A K- to Ka-Band Broadband Doubly Balanced Monolithic Ring Mixer

Author

Chuang, Ho-Chiao ; Lin, Chih-Ming ; Wang, Yu-Huan

Author_Institution

Dept. of Electr. Eng., Nat. Cheng-Kung Univ., Tainan

Volume

18

Issue

6

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

401

Lastpage

403

Abstract

A broadband doubly balanced monolithic ring mixer with a new intermediate frequency (IF) signal extraction method implemented by 0.15 mum pHEMT process is presented. The hybrid couplers of the proposed mixer consist of multiple coupled lines and fourfold coupled line Marchand baluns. The use of multiple coupled lines leads to a die size less than 1 times 1 mm² and improves the bandwidth of the mixer. The novel fourfold coupled line allows the extraction of the IF signal directly without any extra low pass filter circuits. The mixer exhibited 8-13 dB conversion loss, high radio frequency/local oscillation isolation of 35-50 dB over 16-40 GHz and an input 1-dB compression point of 14 dBm.

Keywords

MMIC mixers; baluns; circuit oscillations; coupled circuits; low-pass filters; millimetre wave mixers; broadband doubly balanced monolithic ring mixer; fourfold coupled line Marchand baluns; frequency 16 GHz to 40 GHz; high radio frequency/local oscillation isolation; hybrid couplers; intermediate frequency signal extraction method; loss 8 dB to 13 dB; low pass filter circuits; multiple coupled lines; Doubly balanced ring mixer; K-band; Ka-band; monolithic microwave integrated circuit (MMIC); pHEMT;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2008.922648

Filename

4530632