Title :
Switched Antenna Circuit With Increased Information Bandwidth
Author :
Keller, Steven D. ; Palmer, W. Devereux ; Joines, William T.
Author_Institution :
U.S. Army Res. Lab., Adelphi, MD, USA
fDate :
7/2/1905 12:00:00 AM
Abstract :
An L-band microstrip patch antenna is directly modulated with fast-switching p-i-n diodes over a range of modulation frequencies well beyond the resonant bandwidth of the antenna. The experimental results, in both the time and frequency domains, show that by using this direct modulation technique, a narrowband patch antenna with a -10 -dB reflection coefficient bandwidth of 28 MHz successfully transmits a directly modulated signal with a bandwidth greater than 300 MHz.
Keywords :
frequency modulation; microstrip antenna arrays; p-i-n diodes; L-band microstrip patch antenna; direct modulation technique; information bandwidth; modulation frequencies; narrowband patch antenna; p-i-n diodes; reflection coefficient bandwidth; resonant bandwidth; switched antenna circuit; Amplitude modulation; Bandwidth; Frequency modulation; Patch antennas; Receiving antennas; Computational electromagnetics; direct modulation; p-i-n diode; patch antenna;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2010.2089775
