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기술보고서

기술보고서 게시판 내용
타이틀	Calibration Procedure for Measuring S-Parameters in Balun Applications on 150-ohm High-Speed Cables
저자	Theofylaktos, Onoufrios;; Warner, Joseph D.
Keyword	CALIBRATING;; COUPLERS;; HIGH SPEED;; IMPEDANCE;; RADIO FREQUENCIES;; REFLECTOMETERS;; TRANSFORMERS
URL	http://hdl.handle.net/2060/20120008524
보고서번호	NASA/TM-2012-217296
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	In the radiofrequency (RF) world, in order to characterize cables that do not conform to the typical 50-omega impedance, a time domain reflectometer (TDR) would probably be the simplest and quickest tool to attain this goal. In the real world, not every engineer has a TDR at their disposal;; however, they most likely have a network analyzer available. Given a generic 50-omega vector network analyzer (VNA), we would like to make S-parameter measurements for non-50-omega devices (DUTs). For that, we utilize RF balanced/unbalanced transformers (called baluns for short), which are primarily used to match the impedance between the two VNA ports and the DUT''s input and output ports, for the two-port S-parameter measurements.