RadioBanter

RadioBanter (https://www.radiobanter.com/)
-   Antenna (https://www.radiobanter.com/antenna/)
-   -   Beam antenna for satilite question (https://www.radiobanter.com/antenna/2494-beam-antenna-satilite-question.html)

KD4PQF October 26th 04 02:36 AM

Beam antenna for satilite question
 
Question on a beam antenna can i put a extra reflector 90 deg or on
the botom of the director so the signal will also be reflected more
upwared sence i dont have a tracking roater will this help on high
altatude passes?

Hal Rosser October 26th 04 05:34 AM


"KD4PQF" wrote in message
om...
Question on a beam antenna can i put a extra reflector 90 deg or on
the botom of the director so the signal will also be reflected more
upwared sence i dont have a tracking roater will this help on high
altatude passes?


you might want to just use a 1/4-wave vertical or a dipole
beams are good if you aim them where you want to hear
but if they're not aimed they are worse than a rubber-duck.
the gain in the forward direction is at the expense of other directions.




---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.781 / Virus Database: 527 - Release Date: 10/22/2004



Ralph Mowery October 26th 04 10:59 PM

"KD4PQF" wrote in message
om...
Question on a beam antenna can i put a extra reflector 90 deg or on
the botom of the director so the signal will also be reflected more
upwared sence i dont have a tracking roater will this help on high
altatude passes?


you might want to just use a 1/4-wave vertical or a dipole
beams are good if you aim them where you want to hear
but if they're not aimed they are worse than a rubber-duck.
the gain in the forward direction is at the expense of other directions.


YOu don't usually use 1/4 verticals for over head passes of the sats. They
have a big null overhead. Use a horizontal dipole or beter a dipole over a
reflector. Think about 3/8 wavelength is the best distance for the dipole
over the reflector but need to check that .



Hal Rosser October 27th 04 01:38 AM

you might want to just use a 1/4-wave vertical or a dipole
beams are good if you aim them where you want to hear
but if they're not aimed they are worse than a rubber-duck.
the gain in the forward direction is at the expense of other directions.


YOu don't usually use 1/4 verticals for over head passes of the sats.

They
have a big null overhead. Use a horizontal dipole or beter a dipole over

a
reflector. Think about 3/8 wavelength is the best distance for the dipole
over the reflector but need to check that .

I'll buy that - point is though - beam's a no


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.781 / Virus Database: 527 - Release Date: 10/21/2004




All times are GMT +1. The time now is 10:35 AM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
RadioBanter.com