Classification and selection of 3G antennas:

3G antenna antennas are divided into: 1. Omnidirectional antenna 2. Directional antenna 3. Mechanical antenna 4. Electrically adjustable antenna 5. Dual polarized antenna.

Directional and omnidirectional antennas:

An omnidirectional antenna, that is, 360° uniform radiation on the horizontal pattern, which is commonly referred to as non-directional, and a beam with a certain width on the vertical pattern. In general, the lobe width The smaller the gain, the greater the gain. The omnidirectional antenna is generally used in the mobile communication system and the station type of the suburban county system, and the coverage is large. Directional antennas appear as radiation in a certain angle range on the horizontal pattern, which is commonly referred to as directional, and appear as a beam with a certain width on the vertical pattern. Like omnidirectional antennas, the smaller the lobe width , the greater the gain. Directional antennas are generally used in the station type of urban cell system in mobile communication systems, with small coverage, high user density and high frequency utilization.

Orientation is divided into reflection type and orientation type. Reflection type: common ones are: Shuangling, Great Wall Flat. This type of antenna mainly works by reflecting the signal to the vibrator.

Direction type: Common ones are: 8 wooden stacked double diamonds are both, the main oscillator signal source: the front is led to the diamond, and the rear reflector. Mainly rely on reflection, so define the reflection type.

Omnidirectional antenna: common directional antenna: stacked double diamond