A 76 GHz high performance subharmonic mixer MMIC using low 1/f noise diodes for automotive radars

Author

Kanaya, Koh ; Aihara, Yasuki ; Katoh, Takayuki ; Komaru, Makio ; Matsuda, Yoshio

Author_Institution

High Frequency & Opt. Device Works, Mitsubishi Electr. Corp., Hyogo, Japan

fYear

2004

fDate

24-27 Oct. 2004

Firstpage

260

Lastpage

263

Abstract

This paper describes a low-noise subharmonic mixer MMIC for 76-GHz automotive radar systems. To improve a noise figure in a 100-kHz low IF band, a low 1/f-noise Schottky barrier diode (SBD) has been developed for the mixer. This SBD can offer 20 dB better 1/f-noise levels than a conventional HEMT type SBD can under the same operating current density condition. The fabricated mixer delivers a measured conversion gain of better than -9 dB and a measured noise figure of 12 dB under the condition of a 3-dBm low LO power and a 100-kHz low IF band. This noise figure is 26 dB lower than that of an HEMT type SBD subharmonic mixer with the same circuit topology. To our knowledge, the noise figure at the low IF band is the best performance of 76-GHz mixers ever reported.

Keywords

1/f noise; MMIC mixers; Schottky diodes; automotive electronics; road vehicle radar; 100 kHz; 12 dB; 76 GHz; MMIC; Schottky barrier diode; automotive radars; high performance subharmonic mixer; low 1/f noise diodes; noise figure; Acoustical engineering; Automotive engineering; Gain measurement; HEMTs; MMICs; Noise figure; Noise measurement; Power measurement; Radar; Schottky diodes;

fLanguage

English

Publisher

ieee

Conference_Titel

Compound Semiconductor Integrated Circuit Symposium, 2004. IEEE

ISSN

1550-8781

Print_ISBN

0-7803-8616-7

Type

conf

DOI

10.1109/CSICS.2004.1392557

Filename

1392557