Dumb question here. Can tall trees, in full bloom, interfere with signal reception? The reason I ask is that the reception, in the winter when the trees are not in bloom, seems much stronger than when the trees are in bloom. My house is surrounded by a lot of tall mature trees. Any help appreciated. Thank You.
Vegetation & signal reception
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nd5y
Member
Yes. Search for this on google
RF propagation path loss attenuation foliage vegetation
and start reading.
RF propagation path loss attenuation foliage vegetation
and start reading.
ScannerSK
Member
Yes, and the higher the frequency the more pronounced this effect will be. Often when it is windy, the 800-900 MHz frequencies signal strength fades in and out as the trees blow back and forth.
Shawn
Shawn
marksmith
Member
Absolutely.
And reduced signal caused by foliage can actually assist in receiving some simulcast systems because it helps mask the signal from a second site.
Conversely, it can degrade listening performance on systems that are not simulcast.
Mark
WS1095/536/436/996P2/HP1e/HP2e/996XT/325P2/396XT/PRO668/PSR800/PRO652
And reduced signal caused by foliage can actually assist in receiving some simulcast systems because it helps mask the signal from a second site.
Conversely, it can degrade listening performance on systems that are not simulcast.
Mark
WS1095/536/436/996P2/HP1e/HP2e/996XT/325P2/396XT/PRO668/PSR800/PRO652
NC1
Member
While trees can cause attenuation and signal loss, they can also provide a signal reflection where you receive transmissions that otherwise you would not hear at all.
gonefishn1
Member
yes, path loss, and pine trees are really bad because the needles hold a lot of water.
Pine needles tend to block the 700-800 MHz signals, since they are approximately the same size as the signal wavelength, or so the radio tech at work told me. a couple of decades ago. He said that's why the radios work better in the south, west, and east (plains) sides of the county where there are fewer trees and more flat land , but taller buildings in the center (thus why the transmitter was on one of the tallest buildings downtown) and not in the pine forests of the north end of the county. This was when there was only one repeater downtown, and before the integrated multiple site trunking was introduced. It may be a bit different nowadays (here), but if you are in an area that has only one repeater site the pine/fir trees may be an issue.
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