Title :
Dual-frequency annular-ring slot antennas fed by CPW feed and microstrip line feed
Author_Institution :
Dept. of Electron. Eng., Cheng Shiu Univ., Taiwan
Abstract :
The dual-frequency properties of a dual annular-ring slot antenna fed by coplanar waveguide (CPW) and microstrip feedline are presented and experimentally studied. The proposed antenna is constructed by dual concentric annular-ring slots fabricated on FR4 substrate with single feed. The proposed slot antennas have good impedance matching for the two operating frequencies with a frequency ratio ranging about 1.34∼3.11 and 1.4∼1.74 can be achieved for CPW-fed and microstrip-fed.
Keywords :
antenna feeds; antenna radiation patterns; coplanar waveguides; impedance matching; loop antennas; microstrip antennas; microstrip lines; multifrequency antennas; slot antennas; CPW feed; FR4 substrate; coplanar waveguide; dual concentric slot; dual-frequency annular-ring slot antennas; impedance matching; microstrip line feed; Antenna feeds; Antennas and propagation; Coplanar waveguides; Impedance matching; Microstrip antennas; Polarization; Prototypes; Resonant frequency; Slot antennas; Tuning;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2004.838799
