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An antenna is a transformer that transforms guided waves propagating on a transmission line into electromagnetic waves propagating in an unbounded medium (usually free space), or vice versa. A component used in radio equipment to transmit or receive electromagnetic waves. Engineering systems such as radio communication, broadcasting, television, radar, navigation, electronic countermeasures, remote sensing, and radio astronomy rely on antennas to transmit information using electromagnetic waves.
An antenna is a transformer that transforms guided waves propagating on a transmission line into electromagnetic waves propagating in an unbounded medium (usually free space), or vice versa. A component used in radio equipment to transmit or receive electromagnetic waves. Engineering systems such as radio communication, broadcasting, television, radar, navigation, electronic countermeasures, remote sensing, and radio astronomy rely on antennas to transmit information using electromagnetic waves.
The basic principle of an antenna is that high-frequency current generates changing electric and magnetic fields around it. According to Maxwell's electromagnetic field theory, "changing electric fields generate magnetic fields, and changing magnetic fields generate electric fields". By continuously exciting them, wireless signal propagation is achieved.
Different requirements correspond to the use of different communication frequency bands and communication systems. Therefore, it is necessary to use antennas of different categories. Common antennas for wireless communication include Monopole antenna, Double Antenna, Loop antenna, Yagi-Uda Antenna, horn antenna, Microstrip Patch Antenna, Corner reflector antenna, Dish antenna, Slot antenna, LoRa antenna, Fiberglass antenna.
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