NDLI: Monolithic GaAs Interdigitated 90° Hybrids with 50- and 25-Ohm Impedances

Content Provider	IEEE Xplore Digital Library
Author	Kumar, M. Subbarao, S.N. Menna, R.J. Huang, H.
Copyright Year	1987
Abstract	This paper describes the design, fabrication and performance of two monolithic GaAs C-band 900 interdigitated couplers with 50-ohm and 25-ohm impedances, respectively. A comparison of the performance of these two couplers shows thar the 25-ohm coupler has the advantages of lower loss, higher fabrication yield and needs fewer numbers of matching elements when it is used in the balanced amplifier configuration. The fewer number of matching elements results in great savings in the GaAs real estate for MMICS. Both the couplers have been fabricated on a 0.1 mm thick GaAs SI substrate. The measured results agree quite well with calculated results. The losses of the 50-ohm and 25-ohm couplers are 0.5 and 0.3 dB, respectively, over the 4-8 GHz frequency band.
Starting Page	50
Ending Page	53
File Size	511549
Page Count	4
File Format	PDF
DOI	10.1109/MCS.1982.1112180
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1983-05-31
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gallium arsenide Impedance Couplers Conductors Fabrication Gold Frequency Virtual manufacturing Skin Monolithic integrated circuits
Content Type	Text
Resource Type	Article

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Monolithic GaAs Interdigitated 90° Hybrids with 50- and 25-Ohm Impedances