A dual-band negative group delay circuit and its parameter determination method

Abstract

The present invention provides a dual-band negative group delay circuit and its parameter determination method. The negative group delay circuit includes: six microstrip transmission lines and two transistor transconductances, and the six microstrip transmission lines are respectively microstrip Transmission line TL1, microstrip transmission line TL2, microstrip transmission line TL3, microstrip transmission line TL4, microstrip transmission line TL5, microstrip transmission line TL6, and the two transistor transconductances are respectively transistor transconductance Gm1 and transistor transconductance Gm2; The two operating angular frequencies of the frequency band negative group delay circuit adopt the method of solving parameter equations to determine the characteristic impedance and transmission phase of the six microstrip transmission lines, so that the transmission of signals at the two operating angular frequencies can be realized without the need for two The cascading of a single-band frequency-band negative group delay circuit realizes the transmission of any two operating angular frequency signals, and the two operating angular frequencies are irrelevant. Negative group delay on any two specified frequencies is achieved.

Description

technical field [0001] The invention relates to the technical field of negative group delay circuits, in particular to a dual-band negative group delay circuit and a parameter determination method thereof. Background technique [0002] Negative group delay circuits have become one of the research hotspots in recent years. Unlike conventional microwave components, the transmission phase of a negative group delay circuit is proportional to the frequency within the operating bandwidth. This feature allows it to be cascaded with conventional components to obtain a flat group delay response, eliminating the effects of dispersion. In addition, related studies have found that by properly adjusting the gain, phase and group delay of a negative group delay circuit, it can be equivalent to a non-Foster element or network. If the phase, gain and group delay of the equivalent non-Foster circuit are adjustable, then the component values ​​are also adjustable. Furthermore, the negative...

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Problems solved by technology

However, this design approach results in excessive circuit area

Also, since the circuit often suffers from large transmission losses at the NGD frequency, this design approach will further increase the loss

In the literature T.Shao, S.Fang, Z.Wang, H.Liu and S.Fu, "A Novel Dual-Band Negative Group Delay MicrowaveCircuit," 2019 IEEE Radio and Wireless Symposium, Orlando, FL, USA, 2019, pp In .1-3, the circuit realizes the dual-band NGD characteristic, but the two operating angular frequencies are numerically related

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