Abstract
The theoretical approach of a double-Lorentz (DL) transmission line (TL) metamaterial using even-odd mode analysis is presented for the application to a tri-band Branch-Line Coupler (BLC). This BLC is based on double-Lorentz (DL) transmission line (TL) metamaterial to achieve the tri-band property. The tri-band operation is achieved by the flexibility in the phase response characteristic of such transmission line. Since metamaterials are in symmetric form, this analysis utilizes superposition and circuit symmetry to solve for the structure’s scattering parameters. A design example of a triple band quarter wavelength DL TL suitable for GSM-UMTS applications is designed and evaluated by simulation using even-odd mode analysis to validate the proposed methodology at circuit level. Then, this simulated DL TL is used in the design of a tri-band BLC which is also being analyzed using even-odd mode analysis. This coupler exhibits transmission of 3 ± 0.5 dB, return losses and isolations larger than 14 dB, and a phase difference of ±90 ±3.5°.
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.
