Sp. Yeo et Lj. Tan, SYMMETRICAL N-PORT MICROSTRIP RING COUPLERS, International journal of microwave and millimeter-wave computer-aided engineering, 6(2), 1996, pp. 100-106
The present article describes the use of a unified eigenmode approach
for the analysis of the symmetrical N-port microstrip ring coupler (wh
ere N can take on any positive integer value). Experimental tests on s
ample prototypes have confirmed that the resultant model is able to ac
curately predict the performance characteristics of this family of cou
plers. (C) 1996 John Wiley & Sons, Inc.