Title :
A multi-frequency microstrip-fed annular slot antenna
Author :
Hooman Tehrani ; Kai Chang
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
A single feed multi-frequency annular slot antenna is analyzed with an integral equation program and experimentally. Experimental impedance bandwidths of the first three operating frequencies range from 6.6 to 10.8 percent. At these frequencies, the antenna displays a broadside bi-directional radiation pattern, with directivity on the order of 5 dB. Tuning the antenna is examined by changing the width of the slot ring and adjusting the open-circuited microstrip feed line.
Keywords :
antenna feeds; antenna radiation patterns; directive antennas; integral equations; multifrequency antennas; slot antennas; tuning; 3.5 GHz; 4.5 GHz; 6.37 GHz; antenna tuning; broadside bi-directional radiation pattern; directivity; impedance bandwidths; integral equation; microstrip-fed annular slot antenna; multi-frequency annular slot antenna; open-circuited microstrip feed line; single feed; slot ring width; Antenna feeds; Antenna radiation patterns; Bandwidth; Bidirectional control; Displays; Frequency; Impedance; Integral equations; Microstrip antennas; Slot antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2000. IEEE
Conference_Location :
Salt Lake City, UT, USA
Print_ISBN :
0-7803-6369-8
DOI :
10.1109/APS.2000.875259
