Multifeed EBG dual band antenna to feed a reflector antenna

Author

Kanso, A. ; Chantalat, R. ; Thevenot, M. ; Naeem, U. ; Bila, S. ; Monediere, T.

Author_Institution

Univ. of Limoges, Limoges, France

fYear

2011

fDate

10-13 Oct. 2011

Firstpage

866

Lastpage

869

Abstract

In this paper, we present the design of a multibeam reflector antenna fed by a multifeed dual band Electromagnetic Band Gap (EBG) antenna to achieve a high gain multispot coverage for space applications. First, we design a dual band EBG antenna in monofeed configuration. Then the same antenna in multifeed configuration is studied and the results are compared to those obtained with one horn. Filters have been used in order to reduce the parasitic interferences, which occur in a multifeed EBG antenna and consequently to obtain good radiation characteristics. As shown in this paper the same EBG phase center has been obtained in both frequency bands. Finaly we have studied the whole system composed of the offset reflector and the multifeed EBG dual band antenna. An Edge Of Coverage (EOC) gain higher than 42 dB and sidelobes levels lower than -18dB are obtained over all spots.

Keywords

interference suppression; microwave antennas; microwave filters; multibeam antennas; multifrequency antennas; offset reflector antennas; photonic band gap; reflector antenna feeds; edge of coverage; electromagnetic band gap; filters; frequency 5 GHz; frequency 7.5 GHz; horn atenna; multibeam reflector antenna feed design; multifeed EBG dual band antenna; offset reflector antenna; parasitic interference reduction; Antenna feeds; Antenna radiation patterns; Dual band; Metamaterials; Periodic structures; Reflector antennas; EBG antenna; dual band; multibeam; reflector antenna;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference (EuMC), 2011 41st European

Conference_Location

Manchester

Print_ISBN

978-1-61284-235-6

Type

conf

Filename

6101849