Extensive Study of Microstrip Directional Coupler Directional Coupler

摘要

In the last decade a tremendous changes has beennoticed in the field of radio frequency (RF) as well as themicrowave communication systems. Directional couplers arecomprehensively microstrip couplers are indispensable RFcomponents which are used along with the patch antenna, slotantenna, spiral antenna, dielectric resonator as well as antennaarrays for the purpose of circular polarization as well asdirectrion finding applications. In this paper the review overlatest trends which are based on directional couplers is present.Directional couplers are also used for the designing purpose ofthe amplifiers, mixers as well as modulators. Since, the couplersare quite simple as well as precise components which can beused for the measurement of microwave signal samples. Thispaper reviews the designs of microstrip/stripline based designs,single section/two section couplers and coupled/uncoupledtransmission lines introduced in between the coupled linesections.Multi section coupled line couplers provide increasedbandwidth.