Design and Characterization of Dual Polarized feed for Satellite Communication Antenna
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
So far, extensive research has been made, and researchers have shown that use of septum polarizer for feed designing not only provides the dual polarization but also improve the input reflection and cross-polar isolation performance of the feed.
In this thesis design of the feed for satellite communication antenna has been investigated, which provides the transmission in right hand circular polarization and reception in left hand circular polarization. A feed which covers both receives and transmits bands, i.e. (7.25-7.75 GHz) and (7.9-8.4 GHz) was designed by using the low axial ratio stepped septum polarizer in square waveguide technology, and the circular horn with the round ring choke at the aperture of the feed. Choke at the aperture of the feed was reduced the level of side and back lobes and improves the gain and efficiency of the reflector antenna by putting more energy at the aperture of the reflector antenna. The excitation of the feed has been done by using the standard WR-112 rectangular waveguide at the input of the feed.
Design and optimization of the feed have been done in High frequency structure simulator (HFSS) tool, and the simulation results show the input reflection performance of the feed less than -18 dB and the cross-polar isolation better than 25 dB. Finally, the optimized design of feed has been fabricated and measured results show that feed has reasonable input reflection and good cross-polar isolation performance over the entire bandwidth.
Place, publisher, year, edition, pages
2012. , 64 p.
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:liu:diva-91331ISRN: LiU-ITN-TEK-A--12/074--SEOAI: oai:DiVA.org:liu-91331DiVA: diva2:617211
Subject / course