Proceedings ArticleDOI
Frequency reconfigurable quasi-Yagi dipole antenna
Yong Cai,Y. Jay Guo,Pei-Yuan Qin,Andrew R. Weily +3 more
- pp 1-4
TLDR
In this article, a frequency reconfigurable quasi-Yagi dipole antenna with varactor diodes is presented, where the effective electrical lengths of the driver and director dipoles are varied by changing the biasing voltages.Abstract:
A frequency reconfigurable quasi-Yagi dipole antenna is presented in this paper. Simulation results show that a 35% continuously tuning impedance bandwidth, from 1.85 to 2.5GHz, is obtained. Loaded with varactor diodes, the effective electrical lengths of the driver and director dipoles are varied by changing the biasing voltages. The length adjustable director allows the endfire pattern with relatively high gain being maintained over each tuning sub-band. Across the tuning bandwidth, the predicted gain variation is from 5.8dBi to 7.9dBi. The H-plane cross-polarization level is below −17dB while this value is below −32dB in the E-plane. The front-to-back ratio is better than 12dB.read more
Citations
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Journal ArticleDOI
Frequency-Reconfigurable Microstrip Patch-Slot Antenna
Huda A. Majid,Mohamad Kamal A. Rahim,Mohamad Rijal Hamid,Noor Asniza Murad,Mohd Faizal Ismail +4 more
TL;DR: In this paper, a frequency reconfigurable microstrip patch switchable to slot antenna is proposed, which is capable of frequency switching at nine different frequency bands between 1.98 and 3.59 GHz.
Journal ArticleDOI
Frequency-Reconfigurable Antenna Using Metasurface
TL;DR: In this paper, a frequency-reconfigurable antenna designed using metasurface (MS) to operate at around 5 GHz is proposed and studied. But the MS placed atop the patch antenna behaves like a dielectric substrate and rotating the MS changes the equivalent relative permittivity of the substrate and hence the operating frequency of the FRMS antenna.
Journal ArticleDOI
A Reconfigurable Microstrip Antenna With Radiation Pattern Selectivity and Polarization Diversity
TL;DR: In this article, a reconfigurable microstrip antenna with radiation pattern selectivity and polarization diversity is presented, where a four-way power divider made by three Wilkinson power dividers and interconnected with switches (currently copper strips for proof of concept) is designed to feed this antenna.
Journal ArticleDOI
A Frequency Reconfigurable Printed Yagi-Uda Dipole Antenna for Cognitive Radio Applications
TL;DR: In this article, a frequency reconfigurable printed Yagi-Uda antenna is presented for cognitive radio applications, where a 46% continuous frequency tuning bandwidth is obtained by loading the driver dipole arms and four directors with varactor diodes.
Journal ArticleDOI
Frequency-Reconfigurable Pixel Slot Antenna
TL;DR: In this article, a pixel slot antenna with a canonical switched slot element concatenated together to form various radiating structures is proposed and studied in a frequency-reconfigurable antenna structure.
References
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IEEE 802.22: An Introduction to the First Wireless Standard based on Cognitive Radios
TL;DR: A detailed overview of the IEEE 802.22 draft specification, its architecture, requirements, applications, and coexistence considerations not only form the basis for the definition of this groundbreaking wireless air interface standard, but will also serve as foundation for future research in the promising area of CRs.
Journal ArticleDOI
A new quasi-Yagi antenna for planar active antenna arrays
TL;DR: In this article, a broadband planar antenna based on the classic Yagi-Uda dipole antenna is presented, and its usefulness as an array antenna is explored, achieving a measured 48% frequency bandwidth for voltage standing-wave ratio <2, better than a 12dB front-to-back ratio, smaller than -15 dB cross polarization, and 3-5-dBi absolute gain.
Journal ArticleDOI
Frequency and beam reconfigurable antenna using photoconducting switches
TL;DR: In this paper, a wideband coplanar waveguide was used to feed the balanced printed dipole antenna, where two silicon photo switches were placed on small gaps in both dipole arms equidistant from the center feed.
Journal ArticleDOI
Design, fabrication, and measurements of an RF-MEMS-based self-similar reconfigurable antenna
Dimitris E. Anagnostou,G. Zheng,Michael T. Chryssomallis,James Lyke,George E. Ponchak,John Papapolymerou,Christos G. Christodoulou +6 more
TL;DR: This work, ohmic contact cantilever RF-MEMS switches are integrated with self-similar planar antennas to provide a reconfigurable antenna system that radiates similar patterns over a wide range of frequencies.
Journal ArticleDOI
A novel radiation pattern and frequency reconfigurable single turn square spiral microstrip antenna
TL;DR: In this paper, the authors present a novel pattern and frequency reconfigurable microstrip antenna that uses switched connections, which provides a re-directed radiation pattern while maintaining a common operating impedance bandwidth with the baseline configuration.