UWB circular antenna: input impedance (Zo= 50 Ω)

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Lufer17

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Feb 22, 2020
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I'm having difficulty with the line input impedance of the circular planar antenna signal. Its impedance is 117 ohms and the correct is 50 ohms, I am not able to lower the value. I made modifications to the input increasing the line width and also made an impedance transformer. When I get it down, the whole process on the antenna I made is impaired. Example: reflection coefficient is lost, surface current loses efficiency and also its power and directivity. Please can someone help about this. 80819

look me value

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KE5MC

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I have no experience designing antennas. However, I notice the impedance is flat over a wide frequency span. I find that suspicious as in to good to be true.
 

Lufer17

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Feb 22, 2020
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Hello So I took a scientific article to insert all the static data felt in the antenna simulator and really the impedance value passed above 50 ohms.

Note: I made two antennas. 1st I did with my calculations.
2nd is from the scientific article [the data you enter in the forum was from the scientific article, because the 1st ran the same problem].
3 logically the scientific article should have a value of 50 ohms.

Reference article < click here
 
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