4G antenna is a device that conv§ ★♥erts high-frequency current or wα♠aveguide energy into el≤↓>ectromagnetic waves and emits them in regula↑←₽r directions, or restores electromagn™'etic waves from a certain direction t★™ σo high-frequency currents. Regarding×​α∞ 4G antennas, the edi§↕★γtor of Shenxun shares some basic knowl¥♦edge based on industry experience.

The basic knowledge of 4G antennas you must™£© know

4G antenna classification:

1. Classified by purpose: can b←"←e divided into communi‌♠cation antennas, TV antennas, radar antennas, €♦ etc.;

2. Classified by operating frequenβ≈★≈cy band: can be divided into shortwave antenn♠γ←as, ultrashortwave anλ'tennas, microwave antennas, etc.;¶•✘

3. Classified by directivity: &€"↑can be divided into omnidirectional anβπ&♦tennas, directional antennas, etc.;

4. Classified by shape; can be divided into l₹↑←βinear antennas, planar antennas, etc.

Omnidirectional antenna

That is, it shows uniform radiation in 360° o$♦>n the horizontal pattern, which is also called n✔₽★on-directional. On the v¥∏≥γertical pattern, it shows a bea‍★>m with a certain width. In general, the smβ←aller the lobe width, the greater ♠↕the gain. .

Directional antenna

In the horizontal pattern, the ra£≈‌diation is planned at a certain angle, w<↕©hich is also directional. On the vertical patte✘Ωrn, it is shown as a beam ‌ with a certain width. Like an omnidire•±ctional antenna, the smaller the lobe width, ®≈←the greater the gain. Big.

Gain

Gain refers to the ratio of the power d•∏"ensity of the signal generated by the act♦© ual antenna and the a₩←spiring radiating unit at the same point in ±​space under the condition of the input power b‍<↓eing flat. It quantit↕&∞atively describes the degree to which an antenπ©♠na concentrates the input power a≤γnd radiates it. The gain is significantly™γ § in close contact wit•εφh the antenna pattern↕ γ. The narrower the main lobe of the pattern and ↑☆the smaller the side lo£β✘®be, the higher the gain.