Title :
Design and Implementation of Dual-Frequency Dual-Polarization Slotted Waveguide Antenna Array for Ka-Band Application
Author :
Teng Li ; Hongfu Meng ; Wenbin Dou
Author_Institution :
State Key Lab. of Millimeter Waves, Southeast Univ., Nanjing, China
Abstract :
In this letter, a dual-frequency dual-polarization slotted waveguide antenna array at Ka-band is proposed. A 9 ×10 inclined slot array working at 35 GHz, cut in the narrow wall of rectangular waveguides, is employed for horizontal polarization (HP). An 8 ×10 longitudinal slot array working at 30 GHz, etched on the broadside of ridged waveguides, is employed for vertical polarization (VP). The two arrays are interlaced with each other and fed from the opposite sides. Two novel bend interconnected structures are invented to connect the radiating waveguides and feeding networks, which simplify and compact the antenna structure and improve the aperture efficiency. The measured -10-dB reflection coefficient bandwidth of HP array is 688 MHz, and 658 MHz for VP array. The maximum gain is 25.4 and 24.8 dB for HP array and VP array, which correspond to the aperture efficiency of 36.3% and 43.05%, respectively. The sidelobe levels of both arrays are below -17.6 dB.
Keywords :
antenna feeds; etching; microwave antenna arrays; multifrequency antennas; ridge waveguides; slot antenna arrays; Ka-band application; antenna array; antenna structure; aperture efficiency; bend interconnected structures; dual-frequency dual-polarization slotted waveguide; etching; feeding networks; frequency 30 GHz; frequency 35 GHz; frequency 658 MHz; frequency 688 MHz; horizontal polarization; inclined slot array; longitudinal slot array; radiating waveguides; rectangular waveguides; ridged waveguides; vertical polarization; Admittance; Antenna arrays; Antenna measurements; Apertures; Arrays; Couplings; Slot antennas; Antenna arrays; dual frequency; dual polarization; feeding network; slotted waveguide;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2337355