Compact high directivity branch‐line hybrid using distributed realization of lumped elements

Author:

Nishad Praween Kumar1ORCID,Ghosh Debapratim1

Affiliation:

1. School of Electrical Sciences Indian Institute of Technology Bhubaneswar Orissa India

Abstract

AbstractThis letter presents a compact high directivity branch‐line hybrid. The proposed hybrid is designed using a symmetrical ‐shaped structure, which incorporates a symmetrical ‐equivalent circuit. The ‐structure comprises one series low‐impedance line and two shunt high‐impedance stubs. The low‐impedance line is realized using a ‐equivalent circuit consisting of two spiral inductors and one patch capacitor. A detailed analytical design procedure is developed. A prototype hybrid is fabricated on FR‐4 substrate and the measured ‐parameters are in close agreement with the simulated results. The proposed hybrid has a compact size with 54% area reduction compared to a conventional branch‐line hybrid. In addition, the hybrid achieves 43 dB directivity at its center frequency of 0.9 GHz.

Publisher

Wiley

Subject

Electrical and Electronic Engineering,Condensed Matter Physics,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

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