Title :
Circularly Polarized Dielectric Resonator Antenna Fed by Off-Centered Microstrip Line for 2.4-GHz ISM Band Applications
Author :
Chun-Cheng Lin ; Jwo-Shiun Sun
Author_Institution :
Dept. of Mathematic & Phys. Sci., R.O.C. Air Force Acad., Kaohsiung, Taiwan
Abstract :
A special feeding technique of an off-centered microstrip feedline slot-coupled circularly polarized (CP) cylindrical dielectric resonator antenna (DRA) for 2.4-GHz industry, science and medicine (ISM) band applications is reported in this letter. Good CP characteristics can be achieved using two coupling points with a quarter-wavelength path difference and 90° phase shift, resulting in a series feeding circuitry. The 10-dB impedance bandwidth and the 3-dB axial ratio of the proposed antenna are 141 and 85 MHz, respectively. Details of the antenna design procedure are described and typical experimental results are presented and discussed.
Keywords :
UHF antennas; antenna feeds; dielectric resonator antennas; electromagnetic wave polarisation; microstrip components; microstrip lines; DRA feed; ISM band application; antenna design procedure; axial ratio; bandwidth 141 MHz; bandwidth 85 MHz; circularly polarized cylindrical dielectric resonator antenna; coupling point; frequency 2.4 GHz; impedance bandwidth; industry science and medicine band application; off-centered microstrip feedline; off-centered microstrip line; phase shift; quarter-wavelength path difference; series feeding circuitry; special feeding technique; Antenna measurements; Dielectric resonator antennas; Dielectrics; Frequency measurement; Microstrip; Microstrip antennas; Circularly polarized (CP); dielectric resonator antenna (DRA); industry, science and medicine (ISM) band; slot-coupled;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2388075
