A K-band bi-phase modulator MMIC for UWB application

Author

Tokumitsu, Tsuneo ; Oya, Akio ; Piernas, Belinda ; Sakai, Kazuo ; Hasegawa, Yuichi

Author_Institution

Eudyna Devices Inc., Yokohoma, Japan

Volume

15

Issue

3

fYear

2005

fDate

3/1/2005 12:00:00 AM

Firstpage

159

Lastpage

161

Abstract

A 24-GHz-band, three-dimensional microwave monolithic integrated circuit (MMIC) bi-phase modulator, that is a combination of an active 0/π splitter and a SPDT switch, is proposed and demonstrated. Comparing conventional K-band bi-phase modulators, this modulator is broadband, significantly MMIC compatible, and shrinks its chip area. A fabricated bi-phase modulator exhibits an area of 1.0×0.7mm² and a 1-dB bandwidth of nearly 10GHz. The SPDT switch is optimized in control-gate´s time constant so that a very clear bi-phase modulated waveform can be generated from 1Gbps PN code. The insertion loss and the phase imbalance are 6.4 dB+/-0.6 dB and within 10°, respectively, between 22GHz and 32GHz.

Keywords

MMIC; modulators; ultra wideband technology; 2.4E10 Hz; 3D microwave monolithic integrated circuit; K-band bi-phase modulator MMIC; SPDT switch; active splitter; bi-phase modulated waveform; broadband modulator; control-gate time constant; insertion loss; phase imbalance; ultra wideband application; Bandwidth; Character generation; HEMTs; K-band; MMICs; MODFETs; Microwave FETs; Monolithic integrated circuits; Spread spectrum radar; Switches; 1 Gbit/s; Active splitter; bi-phase modulator; microwave monolithic integrated circuit (MMIC);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2005.844209

Filename

1406062