Microwave transmitter is one of the important components of radar, communication and electronic countermeasure systems. Its main function is to provide high-power radio frequency signals that meet the requirements, convert low-frequency AC energy into high-power radio frequency energy, and radiate it into space through the antenna feed. The transmitter is composed of several parts of circuits such as a radio frequency system, a modulator, a power supply, a system monitoring and a cooling system, and the radio frequency system includes a radio frequency amplifier and radio frequency components. RF amplifiers include solid-state amplifiers, vacuum tube amplifiers, etc.

Compared with solid-state devices, the main advantages of vacuum devices are high operating frequency, wide frequency band, high power, and high efficiency. The main disadvantage is that the volume and mass are large. Solid-state devices are also semiconductor electronic devices, which have the advantages of small size, low noise and good stability. The disadvantages are low application frequency band, low output power and low efficiency.

Vacuum tube transmitters still have a long life cycle. 20-300000 vacuum devices are used in US combat platforms, with a total of 270 systems in service until at least 2050. The 12 Institute of China Electric Power is the earliest, largest and most complete national backbone research institute for the development of microwave vacuum devices; the Space TWT Research and Development Center of the Institute of Electronics of the Chinese Academy of Sciences is responsible for the development and small batch production of broadband continuous wave tubes, pulse traveling wave tubes and ultra-small pulse traveling wave tubes for many key projects and aerospace projects in China; the 772 factory is mainly engaged in the development and production of vacuum electronic devices, microwave energy application complete machine systems and other products. The product categories of the 776 factory mainly include various microwave devices (electric vacuum, solid state) and components, vacuum contactors, vacuum interrupters, industrial microwave energy products, etc.

Solid state transmitter with solid state power devices "a thousand li a day" speed development. In recent years, with the development of solid-state microwave power tubes to high frequency and high power, especially with the development of microwave monolithic integrated circuits (MMIC) and solid-state devices, the price of microwave power tubes has been continuously reduced, and all-solid-state transmitters have increasingly replaced electronic tube transmitters in some fields. Since it is difficult for a single MMIC to achieve hundreds of watts and tens of millions of power, in order to break through this bottleneck, circuit synthesis, space power synthesis and hybrid power synthesis technologies can be used. The TR component is the core component of the active phased array, which can be regarded as the space power synthesis of multiple solid-state transmitters, and has been widely used in ground radar, airborne radar and other fields. In the field of solid-state transmitters and TR components, CLP 13 and 55 are core chip device suppliers. Enterprises with research and development and production capacity of solid-state transmitters and TR components mainly include: radar/seeker related research institutes in central military enterprises, such as 14 institutes in CLP and 206 institutes in weapons industry. Private enterprises include Tianjian Technology, Thunder and Lightning Technology, Yaguang Technology, etc. In addition, 13 and 55 institutes of CLP are also expanding to TR components.

Risk Warning: Increased competition in the microwave transmitter industry, high concentration of customers in some enterprises, and higher-than-expected decline in military prices.