【Directional coupler circuit design function】 ●〜It designs directional couplers of rat race rings, branch lines, and coupled couplers.〜 ● ● It can conduct design with electrical length line, micro strip, and strip line. ● The degree of coupling and port impedance can be specified. ● Dimensions are designed with consideration of discontinuous component of Tee junction.

【Example of 5.6GHz 5dB rat race ring design （micro strip）】 ● ● This is an example of design of a rate race ring with the degree of coupling at 5 dB at 5.6 GHz with micro strip. ● The phase between outputs is designed at 180 degrees. ● It can be found that the thickness of the ring is not constant because the degree of coupling is not 3 dB. ● The degree of coupling at 5.6 GHz is 5 dB and isolation is efficiently afforded according to the graph. ● Dimensions are designed with consideration of the discontinuous component of the Tee junction.   ● It can be changed to a round corner at the circuit editor side if necessary. 【Example of 1200MHz branch line coupler design （micro strip）】 ● ● This is an example of design of a 1.2 GHz and 3 dB branch line with micro strip. ● It can be found that the degree of coupling is 3 dB and isolation is efficiently afforded according to the graph. ● Dimensions are designed with consideration of the discontinuous component of the Tee junction. 【Example of 10GHz 15dB directional coupler design （micro strip）】 ● ● This is an example of design of a coupled coupler with the degree of coupling at 15 dB at 10 GHz. ● It can be found that the degree of coupling is 15 dB and isolation is efficiently afforded according to the graph. Top of the Page Copyright(C) 2000 MEL Inc.