At 11 GHz, 5 km is correct and paths under 5 kms can be coordinated and licensed as long as the EIRPs are restricted per the equation. At 6 GHz, the minimum distance is 17 kms. and the same equation applies for paths less than this distance.
From: Af [mailto:[email protected]] On Behalf Of Ken Hohhof Sent: Tuesday, November 08, 2016 9:05 AM To: [email protected] Subject: Re: [AFMUG] Class A and B antennas Hmmmm, can you clarify on minimum distance? I was not aware of a min distance on 11 GHz, but if it's only 5 km, maybe that was just never an issue. But I thought min distance at 6 GHz was more like 10 miles. Did I miss a change? From: Af [mailto:[email protected]] On Behalf Of Daniel White Sent: Tuesday, November 8, 2016 6:29 AM To: [email protected]<mailto:[email protected]> Subject: Re: [AFMUG] Class A and B antennas Mostly answered... but I'll take a stab: Class A vs Class B is about side-lobe suppression and F/B ratio. ETSI classes are the same way - and Class 4 antennas as Eric pointed out are a rare beast - For 11GHz, the smallest Class A antenna is the VHLP800 (2.6ft). Most 3ft antennas are actually a little bit bigger than 3ft (99cm) - For 18GHz, the smallest Class A antennas I am aware of are 2ft - Minimum distance for 11GHz and 6GHz is covered under FCC Part ยง 101.143, with the minimum distance being 5km (roughly 3.12mi). If you want to go shorter, than the max coordinated power you can use is calculated like this: EIRP = MAXEIRP-40*log(A/B) dBW EIRP = The new maximum EIRP (equivalent isotropically radiated power) in dBW. MAXEIRP = Maximum EIRP as set forth in the Table in Section 101.113(a). *This is +55dBW for 11GHz* A = Minimum path length from the Table above for the frequency band in kilometers. *This is 5km for 11GHz* B = The actual path length in kilometers. NOTE: For transmitters using Automatic Transmitter Power Control, EIRP corresponds to the maximum transmitter power available, not the coordinated transmit power or the nominal transmit power. Daniel White Managing Director - Hardware Distribution Sales ConVergence Technologies Cell: +1 (303) 746-3590 [email protected]<mailto:[email protected]> From: Af [mailto:[email protected]] On Behalf Of SmarterBroadband Sent: Monday, November 7, 2016 6:34 PM To: [email protected]<mailto:[email protected]> Subject: [AFMUG] Class A and B antennas Does anyone make a 2 foot Class A antenna for 11 GHz? Or is 3 foot the minimum. Does anyone make a 1 foot Class A antenna for 18 GHz? Or is 2 foot the minimum. Is there a minimum distance for a 11 GHz link? Thanks Adam [https://ipmcdn.avast.com/images/icons/icon-envelope-tick-round-orange-animated-tick-v1.gif]<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon> Virus-free. www.avast.com<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link>
