Abstract
A quad-channel high-temperature superconducting (HTS) diplexer with high isolation using spiral stub-loaded resonators (SSLRs) is presented in this paper. The quad-channel diplexer contains two paths with four SSLRs. Each path consists of two passbands that each passband shares two common SSLRs for size reduction. The SSLR structure of this study offers several design freedoms, such as the passband frequency can be adjusted by properly tuning its geometrical parameters and its bandwidth can be controlled through changing the coupling coefficients between the adjacent SSLRs. Moreover, a T-junction matching network is designed to minimize the undesired interactions between the two paths of the diplexer. To verify the designed methods, an HTS quad-channel diplexer operating at 1.91/2.157/2.36/2.59 GHz is successfully designed and fabricated by using YBCO thin film on a 0.5-mm-thick MgO substrate and it shows a compact size of $0.16\,\lambda _{g}\times 0.23\,\lambda _{g}$ . The maximum insertion loss of four passbands is 0.28 dB and the isolation between channels at the four passbands higher than 50 dB is obtained by adopting T-junction matching network.
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.
