Results 31 to 40 of about 543 (185)
Miniaturized low-profile filtering omnidirectional antenna design
Dianzi Jishu YingyongA miniaturized omnidirectional microstrip filter antenna is designed. The antenna is composed of a bandpass filter and a microstrip antenna, which share a ground plane to reduce the size and are connected by gap coupling. The bandpass filter is etched at
Wang Lili +3 more
doaj +1 more source
Microstrip Diplexers With Double-Stub Bandpass Filters
, 2011 This paper presents a microstrip diplexer using two Double-Stub Band-Pass Filters (DS-BPFs), composed of several double-stubs connected to a main microstrip line. Each DS-BPF has a null at the center frequency of the other. Therefore, these types of filters are suitable for diplexers with two near frequencies.
Khalaj-Amirhosseini, M. +3 more
openaire +3 more sources
Spoof Surface Plasmon Polaritons in Terahertz Integrated Circuits
Advanced Photonics Research, Volume 7, Issue 5, May 2026.Terahertz integrated circuits (THz ICs) face challenges from wavelength‐scale dimensions and parasitic effects. Spoof surface plasmon polaritons (SSPPs) provide strong confinement and enhanced near fields, enabling novel transmission and modulation mechanisms.
Xuanru Zhang, Ze Kai Wang, Tie Jun Cui
wiley +1 more source
Taxonomy of IMT Interference on Aeronautical Systems
Radio Science, Volume 61, Issue 4, April 2026.Abstract The rapid deployment of 5G and future 6G networks has raised concerns about interference with critical aeronautical systems, particularly radio altimeters and Wireless Avionics Intra‐Communications (WAIC). This paper offers a comprehensive taxonomy of the 5G/6G signal interference mechanisms, operational impacts, and mitigation strategies in ...
Valéria C. M. N. Leite, Alison Moraes
wiley +1 more source
A 0.85–1.25 GHz On‐Chip Tunable Bandpass Filter Using Cascaded Parametric Mixing in GaAs MMIC
Electronics Letters, Volume 62, Issue 1, January/December 2026.This paper demonstrates the first fully integrated GaAs MMIC implementation of a parametric frequency‐translated bandpass filter using cascaded up‐ and down‐conversion stages around a fixed idler resonance. The proposed architecture enables continuous tuning from 0.85 to 1.25 GHz with near‐unity gain, <3 dB insertion loss and >30 dB out‐of‐band ...
Sean C. Chen +3 more
wiley +1 more source
Balanced Diplexer With Widely Separated Differential Passbands Using Input Embedded Resonators
Electronics Letters, Volume 62, Issue 1, January/December 2026.This article presents a balanced‐to‐balanced diplexer using embedded resonators as a common dual‐band input stage, enabling independently tuneable and widely separated differential‐mode passbands without increasing the number of resonators in the output branches.
Jose Luis Medrán del Río +3 more
wiley +1 more source
Frequency-Tunable and Pattern Diversity Antennas for Cognitive Radio Applications
International Journal of Antennas and Propagation, 2014 Frequency-tunable microstrip antennas, for cognitive radio applications, are proposed herein. The approach is based on tuning the operating frequency of a bandpass filter that is incorporated into a wideband antenna.
A. H. Ramadan +4 more
doaj +1 more source
A New Ultracompact Narrow Bandpass Microstrip Filter Using Double-Negative Quasiplanar Cells
International Journal of Antennas and Propagation, 2020 This paper presents a novel ultracompact narrow bandpass filter with high selectivity. The proposed filter is composed of cascading two basic cells. Each cell is basically a microstrip line loaded with a quasiplanar resonator and series gaps which can be
Mohammad Reza Khawary +3 more
doaj +1 more source
Adapting Mixer Metamaterials With a Metasurface Absorber
IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.This study investigates mixer metasurfaces, which use a top frequency‐selective surface (FSS) mixer and a transmission line local oscillator (LO) layer, to optimise the upconversion of signals. Experimental and simulated results detail how input signals (e.g., 2.1–4.45 GHz) on the LO layer switch diodes on the mixer layer, and the structure is ...
Douglas A. Bowe +2 more
wiley +1 more source
Tunable Filtenna With DGS Loaded Resonators for a Cognitive Radio System Based on an SDR Transceiver
IEEE Access, 2022 This paper introduces the design of a filtenna for cognitive radio systems. Four varactor diodes, which are inserted in the bandpass filter, are used to achieve the desired tunability.
Ahmed A. Ibrahim +4 more
doaj +1 more source