The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun.
![]() If a Ferrite Balun is used, the balun needs to be rated at least twice the operating wattage to prevent the balun from overheating. This will help mitigate mismatches and stray RF due to using the antenna at frequencies other than what the antenna was specifically designed for. Dimensions will change slightly due to antenna height and ground conductivity variations.and Keep The Antenna Away From Power Lines. They are good at turning you into The Squirrel in the Substation. The best way is to copy and paste the circuit schematics by right mouse clicking under the Project Tab-Circuit Schematics-Your Schematic Name and select Duplicated. The basics of operation is to generate a magnetic field out of phase with an electric field with a ratio that impedance matches with the air (377 Ohms). The general dimensions are 2, however due to the specific dynamics of the antenna and the fringing fields, the exact dimensions require more careful calculations. Numerous reference books contain equations for antenna design for many types of antennas. We will first focus on the basic patch design and then examine impedance matching techniques. Patch Antenna Dimension Calculator How To Optimize YourYou will need to try adjustments in the simulation to get a feel for how to optimize your design for 950 MHz. The file has loaded the default enclosure (surrounding space) and many of the fabrication properties. To resize, you can double click the rectangle and you will see blue dots appear at the corners. While dragging if you hit the space bar, a window will come up that allows you to type in the dx and dy of the new rectangle. If you just added a port to one side of the patch, AWRNI would stimulate the entire edge. To better approximate a real t-line port, draw a very small rectangle, 2.3mmx.1mm and place it at the center of the patch where the feedline would go. To measure the resonance, Project- Add Graph and then add measurement Linear-Zin. You will need to set the frequencies at which to simulate: Options-Project Options. Select a start and stop frequency to sweep over and the increment, then hit Apply. Also, use 0.1 GHz as your increment, then refine until you can find a smooth curve, with a clear peak. At resonance (radiating frequency) the input should be real, and typically much higher than 50 Ohm this is due to the patch structure, not antennas in general, however the real input impedance at resonance is a general property. It is a calculator to help you convert electrical parameters such as electrical length and impedance to a physical implementation. To find a transmission line from electrical length, insert all of the the parameters on the left. Also set Dielectric Constant4.5, ConductorCopper, Height1.53 mm, Thickness30um. These are obtained from the PCB stackup we are using in the workshop. Note that the Height and Thickness are set on the right side, even though we are calculating from left to right in this example. Click the right arrow it will calculate the width and length to the line. Likewise, if you change the Length or Width on the right side and click the left arrow, it will calculate the new Electrical Length and Impedance. Now insert a MLIN with the correct length and width in mm from TXLINE and add a 50 ohm port. You can now simulate, using a Smith chart, the input impedance to the t-line.
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