Radio frequency bias device based on all-pass network

The invention discloses a radio frequency bias device based on an all-pass network. The radio frequency bias device comprises a first capacitor C1, a second capacitor C2, a third capacitor C3, a first inductor L1, a second inductor L2 and a third inductor L3, one end of the first capacitor C1 is electrically connected with one end of the third capacitor C3 and one end of the first inductor L1, the other end of the first inductor L1 is electrically connected with one end of the second inductor L2, one end of the third inductor L3 and one end of the second capacitor C2, and the other end of the second inductor L2 is electrically connected with the other end of the first capacitor C1. According to the radio frequency bias device based on the all-pass network, a second-order all-pass network structure is utilized, the radio frequency pass frequency band is wide, the bias inductor is connected to the all-pass network grounding capacitor, the impedance of an access point is low, the needed inductance is small, the