Review the antenna technology in the terminal The mobile phone is full of antennas, from GPS, Bluetooth, wifi, 2G, 3G, 4G and other frequency bands. The lower the frequency, the larger the size. Millimeter wave, as the name suggests, its wavelength scale is within 10mm. Calculated according to a quarter of the wavelength, a lattice of about 2.5mm is composed of an array with regular spacing...

With the development of data communication and multimedia business requirements, 4G mobile communication has begun to rise, and 4G has also highlighted its increasingly important position because of its ultra-high data transmission speed. Over the past two decades, we have witnessed the transition of mobile communications from 1G to 4G LTE. During this period, the key skills of communication...

2G/3G/4G base stations can be the same, but the equipment in the equipment room is different. The main difference is that the frequency of the antenna is different. Due to the different implementations of 3G/4G by various operators, some antennas are the same as 2G, while others are wider and larger than 2G. However, there are currently 2G/3G/4G shared antennas. From the appearance...

3G Antenna Antenna Selection: Antenna selection principle: According to the design of the distributed system, the installability of the antenna is examined to decide which type of antenna to use, and the leaky cable does not need an antenna. Antenna units commonly used in indoor distributed systems are: (1) indoor ceiling antenna units (2) indoor wall-mounted antenna units...

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: omnidirectional antennas, that is, 360° uniform radiation in the horizontal pattern, which is commonly referred to as non-directional, in the vertical pattern...

After entering 2004, 3G entered the stage of rapid development. In the rapid development of 3G, it should also be aware of the existing limitations. 3G network requires good quality of service (QoS), backward compatibility and its compatibility with fixed network, and high-speed multimedia service capabilities, etc., and the existing 3G network still has a gap with this goal; 3G terminals are used in multimedia services. support...