Question: What is the MMDS system?

Answer: MMDS (Microwave Multipoint Distribution Systems), as its name implies, is a microwave multi-channel distribution system. It is a new type of transmission system developed in recent years to transmit cable TV signals through wireless microwave. The system is light in weight, small in volume, small in area and easy to install and debug. It is very suitable for small and medium-sized cities or suburbs. The area that cable TV can't cover.

Question: What types of flanges are commonly used?

Answer:Common flange models include FAP, FAM, FAE, FBP, FBM, FBE, FDP, FDM, LFDP, FUGP (American Standard), etc. Among them, P-flange M-flange E-flange E-flange E-flange E-flange E-flange E-flange E-flange E-flange E-flange E-flange E-flange E-flange E-flange E-flange E-flange E-flange.

Q: What are the characteristics of microwave?

Answer:1. Skin effect - Microwave propagates near the outer surface of conductor. 2. Wave-particle duality - Microwave has the properties of superposition, interference, refraction, scattering and reflection in the process of propagation.

Question: What is the principle of household microwave oven and what characteristics of microwave are used?

Answer:There are four international stipulated frequencies for microwave heating and drying: L-band, frequency 890-940 MHz, central wavelength 0.330 m; S-band, frequency 2400-2500 MHz, central wavelength 0.122 m; C-band, frequency 5725-5875 MHz, central wavelength 0.052 m; K-band, frequency 2200-22250MHz, central wave. The length is 0.008m. Only L and S segments are used in household microwave ovens. The magnetron is used in the household microwave oven. The electric energy is converted into microwave energy by the magnetron. There are two kinds of magnetron: pulse magnetron and continuous magnetron. Continuous wave magnetron is used in microwave oven. Microwave propagation speed is close to the speed of light. It can reflect and refract in the process of propagation. It has three important characteristics related to heating. When microwave meets metal objects, such as silver, copper and aluminium, it will be reflected like a mirror reflecting visible light. Therefore, metals are commonly used to isolate microwave. Microwave ovens are usually made of metal boxes and waveguides, and furnace doors and observation windows are made of metal mesh and tempered glass. Microwave encounters insulating materials such as glass, plastics, ceramics, mica and so on, which can pass through as smoothly as light through glass. Therefore, common insulating materials are used to make discs without affecting the heating effect. Microwave, when it comes to foods containing water or fat, can be absorbed in large quantities and converted into heat energy. Microwave ovens use this characteristic to heat food.

Q: What is the difference between microwave and electromagnetic wave?

Answer:Microwave is a member of the electromagnetic wave family. Arranged by wavelength, the queue is as follows:
... Long Wave, Medium Wave, Short Wave, Microwave, Infrared Ray, Visible Ray, Ultraviolet Ray, Alpha Ray...