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Mohammad Javad Tavakoli
Electrical Engineering Department, Shahed University, Tehran, Iran
Environmental Science

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Wideband Directional Coupler for Millimeter Wave Application based on Substrate Integrated Waveguide Mohammad Javad Tavakoli; Ali Reza Mallahzadeh
Emerging Science Journal Vol 2, No 2 (2018): April
Publisher : Ital Publication

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (894.099 KB) | DOI: 10.28991/esj-2018-01132

Abstract

Recently, Substrate Integrated Waveguide (SIW) techniques have been noticed for millimeter wave devices in microwave applications. In this paper, we are developing a wide band directional 3 dB coupler with a phase of 90̊ phase delay in the range of 30-40 GHz based on periodic vias and multi hole structure. For achieving this wide bandwidth multi-section coupler is designed based on the theoretical modeling and the simulation result is compared with HFSS and CST with  two different  numerical  methods show good performance with low insertion and return loss, broad operational bandwidth and high isolation. A fractional bandwidth is about 28.5 %.
Co-Authors Ali Reza Mallahzadeh