A Ka-band InP MMIC 180° phase switch

Author

Kettle, D. ; Roddis, N. ; Sloan, R.

Author_Institution

Univ. of Manchester, UK

Volume

15

Issue

6

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

425

Lastpage

427

Abstract

A new type of Ka band (26 to 36 GHz) 180 degree phase switch (bi-phase modulator) monolithic microwave integrated circuit has been developed for the EC funded FARADAY radio astronomy project. This integral component forms part of a chip set for a very low noise switching radiometer operating at a temperature of approximately 15 K. To maximize the sensitivity of the radiometer lattice-matched indium phosphide HEMT technology has been used: all of the active components of the radiometer, with the exception of the detectors, have been manufactured on a single wafer process. Design principles are described, together with a comparison of modeled and measured results. The results show an average insertion loss of 3.5 dB, return loss of better than 10 dB and an average phase difference close to 170°±10° the 26-36 GHz band.

Keywords

MMIC; high electron mobility transistors; indium compounds; phase modulation; radiometry; 10 dB; 15 K; 26 to 36 GHz; 3.5 dB; FARADAY radio astronomy project; HEMT technology; InP; MMIC; bi-phase modulator; cosmic microwave background; ka-band; low noise switching radiometer; monolithic microwave integrated circuit; phase switch; single wafer process; Active noise reduction; Indium phosphide; MMICs; Microwave integrated circuits; Microwave radiometry; Monolithic integrated circuits; Phase modulation; Radio astronomy; Switches; Switching circuits; Cosmic microwave background (CMB); HEMT; monolithic microwave integrated circuit (MMIC);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2005.850562

Filename

1435445