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CN-224218373-U - Short wave impedance matcher

CN224218373UCN 224218373 UCN224218373 UCN 224218373UCN-224218373-U

Abstract

The utility model discloses a short wave impedance matcher. The short wave impedance matcher is used for carrying out impedance transformation between an input resistor and an output resistor with different impedances and comprises at least two coaxial lines arranged between the input resistor and the output resistor, wherein a magnetic ring is embedded outside at least one coaxial line of the at least two coaxial lines, and the coaxial lines comprise an inner conductor, an insulating layer and an outer conductor which are connected in an embedded mode from inside to outside. According to the electromagnetic coupling principle, the coaxial line and the magnetic ring are introduced to replace inductance and capacitance as matching elements, and broadband impedance matching of short-wave frequency is successfully realized only through serial connection, parallel connection and other forms of the coaxial line. The utility model has the advantages of simple realization, small volume, wide frequency band, large bearing power and the like, and has wide application prospect in various radio frequency circuit devices such as an amplifier, an antenna and the like.

Inventors

  • XIA YUNQIANG

Assignees

  • 成都信息工程大学

Dates

Publication Date
20260508
Application Date
20250422

Claims (5)

  1. 1. The short wave impedance matcher is used for carrying out impedance transformation between an input resistor (210) and an output resistor (220) with different impedances and is characterized by comprising at least two coaxial lines arranged between the input resistor (210) and the output resistor (220), wherein a magnetic ring (110) is embedded outside at least one coaxial line of the at least two coaxial lines, and the coaxial lines comprise an inner conductor (120), an insulating layer (130) and an outer conductor (140) which are connected in an embedded mode from inside to outside.
  2. 2. The short wave impedance matcher of claim 1 wherein the input resistor (210) is disposed at an input of the short wave impedance matcher and the output resistor (220) is disposed at an output of the short wave impedance matcher, the impedance of the output resistor (220) being 2, 3 or 4 times the impedance of the input resistor (210).
  3. 3. The short wave impedance matcher of claim 2 wherein when the impedance of the output resistor (220) is 2 times that of the input resistor (210), two coaxial lines are arranged between the input resistor (210) and the output resistor (220), and magnetic rings (110) are nested outside the two coaxial lines; The output end of the input resistor (210) is respectively connected with the head end of the inner conductor (120) of the first coaxial line (310), the head end of the inner conductor (120) of the second coaxial line (320) and the tail end of the outer conductor (140) of the second coaxial line (320); The input end of the output resistor (220) is respectively connected with the tail end of the inner conductor (120) of the first coaxial line (310) and the tail end of the inner conductor (120) of the second coaxial line (320); The head end of the outer conductor (140) of the first coaxial line (310) is grounded, and the tail end of the outer conductor (140) of the first coaxial line (310) is connected with the head end of the outer conductor (140) of the second coaxial line (320); the impedance of the first coaxial line (310) and the second coaxial line (320) is equal to the impedance of the output resistor (220).
  4. 4. The short wave impedance matcher of claim 2 wherein when the impedance of the output resistor (220) is 3 times that of the input resistor (210), four coaxial lines are arranged between the input resistor (210) and the output resistor (220), and magnetic rings (110) are nested outside the four coaxial lines; The output end of the input resistor (210) is respectively connected with the head end of the inner conductor (120) of the first coaxial line (310), the head end of the inner conductor (120) of the second coaxial line (320) and the head end of the inner conductor (120) of the fourth coaxial line (340); the input end of the output resistor (220) is respectively connected with the tail end of the inner conductor (120) of the first coaxial line (310) and the tail end of the inner conductor (120) of the third coaxial line (330); The head end of the outer conductor (140) of the first coaxial line (310) is connected with the head end of the outer conductor (140) of the second coaxial line (320), and the tail end of the outer conductor (140) of the first coaxial line (310) is connected with the tail end of the inner conductor (120) of the second coaxial line (320); The head end of the outer conductor (140) of the second coaxial line (320) is connected with the head end of the inner conductor (120) of the third coaxial line (330); the head end of the outer conductor (140) of the third coaxial line (330) is connected with the head end of the outer conductor (140) of the fourth coaxial line (340); The tail end of the outer conductor (140) of the second coaxial line (320), the tail end of the outer conductor (140) of the third coaxial line (330) and the tail end of the inner conductor (120) of the fourth coaxial line (340) are connected; The head end and the tail end of the outer conductor (140) of the fourth coaxial line (340) are grounded; The impedance of the first coaxial line (310), the second coaxial line (320), the third coaxial line (330) and the fourth coaxial line (340) is equal to the impedance of the output resistor (220).
  5. 5. The short wave impedance matcher of claim 2 wherein when the impedance of the output resistor (220) is 4 times the impedance of the input resistor (210), two coaxial lines are provided between the input resistor (210) and the output resistor (220), and only the first coaxial line (310) is externally nested with the magnetic ring (110); the output end of the input resistor (210) is respectively connected with the head end of the inner conductor (120) of the first coaxial line (310) and the head end of the inner conductor (120) of the second coaxial line (320); The input end of the output resistor (220) is connected with the tail end of the inner conductor (120) of the first coaxial line (310); The head end of the outer conductor (140) of the first coaxial line (310) is connected with the head end of the outer conductor (140) of the second coaxial line (320), and the tail end of the outer conductor (140) of the first coaxial line (310) is connected with the tail end of the inner conductor (120) of the second coaxial line (320); The head end and the tail end of the outer conductor (140) of the second coaxial line (320) are grounded; The impedance of the first coaxial line (310) and the second coaxial line (320) is equal to half the impedance of the output resistor (220).

Description

Short wave impedance matcher Technical Field The utility model relates to the technical field of impedance matchers, in particular to a short wave impedance matcher. Background In order to realize effective transmission of electromagnetic waves, the impedance matching must be realized by the radio frequency circuit port, so that the impedance matcher is a basic radio frequency device and is widely applied to various radio frequency circuit devices such as amplifiers, antennas and the like. Short waves are a very important part of the radio frequency range, ranging from 3MHz to 30MHz, and the corresponding wavelength range is 10-100 m. If a quarter-wavelength impedance matcher is adopted in the frequency band, the circuit size is very large, and engineering is not practical. If the inductance and capacitance are adopted to realize impedance matching, the working frequency is very narrow, broadband matching cannot be realized, and if broadband matching is realized, multistage inductance and capacitance are needed to realize, so that a matching circuit is complex, and the insertion loss of the circuit is increased. Therefore, there is no short wave impedance matcher with small size, wide bandwidth and high bearing power. Disclosure of utility model The utility model aims to solve the technical problem of providing a short wave impedance matcher with small size, wide frequency band and high bearing power, which comprises the following technical scheme: The short wave impedance matcher is used for carrying out impedance transformation between an input resistor and an output resistor with different impedances and comprises at least two coaxial lines arranged between the input resistor and the output resistor, wherein a magnetic ring is embedded outside at least one coaxial line of the at least two coaxial lines, and the coaxial lines comprise an inner conductor, an insulating layer and an outer conductor which are connected in an embedded mode from inside to outside. The short wave impedance matcher is further improved in that the input resistor is arranged at the input end of the short wave impedance matcher, the output resistor is arranged at the output end of the short wave impedance matcher, and the impedance of the output resistor is 2 times, 3 times or 4 times that of the input resistor. When the impedance of the output resistor is 2 times of that of the input resistor, two coaxial lines are arranged between the input resistor and the output resistor, magnetic rings are nested outside the two coaxial lines, the output end of the input resistor is respectively connected with the head end of the inner conductor of the first coaxial line, the head end of the inner conductor of the second coaxial line and the tail end of the outer conductor of the second coaxial line, the input end of the output resistor is respectively connected with the tail end of the inner conductor of the first coaxial line and the tail end of the inner conductor of the second coaxial line, the head end of the outer conductor of the first coaxial line is grounded, the tail end of the outer conductor of the first coaxial line is connected with the head end of the outer conductor of the second coaxial line, and the impedance of the first coaxial line and the second coaxial line is equal to that of the output resistor. The short wave impedance matcher is further improved in that when the impedance of the output resistor is 3 times that of the input resistor, four coaxial lines are arranged between the input resistor and the output resistor, magnetic rings are embedded outside the four coaxial lines, the output end of the input resistor is connected with the inner conductor head end of the first coaxial line, the inner conductor head end of the second coaxial line and the inner conductor head end of the fourth coaxial line respectively, the input end of the output resistor is connected with the inner conductor tail end of the first coaxial line and the inner conductor tail end of the third coaxial line respectively, the outer conductor head end of the first coaxial line is connected with the outer conductor head end of the second coaxial line, the outer conductor tail end of the first coaxial line is connected with the inner conductor tail end of the second coaxial line, the outer conductor head end of the third coaxial line is connected with the outer conductor head end of the fourth coaxial line, the outer conductor tail end of the second coaxial line, the inner conductor tail end of the third coaxial line and the inner conductor tail end of the fourth coaxial line are grounded, and the outer conductor head end of the first coaxial line, the second coaxial line, the third coaxial line and the output impedance of the fourth coaxial line is equal to the impedance of the output resistor. When the impedance of the output resistor is 4 times of that of the input resistor, two coaxial lines are arranged between the input resistor and the output re