On September 22, Beijing time, Comcast, the largest radio and television cable network operator in the United States, announced that it will build its own 5G wireless network, which will adopt two major frequency bands, one is the CBRS frequency band, and the other is the 600MHz frequency band.This makes Comcast the first broadcast and cable TV network operator in the world to build a 5G wireless ……

In the last article, we introduced that the development of microwave communication systems has also undergone analog-to-digital conversion like other radio communication systems.Each transceiver of the analog microwave system can work in 60-channel, 960-channel, 1800-channel or 2700-channel communication, and can be used for microwave circuits of different capacity levels. But due to technological……

Microwave is a transmission method of communication. For digital microwave communication technology, microwave is used as a way to complete the transmission of digital information. At the same time, through the use of radio space, it is possible to transmit all kinds of irrelevant information. Up to now, digital microwave communication technology has become a widely used technology. The technology……

TDD is a duplex method of communication systems that is used in mobile communication systems to separate receiving and transmitting channels.China submitted the draft third-generation mobile communication standard (TD-SCDMA) in June 1997, and its TDD model and new technology of smart antennas were highly evaluated and became one of the three main candidate standards. Considering that TD-SCDMA has ……

In the last article, we introduced the SMA connector. Usually, when selecting RF connectors, the main factors are its frequency range, impedance, withstand voltage, VSWR, size, etc. Therefore, different connectors have different properties and are suitable for different scenarios.There are several common types of RF coaxial connectors: N, SMA, L29, BNC, 2.92mm, 2.4mm, 3.5mm, 1.85mm, 1.0mm etc.N Ty……

There are 12 available frequency bands for TD-LTE in the world, which are 1900 ~ 1920MHz, 2010～2025 MHz, 1850～1910MHz, 1930～1990MHz, 1910～1930MHz, 2570～2620MHz, 1880～1920MHz, 2300～2400MHz, 2496～2690MHz, 3400～3600MHz, 3600～3800MHz, 703～803MHz.China has divided into 4 frequency bands for TDD, which are: 2010～2025MHz, 1880～1920MHz, 2300～2400MHz, 2496～2690MHz.Among them, Spectrum in the 2496-2690 MHz ……