Can somebody suggest me on why to find the impedance of the antenna after designing in a software then how to know whether to use impedance matching or quater wave transformation or impedance transformer etc so that the gain can be increased.
An antenna has to be matched to its feed otherwise power from the source, or power received by the antenna, will be reflected and wasted.
An antenna may have a resistive impedance, in which case a quarter wave transformer will be able to transform that to any other resistive impedance, like 50 or 75 ohms. The antenna may also have reactive impedance, in which case a capacitor, inductor, stub or other matching network may be needed as well as perhaps a transformer. Look up antenna matching on the internet. for instance
https://abracon.com/uploads/resources/Abracon-White-Paper-Antenna-Impedance-Matching.pdf
If you don't understand why an antenna has to be matched, then do the simple mathematics to work out how much power goes into a resistive load as its value varies, when it is driven by a voltage source in series with another resistor (a good model for a power supply).
Dear Abishek Senthilkumar
Generally, Impedance matching is designing source and load impedances to minimize signal reflection or maximize power transfer. In DC circuits, the source and load should be equal.
Although this link might be useful further, have a look
https://www.smeter.net/feeding/feed-lines-and-impedance-matching.php
Kind Regards
Qamar Ul Islam
Hi
For wave port, the impedance will calculate automatically using the actual port impedance you have for your structure so no need to renormalize and this usually what you have because in practice this will be the situation.
Please see the below link:
https://www.youtube.com/watch?v=TJdZUpTtabc
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