Patent ID: 7586383

Claim:
A system to automatically tune multicavity filters of high frequency (HF) signals, comprising: at least one filter body with a plate which includes said cavities and is crossed by metallic tuning screws having heads sticking out of said plate and stems penetrating into one of said cavities, said system including: at least one arm for coupling and moving said tuning screws to adjust the resonant frequency of each corresponding cavity; a subsystem (SUB- 1 A) of driving and robotized movement of said screws as well for the regulation of the entity of their penetration inside the cavity, consisting of at least one frictioning device (MF- 1 ) and at least one fine tuning regulation device (MRS- 2 ); a measuring subsystem (SUB- 2 MI) for the real time measurement of scatter parameters S 1 , S 2 . . . Si, . . . SN (N being the number of tuning screws), the measuring subsystem comprising a VNA (Vectorial Network Analyzer), adapted to measure the real-time frequency response of an under-test filter (DUT); a subsystem SUB- 3 C for comparing the values S 1 , S 2 . . . Si, . . . SN measured by SUB- 2 MI with parameters of reference Sri generated by a reference parameter-generating subsystem SUB- 4 G; and a subsystem (SUB- 5 ) comprising a controller (CONT) enslaved to SUB- 4 G for controlling the means included in SUB- 1 A and SUB- 5 , wherein the subsystem SUB- 3 C compares the real-time frequency response from SUB- 2 MI with a reference frequency response recorded in a non-volatile memory of SUB- 4 G and feeds the results of the comparison as MSE (Mean Square Errors) to the controller (CONT) of SUB- 5 .