Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Distributive type parameters
Patent
1997-10-17
2000-01-25
Karlsen, Ernest
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Distributive type parameters
324 7627, 324 7644, 324 7629, G01R 1320
Patent
active
060182466
ABSTRACT:
A measurement method adjusts the IF bandwidth of a network analyzer to increase measurement speed for high dynamic range devices. According to the first preferred embodiment of the present invention, the bandwidth of the IF filter is adjusted for each corresponding measurement sweep of the network analyzer. The forward transmission and reflection characteristics of the device under test are measured using a first IF bandwidth, and the reverse transmission and reflection characteristics of the device are measured using a second IF bandwidth. When high measurement sensitivity of the forward transmission parameter of the high dynamic range device is sought, the first IF bandwidth is selected to be narrower than the second IF bandwidth. When high measurement sensitivity of the reverse transmission parameter of the high dynamic range device is sought, the first IF bandwidth is selected to be wider than the second IF bandwidth. According to the second preferred embodiment of the present invention, the IF bandwidth is adjusted for each separate measurement sweep corresponding to measurement of each of the forward transmission parameter, the reverse transmission parameter, the forward reflection parameter and the reverse reflection parameter.
REFERENCES:
patent: 4710702 (1987-12-01), Itaya
patent: 4816767 (1989-03-01), Cannon et al.
patent: 5075618 (1991-12-01), Katayama
patent: 5168213 (1992-12-01), Wardle
Dunsmore Joel P.
Marzalek Michael S.
Wood Susan D.
Hewlett--Packard Company
Imperato John L.
Karlsen Ernest
Solis Jose M.
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