High efficiency antenna array with optimized corporate hybrid feed

Author

Busuioc, Dan ; Borji, Amir ; Shahabadi, Mahmoud ; Safavi-Naeini, Safieddin

Author_Institution

Dept. of E&CE, Waterloo Univ., Ont.

fYear

2006

fDate

9-14 July 2006

Firstpage

1503

Lastpage

1506

Abstract

A low-cost Ku-band array of circularly polarized microstrip antennas benefiting from a low-loss waveguide feed network is demonstrated (patent pending). The 128 elements of the array which are arranged in a 4-by-32 configuration are subdivided into four 4-by-8 subarrays. To maintain feed losses and thus the overall noise temperature at a minimum, the subarrays are excited using a 1-by-4 corporate feed network of hollow metallic waveguides. Due to a low-loss foam substrate, the array elements show high circular polarization gain of 7.5 dBic and wide relative bandwidth of 4%. The measured circular polarization gain of the array amounts to 25.6 dBic with an aperture efficiency of 51% in the Ku-band of frequencies

Keywords

antenna feeds; microwave antenna arrays; polarisation; waveguides; 1-by-4 corporate feed network; 4-by-32 configuration; 4-by-8 subarrays; aperture efficiency; array elements; circular polarization gain; circularly polarized microstrip antennas; feed losses; high efficiency antenna array; hollow metallic waveguides; low-cost Ku-band array; low-loss foam substrate; low-loss waveguide feed network; noise temperature; optimized corporate hybrid feed; wide relative bandwidth; Antenna arrays; Antenna feeds; Bandwidth; Frequency measurement; Gain measurement; Hollow waveguides; Microstrip antenna arrays; Microstrip antennas; Polarization; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium 2006, IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

1-4244-0123-2

Type

conf

DOI

10.1109/APS.2006.1710838

Filename

1710838