Author : Ashish Tripathi

Hybrid tee is widely used component in microwave system, the four arms of a conventional Hybrid tee direct at four directions, which occupy much space and give inconvenience to the assemblage of a system. In this paper a design of waveguide having width =50.0 mm, Height =20.0 mm, Length=75.0 mm as well as solution frequency =4.0 GHz. Material assign for Hybrid tee is vacuum which relative permittivity =1 as well as relative permeability =1. We make four arms at different position, such as first arms located at position -25.0,-10.0, 0.0, second arms locate at position -25.0,-10.0, 0.0, third and fourth arms locate at position -25.0,-10.0, and 0.0. Each arm is 900 positions from each other’s.1800 ring hybrid coupler a type of coupler used in RF and Microwave system. Its simplest form it is a 3dB coupler and is thus an alternative to a Hybrid tee.RogersRT/duroid 5870™ is used which relative permittivity 2.33 used. HFSS is a high performance full wave electromagnetic (EM) field simulator for arbitrary 3D volumetric passive device Modeling. It employs the finite Element Method (FEM), adaptive Meshing and brilliant graphics. This paper reports for Hybrid Tee for S band that a signal incident on the different port split equally between port 2 and 3, but the resulting signal are 1800 out of phase. Also 1800 Ring Hybrid Coupler for S band is a four port networks with a 1800 phase shift between two output ports but it can also be operated so that output port are in phase. Both the Structures are first designed using HFSS and then Simulated.

Keywords: Microwave system, waveguide, hybrid coupler.