Title :
Active polarization-agile microstrip antennas
Author :
Haskins, P.M. ; Dahele, S.S.
Author_Institution :
Sch. of Eng. & Appl. Sci., Cranfield Univ., Shrivenham, UK
Abstract :
The method of synchronising an oscillator by means of injection-locking, and controlling the radiated phase by varying the frequency-controlling parameter as described by Kurwokawa (1973) and Adler (1973) has been the subject of much interest particularly in microstrip beam steering arrays. Here we describe a polarization-agile antenna element employing this method. This antenna is capable of radiating both left and right hand circular polarization and linear polarization in any one of four planes and these polarization states are selected by varying transistor bias voltages.
Keywords :
active antenna arrays; antenna accessories; antenna radiation patterns; electromagnetic wave polarisation; injection locked oscillators; microstrip antenna arrays; synchronisation; 2.525 to 2.550 GHz; active polarization agile microstrip antennas; frequency-controlling parameter; injection-locking; left hand circular polarization; linear polarization; microstrip beam steering arrays; oscillator; polarization states; radiated phase; right hand circular polarization; transistor bias voltages; Educational institutions; Frequency; Injection-locked oscillators; Linear antenna arrays; Microstrip antenna arrays; Microstrip antennas; Phased arrays; Polarization; Power generation; Power measurement;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1997. IEEE., 1997 Digest
Conference_Location :
Montreal, Quebec, Canada
Print_ISBN :
0-7803-4178-3
DOI :
10.1109/APS.1997.630062
