Second-harmonic-wave choking filter

Details Second-harmonic-wave choking filter Second-harmonic-wave choking filter

H - Electricity

03

H

333/67

H03H 7/01 (2006.01) H01P 1/203 (2006.01) H01P 1/212 (2006.01)

Patent

CA 2004398

ABSTRACT OF THE DISCLOSURE A strip-type second-harmonic choking filter is constituted such that a main transmission line, through which a fundamental frequency wave is to be transmitted, is connected with a first stub which exhibits a first susceptance value for the fundamental frequency and exhibits a substantially infinite admittance value for a second-harmonic of the fundamental frequency, on a side of said main transmission line; and a second stub which exhibits a second susceptance value which is essentially a conjugate of the first susceptance value for the fundamental frequency and exhibits an infinity or zero admittance value for the second-harmonic frequency, at an opposite side of the transmission line from the first stub. For the fundamental frequency wave, the two stubs cancel the effects of each other so that no effect is given on the transmission of the fundamental wave, while one or both of the stubs choke(s) the transmission of the second-harmonic wave. The stub may be bent so that more area is easily available for circuits to be installed on the same circuit board.

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