NDLI: A beam-scanning and polarization-agile antenna array using mutually coupled oscillating doublers

Content Provider	IEEE Xplore Digital Library
Author	Shih-Chieh Yen Tah-Hsiung Chu
Copyright Year	1963
Abstract	In this paper, a two-dimensional mutually coupled oscillator array is studied for the application of a beam-scanning and polarization-agile antenna array. In the design of antenna array, a two-dimensional oscillator array is implemented in x-y plane, the polarization agility is provided by one dimension (or y-direction) and the other dimension (or x-direction) is for beam scanning. By properly tuning the free-running frequencies of these oscillators, the array radiation direction can be scanned at the selected polarization states including linearly polarized, left-hand and right-hand circularly polarized states. The maximal phase difference of /spl plusmn/180/spl deg/ between coupled oscillating signals is acquired by utilizing their second-harmonic signals. This then gives well-defined phase differences among oscillators for beam scanning in addition to the required quadrature phase difference for circular polarization. The performances of polarization agility and beam scanning for a four-element antenna array are verified experimentally and shown to have the potential for adaptive antenna array applications.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	4051
Ending Page	4057
Page Count	7
File Size	736265
File Format	PDF
ISSN	0018926X
Volume Number	53
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Polarization Antenna arrays Mutual coupling Optical coupling Phased arrays Frequency Injection-locked oscillators Adaptive arrays Phase shifters Bandwidth polarization control Coupled oscillator systems injection locked oscillators phased arrays
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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