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https://www.satsig.net/cgi-bin/yabb/YaBB.pl Anything else >> General and other topics >> Antenna radiation patterns https://www.satsig.net/cgi-bin/yabb/YaBB.pl?num=1392726521 Message started by cornel on Feb 18^th, 2014 at 12:28pm

Title: Antenna radiation patterns
Post by cornel on Feb 18^th, 2014 at 12:28pm

I would like to know where I can get hold of antenna radiation patterns? For instance a 7,3m Andrew or 9,3m Andrew.
We are moving some dishes close to an office park and health and safety is quite a concern.

Thanks

Title: Re: Antenna radiation patterns
Post by USN - Retired on Feb 18^th, 2014 at 6:36pm

Radiation patterns are frequency- and weighting-dependent, so more information is needed. Not sure, but I think General Dynamics absorbed Andrews medium and large terminal capability. Here's a data sheet (https://www.gdsatcom.com/Antennas/Data_Sheets/655-0060B_7.3m.pdf) on the 7.3m GD. The spec you're interested in is "beamwidth". But it's not an answer. It's merely a starting point for your calculations.

That said, contacting GD directly might produce a more comprehensive answer.

//greg//

Title: Re: Antenna radiation patterns
Post by Admin1 on Feb 19^th, 2014 at 11:14am

I agree with Greg. Contact GD Satcom for advice. Ask about near field radiation levels and in the vicinity of the beam if it passes over nearby properties or obstructions.

I would recommend also getting a RAHAM Radiation Hazard Meter (or similar) so you can walk around in the vicinity of the antenna and demonstrate the RF levels. Use it also to verify that you have no leakage from waveguide flanges etc.

Title: Re: Antenna radiation patterns
Post by cornel on Feb 19^th, 2014 at 11:44am

Thanks I will contact them!