Surge protection circuit for lightning protection of RF port

• Main Authors: WANG XINGLE, HE YING'ER, WANG XING'AN, WANG SHUN'AN, WANG SHENBIAO
• Format: Patent
• Language: Chinese; English
• Published: 23.11.2021
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The utility model relates to the field of power electronics, in particular to a surge protection circuit for lightning protection of an RF (Radio Frequency) port, which is used for a high-speed signal RF port and comprises a primary protection circuit, a secondary protection circuit and a T-type filter circuit which are connected in parallel, the T-type filter circuit comprises a capacitor C2, an inductor L1 and a capacitor C3, the capacitor C2 and the capacitor C3 are connected in series, one end of the inductor L1 is connected between the capacitor C2 and the capacitor C3, and the other end of the inductor L1 is grounded. According to the utility model, the T-type filter circuit is adopted in the three-stage protection circuit, namely, the mode that the capacitors are connected in series, then the grounding inductor is connected in parallel and then the capacitors are connected in series is adopted, and the nH-level grounding high-frequency inductor shows a high-resistance state for high-frequency signals o