JPS5661801A - Coaxial matching circuit - Google Patents

Coaxial matching circuit

Info

Publication number
JPS5661801A
JPS5661801A JP13915179A JP13915179A JPS5661801A JP S5661801 A JPS5661801 A JP S5661801A JP 13915179 A JP13915179 A JP 13915179A JP 13915179 A JP13915179 A JP 13915179A JP S5661801 A JPS5661801 A JP S5661801A
Authority
JP
Japan
Prior art keywords
coaxial
impedance
lines
wavelength
line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13915179A
Other languages
Japanese (ja)
Inventor
Takeo Imai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP13915179A priority Critical patent/JPS5661801A/en
Publication of JPS5661801A publication Critical patent/JPS5661801A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/202—Coaxial filters

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Waveguide Connection Structure (AREA)

Abstract

PURPOSE:To obtain a coaxial matching circuit of a simple structure, by giving a vertical connection to the 1/4-wavelength coaxial lines having different characteristic impedances and then using some of the above-mentioned coaxial lines for the low pass filters to block the propagation of the undesired wave. CONSTITUTION:The LPF type 1/4-wavelength transformer 13 consists of the coaxial lines 131-133 having different characteristic impedances Za, Zb and Za each. The characteristic impedance is set as Z0 for both the circulator and the coaxial line 15, and the characteristic impedance of the coaxial line 3 is set as Z1. And the impedance ZL is set for the coaxial line 18 and the varactor diode 1, and the length is selected at lambdaU/4 with the unnecessary frequency fU and for the lines 131-133. Thus the line between B and C is turned into the 3/4-wavelength impedance transformer at fU, and the impedance becomes as ZC=Zb<4>/(Za<2>+ZL) when viewed from the point C. Accordingly, the propagation of the undesired wave fU can be blocked by reducing the ZC enough after selecting Za and Zb. Thus the individual parts of the circuit can be eliminated. As a result, the struture can be simplified, thus realizing a device having a high resistance to the undesired wave.
JP13915179A 1979-10-25 1979-10-25 Coaxial matching circuit Pending JPS5661801A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13915179A JPS5661801A (en) 1979-10-25 1979-10-25 Coaxial matching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13915179A JPS5661801A (en) 1979-10-25 1979-10-25 Coaxial matching circuit

Publications (1)

Publication Number Publication Date
JPS5661801A true JPS5661801A (en) 1981-05-27

Family

ID=15238743

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13915179A Pending JPS5661801A (en) 1979-10-25 1979-10-25 Coaxial matching circuit

Country Status (1)

Country Link
JP (1) JPS5661801A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1326299A3 (en) * 2001-12-18 2003-10-15 Murata Manufacturing Co., Ltd. Low-pass filter
JP2015112017A (en) * 2015-03-05 2015-06-18 住友電気工業株式会社 Transformer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1326299A3 (en) * 2001-12-18 2003-10-15 Murata Manufacturing Co., Ltd. Low-pass filter
US6861929B2 (en) 2001-12-18 2005-03-01 Murata Manufacturing Co., Ltd. Low-pass filter
JP2015112017A (en) * 2015-03-05 2015-06-18 住友電気工業株式会社 Transformer

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