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Log in| Search found 6 matches |
| Author | Message |
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 Topic: Probability of false alarm and IF bandwidth |
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| k3nnw Replies: 2 Views: 6400 |
 Forum: Questions Related to Antenna Theory Posted: Mon Mar 23, 2020 1:10 pm Subject: Probability of false alarm and IF bandwidth |
| I think this paper is a good explanation:
https://www.phys.hawaii.edu/~anita/new/papers/militaryHandbook/rcvr_sen.pdf It boils down to noise figure (NF) and the previous response, the intuitive ... |
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| Topic: capacitively fed antennas |
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| k3nnw Replies: 1 Views: 5308 |
Forum: Questions Related to Antenna Theory Posted: Mon Mar 23, 2020 12:35 pm Subject: capacitively fed antennas |
| The C is used to tune out the L of the feed. In some cases the length of the feed (e.g. from the centre pin of an SMA connector, via a length of stiff wire to the centre of an air-spaced patch) means ... | |
| Topic: antenna to antenna isolation and polarization |
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| k3nnw Replies: 1 Views: 5188 |
Forum: Questions Related to Antenna Theory Posted: Mon Mar 23, 2020 12:15 pm Subject: antenna to antenna isolation and polarization |
| This is long-winded and I am not sure it helps as much as I had intended. Some of this is based on conversations with Ed Joy, Professor emeritus at Georgia Tech, when I wanted to understand more abou ... | |
| Topic: Slot Impedance |
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| k3nnw Replies: 1 Views: 5038 |
Forum: Questions Related to Antenna Theory Posted: Mon Mar 23, 2020 11:35 am Subject: Slot Impedance |
| My simple understanding is to consider that the driving point impedance at one of the ends of the slot is likely to be very low (lots of current driving into a low impedance "shortish circuit&quo ... | |
| Topic: [Question] Design Project |
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| k3nnw Replies: 1 Views: 4294 |
Forum: Questions Related to Antenna Theory Posted: Mon Mar 23, 2020 11:17 am Subject: [Question] Design Project |
| How about
(1) a patch array with an intentional squint i.e.. boresight is not perpendicular to the plane of the array but looks to the left or right in azimuth, or up /dow in elevaation, by e.g. 30 ... |
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| Topic: Can i run a long wire through eye hooks on my fence? |
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| k3nnw Replies: 2 Views: 5162 |
Forum: Questions Related to Antenna Theory Posted: Mon Mar 23, 2020 11:04 am Subject: Can i run a long wire through eye hooks on my fence? |
| I agree with the previous response: no, the insulator won't matter.
Assuming your antenna is used at frequencies below (e.g.) 50MHz, we can show that the change in performance of the antenna is a ... |
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