Analysis and design of a differential sampled-line six-port reflectometer
Julrat, S, Chongcheawchamnan, M, Khaoraphapong, T et al. (1 more author)
(2012)
Analysis and design of a differential sampled-line six-port reflectometer.
IEEE Transactions on Microwave Theory and Techniques, 61 (1).
244 - 255.
ISSN 0018-9480
Abstract
The analysis and design of a differential six-port reflectometer (SPR) based on a sampled-line structure is presented in this paper. The practical differential SPR is realized in Coplanar Strip (CPS) transmission line form, using two baluns for interfacing with the RF source and device under test (DUT) and four baluns connected to the RF logarithmic detectors. The performance of the proposed differential SPR structure is evaluated with a common-mode rejection ratio analysis and impedance measurement. A prototype differential SPR was designed and fabricated at 1 GHz in order to verify the analysis. Measurement results for various load impedances are compared with the measured results obtained from a commercial automatic vector network analyzer. It is shown that the differential structure gives a significant advantage in rejecting common-mode interference signals.
Metadata
Item Type:
Article
Authors/Creators:
Julrat, S
Chongcheawchamnan, M
Khaoraphapong, T
Robertson, ID
Copyright, Publisher and Additional Information:
(c) 2012 IEEE. This is an author produced version of a paper published in IEEE Transactions on Microwave Theory and Techniques. Uploaded in accordance with the publisher's self-archiving policy. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works
Keywords:
Impedance measurement; microwave measurements; reflectometry; transmission line measurements; UHF detectors; baluns; coplanar waveguides; electric impedance measurement; interference (signal); network analysers; reflectometers; strip lines; CPS; DUT; RF logarithmic detector; SPR; commercial automatic vector network analyzer; common-mode interference signal; common-mode rejection ratio analysis; coplanar strip transmission line form; device under test; differential sampled-line six-port reflectometer; frequency 1 GHz; impedance measurement; load impedance measurement; calibration; Impedance; Impedance matching; Radio frequency; Scattering parameters; Transmission line measurements
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