Variable frequency and coupling equalizer and method for tuning

Claim 3

The method according to claim 1 wherein said reference settings of said first and scond controls of each said section constitute respectively lowest resonant frequency and minimum coupling of signal energy, and the intial setting of said second control of said first section constitutes a setting to maximum coupling, and wherein said first control of said first section is varied away from minimum after the setting of the associated second control to maximum to effect a response with the system spectrum.

Claim 4

The method according to claim 1 wherein each succeeding equalizer section to be tuned is adjusted to have the response thereof associated with the portion of the system frequency spectrum adjacent to that portion corresponding to the previously tuned section, and wherein each portion of the entire system operating frequency spectrum is associated to an equalizer section.

Claim 5

The method according to claim 1 wherein the tuning of each equalizer section to a predetermined portion of the system spectrum is effected within the predetermined range of response levels desired for that portion of the spectrum.

Claim 6

The method according to claim 4 wherein said fine tuning is provided to average the high and low portions of the collective response and thereby form a substantially flat response throughout the system operating frequency spectrum.

Claim 7

A variable equalizer comprising first means providing a rectangular cavity operatively coupled to a source of signal energy and having a longitudinal axis of symmetry, means for varying the resonant frequency of said cavity, said resonant frequency varying means including a sliding short arranged within said rectangular cavity to be controllable from one end thereof and to be movable longitudinally along said axis from said one end for varying the cavity size, and means for varying in a continuous manner the coupling of the signal energy to said cavity, said means for varying the coupling of the signal energy to said cavity including an iris coupling with an adjusting screw arranged to be externally position-adjustable within the plane of the iris opening, said means for varying the resonant frequency and said means for varying the coupling providing substantially independent variable control of said equalizer, wherein said first means is coupled to circulator means, with said circulator means being part of a transmission line for the signal energy coupled to said first means, and said circulator means being coupled to said rectangular cavity at the end of said cavity opposite said frequency varying means relative to said longitudinal axis, and wherein said means for varying the coupling of the signal energy to said cavity are positioned within the portion of said cavity proximate said circulator means.

Claim 8

A variable equalizer comprising first means providing a rectangular cavity operatively coupled to a source of signal energy and having a longitudinal axis of symmetry, means for varying the resonant frequency of said cavity, said resonant frequency varying means including a sliding short arranged within said rectangular cavity to be controllable from one end thereof and to be movable longitudinally along said axis from said one end for varying the cavity size, and means for varying in a continuous manner the coupling of the signal energy to said cavity, said means for varying the coupling of the signal energy to said cavity including an iris coupling with an adjusting screw arranged to be externally position-adjustable within the plane of the iris opening, said means for varying the resonant frequency and said means for varying the coupling providing substantially independent variable control of said equalizer, wherein said first means is coupled to circulator means, with said circulator means being part of a transmission line for the signal energy coupled to said first means, and said circulator means being coupled to said rectangular cavity at the end of said cavity opposite said frequency varying means relative to said longitudinal axis, and wherein said means for varying the coupling of the signal energy to said cavity are positioned within the portion of said cavity proximate said circulator means.

Claim 9

The variable equalizer according to claim 6 wherein said first means includes a plurality of cavities, each having individual means associated therewith providing said substantially independent variable controls, each of said cavities being coupled in one-to-one correspondence to a plurality of circulators, the latter being coupled directly in cascade to form a transmission line for signal energy.