Patent ID: 6963254

Claim:
A uniform coupling device to be installed with a nonreciprocal resonator showing a circular symmetry, comprising: A) an outer feeder network consisting of an N-fold binary divider showing a circular symmetry coincident with that of said nonreciprocal resonator, where N is a non-negative integer, B) an inner feeder network consisting of a radial branch rendering M branch arms of an equal electrical length and a common vertex coincident with the center of said nonreciprocal resonator, where M is an integer no less than 1, C) electronic switches of a predetermined type or types at predetermined position or positions distributed with said outer feeder network, if N>0, and said inner feeder network, if M>1, to result 2 N paths and M paths, respectively; wherein by electrically coupling in/out said outer feeder network and said inner feeder network with said nonreciprocal resonator, distinct overall electrical paths result, each of which is characterized by a unique phase with nominally the same insertion loss, thereby realizing the desired uniform coupling operation of said uniform coupling device.