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What are the main functions of the WIFI antenna
Jun 16, 2017

The most important function of the WIFI antenna is to transform the energy emitted by the transmitter (usually the air medium) radiated by the electromagnetic wave and the energy delivered or received by the transceiver. In the energy conversion process, there will be a transceiver and WIFI antenna and WIFI antenna and communication between the discontinuous interface. In a wireless communication system, it is necessary for the WIFI antenna to be properly planned according to the characteristics of the two interfaces so that a continuous energy transfer path is formed between the transceiver, the WIFI antenna and the transmission medium, so that the transmission The energy of the machine is radiated to the transmission medium by transmitting the WIFI antenna, and the energy of the radiated electromagnetic wave is transmitted to the receiver side by receiving the WIFI antenna. In order to explain the two parameters, the following are the definitions of these parameters: WIFI antenna input impedance (Input Impedance)

The input impedance of the WIFI antenna is the impedance value seen at the interface end of the transceiver antenna. So that the WIFI antenna and transceiver circuit between the impedance matching (Impedance Matching) to reduce the mismatch phenomenon caused by the reflection loss (Return Loss), so the WIFI antenna input impedance and the transceiver circuit need to match the output impedance of each other, so a It will not make most of the energy in the WIFI antenna and the transceiver between the loss. In the usual WIFI antenna plan, the input impedance is usually impossible to make changes to the plan. The most common approach is to plan the input impedance of the WIFI antenna in the usual circuit of 50 ohms, so that it can match the output impedance of the transceiver circuit to 50 ohm. But in the exception of the transceiver circuit plan, the output impedance is not necessarily 50 ohm, this time in the transceiver circuit and the WIFI antenna input between the planning of an additional impedance matching network to WIFI antenna input impedance Transform the output impedance to the transceiver.