Title :
Modified annular-ring patch antennas
Author_Institution :
Dept. of Electron. Eng., Cheng-Shiu Univ., Kaohsiung, Taiwan
Abstract :
A new technique to enhance the impedance bandwidth visibly to be about twice as large as that of a probe-fed annular-ring microstrip antenna in the TM/sub 12/ mode by using a two-notch sector in the annular-ring patch is proposed. The obtained bandwidth is improved to be about 6%, and this modified structure makes it possible to use a 50 /spl Omega/ microstrip line as a feed line.
Keywords :
antenna feeds; electromagnetic wave polarisation; impedance matching; microstrip antennas; microstrip lines; 50 ohm; broadband impedance matching; feed line; impedance bandwidth; linearly polarized antenna; microstrip line; modified annular-ring patch antennas; probe-fed annular-ring microstrip antenna; radiation pattern; two-notch sector; Antennas and propagation; Bandwidth; Broadband antennas; Business; Educational institutions; Feeds; Microstrip antennas; Patch antennas; Resonance; Surface impedance;
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.1997.631681
