Home |
Search |
Today's Posts |
#4
![]() |
|||
|
|||
![]()
From my experience of years ago, must say: most
likely makes makes little , or no difference! Reason, is 1) depends WHERE you are , relative to the satelite , and 2) the polarity of the satelite , relative to your location , and most likely NOT in the plane of your antenna, at any given time. The antenna on a satelite is more or less locked towards earth, with a magnet, so far-so good, but at WHAT polarity? This is the reason MOST great stations use Circular Polarization. Max loss is 3 dB, for polarity consideration, tho there would be a loss, from the ANGLE of the pattern , from the satelite (if I understand this correctly) With linear polarization, there will be times of deep fades, and also periods of great signal strength. This dates me, and from A-06 and A-07 used 1/4 whips, bent against a metal ground plane, about 30 degs, tip of antenna faceing NORTH and worked considerable stuff. For the Eleptical orbit sats, you may need gain , and circular polarization to be heard, tho better stations can be contacted (the "Umph" is on their end)! In sum total, then if you use linear polarization you must accept the fadeing, tho you can make many contacts, and hear I.S.S. qso's but not as a solid signal. Hope this helps. Jim NN7K Jim Leder wrote: This is a question I posted a little while back on rec.radio.amateur.satellite, but never received any response, maybe because there is not a good answer. But here it is again: I like to try to make occasional satellite contacts, usually on VO-52, and have a place for only one antenna. In the past I have used a dual band Diamond X-50 vertical, but now I am wondering if something like KU4AB's dual band E-factor horizontal loop might be a better choice. Any opinions? Thanks. |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
Vertical radiation from horizontal dipole? | Antenna | |||
Vertical vs Horizontal shootout part one | Antenna | |||
Sigma 5 vertical as a horizontal antenna??? | Shortwave | |||
horizontal and vertical antenna on one mast | Antenna | |||
efficiency of horizontal vs vertical antennas | Antenna |