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UltraWideBand antenna design

Posted: Sat Jan 20, 2018 3:14 pm
by HighSNR
This might be of interest to some people. I designed and built an cheap ultra-wideband directional antenna for use with my SDR.

The antenna is good from about 800MHz up to about 6GHz(perhaps beyond). There are plenty of signals up in these bands such as ADSB, GPS, WiFi and tons of GSM, UMTS and LTE etc. This is a great antenna for picking up any one of these.

My writeup is here in 3 parts.

https://hexandflex.wordpress.com/2017/1 ... tenna-pt1/
https://hexandflex.wordpress.com/2017/1 ... na-part-2/
https://hexandflex.wordpress.com/2017/1 ... rformance/

I have a small number availiable on my Tindie store if anyone would like to give it a try.

Re: UltraWideBand antenna design

Posted: Sat Feb 17, 2018 2:35 pm
by Stry
Just ordered one, thanks!

Re: UltraWideBand antenna design

Posted: Wed Feb 28, 2018 10:32 pm
by HighSNR
My antenna was recently tested by AntennaTestLab

Please find the results here
http://antennatestlab.com/ antenna-examples/example-7- antipodal-vivaldi-antenna- exponential-slot-edge-pcb?utm_ source=HexAndFlex

And my own interpretation of the results here.
http://hexandflex.com/2018/02/28/ultra- ... asurements

The measurement go all the way up to 18GHz. I am fairly please with the results. A quick sample below.

Image

Re: UltraWideBand antenna design

Posted: Sat Apr 14, 2018 11:48 am
by Username
Does it is possible to receive the Radar Signal? We have here a Handfull Airports in my Area who the Radar Tower is in clear sight from some hill?
The same for directional Radio Beams who are go to an Tower who have an Platform below. :D

Re: UltraWideBand antenna design

Posted: Sun Apr 15, 2018 4:01 pm
by HighSNR
I'm not familiar with the frequencies airport radars use(other than the 1090MHz SSR/ads-b).

But my guess would be that it probably will.

Re: UltraWideBand antenna design

Posted: Mon Apr 16, 2018 6:36 am
by snn47
Frequencies will vary with region and if you have weather, civil or military Radar Towers in view. Except the L-Band Radars ~1215 - 1400 MHz, most other Radars are above 2700 MHz.

Re: UltraWideBand antenna design

Posted: Mon Apr 16, 2018 10:58 am
by Username
Radar here is:
1.215 - 1.350
3.100 - 3.400

Re: UltraWideBand antenna design

Posted: Tue Apr 17, 2018 1:29 pm
by HighSNR
So for those frequencies it should work well in the 3.1 to 3.4GHz band.

At 1.2 to 1.4GHz this antenna will work and is efficient, but doesn't provide any directionality over and above that of a normal dipole. Still useful IMO

Re: UltraWideBand antenna design

Posted: Fri Apr 20, 2018 4:13 pm
by Username
I dont care where the Signal is coming from.
in the Kit for the Tripod are both antenne the same?!
On the Picture one look different:
Image

Re: UltraWideBand antenna design

Posted: Tue May 01, 2018 9:10 pm
by Username
So I ordered one for a Tripod but what kind of Screw does I need to fit on?
I havent any and I know there are different diameters for.