Application of Periodically Loaded Paralell Coupled Lines

In 2009, the author has proposed a periodically-loaded coupled line to realize a novel trans-directional coupled-line coupler. Due to the separation of input and output ports, the crossover issues faced by contradirectional couplers can be avoided and DC blocking is easy to be achieved between the input and output ports since they are on different lines. Therefore, it is easier to connect to active devices. The purpose of this proposal is to extend our work in periodically-loaded coupled-lines. The general analysis of parallel coupled-lines is derived. The formulation of the periodically-loaded parallel coupled-lines is also given by Bloch mode theory. The advantage of trans-directional coupled-line couplers are utilized to design Marchand baluns, Butler matrices and reflection type phase shifters. Other applications of periodically-loaded coupled-lines are also given.

Project ID:PB10007-7241
External Project ID:NSC100-2221-E182-061