The design of 474~858 MHz signal strip line directional coupler

Directional couplers are the basic parts of many microwave systems [1,2]. Their importance comes from their many functions or applications. They are generally used as power splitters or multiplexers [3]. And its major application is in power combination or power division, especially in some microwave systems such as parts of antenna feeding networks, mixers or some balanced amplifiers [4,5] .