Impedance matching apparatus

Details Impedance matching apparatus Impedance matching apparatus

2007-03-19

2009-02-24

Jones, Stephen E (Department: 2817)

Wave transmission lines and networks

Automatically controlled systems

Impedance matching

C315S111210

Reexamination Certificate

active

07495524

ABSTRACT:
An impedance matching apparatus has: a storing portion70for previously storing, for plural positions which can be taken by a movable portion of a variable impedance element, allowable power values respectively corresponding to the plural positions of the movable portion; and an abnormality determining portion80for determining an allowable power value based on the present positions of the movable portion supplied from position detecting portions41, 42and the allowable power values stored in the storing portion70, for comparing the allowable power value with an input power value, and for determining that it is abnormal when the input power value is larger than the allowable power value. Accordingly, the calculation load during the matching operation can be reduced.

REFERENCES:
patent: 6946847 (2005-09-01), Nishimori et al.
patent: 2005/0184922 (2005-08-01), Ida et al.
patent: 6-11528 (1994-01-01), None
English language Abstract of JP 6-11528.

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