Series dual-port negative impedance converter for signal enveloping distortion compensation
A technology of negative impedance converter and distortion compensation, applied in the direction of impedance network, impedance matching network, network using active components, etc., can solve the problem of limited negative impedance converter circuit structure, negative impedance converter compensation circuit stay, structure Complicated problems, to achieve the effect of simple structure, small size and broad application prospects
Active Publication Date: 2017-12-12
ZHEJIANG UNIV
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Problems solved by technology
However, limited by the circuit structure of the negative impedance converter, the negative impedance converters in these works are connected in parallel to the circuit, and then the impedance in the circuit is compensated
However, due to the complex structure of the floating differential structure negative impedance transformer, its application in the fields of antennas and artificial materials is limited.
The above reasons make the compensation circuit of the negative impedance converter always stay in the compensation of the reflection coefficient
Method used
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[0030] The present invention will be further described below in conjunction with drawings and embodiments.
[0031] Embodiments of the present invention and its implementation work process are as follows:
[0032] According to the theoretical knowledge of microwave engineering, the S-parameter matrix and the transmission coefficient matrix ABCD of the dual-port network can be converted to each other. The specific calculation formula is as follows:
[0033]
[0034]
[0035]
[0036]
[0037] Among them, A means to apply a voltage V on port 1 (ie input port) 1 and measuring the open circuit voltage V on port 2 (ie the output port) 2 The ratio, B represents the voltage V applied on port 1 1 with the short-circuit current I measured on the 2-port 2 The ratio of, C represents the current I applied on port 1 2 with measuring the open circuit voltage V on the 2-port 2 The ratio of D represents the current I applied on port 1 1with the short-circuit current I measur...
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The invention discloses a series dual-port negative impedance converter for signal enveloping distortion compensation. The converter is characterized in that the converter is based on improvements of a floating negative impedance converter with a differential structure; a three-port network structure is improved into a dual-port network structure, that is, a differential input anode is improved into an input port, a differential input cathode is improved into an output port, and an original differential output port is removed, so that the dual-port negative impedance converter with the series feature is achieved; and non-Foster features of a transmission coefficient of an overall circuit of the impedance converter are adjusted through resistors connected with anode input ports and cathode input ports of operational amplifiers and an impedor connected between the operational amplifiers, so that the enveloping dispersion compensation for square wave signals subjected to distortion by a high-pass filter can be achieved. The converter provided by the invention overcomes the defect that the traditional negative impedance converter can only be connected in parallel, has the characteristics of small size, high simplicity in structure, high adjustment precision and the like, and achieves circuit transmission coefficient adjustments and application prospects in dispersion compensation for circuits of a radio frequency transceiver and the like.
Description
technical field [0001] The invention relates to a negative impedance converter, in particular to a serial double-port negative impedance converter used for signal envelope distortion compensation. Background technique [0002] Distortion is inevitable during signal transmission. Whether it is in electronic circuits, radio frequency microwave circuits, optical fiber communications, or in space signal transmission, as long as the signal has bandwidth, it will be subject to varying degrees of distortion. Distortion is the main reason for inhibiting transmission distance, transmission accuracy, and transmission quality during signal transmission. Among the many types of distortion, the most common and also the most important is group delay distortion. In signal transmission, group delay refers to a phase response that exhibits a negative slope for a given frequency, resulting in a delay relative to the envelope of the original signal waveform. When different frequency compone...
Claims
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IPC IPC(8): H03H11/04H03H11/28
CPCH03H11/0422H03H11/28
Inventor 王春叶德信冉立新孙永志乔闪
Owner ZHEJIANG UNIV
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