Abstract
AbstractA design of compact rat‐race coupler (RRC) with very wide‐range spurious suppression is presented using transmission line (TL) based asymmetric single stub‐tapped stepped‐impedance units. The main advantages of proposed unit are 2fold. First, unlike regular single stub TL units, the present unit facilitates realizable high (low) impedance values for smaller electrical length series‐arm (shunt open‐stub) resulting in great extent of size reduction (harmonic suppression) without degradation in coupler bandwidths. Second, the number of open‐stubs in the RRC can be reduced to three by connecting the proposed units back‐to‐back, which is not possible in using other TL units. Theoretical analysis is provided with design equations and graphs. A prototype high performance compact RRC at f0 = 0.5 GHz, targeted at a size reduction of about 75% and ultra‐wide range suppressed harmonic response, extended up to 12f0, is demonstrated with good 20 dB return loss bandwidth of 26%.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
