DocumentCode :
1016779
Title :
Frequency scanning microstrip antennas
Author :
Danielsen, Magnus ; Jorgensen, Rolf
Author_Institution :
Technical University of Denmark, Lyngby, Denmark
Volume :
27
Issue :
2
fYear :
1979
fDate :
3/1/1979 12:00:00 AM
Firstpage :
146
Lastpage :
150
Abstract :
The principles of using radiating microstrip resonators as elements in a frequency scanning antenna array are described. The resonators are cascade-coupled. This gives a scan of the main lobe due to the phase-shift in the resonator in addition to that created by the transmission line phase-shift. Experimental results in 
-band, in good agreement with the theory, show that it is possible to scan the main lobe an angle of 
by a variation of the frequency 
MHz, and where the 3 dB beamwidth is less than 
. The directivity was 14.7 dB, while the gain was 8.1 dB. The efficiency might be improved by a trade-off between the efficiency and the scanning angle, or by using a better amplitude distribution.
-band, in good agreement with the theory, show that it is possible to scan the main lobe an angle of by a variation of the frequency MHz, and where the 3 dB beamwidth is less than . The directivity was 14.7 dB, while the gain was 8.1 dB. The efficiency might be improved by a trade-off between the efficiency and the scanning angle, or by using a better amplitude distribution.Keywords :
Frequency-scanned arrays; Microstrip antennas; Circuits; Electromagnetics; Frequency; Microstrip antenna arrays; Microstrip antennas; Microstrip resonators; Permittivity; Power transmission lines; Transformers; Transmission line theory;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1979.1142049
Filename :
1142049
Link To Document :
