NDLI: Broadband high frequency differential coupler

Content Provider	IEEE Xplore Digital Library
Author	Vandersteen, G. Barel, A. Rolain, Y.
Copyright Year	2001
Description	Author affiliation: IMEC, Heverlee, Belgium (Vandersteen, G.)
Abstract	This paper describes the design methodology of a broadband, high frequency differential coupler. The output signal of this differential coupler is proportional to the difference of 2 input ports, i.e. proportional to the differential signal of the 2 inputs. This signal is made using a hybrid structure. The overall performance of this differential coupler and the hybrid structure is characterized by the differential coupling factor and by the common mode rejection ratio. A pair of broadband impedances are used to scale the 2 incoming signals with 2 complex coefficients. A symmetric structure of two identical broadband directional couplers and a symmetric power combiner are used afterwards to obtain the differential signal. The high bandwidth of both the terminations, the directional couplers and the power combiner make it possible to obtain a differential coupling factor and a common mode rejection ratio which is frequency insensitive over several decades. Measurements demonstrate a differential coupler with a bandwidth of more than 3 decades.
Sponsorship	IEEE Instrum. & Meas. Soc.
Starting Page	1897
Ending Page	1902
File Size	455166
Page Count	6
File Format	PDF
ISBN	0780366468
ISSN	10915281
DOI	10.1109/IMTC.2001.929531
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-05-21
Publisher Place	Hungary
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Coupling circuits Impedance matching Directional couplers Bandwidth Integrated circuit measurements Power combiners Microwave frequencies Transformers Signal analysis Dynamic range
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

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