Cambridge Broadband Networks: 10Gbps multipoint microwave backhaul platform launched

ocleroux said:
Hell, we can make our towers look like trees...sure we can just pop a cute umbrella on there!
Click to expand...

I don't mean them getting wet but signal propagation through rain. They are affected by affected by rain, vapor, dust, snow, cloud, mist and fog, heavy moisture, depending on chosen frequency. http://en.wikipedia.org/wiki/Rain_fade

Makes me think about my mates vodacom connection in the midlands, as soon as the mist rolls in you can kiss your cellphone signal goodbye :D
 
ponder said:
I don't mean them getting wet but signal propagation through rain. They are affected by affected by rain, vapor, dust, snow, cloud, mist and fog, heavy moisture, depending on chosen frequency. http://en.wikipedia.org/wiki/Rain_fade

Makes me think about my mates vodacom connection in the midlands, as soon as the mist rolls in you can kiss your cellphone signal goodbye :D
Click to expand...

Urg...I swear...mother nature is such a sexually frustrated cow! bleh.
 
When properly planned to take into consideration the effects of rain fade, a VectaStar network, indeed any microwave backhaul network, will achieve in excess of 99.999% reliability (315 seconds of downtime per year). The issues that people experience with their cellphones during rain can be due to the rain fade between their handset and the mobile phone mast itself - especially if their signal is low or if they are operating at some of the higher frequency bands.

The VectaStar microwave backhaul system cited in this release operates in the 10.5, 26 and 28 GHz bands at no more than 20 dBm (100mW Effective Radiated Power the maximum allowed by ETSI). This is much lower than your typical cellphone! They can do what they do with such low power because they use very directional high-gain antennas. There is no evidence to suggest any adverse reactions to these frequencies at these power levels in humans.

These frequencies are much too high to be useful for cooking food, normally that’s done at 2.45 GHz (similar to WiFi) or slightly lower at 915 MHz (similar to mobile phone GSM). I suppose you could cook food if you could build a 26GHz 800W microwave, but that would be very expensive!

Cheers!
 
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