No name antenna 27+ dbi

[Mishka 10]

It's intersting to put it into a parabolic dish.

[Admin 2545]

27 minutes ago, Mishka said:

It's interesting to put it into a parabolic dish.

,,, after I rotate the SMA port, I will do that too ... !!!

[Mishka 10]

On 12/17/2020 at 1:35 PM, Mishka said:

For curiosity I've built the cocoaNEC generated dual-band LPDA...

Measurements:

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Aieee! I used diameter value in the place of radius in my #cocoaNEC code. Stupid me! Realized this when worked on another antenna.

After changing the NEC model to actual wire gauge (S = 2.5 sq.mm, measured D = 1.66 mm, R = 0.83 mm, but NEC code was optimized for R = 1.7 mm) it became exceptionally accurate! At 2400 MHz, both real (see VNA data inside the spoiler) and modeled values differ by just 0.01 for VSWR and 0.3dB for return loss! This also explains impedance mismatch.

Going to rebuild the antenna now.

[Admin 2545]

LPDA 1,7-2,7 GHz

 

 

[Uyek 0]

On 10/17/2022 at 2:13 PM, Admin said:

LPDA 1,7-2,7 GHz

 

 

 

 

 

can this LPDA element be replaced with galvanized so that it is easy to make and make an indentation of 75 ohms

[Admin 2545]

galvanized sheet, no...!!!