-
The difference between omnidirectional antenna and directional antenna
The difference between omnidirectional antennas and directional antennas is that antennas have different radiation or reception abilities in different directions of space, which is the directionality of antennas. According to the different directionality, there are two types of antennas: omnidirectional and directional.
-
The principle of radio transmitters
-
The ancestor of radio transmitters - spark transmitters
-
Mechanical antennas will bring revolutionary changes to individual military communication
Low power consumption: Due to the longer wavelength, the power required for ULF and VLF signal transmission is lower, which means that the energy consumption of communication equipment is relatively low, which is beneficial for extending battery life and saving energy.
In military terms, ULF and VLF communication are widely used for underwater submarine communication, deep-sea exploration, and intelligence gathering. These frequency bands can achieve reliable communication
