Bandpass filter having magnetically coupled resonators

Details Bandpass filter having magnetically coupled resonators Bandpass filter having magnetically coupled resonators

1987-03-02

1990-01-16

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

333185, H03H 709

Patent

active

048946290

ABSTRACT:
A bandpass filter comprising a plurality of resonators coupled by a magnetic induction coupling. Each of the resonators includes an equivalent circuit having an LC series circuit and a capacitance element connected in parallel, the LC series circuit including one capacitance element and two inductance elements connected in series to both sides of the one capacitance element. This construction realizes the magnetic induction coupling by utilizing the inductance elements constituting the resonators, without necessitating a separate coupling means such as a capacitance element.

REFERENCES:
patent: 4157517 (1979-06-01), Kneisel et al.
patent: 4203081 (1980-05-01), Braeckelmann
patent: 4451804 (1984-05-01), Veisz et al.
patent: 4591814 (1986-05-01), Ito et al.
patent: 4601062 (1986-07-01), Hettiger
patent: 4614925 (1986-09-01), Kane
patent: 4754242 (1988-06-01), Okamura et al.

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