BAND-PASS LC-FILTER WITH CONTROLLED TRANSMISSION BANDWIDTH Russian patent published in 2010 - IPC H03H7/12 

FIELD: physics.

SUBSTANCE: band-pass LC-filter with controlled transmission bandwidth which consists of first and second inductor coils whose first leads are connected to a first capacitor and a third inductor coil whose second leads are connected to a common bus, also contains fourth and fifth inductor coils, second and third capacitors and two varicaps, where the fourth inductor coil is connected to the input potential terminal of the filter and the second lead of this coil is connected to first leads of the second capacitor and the first varicap. The fifth inductor coil is connected to the output potential terminal of the filter and the second lead of this coil is connected to first leads of the third capacitor and the second varicap. Second leads of the varicaps, second and third capacitors are connected to the common bus.

EFFECT: control of transmission bandwidth during operation.

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