PilotAware

British Forum => Technical Support => Topic started by: Bulleteer on July 07, 2017, 10:21:04 am

Title: Tuned Low Profie Antenna
Post by: Bulleteer on July 07, 2017, 10:21:04 am

Should the tuned low profile antenna be located horizontally or vertically?

Title: Re: Tuned Low Profie Antenna
Post by: Admin on July 07, 2017, 10:39:50 am

All antenna should be positioned vertical

Thx
Lee

Title: Re: Tuned Low Profie Antenna
Post by: Bulleteer on July 07, 2017, 06:14:26 pm

I have seen these mounted horizontally on the top of the aircraft dash panel, so just to confirm, you reckon they should be vertically installed as per second pic, not first?

Title: Re: Tuned Low Profie Antenna
Post by: brinzlee on July 07, 2017, 06:16:03 pm

That's the correct orientation vertical as in second photo

Title: Re: Tuned Low Profie Antenna
Post by: exfirepro on July 08, 2017, 12:27:21 am

Bulleteer,

Basic principle is that if your antenna(s) and the other guy's are 90 degrees out of alignment, you will lose 3dB of signal strength. 3dB is HALF of your signal, so definitely NOT recommended. The convention is for aircraft antennae to be vertically polarised as this produces a circular radiation pattern all round the plane (except if/where the antenna is screened by metal bodywork / bags of water (us) / etc.), so best to stay - as far as possible - the same as everyone else.

Regards

Peter

Title: Re: Tuned Low Profie Antenna
Post by: Bulleteer on July 08, 2017, 08:35:41 pm

Thanks Peter, much appreciated.
Mark