NDLI: Microstrip antennas with frequency agility and polarization diversity

Content Provider	IEEE Xplore Digital Library
Author	Schaubert, D. Farrar, F. Sindoris, A. Hayes, S.
Copyright Year	1963
Abstract	A technique is investigated for controlling the operating frequency and polarization of microstrip antennas. The control is achieved by placing shorting posts at appropriate locations within the antenna's boundaries. By changing the number and locations of the posts, the operating frequency can be tuned over a 1.5-to-1 range, and the polarization can be changed from horizontal to vertical, right-hand circular, or left-hand circular. All of these changes are obtained without significantly altering the input impedance or radiation patterns of the antenna and without increasing the complexity of the external microwave feed network. The frequency and polarization can be electronically controlled by using microwave switching diodes for the shorting posts. Antennas that have two feeds and operate simultaneously in two orthogonal polarizations have been constructed with the capability to switch between linear and circular polarization. Also, a thin frequency-scanned array has been built with the frequency-agile microstrip elements.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	118
Ending Page	123
Page Count	6
File Size	534888
File Format	PDF
ISSN	0018926X
Volume Number	29
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1981-01-01
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 Frequency diversity Polarization Microstrip antenna arrays Antenna feeds Switches Impedance Antenna radiation patterns Microwave antennas Diodes
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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