Abstract
In this article, 60 GHz directional coupler is designed by using Substrate Integrated Waveguide (SIW) technology using Coplanar waveguide as a transmission path. To design directional coupler RT duriod 5880 substrate material is used. Here directional coupler is analyzed by changing the thickness of copper coating and height of the substrate. By changing the thickness of copper coating and height of substrate examining the directional coupler results like reflection coefficient, insertion loss, coupling factor, isolation loss, VSWR, surface current, Electric field and magnetic field variations. Verifying the thickness and height of substrate is suitable for RADAR application in millimeter frequency range. RT duriod 5880 substrate material height is 0.508mm and thickness of 0.035mm are chosen to design directional coupler. At 60 GHz directional coupler gives reflection coefficient as -36.03 dB, insertion loss as -1.3 dB, coupling factor of -6.3 dB and isolation loss of -36 dB.
Highlights
Due to the incorporation of a wireless communication system in many applications high bandwidth is required
By simulating the proposed directional coupler getting results are shown in fig
The surface current distribution of a directional coupler is shown in fig
Summary
Due to the incorporation of a wireless communication system in many applications high bandwidth is required. Bandwidth require and less delay, low loss, compact size and high packing density is required. At higher frequencies availability of high free spectrum is required. All these requirements are fulfilled by millimeter frequency range (30 GHz – 300 GHz) [5], [6]. FCC announces 59GHz to 64GHz is used for RADAR application. In this frequency range 60 GHz plays a muchdominated role. To design millimeter wave frequency components Substrate Integrated Waveguide (SIW) technology most suitable one. Fig .1 shows a basic block diagram of the basic RADAR system [7]
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