Low noise bias circuit for phased array antenna element

摘要

An antenna element includes a bias network circuitry for: during a receive mode, charging a transmit supply capacitor from a transmit power source while decoupling a receive supply capacitor from a receiver power source and coupling the receive supply capacitor to discharge and thereby provide bias to the receiver; and during a transmit mode, charging the receive supply capacitor from the receive power source while decoupling the transmit supply capacitor from the transmit power source and coupling the transmit supply capacitor to discharge and thereby provide bias the transmitter. The antenna element includes a phase shifter/attenuator section having an amplifier and a phase shifter and wherein bias voltage is provided to the amplifier and phase shifter by the transmit supply capacitor during the transmit mode and the receive supply capacitor during the receive mode.

主权项

1. An antenna element, comprising:
a transmitter; a receiver; a transmit supply capacitor; a receiver supply capacitor; a transmit power source; a receive power source; bias network circuitry for: during a receive mode, charging the transmit supply capacitor from the transmit power source while decoupling the receive supply capacitor from the receiver power source and coupling the receive supply capacitor to discharge and thereby provide bias to the receiver; during a transmit mode, charging the receive capacitor from the receive power source while decoupling the transmit supply capacitor from the transmit supply capacitor and coupling the transmit supply capacitor to discharge and thereby provide bias the transmitter; and the transmitter and the receiver are connected at a first junction; wherein the transmit supply capacitor and the receive supply capacitor are connected at a second junction; a conductor connected between the first junction and the second junction to provide a portion of a discharge path; and wherein: during the receive mode the receive supply capacitor discharge is through the conductor; and during a transmit mode the transmit supply capacitor discharge is through the conductor.