A W-band trans-twist monopulse microstrip patch reflectarray

Author

Jahagirdar ; Prasad, J.V.

Author_Institution

Res. Center Imarat, DRDO, Hyderabad

fYear

2005

fDate

6-7 Oct. 2005

Firstpage

197

Lastpage

199

Abstract

The design and performance results of a W-band trans-twist microstrip patch reflect-array excited by a multi-mode corrugated horn feed is described in this paper. The reflect-array performs dual role of collimating the beam as well as twisting the polarization. The multi-mode corrugated horn is used as a feed to generate sum, azimuth and elevation difference patterns. This paper also points out the systematic aperture phase errors in design due to non-availability of conjugate pair of patch dimension that simultaneously delivers required focusing and twisting. A few reflect-arrays were fabricated and tested at W-band. The measured performance showed high gain and low cross-polarization and very good monopulse patterns. The performance is very good, repeatable and close to the expected specifications

Keywords

antenna feeds; electromagnetic wave polarisation; horn antennas; microstrip antenna arrays; W-band trans-twist monopulse reflectarray; cross-polarization; microstrip patch reflectarray; multimode corrugated horn feed; systematic aperture phase errors; Apertures; Azimuth; Feeds; Microstrip; Optical reflection; Periodic structures; Phase shifters; Phased arrays; Polarization; Reflector antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Radar Conference, 2005. EURAD 2005. European

Conference_Location

Paris

Print_ISBN

2-9600551-3-6

Type

conf

DOI

10.1109/EURAD.2005.1605599

Filename

1605599