming a…

Systems and Control · Electrical Eng. & Systems 2024-05-13 Chandramouli H. Mahadevaswamy , Anup Raju Vasistha , Augustine O. Nwajana

In this work, a novel energy-recycling single-antenna full-duplex (FD) radio is designed, in which a new 3-port element including a power divider and an energy harvester is added between the circulator and the receiver (RX) chain. The…

Information Theory · Computer Science 2016-05-19 Marco Maso , Chen-Feng Liu , Chia-Han Lee , Tony Q. S. Quek , Leonardo S. Cardoso

Fast and high-fidelity qubit readout requires strong coupling between the readout resonator and the feedline. However, such coupling unavoidably enhances qubit decay through the Purcell effect. We present a four-pole broadband Purcell…

This article presents a fully 3D-printed wideband metasurface folded reflectarray antenna (MFRA) operating in the millimeter-wave n257 band. The proposed MFRA integrates a novel polarization-rotating reflective metasurface (RMS), a compact…

Signal Processing · Electrical Eng. & Systems 2026-03-19 Evangelos Vassos , Thomas Whittaker , Abdul Jabbar , Aakash Bansal , Will Whittow

This article describes the design methodology to achieve reflective diode-based parametric frequency selective limiters (pFSLs) with low power thresholds ($P_{th}$) and sub-dB insertion-loss values ($IL^{s.s}$) for driving power levels…

Systems and Control · Electrical Eng. & Systems 2021-06-16 Hussein M. E. Hussein , Mahmoud A. A. Ibrahim , Matteo Rinaldi , Marvin Onabajo , Cristian Cassella

In this paper, a switchable 3-D frequency selective rasorber (FSR) with wide absorption bands without lumped components or commercial magnetic absorbers is presented and investigated. The absorption path is constructed by embedding a hybrid…

Applied Physics · Physics 2023-03-06 Xiangkun Kong , Xuemeng Wang , Xin Jin , Weihao Lin , Lingqi Kong , Shunliu Jiang , Lei Xing

Integrated optical power splitter is one of the fundamental building blocks in photonic integrated circuits (PIC). Conventional multimode interferometer based power splitter is widely used as it has reasonable footprint and is easy to…

Optics · Physics 2017-04-05 Ke Xu , Lu Liu , Xiang Wen , Wenzhao Sun , Nan Zhang , Ningbo Yi , Shang Sun , Shumin Xiao , Qinghai Song

A stepped-impedance low-pass filter with integrated hollow waveguide absorbers is presented. The filter combines low insertion loss in the passband with strong attenuation at high frequencies, making it well suited for superconducting…

Quantum Physics · Physics 2026-01-08 Linus Andersson , Benjamin Olsson , Simone Gasparinetti , Robert Rehammar

The multilayer structure is a promising technique used to minimize the size of planar microstrip filters. In the flexible design and incorporation of other microwave components, multilayer band-pass filter results in better and enhanced…

Signal Processing · Electrical Eng. & Systems 2021-10-11 Qazwan Abdullah , Ömer Aydoğdu , Adeeb Salh , Nabil Farah , Md Hairul Nizam Talib , Taha Sadeq , Mohammed A. A. Al-Mekhalfi , Abdu Saif

Harmonic generation during radio frequency (RF)-dc conversion causes performance degradation of a microwave rectifying circuit. To suppress and recycle the harmonic power, this letter proposes a novel compact dual-band resonator (DBR) based…

Applied Physics · Physics 2026-01-06 Pengde Wu , Hao Wu , Yi-Dan Chen , Zhi Hua Ren , Yuhua Cheng , Changjun Liu

In this paper, a dual polarized, dual band, low profile, embedded bias network, and compact tunable varactor band pass frequency selective surface (FSS) is designed with a wide tuning range. The proposed FSS is composed of two metallic…

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