Title :
Wideband microstrip patch antenna on a thick substrate
Author_Institution :
Bradley Dept. of Electr. & Comput. Eng., Virginia Tech, Blacksburg, VA
Abstract :
There are various methods to increase the bandwidth of a microstrip patch antenna. One of the most common methods used to increase the bandwidth of a microstrip patch antenna is to increase the substrate thickness. This method allows circular polarization simply by exciting two orthogonal modes of the patch with 90deg out of phase signals. The feed reactance usually is very small in comparison to the radiation resistance for thin substrates. However, increasing the substrate thickness will increase the feed reactance. This paper presents a novel method for controlling the feed reactance by introducing a series distributed capacitor into the patch structure.
Keywords :
antenna feeds; broadband antennas; capacitors; microstrip antennas; circular polarization; distributed capacitor; feed reactance; orthogonal modes; radiation resistance; thick substrate; thin substrates; wideband microstrip patch antenna; Bandwidth; Broadband antennas; Capacitors; Dielectric losses; Dielectric substrates; Feeds; Inductors; Microstrip antennas; Patch antennas; Probes;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2041-4
Electronic_ISBN :
978-1-4244-2042-1
DOI :
10.1109/APS.2008.4619868
