Application of the 4in 4out hybrid combiner: Devices operating in the microwave band (frequency 300 ~ 300000MHz) are called the 4in 4out hybrid combiner. According to its function, the 4in 4out hybrid combiner can be divided into microwave oscillator (microwave source), power amplifier, mixer, detector, microwave antenna, microwave transmission line, etc. Through circuit design, these devices can be combined into a variety of microwave circuits with specific functions. For example, these devices can be assembled into transmitters, receivers, antenna systems, displays and other electronic equipment such as radar, electronic warfare systems and communication systems. The 4in 4out hybrid combiner can be divided into microwave electro-vacuum devices, microwave semiconductor devices, microwave integrated circuits (solid state devices) and microwave power modules according to its working principle, materials and processes. Microwave electrovacuum devices include klystron, traveling wave tube, magnetron, backwave tube, cyclotron, virtual cathode oscillator, etc., using the movement of electrons in the vacuum and the interaction with the peripheral circuit to produce oscillation, amplification, mixing and other functions. Microwave semiconductor devices, including microwave transistors and microwave diodes, have the advantages of small size, light weight, good reliability, power consumption and so on, but in the case of high frequency and high power, can not completely replace the electric vacuum devices. Microwave integrated circuit is a circuit with microwave function that is fabricated on gallium arsenide or other semiconductor material chips by semiconductor technology to form functional blocks. It has a broad application prospect in solid state phased array radar, electronic countermeasures equipment, missile electronic equipment, microwave communication system and ultra-high speed computer. Microwave power modules are made by using solid-state power synthesis technology to combine multiple solids
The device formed by the combination of solid-state microwave power devices has the advantages of high efficiency and easy to use. It is of great significance to realize the solid-state of electronic equipment such as radar, communication and electronic countermeasure. Microwave oscillator (microwave source) is an important device in microwave system and the heart of electronic equipment, which has direct influence on its performance. For example, in a high power microwave weapon system, the high power microwave oscillator determines its killing effectiveness; In radar system, microwave oscillator determines the radar range. The microwave oscillator will be further developed to the direction of high power, high efficiency, miniaturization, low power consumption and low cost.
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