H - Electricity – 03 – F
Patent
H - Electricity
03
F
H03F 3/189 (2006.01) H01P 5/02 (2006.01) H03H 11/28 (2006.01)
Patent
CA 2041729
Abstract of the Disclosure An input matching network in an input circuit of an amplifier comprises a basic input matching circuit including a serial inductance, a strip line of an approximately quarter wavelength connected in series to the basic matching circuit, and a parallel capacitance including an open stub connected between the strip line and the basic input matching circuit. An electrical length of the open stub is selected such that a phase angle of a signal source reflection coefficient as viewed from the amplifier is larger than a mean value of manufacturing variations of a phase angle of an optimum signal source power reflection coefficient of the amplifier. By shortening the electrical length of the open stub by cutting it by a laser, a matching point can be adjusted to comply to substantially entire distribution of the manufacturing variations of the optimum signal source power reflection coefficient of the amplifier.
Marks & Clerk
Sumitomo Electric Industries Ltd.
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