Title :
60-GHz Circularly Polarized Antenna Array Made in Low-Cost Fabrication Process
Author :
Guntupalli, Ajay Babu ; Ke Wu
Author_Institution :
Dept. of Electr. Eng., Ecole Polytech. of Montreal, Montréal, QC, Canada
Abstract :
Circularly polarized (CP) antenna operating in the unlicensed 60 GHz frequency range is useful for millimeter-wave radio and radar applications. In this letter, a 2 × 2 right-handed circularly polarized (RHCP) planar array is demonstrated by using four CP antenna elements. A single element has a gain of 7.5 dBiC, while the resulting 2 × 2 array yields a CP gain of 12.5 dBiC. Substrate integrated waveguide (SIW) cavity is used to back each element in order to reduce the mutual coupling between elements and also improve the overall gain. An experimental antenna prototype made through a conventional low-cost printed circuit board (PCB) technique operates in RHCP mode covering the frequency range of interest from 58 to 62 GHz. The antenna is compact, showing a good radiation performance.
Keywords :
antenna radiation patterns; millimetre wave antenna arrays; planar antenna arrays; polarisation; printed circuits; substrate integrated waveguides; CP antenna array; CP antenna elements; CP gain; PCB technique; RHCP mode; RHCP planar array; SIW cavity; circularly polarized antenna array; experimental antenna prototype; frequency 58 GHz to 62 GHz; low-cost fabrication process; millimeter-wave radio; mutual coupling; printed circuit board; radar applications; radiation performance; right-handed circularly polarized planar array; substrate integrated waveguide; unlicensed frequency range; Antenna arrays; Arrays; Bandwidth; Gain; Substrates; 60-GHz radio; axial ratio; circular polarization; substrate integrated waveguide (SIW);
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2320906
