Results 201 to 210 of about 8,546 (255)

Frequency-Reconfigurable Antenna Using Metasurface

IEEE Transactions on Antennas and Propagation, 2014
A frequency-reconfigurable antenna designed using metasurface (MS) to operate at around 5 GHz is proposed and studied. The frequency-reconfigurable metasurfaced (FRMS) antenna is composed of a simple circular patch antenna and a circular MS with the same diameter of 40 mm (0.67 λ) and implemented using planar technology.
T I Yuk
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Frequency reconfigurable active antenna

2014 International Symposium on Antennas and Propagation Conference Proceedings, 2014
The objective is to design a frequency reconfigurable active antenna which involves the integration of active device such as FET with a passive structure. Here the dual port dual band antenna is independently designed and later connected to one port amplifier using matching network.
Sweta, Agarwal, Ananjan, Basu, Mahesh, P. Abegaonkar, S.K., Koul   +3 more
openaire   +1 more source

Frequency Reconfigurable Miniaturised Slot Antenna

2019 10th International Conference on Computing, Communication and Networking Technologies (ICCCNT), 2019
This communication presents a simple microstrip fed slot antenna loaded with rectangular dielectric resonator which can be configured for multiple frequencies for wireless communication systems. The proposed antenna provides 22.72% to 50.34% miniaturization for various positions of dielectric resonator on the slot covering 1.42GHz to 2.21GHz with good ...
Khan Masood Parvez, Enamul Khan, SK. Moinul Haque   +2 more
openaire   +1 more source

A reconfigurable stepped frequency GPR (GPR-R)

2011 IEEE International Geoscience and Remote Sensing Symposium, 2011
Ground Penetrating Radars are a unique and well known tool for soil investigation. In order to improve its penetration depth and/or its resolution limits, in the past several radar designs, based on the so called Continuous Wave-Stepped Frequency technique have been proposed. However, the resulting design was often a quite complex equipment.
PARRINI, FILIPPO, R. Persico, PIERACCINI, MASSIMILIANO, A. Spinetti, MACALUSO, GIOVANNI, FRATINI, MATTEO, DEI, DEVIS, G. Manacorda   +7 more
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A reconfigurable high-frequency phase-locked loop

Proceedings of the 20th IEEE Instrumentation Technology Conference (Cat. No.03CH37412), 2004
Reconfigurable phase-locked loops (PLLs) present the advantage of fast-frequency acquisition combined with narrow-noise bandwidth, since their parameters can be dynamically adjusted. High-frequency PLLs are generally implemented by means of analog circuits which are not easily reconfigured during operation.
Fernando Rangel de Sousa, Bernard Huyart
openaire   +1 more source

Frequency-Reconfigurable Circularly Polarized Omnidirectional Antenna

IEEE Transactions on Antennas and Propagation, 2022
A concept of frequency-reconfigurable circularly polarized (CP) antenna with omnidirectional radiation characteristics is introduced. The antenna is based on a center-fed circular patch with shorting vias, surrounded by three arc-shaped arms. Omnidirectional CP is attained through its two orthogonal radiators with a quadrature phase difference.
Ken Paramayudha, Shengjian Jammy Chen, Withawat Withayachumnankul, Christophe Fumeaux   +3 more
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Frequency-Reconfigurable Monopole Antennas

IEEE Transactions on Antennas and Propagation, 2012
A novel coplanar-waveguide (CPW) bandpass filter using short-circuit slotlines and varactor diodes is introduced. This bandpass filter, when integrated with a CPW wideband antenna, produces frequency agility with a wideband mode and a continuous narrowband mode.
Abubakar Tariq, Hooshang Ghafouri-Shiraz
openaire   +1 more source

A frequency reconfigurable slot antenna

2007 International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2007
This paper proposed a frequency reconfigurable CPW center-fed slot antenna. Four pin-diodes are utilized to switch the length of the slot. By tuning the different pairs of diodes on or off, three resonant frequency bands can be obtained. The simulated and measured results validate this concept.
Yibo Chen, Xufeng Liu, Yongchang Jiao, Fushun Zhang   +3 more
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Frequency reconfigurable antennas: A review

2017 International Conference on Signal Processing and Communication (ICSPC), 2017
The recent trends in wireless communication systems show that the demand for devices able to operate within more frequency bands has been inflated considerably. This has enhanced the evolution of antennas that are able to be operated at multiple frequency bands.
Ros Marie C Cleetus, G. Josemin Bala
openaire   +1 more source