Title :
Wideband Circularly Polarized Substrate Integrated Cavity-Backed Antenna Array
Author :
Yu Lang ; Shi-Wei Qu ; Jian-Xin Chen
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this letter, a 4 ×4 substrate integrated waveguide (SIW)-fed circularly polarized (CP) antenna array with a broad axial-ratio (AR) bandwidth is designed and fabricated by multilayer printed circuit board (PCB) technology. The antenna array consists of 16 sequentially rotated elliptical cavities fed by slots on the SIW acting as the radiating elements, four 1-to-4 SIW power dividers, and a transition from a coaxial cable to the SIW. The widened AR bandwidth of the antenna array is achieved by using an improved SIW power divider. The antenna prototype was fabricated and measured, and the discrepancies between simulations and measurements are carefully analyzed.
Keywords :
antenna radiation patterns; broadband antennas; coaxial cables; electromagnetic wave polarisation; power dividers; printed circuit manufacture; substrate integrated waveguides; waveguide antenna arrays; AR bandwidth; SIW; antenna prototype fabrication; axial-ratio bandwidth; coaxial cable; elliptical cavity; improved SIW power divider; multilayer PCB technology; printed circuit board; radiating element; wideband circularly polarized substrate integrated cavity backed antenna array; Antenna arrays; Antenna measurements; Arrays; Bandwidth; Cavity resonators; Microstrip antennas; Antenna array; axial ratio; circular polarization; substrate integrated waveguide;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2342793
