The first terminal of the source will be then generated. To do this, go to "Modeling menu", select " Pick Point" then click on the outer edge of the inner conductor as shown below. Voltage source and load impedance To construct the voltage source, we need first to specify the source's terminals. You only need to change the inner radius to 33.5/2 mm and outer radius to 33.5/2+2 mm. PON For the outer conductor, follow the same steps as above. Select" Load from Material Library" then scroll down to Teflon (loss free), click "load" then "OK". Set the inner radius to 5.0 mm and outer radius to 33.5/2 mm. To do this, follow the same steps as for the inner conductor except the material type and radii will change. JUL.JUUS/ Sisung/Desktop/EEE322-2019-2020-Lab%231-Coaxial cable.pdf SST STUDIO SUITE Now, we need to construct the insulation material. In our example, the radius is to 5 mm and length of the line to 500 mm. To construct cylinder, go to "Modeling menu", select "Cylinder" then define the sphere parameters. Constructing Geometry: To construct the inner conductor of the line is modeled as a cylinder. The following steps explains the required steps to build your coaxial cable simulation in CST STUDIO SUITE (Microwaves module) 1. Huelve permittivity of Insulation between conductors Coaxial Cable Cross-section The operating frequency of the line is between 1 to 4 GHz. to simulate 20 138 log10 ( 2 The characteristics impedance of a coaxial line is given by Where, Da = Inside diameter of outer conductor De= Outside diameter of inner conductor - Polative nermittivity of insulation between conductors Therefore, Z_ must be equal to 50 the well matched condition. As a first check, we set R=50 N and Zo=502. 2 2/4įigure 1: Circuit schematic of a quarter-wave transformer Later, we will change the length of the line to 0.52, 0.752, 1 and 1.51, with 2 being the wavelength of the propagating wave. We will use a quarter-wavelength transformer to easily analyze the load output parameters. We will also animate the 3D-electric and magnetic fields of the coaxial cable so we can check if it is well matched to the load or not. CST STUDIO SUITE Lab # 1 Transmission Line Simulations: Coaxial Cable Aim: To simulate the output parameters of a load impedance, load voltage, current, and the VSWR values.
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