HARMONIC FILTER OF SHORT-WAVE TRANSMITTER Russian patent published in 2015 - IPC H03H7/12 

FIELD: radio engineering, communication.

SUBSTANCE: harmonic filter of a short-wave transmitter includes N LC filters switched as to input and output by means of input and output switches, each of the above filters includes the first and the second inductance coils in longitudinal arms, which are connected to each other, and a capacitor connected between the connection point of inductance coils and a common bus, as well as a capacitor of variable capacity, which is common for all LC filters, and to each LC filter there introduced is an additional inductance coil connected parallel to the capacitor and simultaneously connected to the capacitor of variable capacity through one of N additionally introduced switches, and the first inductance coil in each LC filter is inductively connected to the second inductance coil; with that, magnetic fluxes of the inductively connected inductance coils are directed towards each other.

EFFECT: providing coordination within the whole working range of frequencies of a radio transmitter at simplification of adjustment processes.

2 cl, 1 dwg