A millimetre-wave bandpass filter-lens array

Author

Abbaspour-Tamijani, A. ; Sarabandi, K. ; Rebeiz, G.M.

Author_Institution

Dept. of Electr. Eng., Arizona State Univ., AZ

Volume

1

Issue

2

fYear

2007

fDate

4/1/2007 12:00:00 AM

Firstpage

388

Lastpage

395

Abstract

A filter-lens array (FLA) is a planar array of bandpass integrated antenna-filter-antenna (AFA) elements which are stagger-tuned in the vicinity of a centre frequency, so as to provide the phase shift required for transforming spherical and planar wavefronts. Due to the filtering response of the AFA elements, FLA presents a bandpass gain and can act as a combination of a conventional lensarray and a filter. An FLA structure is demonstrated with f/D=1.25 and 8.2% bandwidth at 35 GHz. This FLA is composed of 137 AFA elements and fabricated on two three-inch glass wafers (epsi_r=4.45). A gain of 25.6 dBi and a total efficiency of 45% have been measured at 35 GHz. The Ka-band FLA shows a low-loss scanning performance for up to at least plusmn30deg in the H-plane and plusmn20deg in the E-plane

Keywords

band-pass filters; lens antennas; millimetre wave antenna arrays; millimetre wave filters; planar antenna arrays; scanning antennas; 35 GHz; AFA; FLA; Ka-band; bandpass integrated antenna-filter-antenna element; filter-lens array; glass wafers; millimetre-waves; planar array; planar wavefront; scanning performance; spherical wavefront;

fLanguage

English

Journal_Title

Microwaves, Antennas & Propagation, IET

Publisher

iet

ISSN

1751-8725

Type

jour

DOI

10.1049/iet-map:20050295

Filename

4167697