Radio frequency port electrostatic protection circuit and method

[0026] see figure 1 , this embodiment shows a radio frequency port static protection circuit, which can guide the static electricity input from the radio frequency port into the ground without affecting the radio frequency performance of the radio frequency port, so as to protect the radio frequency port from static electricity.

[0027] The radio frequency port electrostatic protection circuit of this embodiment includes: a radio frequency port 11, an electrostatic protection circuit 12 and a radio frequency circuit module 13;

[0028] The electrostatic protection circuit 12 includes a low-frequency derivation circuit 121 and a low-frequency filtering component 122, and the low-frequency filtering component 122 is connected between the radio frequency port 11 and the radio frequency circuit module 13, and is used for performing low frequency filtering on signals transmitted to the radio frequency circuit module 13, and the low frequency One end of the deriving circuit 121 is ...

[0042] see Figure 4 , this embodiment shows a radio frequency port electrostatic protection method, including:

[0043] S401. The radio frequency port receives the input radio frequency signal, and transmits it to the back-end circuit through the connection line;

[0044] S402. The low frequency filter component connected to the radio frequency port and the radio frequency circuit module filters the low frequency signal in the radio frequency signal;

[0045] S403. A low-frequency derivation circuit with one end connected to the radio frequency port and the other end grounded leads the low-frequency signal into the ground plane, wherein the low-frequency derivation circuit is equivalent to an open circuit for high-frequency signals and a short-circuit circuit for low-frequency signals.

[0046] In this embodiment, the low-frequency derivation circuit may include components that are open to high-frequency signals and short-circuit to low-frequency signals. Preferably, the lo...