W-Band Orthomode Transducer for Dense Focal-Plane Clusters

Author

Virone, G. ; Peverini, O.A. ; Lumia, M. ; Farooqui, M.Z. ; Addamo, G. ; Tascone, R.

Author_Institution

Ist. di Elettron. ed Ing. dell´Inf. e delle Telecomun., Turin, Italy

Volume

25

Issue

2

fYear

2015

fDate

Feb. 2015

Firstpage

85

Lastpage

87

Abstract

A W-band orthomode transducer has been designed for polarimeter clusters in dense focal planes. Its compact geometry, with aligned output ports, allows for a closely-spaced triangular-lattice arrangement. At these high frequencies, the platelet manufacturing strategy has been applied and verified experimentally on seven prototypes, showing reflection coefficients lower than polarimeter clusters-20 dB, insertion loss of about 0.25 dB and cross-coupling and isolation levels of -42 dB and 45 dB, respectively, in a 30% bandwidth.

Keywords

astronomical instruments; focal planes; microwave detectors; polarimeters; radioastronomy; transducers; W-band orthomode transducer; aligned output ports; closely-spaced triangular-lattice arrangement; compact geometry; dense focal-plane clusters; platelet manufacturing strategy; polarimeter clusters; reflection coefficients; Bandwidth; Junctions; Manufacturing; Metals; Prototypes; Transducers; Wireless communication; Antenna feeds; polarimeter; radio astronomy; waveguide junctions;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2014.2373638

Filename

6978000