A negative group delay circuit based on RLC and a low noise amplifier and a design method thereof

Abstract

The invention relates to a negative group delay circuit based on RLC and low noise amplifier and a design method thereof, the circuit includes a signal source, the signal source is connected with a network input port, the network input port is connected with the network output port, the network output port is externally connected with a load, the impedance of the signal source and the load impedance are both R0, two groups of resonant circuits based on RLC are arranged between the network input port and the network output port, and a low noise amplifier is connected between the two groups of resonant circuits based on RLC. The group delay of the circuit can be set according to one's own needs, and the loss parameters can be inserted into the circuit to calculate the required circuit parameters, such as the values of resistance R, inductance L and capacitance C in the circuit. And the insertion loss of the circuit can be zero, which can compensate the loss caused by RLC negative group delay circuit by LNA to some extent, and improve the NGD bandwidth.

Description

technical field [0001] The invention relates to the technical field of microwave engineering, in particular to a negative group delay circuit based on RLC and a low noise amplifier and a design method thereof. Background technique [0002] In the early 20th century, after American scientists A.Sommerfeld and L.Brillouin proposed the possibility of negative group delay, "negative group delay" was controversial for a long time, until Chu and Wong of Bell Labs Negative group velocity is observed for the first time in experiments where laser pulses pass through a GaP:N sample. Since then, in other optical and quantum experiments, it has been confirmed many times that the group velocity is negative or greater than the speed of light. After entering the 20th century, with the development of new materials such as left-handed materials and the higher and higher requirements for the performance of communication systems, more researchers began to study group delay. Especially in rec...

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Problems solved by technology

However, the current research results of negative group delay circuits are mainly concentrated in western developed countries, especially the United States and Japan, and this field is still in its infancy in China.

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