DocumentCode
1028261
Title
Polarisation-agile active patch antenna
Author
Haskins, P.M. ; Hall, Peter S. ; Dahele, J.S.
Author_Institution
Sch. of Electr. Eng. & Sci., R. Mil. Coll. of Sci., Shrivenham, UK
Volume
30
Issue
2
fYear
1994
fDate
1/20/1994 12:00:00 AM
Firstpage
98
Lastpage
99
Abstract
A polarisation-agile active antenna has been constructed and tested. The radiation can be selected to be circularly polarised in either sense, or linearly polarised in the vertical, horizontal or either diagonal plane. The antenna consists of two varactor diode loaded active patches using npn bipolar transistors in the common base configuration as sources, and with the patch axes at right angles to each other. The two oscillators are locked to an external source, and the phase from each patch element is controlled by varying the diode bias voltage. By appropriate combination of the phase relationships, the various polarisations are produced.
Keywords
active antennas; bipolar transistors; electromagnetic wave polarisation; microstrip antennas; varactors; circularly polarised radiation; common base configuration; diode bias voltage; linearly polarised radiation; npn bipolar transistors; patch antenna; patch axes; phase relationships; polarisation-agile active antenna; varactor diode;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19940072
Filename
265326
Link To Document