Patent ID: 7952439

Claim:
A system for cross-coupling in both phase and magnitude the outputs from similar microwave oscillator sources by inputting their outputs Into two ports of a modified waveguide magic tee power combiner, the modified magic tee power combiner comprising: a. a magic tee power combiner having four ports such that if oscillator inputs to ports 1 and 2 are cross-coupled in phase and magnitude, then the combined power of the inputs will be output from port 3 and no power will exit port 4 ; b. a matched load connected to port 3 and port 4 ; c. similar first and second microwave oscillator sources; d. a partial obstruction with a reflection coefficient Γ located between port 3 and the matched load, said obstruction causing a reflected signal with a phase-locking power PL, an amplitude α, and a phase designated as φΓ where Γ=αe −jφΓ ; and e. a requirement that the total phase difference φ 1 between said first oscillator source and said partial obstruction is equal to φWG 1 +φΓ and has an electrical phase length equal to n2π, where n is an integer and φWG 1 is the phase due to the waveguide length between a reference plane of the partial obstruction and a reference plane of said first oscillator and a similar requirement for φ 2 of said second oscillator, whereby said oscillator sources are coupled to each other by means of the signal reflected from said partial obstruction thereby obtaining a single coherent microwave output from port 3 having a power level approximately twice that of the two microwave sources.