How To Build A Ground Plane Antenna For ADS-B 1090MHz Spider Antenna

[@MrOndrejHruska]

Thanks for the tutorial! I built it similarly, but making a copper wire ring with the 6.8cm spikes soldered to it, it then fits on a panel-mount BNC socket, under the nut. It's my best ADS-B antenna yet, great reception! Furthest plane I saw was 300km away.

[@MrOndrejHruska]

@jswyman just stuck to the railing on my balcony, but its on the 5th floor

[@palawanese1067]

can i see its pic?thank you sir @@MrOndrejHruska

[@MrOndrejHruska]

@@palawanese1067 can't attach it here. small copper wire ring about 1 cm diameter, the spikes are soldered to it, larger copper wire ring on the bottom ends for sturdiness. A female BNC connector goes through the hole and is secured with a spring washer and nut

[@palawanese1067]

thanks@@MrOndrejHruska

[@VodooFeed]

My build is similar. 4 wires are enough for the ground plane. I soldered them directly to a female SMA connector. The optimal length for the 4 ground plane radials is 73.2 mm according to the m0ukd antenna calculator. The vertical antenna wire is theoretically 65.4 mm long. I trimmed it down to the exact frequency while measuring the antenna with the N1201SA AAI Vector Impedance Analyzer. This resulted in a VSWR of 1.14. The optimal angle for the radials is 42° bent down. This angle can be slightly adjusted to match the antenna to the desired 50 Ohms of impedance. Measurement in the video at 9:44 shows about 33 Ohms of impedance, which is not optimal.

[@DirtNerds]

Velocity factor should be .66 not .95 as calculator does by default

[@PIRATES3D]

Nice work 👍 Just a sugestion, you can straighten the wire before you cut it to length. Just calculate the total length before and use a drill at one end of the wire and at the other end a vise. Give it some tension and a few turns on the drill. Hope that this helps on future projects.

[@TheGhungFu]

Very late to this party but I'll add that I like Andrew McNeil's trick of cutting a plastic straw to the length of your wires. Use it as a gauge to slide over the wire and trim with your side cutters.. Measure once, cut 8 times, eh?

[@jimmymullins4997]

What kind of connector is that? Thanks, great video. Just starting with my first Pi.

[@FuzzThePiGuy]

N-Type Female Connector

[@zforce69]

Hi, What's the meter you're using?

[@FuzzThePiGuy]

N1201SA UV RF Vector Impedance ANT SWR Antenna Analyzer Meter Tester 140MHz - 2.7GHz(English Version) www.amazon.com/dp/B06VVVCKN8/ref=cm_sw_r_cp_api_i_3voUCbZ42JRKG

[@FuzzThePiGuy]

fuzzthepiguy.tech/analyzer/

[@bashkillszombies]

What's the point in putting ring terminals on when you're soldering them anyway? Why not solder them in place? Also why are you so out of breath? I started to feel like I needed to find my ventolin puffer by the end of this, it made me feel asthmatic AF! D:

[@FuzzThePiGuy]

You got to be careful soldering because of melting the plastic insert.

[@abecoulter8550]

painful to watch an American to attempt to use the metric system, when the yanks declared independence they should have used the metric system back then