What are the classifications of multi antenna technology? Antennas can be divided into two categorie

Omnidirectional antennas.

The omnidirectional antenna, that is, the 360° uniform radiation in the horizontal pattern, that is, the non-directionality commonly called, is shown as a beam with a certain width in the vertical pattern, and the smaller the lobe width, the greater the gain. Omnidirectional antennas are generally used in mobile communication systems with suburban county and regional station types, with large coverage.

Directional antennas. Directional antenna, in the horizontal pattern of a certain range of radiation, that is, commonly known as directional, in the vertical pattern of a certain width of the beam, as in the omnidirectional antenna, the smaller the width of the lobe, the greater the gain. Directional antennas are generally used in the station type of urban cell system in mobile communication systems, with small coverage, large user density and high frequency utilization.

Mechanical antennas. The so-called mechanical antenna refers to a mobile antenna that uses mechanical adjustment of the downward tilt angle.

After the mechanical antenna is installed perpendicular to the ground, if the position of the bracket on the back of the antenna needs to be adjusted to change the inclination angle of the antenna due to the requirements of network optimization. During the adjustment process, although the coverage distance of the antenna main lobe changes obviously, the amplitude of the vertical and horizontal components of the antenna remains unchanged, so the antenna pattern is easy to deform.

An antenna is a transformer that transforms a conductive wave propagating on a transmission line into an electromagnetic wave propagating in an unbounded medium (usually free space), or vice versa. A component used in radio equipment to transmit or receive electromagnetic waves. Radiocommunications, radio, television, radar, navigation, electronic countermeasures, remote sensing, radio astronomy, and other engineering systems that use electromagnetic waves to transmit information all rely on antennas to work.

In addition, antennas are also required for non-signal energy radiation to transmit energy with electromagnetic waves. Generally, antennas are reversible, i.e. the same antenna can be used as both a transmitting and receiving antenna. The basic characteristic parameters of the same antenna as transmit or receive are the same.

This is the reciprocity theorem of antennas.

1. According to the nature of work, it can be divided into transmitting antenna and receiving antenna.

2. According to the use, it can be divided into communication antenna, broadcasting antenna, TV antenna, radar antenna, etc.

3. According to the directionality, it can be divided into omnidirectional antenna and directional antenna.

4. According to the working wavelength, it can be divided into ultra-long-wave antenna, long-wave antenna, medium-wave antenna, short-wave antenna, ultra-short-wave antenna, microwave antenna, etc.

5. According to the structural form and working principle, it can be divided into line antenna and surface antenna. The characteristic parameters that describe the antenna are pattern, directivity coefficient, gain, input impedance, radiation efficiency, polarization, and bandwidth.

6. According to the number of dimensions, it can be divided into two types: one-dimensional antenna and two-dimensional antenna.

Transmitting and receiving antennas.

Multi-antenna technology is a technology that improves the performance of computers and communication equipment by utilizing multiple antennas and signal processing algorithms. Its advantages include:

1.Increase system capacity: Multi-antenna technology can maximize spectrum resources, increase system capacity, increase transmission bandwidth, and reduce signal interference.

2.Improve system reliability: Multi-antenna technology can reduce problems such as signal attenuation and multipath fading, and improve system reliability and stability. Quietly.

3.Improve communication quality: Multi-antenna technology can improve communication quality and error rate performance by reducing multipath effects and suppressing interference.

4.Extend terminal battery life: Multi-antenna technology can extend terminal battery life by reducing transmit power, improving device life and longevity.

Overall, multi-antenna technology can improve the efficiency and performance of communication systems, improve user experience and reliability, and do so at no additional cost. Therefore, in modern communication applications, multi-portable antenna technology is widely used and adopted.

Improve the signal strength, Kaizen to improve the stability of the high signal. Advantages of multi-antenna system: 1. Improve signal strength, and its realization technology: beamforming. 2. Improve signal stability, and realize the technology: diversity.

(1) By type1. Car TV antenna.

2. Car radio antenna.

3. GPS vehicle antenna.

4. Automobile anti-static antenna.

5. Auto autoscopic antenna.

(2) According to the installation type1. Paste type.

2. Suction cup type.

3. Plug-in type.

4. a thread. 5. Suction the roof.

6. Paste glass.

7. Clamp edge type.

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