Title :
Gain enhancement microstrip antenna with slots loaded in the ground plane
Author :
Kuo, Jieh-Sen ; Hsieh, Gui-Bin ; Lai, Ching-An
Author_Institution :
Dept. of Electr. Eng., Chinese Mil. Acad., Feng-Shan, Taiwan
Abstract :
The article presents a novel circular polarization (CP) design of a single-feed equilateral-triangular microstrip antenna to achieve enhanced antenna gain. This technique is obtained by placing three triangular slots at locations below the equilateral-triangular radiating patch in the ground plane. By adjusting one of the triangular slot´s side lengths to be slightly longer than that of the others, two orthogonal near-degenerate resonant modes for CP radiation can be excited. The measured antenna gain in this study can be easily increased by 3.3 dBi as compared to the same height, operating frequency and radiating patch shape of a regular equilateral-triangular microstrip antenna without triangular slots in the ground plane. A prototype antenna is fabricated for experimental evaluation. Simulated and measured results are presented.
Keywords :
antenna feeds; antenna radiation patterns; electromagnetic wave polarisation; gain measurement; microstrip antennas; slot antennas; CP radiation; circular polarization; equilateral-triangular microstrip antenna; equilateral-triangular radiating patch; gain enhancement; ground plane; measured antenna gain; orthogonal near-degenerate resonant modes; single-feed microstrip antenna; triangular slots; Antenna measurements; Frequency measurement; Gain measurement; Loaded antennas; Microstrip antennas; Polarization; Prototypes; Resonance; Shape measurement; Slot antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2002. IEEE
Print_ISBN :
0-7803-7330-8
DOI :
10.1109/APS.2002.1016337
