Design and development of folded stub loaded microstrip reflectarray antenna

Author

Srikanth, M. ; Raghavan, Srinath ; Rao, P.H.

Author_Institution

Dept. of Electron. & Commun. Eng., Nat. Inst. of Technol., Tiruchirappalli, India

fYear

2011

fDate

18-22 Dec. 2011

Firstpage

1

Lastpage

5

Abstract

Design and measurement results of a folded microstrip reflectarray antenna are presented. This antenna contains of a feed antenna, a main reflector for focusing and twisting and a sub-reflector for polarization selection. A 2×2 patch array is used as a feed antenna unlike conventional horn antennas. The main reflector is a 10×10 microstrip patch array and each microstrip patch in the array is attached with two open ended stubs for beam focusing and twisting the polarization. The sub-reflector is placed above the main reflector which consists of parallel metal lines printed on dielectric substrate. The sub-reflector is transparent to the signal incident in orthogonal polarization and opaque for the parallel polarization. The proposed antenna exhibits a measured gain of 22dB and side lobe level of -20dB at designed frequency of 10GHz. The proposed folded reflectarray antenna has low profile and exhibits wide impedance bandwidth (9.6-10.4GHz) with VSWR <; 1.5.

Keywords

antenna feeds; electromagnetic wave polarisation; microstrip antenna arrays; reflectarray antennas; dielectric substrate; feed antenna; folded stub loaded microstrip reflectarray antenna; frequency 10 GHz; orthogonal polarization; parallel polarization; patch array; polarization selection; signal incident; subreflector; Antenna feeds; Antenna measurements; Arrays; Microstrip; Microstrip antennas; Reflector antennas; Folded reflectarray; polarizing grid and low profile antenna;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Electromagnetics Conference (AEMC), 2011 IEEE

Conference_Location

Kolkata

Print_ISBN

978-1-4577-1098-8

Type

conf

DOI

10.1109/AEMC.2011.6256839

Filename

6256839