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Impedance transformer with Chebyshev filter property of multi-order transmission lines and short-circuited lines, and preparation method

An impedance converter, Chebyshev's technology, applied in the direction of impedance network, instrument, multi-terminal pair network, etc., can solve the problems such as the complexity of the circuit board manufacturing process, achieve smooth filtering characteristics, high flexibility, and reduce the number of effects

Inactive Publication Date: 2019-04-26
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need for more short wires, the circuit board is very complicated in the production process

Method used

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  • Impedance transformer with Chebyshev filter property of multi-order transmission lines and short-circuited lines, and preparation method
  • Impedance transformer with Chebyshev filter property of multi-order transmission lines and short-circuited lines, and preparation method
  • Impedance transformer with Chebyshev filter property of multi-order transmission lines and short-circuited lines, and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Such as figure 2 As shown, this embodiment is a 4th-order transmission line, which is arranged in series between the input unit and the output unit in sequence. The number of short lines is 2 sections, which are symmetrically distributed on both sides of the center of the 4th-order transmission line. Specifically, the first section is short The wiring is arranged between the first section of the transmission line and the second section of the transmission line, and the second section of short wiring is arranged between the third section of the transmission line and the fourth section of the transmission line, so as to obtain the Chebyshev equal ripple filter characteristic.

Embodiment 2

[0070] Such as image 3 As shown, this embodiment is a 4th-order transmission line, which is arranged in series between the input unit and the output unit in sequence. The number of short lines is 2 sections, which are symmetrically distributed on both sides of the center of the 4th-order transmission line. Specifically, the first section is short The wiring is arranged between the first section of the transmission line and the input end unit, and the second section of short wiring is arranged between the fourth section of the transmission line and the output end unit. In this case, compared with Embodiment 1, the electrical length and characteristic impedance of the short wires are changed. In this case, you can choose different options according to your own engineering needs.

Embodiment 3

[0072] Such as Figure 4 As shown, this embodiment is a 4th-order transmission line, which is arranged in series between the input unit and the output unit in sequence, and the number of short-circuits is 3 sections, one of which is set at the center of the 4th-order transmission line, and the remaining two short-circuits are symmetrical It is set on both sides of the center of the 4th-order transmission line. The specific first section of the short line is set between the second section of the transmission line and the third section of the transmission line, and a specific value is selected. The second section of the short line is set between the first section of the transmission line and the third section of the transmission line. Between the second section of transmission lines, the third section of short-circuit wires is arranged between the third section of transmission lines and the fourth section of transmission lines.

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Abstract

The invention discloses an impedance transformer with Chebyshev filter property of multi-order transmission lines and short-circuited line. The impedance transformer comprises an input end unit and anoutput end unit, impedance transformation units serially connected between the input end unit and the output end unit in order through the multi-order transmission lines, and short-circuited lines, wherein the amount of the short-circuited line is not more than that of the multi-order transmission line; when the multi-order transmission lines are in the odd-order, the number of the short-circuitlines is odd segments and the short-circuited lines are symmetrically distributed at two sides of the center of the multi-order transmission lines; when the multi-order transmission lines are in even-order and the number of the short-circuited line is even segments, the short-circuited lines are symmetrically distributed at two sides of the center of the multi-order transmission lines; when the multi-order transmissions lines are in even-order and the number of the short-circuited line is odd segments, a segment of short-circuited line is arranged at the center of the multi-order transmissionlines, and the rest short-circuited lines are symmetrically distributed at two sides of the center of the multi-order transmission lines. The invention further provides a preparation method of the impedance transformer with Chebyshev filter property of the multi-order transmission lines and short-circuited lines.

Description

technical field [0001] The invention relates to the technical field of radio frequency circuit microstrip line device manufacturing, more specifically, the invention relates to an impedance converter with Chebyshev filter characteristics of multi-order transmission lines and short-circuit lines and a preparation method. Background technique [0002] With the rapid development of the times, the demand for information elements in the whole society is increasing day by day. Human beings have been using electricity and electromagnetics to transmit information from the earliest era of wolf smoke to the present, and have greatly improved in the field of communication technology. Among them, electromagnetic transmission of information has become the mainstay of the entire modern communication technology. In the wireless electromagnetic transmission of information, sending equipment and receiving equipment are required, and the impedance converter plays a very important role. When...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H7/01G06F17/50G06F17/16
CPCG06F17/16G06F30/20G06F30/39G06F2119/18H03H7/01
Inventor 王小龙包春喜吴斌王庆凤卢革宇
Owner JILIN UNIV
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