antenna coil

The shape of the antenna coil inductance is divided into different styles according to different products and occasions.NFC coilIt is mainly used to transmit and receive electromagnetic signals. The inductance value of the low-frequency antenna is relatively small, and the relative application products tend to be conventional. For example, credit card machines, access control systems, etc.

The NFC coil is a converter that converts the guided waves propagating on the transmission line into electromagnetic waves propagating in an unbounded medium (usually free space), or vice versa. It is used in radio equipment to transmit or receive electromagnetic waves The components of radio communication, broadcasting, television, radar, navigation, electronic countermeasures, remote sensing, radio astronomy and other engineering systems, all use electromagnetic waves to transmit information, all rely on antennas to work. In addition, in the use of electromagnetic waves to transmit energy, non- The energy radiation of the signal also requires an antenna. Generally, antennas are reversible, that is, the same antenna can be used as both a transmitting antenna and a receiving antenna. The basic characteristic parameters of the same antenna as transmitting or receiving are the same. This is the antenna the reciprocity theorem.

Antenna coil size parameters (mm)