Title :
A millimeter-wave wideband balanced amplifier using multilayer MMIC directional couplers
Author :
Imaoka, Toshikaz ; Banba, Seiichi ; Imai, Nobuaki
Author_Institution :
ATR Optical and Radio Communications Research Laboratories 2-2 Hikari-dai, Seika-cho, Souraku-gun, Kyoto 619-02, Japan. TEL.: +81-774-95-1511; FAX.: +81- 774-95-1508; E-mail: imaoka@atr-rd.atr.co.jp t
Abstract :
This paper describes a millimeter-wave wideband balanced amplifier using novel multilayer MMIC directional couplers. The 3 dB-couplers designed for a center frequency of 50 GHz show coupling losses of 3.9 dB ± 0.3 dB. The balanced amplifier fabricated in a 1.2 mm × 2.3 mm areas, shows a gain of 10-14 dB with input and output return losses of better than 14 dB from 34 to 52 GHz. The utilized directional couplers can be applied without degrading the circuit performance or increasing the circuit area. To our knowledge, this is the first millimeter-wave active circuit employing multilayer MMIC´s.
Keywords :
Active circuits; Broadband amplifiers; Circuit optimization; Degradation; Directional couplers; Frequency; Gain; MMICs; Millimeter wave circuits; Nonhomogeneous media;
Conference_Titel :
Microwave Conference, 1995. 25th European
Conference_Location :
Bologna, Italy
DOI :
10.1109/EUMA.1995.337113
