If you have 3 foot dishes on each end, you are looking at a nominal 40-42 dBi each or as much as 84 db antenna gain total. Plus 21 dB tx power. 104 gains against 132.2 loss
Seems to me like your RX signal should be roasting hot at around -28 dBm or so. From: Chuck McCown Sent: Wednesday, March 04, 2015 9:54 AM To: af@afmug.com Subject: Re: [AFMUG] Smart guys on lost question I have never had problems using simple free space path loss for these frequencies. I doubt there is significant cable or waveguide loss. Dragonwaves mount to the antenna and the gain of the antenna is at the interface. 96.6 + 20logD + 20log F Where F & D are GHz and Miles. 96.6 + 10.5 + 25.1 = 132.2 dB From: Jaime Solorza Sent: Wednesday, March 04, 2015 9:31 AM To: Animal Farm Subject: [AFMUG] Smart guys on lost question Hello Smart Dudes on the list: Running a 3.348 mile path for 18 Ghz Dragonwave link to compare what someone else came up with. I am wondering if they used just unfaded free space loss calculation and coming up with a figure 10dB better than mine, I am using unfaded urban area free space loss for mime. I use just free space loss we are within 3db of each other. I added 1 db of cable loss since I do not know if waveguide was used or many other details. I will get all that information on site. I have always engineered paths on conservative side since the start. What are your thoughts Hobson? Thx Jaime Solorza Wireless Systems Architect 915-861-1390
