UHF HELICAL DIPLEXER FIXTURE FOR PRODUCTION TEST AND TUNE
Original Publication Date: 1998-Mar-01
Included in the Prior Art Database: 2002-Jul-01
This fixture enables the testing and tuning of a production helical diplexer filter unit in a produc- tion environment. The physical contiguration and electrical operating frequency (UHF) of the device to be tested places severe constraints on its testability. The apparatus achieves a successful balance between the demands of an electrically correct connection exhibiting a high degree of repeatability in the 450 MHz frequency range, while overcoming the difficulties encountered in the tuning and evalua- tion of the tested device in a demanding production environment. Through the application of creative mechanical techniques and microstrip technology, a great number of leaded helical diplexers may be evaluated quickly and reliably for their intended application in a production transceiver. Furthermore, consistent results are attained through the implementation of a robust ground signal connection scheme.