![]() ![]() In this post, the open-source tool Qucs and the commercial electromagnetic solver HFSS is used to chose the lumped element components to match an antenna. There’s a couple ways to optimize the performance of a low frequency antenna (ie: less than 6GHz). If possible, simply place the matching network as close as possible to the antenna. As an important note, the waveguide length between the matching network and the antenna interface is important so be sure to take that into account. The touchstone file contains both the magnitude and phase information of the antenna return loss. This measurement is generally saved as a touchstone file for simulation, which will be used in our model. Since it’s typically a 1 port device, the measurement would be simply the return loss or VSWR. A VNA is used to measure the scattering parameters of the antenna. Whether you have measured or simulated an antenna, that data can be used to create the matching network. How is the feed matching network constructed? In this case, the matching strategy changes depending on the type of waveguide selected. It’s also a good rule of thumb to use 0402 components or smaller whenever possible.įor higher frequency antennas, waveguide is highly recommended to be used to match the antenna. It is best not use them over 6 GHz otherwise other factors become more significant. Lumped element components are idea for lower frequency antennas.
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