SELECTIVE PROTECTION DEVICE ON RECIPROCAL RODS Russian patent published in 2012 - IPC H01P1/22 

FIELD: electricity.

SUBSTANCE: protection device contains coupled rod resonators (positioned inside the body and reciprocally connected) that are short-circuited at one end and open-circuited at the other. Terminal resonators are joined to the device input and output with a conductive communication line via HF coaxial connectors positioned inside the body. Included into the resonators terminal relative to the body are limiting microwave diodes arranged in couples and symmetrical relative to the point of the conductive communication line connection to the resonator. The device setup is performed with the help of the readjustment screws positioned inside the body on the side of the resonator open-circuited ends. The limiting diodes protect the subsequent cascade against breakdown in the high input signal mode, in the low signal mode (<5 mWt) the device operating as a regular band-transmission filter.

EFFECT: increase of the input signal minimum allowed power and improvement of the protection device selective properties during smooth adjustment of frequency and standing-wave ratio in the reception mode.

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