Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: Best Frequency for Microwave Link  (Read 3182 times)
KI6DYR
Member

Posts: 227




Ignore
« on: March 04, 2010, 07:57:29 PM »

We have a choice of 900MHz, 2.4GHz or 4.9GHz for a wireless link to our remote location. We're currently running 2.4GHz and getting good speeds over a 4 mile path. We are feeding from snow country to a mountain peak buried in snow 33% of the year or more.

What frequency range is less affected by snow, rain, or other precipitation for broadband data?
Logged
AA4PB
Member

Posts: 12672




Ignore
« Reply #1 on: March 05, 2010, 08:25:57 AM »

The lower frequency.
Logged
KE7AAS
Member

Posts: 13




Ignore
« Reply #2 on: March 18, 2010, 02:45:10 PM »

I prefer Amana myself but you could try a Sharp or a GE.
Logged
KI6DYR
Member

Posts: 227




Ignore
« Reply #3 on: March 18, 2010, 04:52:13 PM »

I've been Googling and research somewhat confirms what I have already experienced and that is that 900MHz is not a good choice in snow country.

I have noted a marked decrease in 800MHz signals during moderate to heavy snow storms. The ski resort where our HF station was to place a HF rig (at 8,000 feet) uses 900MHz and its performance is poor. Further reading shows that 2.4GHz is ideal -- actually, between 1GHz and 3GHz. We tried 5.8GHz as well and the performance was seriously lacking.

Using 500mW to a 20dBi yagi vertically polarized on both ends yielded 20Mbps down and 900Kbps uplink over a 4 mile, snowy path at 2.4GHz. Surprisingly, horizontal polarization was not a good match, but we expected otherwise.
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!