Title :
Millimeter-Wave Bowtie Excited Cavity-Backed Antenna With Improved Aperture
Author :
Qu, Shi-Wei ; Ng, Kung Bo
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China (UESTC), Chengdu, China
fDate :
7/4/1905 12:00:00 AM
Abstract :
A broadband millimeter-wave cavity-backed antenna, excited by a rounded bowtie dipole, is reported in this letter. To improve the radiation patterns and the broadside gains, its aperture is optimized by cutting the sections with higher-order modes at lower frequencies away from a large aperture, forming a specific open cavity structure. Simulations show that the antenna can present an impedance bandwidth from 28 to over 50 GHz for SWR ≤ 2, and a bandwidth from 28 to 49 GHz for -10-dB sidelobe level. Measurements agree reasonably well with simulations. Comparisons between the antennas with and without the improved aperture in terms of electric field distribution and radiation patterns clearly show performance enhancement.
Keywords :
antenna radiation patterns; bow-tie antennas; dipole antennas; millimetre wave antennas; antenna radiation patterns; bandwidth 28 GHz to 50 GHz; broadband millimeter-wave cavity-backed antenna; electric field distribution; higher-order modes; millimeter-wave bowtie excited cavity-backed antenna; rounded bowtie dipole antenna; Antenna radiation patterns; Aperture antennas; Bandwidth; Broadband antennas; Cavity resonators; Gain; Bowtie antennas; broadband antennas; cavity- backed antennas (CBAs); millimeter waves;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2012.2204719
