HP a-131 free download

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NETWORK ANALYSIS OF FIXTURED DEVICES Jim Curran Network Measurements Division 1400 Fountaingrove Parkway Santa Rosa, CA 95401 RF & Microwave Measurement Symposium and Exhibition F/;;' HEWLETT ~~ PACKARD www.HPARCHIVE.com ABSTRACT Transistors and other active devices often must be mounted in some type of fixture to be measured by an automatic network analyzer. However, suitable in-fixture calibration standards often are not available to calibrate the network analyzer system; it becomes necessary to have a method to correct the measured data for errors caused by the fixture. Some of these errors can be characterized and removed while other errors may be the result of some instability in the fixture itself. This paper describes some techniques which may be useful for measuring fixtured devices; including a discussion of the concept known as "de-embedding". Two basic approaches for separating fixture effects from actual device data will be discussed. While not universal, these techniques can accommodate many fixturing applications, particularly if certain attributes are included in the design and fabrication of the fixture. Author: Jim Curran, Applications Engineer, Hewlett-Packard Network Measurements Division, Santa Rosa CA. BS Electrical Engineering (1981), University of Illinois, Urbana-Champaign. MS Electrical Engineering (1984) and Master of Engineering Management (1984), Midwest College of Engineering. The author has been with HP since 1984 as an applications engineer for the HP 8510 microwave network analyzer, specializing in the areas of semiconductor network measurements and accuracy enhancement techniques. www.HPARCHIVE.com NETWORK ANALYSIS OF FIXTURED DEVICES 5178 Automatic network analyzers (ANA's), such as the HP 8510 and HP 8753, can make direct measurements when calibration standards with the same connector type as the device under test exist. Many devices cannot be directly connected OUTLINE to the coaxial test ports of a network analyzer and require a transitional mounting fixture for