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  Topic: Scanning Antenna Array
Parna

Replies: 3
Views: 7345

PostForum: Questions Related to Antenna Theory   Posted: Wed Nov 23, 2016 10:23 pm   Subject: Scanning Antenna Array
Is it outside the -20 to +20 deg range that you see issues?

Yes there are limitations for scanning the beam. There are two issues, the grating lobe that can happen if your element spacing is large ...
  Topic: Scanning Antenna Array
Parna

Replies: 3
Views: 7345

PostForum: Questions Related to Antenna Theory   Posted: Mon Nov 21, 2016 5:50 pm   Subject: Scanning Antenna Array
The formula looks alright, but please note that in the formula theta is the angle between the beam peak and the line where your elements are placed on. If your theta is relative to braodside (normal t ...
  Topic: biquad yagi hybrid antenna [kickstarter]
Parna

Replies: 1
Views: 6370

PostForum: Questions Related to Antenna Theory   Posted: Thu Sep 01, 2016 9:27 pm   Subject: biquad yagi hybrid antenna [kickstarter]
He gives the dimensions for what he says was the first prototype for the 18dBi on his youtube channel:

https://www.youtube.com/watch?v=TanbyHBKrvU

Can you run a simulation for it? The gain does ...
  Topic: Calculating Gain from measured far field data
Parna

Replies: 1
Views: 5286

PostForum: Questions Related to Antenna Theory   Posted: Fri Aug 05, 2016 6:19 pm   Subject: Calculating Gain from measured far field data
I don't think the maximum radiated power will give you the gain of the antenna. The VNA calibration is to account for cables, connectors, etc..

To find the gain for your antenna, you need to measu ...
  Topic: FM Radio Reception by the Human Brain/Head
Parna

Replies: 10
Views: 12897

PostForum: Questions Related to Antenna Theory   Posted: Wed Jul 13, 2016 7:27 pm   Subject: FM Radio Reception by the Human Brain/Head
Thank you for clarifying. I realize there is legitimate reports of hearing ANY sound. However, the legitimate research on consistently and clearly hearing intelligible words/music does not exist any m ...
  Topic: FM Radio Reception by the Human Brain/Head
Parna

Replies: 10
Views: 12897

PostForum: Questions Related to Antenna Theory   Posted: Tue Jul 12, 2016 3:45 pm   Subject: FM Radio Reception by the Human Brain/Head
The research on the Microwave auditory effect (as in hearing actual intelligible words) seems questionable and not convincing and does not seem to come from physicists or engineers and can't be even c ...
  Topic: Calculating Power_radiated, Directivity and Gain
Parna

Replies: 1
Views: 5385

PostForum: Questions Related to Antenna Theory   Posted: Mon Jul 04, 2016 5:15 pm   Subject: Calculating Power_radiated, Directivity and Gain
How do you know you are not getting the correct answer?

If you have pattern values at every degree, you can use this for Directivity (in dBi):

https://www.wolframalpha.com/input/?i=10log10(4*180 ...
  Topic: SWR and Peak Gain
Parna

Replies: 6
Views: 11183

PostForum: Questions Related to Antenna Theory   Posted: Mon Apr 04, 2016 2:26 pm   Subject: SWR and Peak Gain
When you are measuring your antenna gain in an anechoic chamber, VSWR matters because the power that gets reflected back at the antenna terminal won't be picked up by the probe (realized gain is what ...
 
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