NDLI: Millimeter-wave-band amplifier and mixer MMICs using a broad-band 45/spl deg/ power divider/combiner

Content Provider	IEEE Xplore Digital Library
Author	Hayashi, H. Okazaki, H. Kanda, A. Hirota, T. Muraguchi, M.
Copyright Year	1963
Abstract	This paper demonstrates millimeter-wave-band amplifier and mixer monolithic microwave integrated circuits (MMIC's) using a broad-band 45/spl deg/ power divider/combiner. At first, we propose a broad-band 45/spl deg/ power divider/combiner, which combines a Wilkinson divider/combiner, 45/spl deg/ delay line, and 90/spl deg/ short stub. A coupling loss of 4.0/spl plusmn/0.2 dB and a return loss and an isolation of more than 19 dB with 45/spl plusmn/1/spl deg/ phase difference was obtained from 17 to 22 GHz for the fabricated K-band MMIC 45/spl deg/ power divider/combiner. Next, a parallel amplifier using the broad-band 45/spl deg/ power divider/combiner, which can be used in a power-combining circuit configuration requiring no isolator, is shown. Comparing the transmitter intermodulation generated in the parallel amplifier using the broad-band 45/spl deg/ power divider/combiner and that generated in the one using the conventional type, the broad-band suppression effect was confirmed. Finally, an application of the broad-band 45/spl deg/ power divider/combiner to a single-sideband (SSB) subharmonically pumped (SHP) mixer requiring no IF switch is shown. In an RF frequency range from 22.89 to 26.39 GHz, the fabricated K-band MMIC mixer achieved (for up-conversion) the good results of more than -13-dB conversion gain and more than 24-dB image-rejection ratio. These contribute significantly to the miniaturization of millimeter-wave communication equipment.
Sponsorship	IEEE Microwave Theory and Techniques Society
Starting Page	811
Ending Page	819
Page Count	9
File Size	249063
File Format	PDF
ISSN	00189480
Volume Number	46
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	MMICs Power dividers Millimeter wave communication Power amplifiers Millimeter wave integrated circuits K-band Power generation Mixers Switches Microwave amplifiers
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

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