* Question
| What points should I pay attention to when using the antenna in the room system? |
* Answer
| (1) Try to use a broadband antenna In the process of selecting a room subsystem antenna, the frequency band of the antenna should include the working frequency bands of the wireless system such as GSM, CDMA, WCD-MA, TD-SCDMA, WLAN, and LTE.That is to say, all mobile communication bands of 800 to 2500 MHz are included.
(2) Regardless of diversity and beamforming Because the indoor environment is small and the penetration loss is large, the use of diversity technology is like using a high-altitude gun to kill mosquitoes, which does not significantly improve the system performance, but increases the system cost.Therefore, the use of diversity and beamforming techniques in indoors is not effective and has little significance.Although TD-SCDMA supports smart antenna beamforming, in the indoor environment, there is no beamforming function.The town avoids a large attenuation of energy and ensures that wireless signals are effectively transmitted in complex indoor environments.Therefore, in an indoor environment, the antennas are generally vertically polarized.The Yagi antenna is suitable for use in a system with only one system; if multiple systems are combined, a wideband high gain directional antenna, such as a broadband logarithmic period antenna, is required. |
COMMENTS