4G antenna is a devic用如e that converts high-frequ信見ency current or wavegu我請ide energy into elec東就tromagnetic waves and emits them 窗謝in regular directions, or re唱得stores electromagnetic 雨也waves from a certain direction t電懂o high-frequency currents.空地 Regarding 4G antennas, the到內 editor of Shenxun shares 我月some basic knowledge based on山現 industry experience.

The basic knowledge of 4G 地數antennas you must know

4G antenna classification:

1. Classified by purpose: can be di湖錯vided into communication議的 antennas, TV antennas, rada煙暗r antennas, etc.;

2. Classified by ope雨地rating frequency band: can be我路 divided into shortwave antennas, ultra麗歌shortwave antennas, microwave ante事廠nnas, etc.;

3. Classified by directivity: ca綠新n be divided into omnidirectio筆物nal antennas, directional antenn坐動as, etc.;

4. Classified by shape; can be divi飛也ded into linear antennas, planar anten員腦nas, etc.

Omnidirectional antenna

That is, it shows uniform radiatio呢月n in 360° on the horizon爸樂tal pattern, which is also called non-筆姐directional. On the vertic司綠al pattern, it shows a beam with 中多a certain width. In 討間general, the smaller the lobe width, t書農he greater the gain. .

Directional antenna

In the horizontal patter新器n, the radiation is pl匠雨anned at a certain angle, which 大月is also directional. On the vertica工可l pattern, it is shown as a b可山eam with a certain width. Like 老科an omnidirectional antenna, the smaller離術 the lobe width, the greater the 他兵gain. Big.

Gain

Gain refers to the rat靜去io of the power density of the匠那 signal generated by the actual ante議低nna and the aspiring林農 radiating unit at the sa低志me point in space under the物光 condition of the input power being fl去事at. It quantitatively descri大影bes the degree to which an 很年antenna concentrates the i作門nput power and radiates it. The gain 能人is significantly in close contact北筆 with the antenna pattern. Th林銀e narrower the main lobe 服是of the pattern and the smaller the市做 side lobe, the higher市音 the gain.