Electronic device, and radio-frequency device and signal transmission component thereof

A signal transmission component operable in an operating frequency band and applied in a radio frequency device having a signal connector and a radio frequency circuit, the signal transmission component comprising:

• a signal transmission line disposed between the signal connector and the radio frequency circuit;
• an electrostatic protection unit that is electrically connected to the signal transmission line, and that includes a connecting end electrically connected with the signal transmission line, and a grounding end;
• and
• a carrier board, the signal transmission line and the electrostatic protection unit are disposed on the carrier board;
• wherein an impedance of the electrostatic protection unit is greater than an impedance of the signal transmission line;
• wherein an electrical length is defined between the connecting end and the grounding end, and the electrical length is less than ¼ of a wavelength corresponding to a lowest operating frequency within the operating frequency band;
• and
• wherein the ¼ of the wavelength corresponding to the lowest operating frequency within the operating frequency band is related to a dielectric coefficient of the carrier board.

An electronic device using a radio frequency device, the radio frequency device operable in an operating frequency band, the radio frequency device includes a signal connector, a radio frequency circuit, a signal transmission line, an electrostatic protection unit, and a carrier board, wherein the signal transmission line is disposed between the signal connector and the radio frequency circuit, the electrostatic protection unit that is electrically connected to the signal transmission line, and the electrostatic protection unit includes a connecting end electrically connected with the signal transmission line, and a grounding end, and the signal transmission line and the electrostatic protection unit are disposed on the same surface of the carrier board;

• wherein an impedance of the electrostatic protection unit is greater than an impedance of the signal transmission line;
• wherein an electrical length is defined between the connecting end and the grounding end, and the electrical length is less than ¼ of a wavelength corresponding to a lowest operating frequency within the operating frequency band;
• and
• wherein the grounding end of the electrostatic protection unit is electrically connected to the grounded metal layer, and wherein a separating distance is between the electrostatic protection unit and the grounded metal layer.