A novel hybrid active quasi-circulator for L-band applications

Author

Palomba, Mirko ; Bentini, Andrea ; Palombini, Diego ; Ciccognani, Walter ; Limiti, Ernesto

Author_Institution

Dipt. di Ing. Elettron., Univ. degli studi di Roma "Tor Vergata", Rome, Italy

Volume

1

fYear

2012

fDate

21-23 May 2012

Firstpage

41

Lastpage

44

Abstract

In this contribution a hybrid active quasi-circulator operating in L-Band is presented. E-pHEMT active devices mounted on ceramic substrate with copper metallization have been used. The proposed quasi-circulator is composed by active non-reciprocal phase shifters and classical passive combining structures to get the desired functionality. Insertion losses better than 2.1 dB, isolation higher than 20 dB in the 1.35 ÷ 1.65 GHz frequency band is obtained, while an isolation better than 30 dB over a 15% bandwidth. Port matching is better than 15 dB on coupler´s ports, while the splitter one reaches 10 dB. The overall quasi-circulator exhibits a 22 % operating bandwidth.

Keywords

UHF phase shifters; circulators; high electron mobility transistors; metallisation; waveguide couplers; E-pHEMT active devices; L-band application; active nonreciprocal phase shifters; ceramic substrate; classical passive combining structures; copper metallization; coupler port; frequency 1.35 GHz to 1.65 GHz; hybrid active quasicirculator; insertion loss; port matching; Bandwidth; Circulators; Couplers; Microwave FET integrated circuits; Microwave circuits; Microwave integrated circuits; HMIC; L-band; NRPS; active; circulator; hybrid; non-reciprocal; phase shifter; quasi-circulator;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Radar and Wireless Communications (MIKON), 2012 19th International Conference on

Conference_Location

Warsaw

Print_ISBN

978-1-4577-1435-1

Type

conf

DOI

10.1109/MIKON.2012.6233533

Filename

6233533