Issue link: https://read.uberflip.com/i/1423190
LoRa Alliance ® Whitepaper Page 12 of 49 LoRaWAN ® Gateways Radio Coexistence Issues and Solutions Copyright ©2021 LoRa Alliance, Inc. All rights reserved. www.lora-alliance.org The antenna pattern shows that: • The gain above (90°) or below (270°) the antenna in the vertical plane is reduced by 20dB to 30dB. • The gain beside (90° or 270°) or behind (180°) the antenna in the horizontal plane is reduced by 20dB to 30dB. For the next calculations, we are going to consider a typical LTE antenna with the following performance at 900MHz: • Max gain: 20dBi • Horizontally 90°: 20dB loss • Horizontally 180°: 30dB loss • Vertically 90°: 25dB loss • Vertically 270°: 25dB loss 3.2.2 6DBI LoRa ANTENNA LoRa antennas are usually considered omnidirectional antennas. This is true in the horizontal plane but not in the vertical plane. When increasing the gain of the LoRa antenna, the directivity is also improved. Higher vertical isolation can be therefore obtained as shown here Figure 10: Typical gain of 6dBi omnidirectional antenna