A RF signal is transmitted in all directions from the transmitting antenna much like a water ripple travels in all directions from the point where a stone hits the surface of a pond. When that ripple hits a rock or the bank of the pond, the wave will bounce off and travel in a new direction across the pond.

The same thing happens with radio waves. They will bounce off of trees, mountains, buildings and other objects. Since straight and reflected waves take different paths some will arrive at the receiving antenna more quickly than others, causing cancellation due to differing phase relationships. This concept is called multipath. Multipath results in lowered signal levels at the receiver and thus shorter useful distances for the link. Multipath is particularly a factor in interior environments where objects provide many different reflection paths.

There are many ways to combat multipath ranging from careful frequency and antenna selection, error correction, transmission redundancy, and the use of spread spectrum and frequency hopping.

  LR Series

 

  ES Series

1. Where can I go for pricing?
   18346 Views
2. Where can I go for pricing?
   17552 Views
3. Where can I go for pricing?
   17399 Views
4. Where can I go for pricing?
   15713 Views
5. Which is the best frequency to use for my application, 315, 418, 433.92MHz, or 900MHz?
   15305 Views
6. What does the ground plane have to do with the antenna?
   13221 Views
7. Which RF modules have the longest range?
   12959 Views
8. Can I use a high gain antenna to extend the range of Linx RF modules?
   12327 Views
9. Can I use a high gain antenna to extend the range of Linx RF modules?
   11332 Views
10. Why is the type of data to be sent important when selecting a module?
    11210 Views