Title :
Matching slot pair for a circularly-polarised slotted waveguide array
Author :
Hirokawa, J. ; Sakurai, K. ; Ando, M. ; Goto, N.
Author_Institution :
Dept. of Electron. & Electr. Eng., Tokyo Inst. of Technol., Japan
fDate :
12/1/1990 12:00:00 AM
Abstract :
A matching slot pair which radiates all the incident power in a circularly-polarised wave is proposed and analysed for use as a terminal in a leaky-wave slotted waveguide array. The position and size of the slots are numerically optimised to suppress reflection and to realise a desired polarisation in the tilted beam direction, which contributes to improving the antenna efficiency. It is verified experimentally that the return loss is below -15 dB over 0.1 GHz at the 4 GHz band and the 3 dB axial ratio bandwidth is about 5% in the tilted beam direction.
Keywords :
Green´s function methods; antenna radiation patterns; integral equations; microwave antenna arrays; waveguide antennas; 4 GHz; Galerkin´s method; antenna efficiency; axial ratio bandwidth; circularly-polarised wave; dyadic Green´s functions; integral equations; leaky-wave slotted waveguide array; matching slot pair; radiation patterns; return loss; tilted beam direction;
Journal_Title :
Microwaves, Antennas and Propagation, IEE Proceedings H
