Title :
Microstrip line fed slot, slot-coupled patch antennas, and mutual coupling study in array applications
Author :
Chinglung Chen ; Ming-Ju Tsai ; Alexopoulos, N.G.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
Two examples of circularly-polarized slot and slot-coupled patch antennas fed by a microstrip line are designed at 4.8 GHz, a dual slot-coupled circular patch (DSCCP) antenna and an monofilar Archimedean spiral slot (MASS) antenna. The mixed potential integral equation (MPIE) is applied to investigate the behavior of these antennas. Comparing these two antennas, the former offers better radiation efficiency but the latter has a wider VSWR and axial ratio bandwidth. Also the mutual coupling study of the S parameters and radiation pattern is conducted for a two-element dual slot coupled circular patch subarray. It is observed that the axial ratio is greatly influenced by the adjacent element. Only at certain inter-element spacing, a less than 1 dB axial ratio is obtained.
Keywords :
antenna feeds; antenna radiation patterns; electric potential; integral equations; microstrip antenna arrays; slot antenna arrays; spiral antennas; 4.8 GHz; MPIE; S parameters; VSWR; adjacent element; antenna array applications; axial ratio; axial ratio bandwidth; circular patch subarray; circularly polarized slot antennas; dual slot coupled circular patch; interelement spacing; microstrip line fed slot; microstrip line feeder; mixed potential integral equation; monofilar Archimedean spiral slot antenna; mutual coupling; radiation efficiency; radiation pattern; slot coupled patch antennas; Antenna arrays; Antenna feeds; Aperture antennas; Bandwidth; Frequency; Microstrip antenna arrays; Microstrip antennas; Mutual coupling; Patch antennas; Slot antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1996. AP-S. Digest
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-3216-4
DOI :
10.1109/APS.1996.549775
