Antenna matching circuitries

Информация о материале

Автор: Super User

Родительская категория: Заметки

Категория: Электроника / cхемотехника

Создано: 18 мая 2022

Обновлено: 02 июня 2022

Просмотров: 971

For tune the antenna matching circuitry we need:
1. To tune (match) the feeder line at the one side of feeder (ex. 50 Ohm) with vector Analyzer (there are two common types of LC matching cirtuinries below), the feeder this time is loaded with 50 Ohm resistance. (now load is feeder line, terminated with 50 Resistor)
2. To match the antenna with the second side of the feeder using a similar approach  (now load is antenna)
So both sides of the  feeder  line ideally must be tuned.

Like easy guide how to tune feeder line to load using the Smith's diagram will put this picture from a very handy  "Antenna Design and RF Layout Guidelines" below
There are several different possibilities to match, which are depend of start point on Smith's diagram. There are several pictures like guidelines below:

-----------------------------------------------------------------------------------------



-----------------------------------------------------------------------------------------------

-----------------------------------------------

-------------------------------------------

-----------------------------------------------------------------------------------



------------------------------------------------------------


--------------------------------------------------------------------
Also see: https://www.ti.com/lit/an/snoa519b/snoa519b.pdf