Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Distributive type parameters
Patent
1998-07-15
1999-09-07
Do, Diep
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Distributive type parameters
324634, 73 232, G01N 2200
Patent
active
059492376
ABSTRACT:
In a microwave resonator for continuous spectroscopic gas analysis with a microwave cavity having dimensions depending on the operating frequency and a setting for a low quality Q of its base mode and microwave reflectors disposed at its opposite ends and including a round hollow conductor part and a co-axial conductor part separated by a pressure-tight dielectric window, an internal conductor part is axially movably supported in the coaxial conductor part by the microwave reflector at one end of the co-axial conductor part, the other reflector being axially movable for tuning the resonator to a maximal absorption frequency and a by-pass line extends past the co-axial conductor part in the area of the dielectric window and has a short branch connected to the co-axial conductor part and including a restrictor for supplying only a relatively small flow of gas from the bypass line to the conductor part of the microwave resonator.
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patent: 5548217 (1996-08-01), Gibson et al.
D. Dortmann et al., "Die Mikrowellenspektroskopie, ein neues System fur die Bestimmung von Ammoniak in Rauchgasen", VGB Kraftwerkstechnik, vol. 72, nr. 1, Jan. 1992, pp. 65-69.
Paulus, "Selektives Messen in der Prozessanalytik mit dem Mikrowellenprozessanalysator Mipan", Technisches Messen TM, vol. 58, nr. 11, Nov. 1, 1991, pp. 433-438.
Berger Lutz
Koniger Franz
Metzger Hans-Dieter
Schmitt Gerhard
Bach Klaus J.
Do Diep
Forschungszentrum Karlsruhe GmbH
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