NDLI: Analysis and Design of a Differentially-Fed Frequency Agile Microstrip Patch Antenna

Content Provider	IEEE Xplore Digital Library
Author	Hum, S.V. Hui Yuan Xiong
Copyright Year	1963
Abstract	The design of a frequency agile microstrip patch antenna is described that is readily interfaced with differential RF transceivers. By integrating three pairs of varactor diodes with the patch antenna, and tuning them in unison, frequency tuning ratios approaching 2 are possible with the design. This is made possible by the intrinsically broadband nature of the differential feeding scheme used. An intuitive equivalent circuit for predicting the port characteristics of the antenna is presented. Moreover, the circuit is shown to be highly accurate in predicting losses produced by the varactor diodes and the consequent radiation efficiency of the antenna. To the best of the authors' knowledge, this is the first time a detailed analysis of the effect of varactor diode losses has been undertaken in frequency agile antennas using an equivalent circuit. The equivalent circuit model is subsequently validated using full-wave simulations and experimental measurements of an antenna operating in the 2-4 GHz range.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	3122
Ending Page	3130
Page Count	9
File Size	557469
File Format	PDF
ISSN	0018926X
Volume Number	58
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Microstrip antennas Patch antennas Varactors Diodes Equivalent circuits Circuit optimization Tuning Radio frequency Transceivers Circuit simulation varactors Frequency agile antennas microstrip antennas multifrequency antennas reconfigurable antennas
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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