Bipolar ESC Attenuator

Abstract

The invention provides a bipolar electronically adjustable attenuator, which includes a radio frequency circuit and a control circuit; the radio frequency circuit includes a first LC compensation circuit, a first balun circuit, a first impedance conversion circuit, and a PIN diode array circuit that are electrically connected in sequence , a second impedance transformation circuit, a second balun circuit and a second LC compensation circuit; the control circuit includes a voltage conditioning circuit, a voltage reconditioning circuit, a first voltage-to-current conversion circuit and a first piecewise linear fitting that are electrically connected in sequence circuit, wherein the output end of the voltage conditioning circuit is electrically connected to the second voltage-to-current conversion circuit and the second segmental linear fitting circuit; the PIN diode array circuit is connected to the first voltage-to-current conversion circuit and the second voltage-to-current conversion circuit respectively Electrical connection; the PIN diode array circuit adopts the structure of four rows of PIN diode arrays; the invention has the characteristics of wide application frequency, small insertion loss, small nonlinear distortion, large dynamic range, and control characteristics approaching linearity.

Description

technical field [0001] The invention relates to the technical field of signal processing and electromagnetic compatibility, in particular to a bipolar electronically adjustable attenuator. Background technique [0002] Adaptive radiated interference cancellation technology is an effective method to solve the co-platform interference of transceiver antennas in communication systems such as ships. The basic principle is to extract a reference signal from the transmitting antenna of the communication transmitting system as the interference source, and input it between the receiving antenna and the receiver of the interfered communication receiving system after processing, and do the same with the interference signal directly received by the receiving antenna Amplitude anti-phase cancellation, so that the interference signal coupled by space radiation can be avoided from entering the receiver, and the interference of the receiver can be eliminated, so that the transceiver system...

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