A Cassegrain Offset-Fed Dual-Band Reflectarray

Author

Huang, J. ; Han, C. ; Chang, K.

Author_Institution

Jet Propulsion Lab., Pasadena, CA

fYear

2006

fDate

9-14 July 2006

Firstpage

2439

Lastpage

2442

Abstract

An X/Ka dual-band microstrip reflectarray with circular polarization (CP) has been constructed using thin membranes and Cassegrain offset-fed configuration. It is believed that this is the first Cassegrain reflectarray ever been developed. This antenna has a 75-cm-diameter aperture and uses metallic subreflector and angular-rotated annular ring elements. It achieved a measured -3 dB-gain bandwidth of 700 MHz at X-band and 1.5 GHz at Ka-band, as well as a CP bandwidth (3 dB axial ratio) of more than 700 MHz at X-band and more than 2 GHz at Ka-band. The measured peak efficiencies are 49.8% at X-band and 48.2% at Ka-band

Keywords

electromagnetic wave polarisation; microwave antenna arrays; multifrequency antennas; offset reflector antennas; reflector antenna feeds; 1.5 GHz; 2 GHz; 700 MHz; 75 cm; Cassegrain offset-fed dual-band reflectarray; angular-rotated annular ring elements; circular polarization; metallic subreflector; microstrip reflectarray; thin membranes; Antenna measurements; Aperture antennas; Bandwidth; Biomembranes; Dual band; Feeds; Laboratories; Polarization; Propulsion; Space technology;

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.2006.1711089

Filename

1711089