Results 11 to 20 of about 5,179 (216)
Fixed and reconfigurable multiband antennas [PDF]
, 2011 This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel UniversityWith the current scenario of development of antennas in the wireless communication field, the need of compact multiband, multifunctional and cost effective ...
Abutarboush, Hattan F
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Planar Inverted-F Antennas (PIFA) for multiband wireless applications [PDF]
, 2010 This is a post-print version of the article - Copyright @ 2010 IEEEA compact reconfigurable four bands Planar Inverted-F Antenna (PIFA) is presented for Digital Video Broadcasting – Handheld (DVB-H), Universal Mobile Telecommunications System (UMTS ...
AbuTarboush, HF, Nilavalan, R, Peter, T
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Distortion mechanisms in varactor diode-tuned microwave filters [PDF]
, 2006 This paper examines the broadband distortion behavior in flexible filters employing varactor-diode tuning elements. Series- and parallel-resonant varactor-loaded transmission-lines, both commonly used in bandpass and bandstop microwave filters, are ...
Carey-Smith, BE, Warr, PA
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Sensors, 2023 This study proposes a high-temperature superconducting (HTS) bandpass filter with a continuously tunable bandwidth and center frequency. The proposed filter combines several gallium arsenide varactors and a dual-mode resonator (DMR).
Zhaojiang Shang +3 more
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Frequency multipliers on semiconductor diode structures
Tekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2018 Obvious advantages of the millimeter wave technology including a large information capacity, high directivity of radiation, diagnostics and spectroscopy capabilities of different environments, including the methods of electron paramagnetic resonance and ...
M. F. Karushkin
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, 2010 The application of a novel biasing technique to tune frequency selective surfaces (FSS) made of patch elements is described. The methodology follows a recently developed technique where the biasing circuit of an active FSS is etched at the rear of a ...
Parker, Edward A. +3 more
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IEEE Access, 2021 Membrane reflectarray antennas with flexible support structures realize low weight and low stowage volume. However, deformation of the reflectarray membrane generally degrades antenna gain. We propose electrical misalignment compensation for 5.8-GHz-band
Keisuke Omoto +2 more
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Microstrip Tunable Bandpass Filter with the Colinear Resonators
International Journal of Antennas and Propagation, 2013 This paper presents the lumped element circuit and transmission line equivalent circuit for a varactor-tuned bandpass filter. The filter consists of transmission lines, fixed capacitors, and a varactor diode.
Z. P. Wang +3 more
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Design of a continuously tunable reflectarray element for 5G metrology in the k-band [PDF]
Advances in Radio Science, 2020 We introduce a new tunable reflectarray element for an operation frequency of 26 GHz in the k-band. It is shown that a 340∘ continuous tunning range of the reflected wave can be accomplished by using an aperture-coupled patch antenna with only one
T. Harz, T. Kleine-Ostmann, T. Schrader
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Tuning-Range Extension Strategies for Varactor-Based Frequency-Reconfigurable Antennas
IEEE Open Journal of Antennas and Propagation, 2023 Tuning range extension strategies for varactor-based frequency-reconfigurable planar patch antennas are presented. The three tuning range optimization methods described in the paper include co-optimization of antenna dimensions and varactor properties ...
Quoc Hung Dang +3 more
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