Title :
Broadband multi-layered coplanar patch antenna
Author :
Tong, K.F. ; Li, K. ; Matsui, T. ; Izutsu, M.
Author_Institution :
Commun. Res. Lab., Tokyo, Japan
Abstract :
In this paper, we present a new type of broadband coplanar patch antenna. A multilayered structure was used to increase the bandwidth of the coplanar patch antenna (CPA). An additional ground plane was inserted under the coplanar waveguide (CPW) feed line, which reduces the ratio of center strip line to the total width of the CPW (sf/(sf+2wf)) and the dispersion of the feed line. An antenna operating at 10 GHz was designed. The measured impedance bandwidth (return loss < -10 dB) of the antenna was 9%. Stable radiation patterns within the pass band were observed; maximum gain of 8.8 dBi at 10.2 GHz was measured. The cross-polarization level of the antenna was -15dB.
Keywords :
antenna feeds; antenna radiation patterns; broadband antennas; coplanar waveguides; electric impedance measurement; microstrip antennas; 10 GHz; 10.2 GHz; 8.8 dB; CPA; CPW feed line; broadband patch antenna; coplanar patch antenna; coplanar waveguide; cross-polarization level; ground plane; measured impedance bandwidth; multilayered patch antenna; stable radiation patterns; Antenna measurements; Antenna radiation patterns; Bandwidth; Coplanar waveguides; Feeds; Gain measurement; Impedance measurement; Loss measurement; Patch antennas; Planar waveguides;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2002. IEEE
Print_ISBN :
0-7803-7330-8
DOI :
10.1109/APS.2002.1016412
