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Externet

Replies: 1
Views: 7840

Forum: Questions Related to Antenna Theory   Posted: Sat Feb 20, 2016 1:01 am   Subject: Satellite Dish Signal Power
~ 12 femtowatt.
Externet

Replies: 3
Views: 9575

Forum: Questions Related to Antenna Theory   Posted: Mon Feb 02, 2015 3:18 am   Subject: Radiation resistance...
Thanks, helix.

Is the formula
Rr = 1580 * ( He / wavelength)^2
valid ?

He = effective height, expressed in fractions of a wavelength, of the distributed common-mod ...
Topic: Multi-turn loops ...
Externet

Replies: 1
Views: 6787

Forum: Questions Related to Antenna Theory   Posted: Sun Jan 18, 2015 7:36 pm   Subject: Multi-turn loops ...
What characteristics change when a loop antenna is made of a few turns -say 4- compared to a single turn loop of the same diameter ?
Topic: Huge loop antenna...
Externet

Replies: 0
Views: 8331

Forum: Questions Related to Antenna Theory   Posted: Sun Jan 18, 2015 7:04 pm   Subject: Huge loop antenna...
Can a 1 metre or larger diameter receiving single loop antenna be made to behave reasonably well for weak signals on UHF ?
Externet

Replies: 3
Views: 9575

Forum: Questions Related to Antenna Theory   Posted: Sun Jan 18, 2015 6:47 pm   Subject: Radiation resistance...
What is radiation resistance of an antenna and how is it calculated ?
Externet

Replies: 0
Views: 7970

Forum: Questions Related to Antenna Theory   Posted: Thu Jan 15, 2015 3:05 am   Subject: Does anyone know the impedance of a television tuner ?
Is there any impedance chart/plot of any ATSC modern television tuner antenna input that you may let me know/refer/link to ?
Or any ATSC tuner module schematic diagram, please ?
Externet

Replies: 8
Views: 15097

Forum: Questions Related to Antenna Theory   Posted: Thu Jan 15, 2015 2:36 am   Subject: free space impedence matching?
77 ohm is a very favored mathematical impedance calculation result for minimal losses in coaxial cables.
75 is a compromise to match a 73 ohm dipole with a 77 ohm low loss coaxial..

30 ohm is a v ...
Externet

Replies: 1
Views: 7316

Forum: Questions Related to Antenna Theory   Posted: Thu Jan 15, 2015 2:25 am   Subject: What type of antenna is this?
Agree it is a loop antenna.
Perhaps folded to fit a housing, and giving it a omnidirectional pattern.

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