Title :
A dual-band monopolar patch antenna with a rectangular-loop feed
Author :
Lau, K.L. ; Luk, K.M.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
Abstract :
The characteristics of a rectangular-loops fed patch antenna with radiation patterns similar to a 2/spl times/1 monopole array are presented. The loop is equivalent to an L-probe with the end shorted to the ground. The proposed antenna consists of two patches which are excited by two rectangular-loops respectively. It is designed to operate at both GSM900 and GSM1800 bands, with centre frequencies of 870.75 MHz and 1773 MHz respectively. The distance between each patch and the ground plane is 0.1 free space wavelength at their resonant frequency. Foam is used as the dielectric substrate. Each patch radiates with a null in the direction normal to the patch, and an elliptical pattern on the horizontal plane. This antenna can be used for indoor wireless communication systems.
Keywords :
UHF antennas; antenna feeds; antenna radiation patterns; indoor radio; microstrip antennas; multifrequency antennas; 1773 MHz; 870.75 MHz; GSM1800; GSM900; dual-band monopolar patch antenna; foam dielectric substrate; horizontal plane elliptical pattern; indoor wireless communication systems; rectangular-loop feed; shorted L-probe; Antenna arrays; Antenna radiation patterns; Bandwidth; Dual band; Feeds; Frequency; Impedance; Patch antennas; Resonance; Wireless communication;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
DOI :
10.1109/APS.2003.1220143
