Author |
Message |
Topic: Scanning Antenna Array |
Parna
Replies: 3
Views: 7345
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Forum: 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
|
Forum: 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
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Forum: 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
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Forum: 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
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Forum: 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
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Forum: 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
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Forum: 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
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Forum: 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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