Patent ID: 6529844
Filing Date: 2003-03-04
Classification: G01R,H03L

Abstract:
A vector network analyzer (VNA) comprising:a first test port; a second test port; a third test port; a first signal source; a fist switch having a common terminal coupled to the first signal source, a first connection terminal coupled to the first test port and a second connection terminal coupled to the second test port; a first coupler having a through path coupling the first test port to the first connection terminal of the first switch, and having a coupling path terminal; a second coupler having a through path coupling the second test port to the second connection terminal of the first switch, and having a coupling path terminal; a third coupler having a through path coupled one end to the third port, and having a coupling path terminal; a downconverter; and a second switch having a common terminal coupled to the downconverter, a first switching terminal coupled to the coupling path terminal of the first coupler, a second switching terminal coupled to the coupling path terminal of the second coupler, and a third switching terminal coupled to the coupling path terminal of the third coupler.