SU1345140A1 - Method of calibrating contact device - Google Patents

Method of calibrating contact device Download PDF

Info

Publication number
SU1345140A1
SU1345140A1 SU864013224A SU4013224A SU1345140A1 SU 1345140 A1 SU1345140 A1 SU 1345140A1 SU 864013224 A SU864013224 A SU 864013224A SU 4013224 A SU4013224 A SU 4013224A SU 1345140 A1 SU1345140 A1 SU 1345140A1
Authority
SU
USSR - Soviet Union
Prior art keywords
strip
contact device
coaxial
input
output
Prior art date
Application number
SU864013224A
Other languages
Russian (ru)
Inventor
Сергей Михайлович Никулин
Виталий Владимирович Петров
Original Assignee
Горьковский политехнический институт им.А.А.Жданова
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 Горьковский политехнический институт им.А.А.Жданова filed Critical Горьковский политехнический институт им.А.А.Жданова
Priority to SU864013224A priority Critical patent/SU1345140A1/en
Application granted granted Critical
Publication of SU1345140A1 publication Critical patent/SU1345140A1/en

Links

Abstract

The invention relates to the field of radio metering technology and provides an increase in performance and an increase in calibration accuracy. The device implementing the equipment contains r.r microwave 1, power divider 2, four directional couplers 3-6, HF unit 7 switches, meter 8 phase difference and level ratio, contact device 9. 2 Il. 1 (L with 4 SL 4 O cpu & i

Description

one

The invention relates to a radiometric measuring technique and can be used to calibrate contact devices when measuring parameters of stripline and microstrip devices of the microwave range.

The aim of the invention is to increase productivity and increase calibration accuracy,

Fig. 1 shows a structurally electrically-electric diagram of a device implementing a method for calibrating a contact device; Fig. 2: a — four strip lines of the transmission line IXK b open at the end of the segment b a strip of the transmission line with a characteristic impedance Zg and length L; c - working line strip transmission.,

The device for calibrating the contact device comprises a microwave generator 1, a power divider 2, a first, second, third, fourth directional response WITCHES 3-6, a high frequency switch unit 7, a meter 8 of phase differences and level ratios, a contact device 9.

The device for calibrating the contact device operates as follows.

From the microwave generator 1, the microwave signal through the divider 2-power, first 3, second 4 and third 5 and fourth 6 respectively, directional couplers 3, 4, 5, b is fed to contact device 6.

Operations in the measurement of the complex reflection coefficients at the input of the coaxial-sex of the Osk transition,

The switch unit 7 is set to the position at which the signal a is fed to the reference channel and to the measuring channel - C. A piece of a strip transmission line open at the end is connected to the input contact node. The complex reflection coefficient T is measured at the input of the coaxial-strip junction using a phase difference meter

, 1 / a,.

Operations in measuring the complex reflection coefficients at the output of the strip-coaxial junction.

The high-frequency switch unit 7 is set to a position at which a signal a is fed to the reference channel and b to the measuring channel. Connect to the output contact node of the strip strip line before

ten

5 20

25

zo

40

dd

3451402

chi, open on ko} sheh. The complex reflection coefficient, fj bj / a, is measured at the output of the strip-coaxial transition with a gauge 8.

The following designations are introduced: a ,, a, are the complex amplitudes of the incident waves in the coaxial sections of the first and second connections of the contact node, respectively; b are the complex amplitudes of the reflected waves in the coaxial sections of the contacts of the first and second points; r, r. - the ratio of the complex amplitudes of the reflected and incident waves in the coaxial cross sections of the contacts of the contact node when a pass measure is placed in the contact node and excited from both sides by coherent signals; A is a parameter that allows one of the unknowns to be determined during calibration — constant distribution

- those And e.

This parameter can be found from the measurement results of the reflection coefficients at the input and output of the contact device when four strip-shaped transmission lines open at the end of the segments are connected to the input or output contact node, the length of which changes by 1,

B is an auxiliary parameter allowing the determination of another unknown value — the reflection coefficient from the open end of the stripline transmission line G.

Measurement is required to determine | and fj by a stripline transmission line segment with a characteristic impedance Z under two-sided excitation of the contact node.

Based on the measured reflection coefficients at the input and output of the contact device from the output

35

A. e-TS-1.1,

() 2,

LLin.) ..)

where -h fr - g (r. I g J)

(G ,,

- one

in on) in

VI - constant distribution

transmission lines; n - number of contact node

(input, output), the value v is determined.

Using the obtained value of A, from the system of equations

Y, + A, + A ,,, r ,, K 0, 1.2, determine Y, Yjn Yj associated with the parameters of the contact nodes by the relations

S ;, Y, n; S, Y2, / r,

 -Ybn / To, where A S 1, S 22 - S 12 S j ,;

Sj. - elements of the matrix of parameters of the scattering of contact nodes; - the reflection coefficient from the open end of the strip transmission line.

To determine the G included in these expressions, a segment of a strip transmission line with a characteristic impedance Zg of length L connecting the two contact nodes is installed in the contact device (Fig. 2B). According to the values of the ratio of the complex amplitudes of the microwave waves p, Pj at the input and output of the contact device, when two-sided excitation of the contact device G is determined from the ratio

Г А - / - В 1 о а D,

where in -J 1У11 1-П1-.

1 Vi. - Pi UE - Pi When a measurement object is installed in the contact device (Fig. 2b), conversion to the reference plane, measured in a coaxial section, is performed using the expression

from h

 bijil f J i.4

Pxx 1 - S f

n wv

Claims (1)

  1. Formula from b. Rete n and 40
    The method of calibration of the contact device, including the measurement of the complex reflection coefficients (G where K is 1, 2, 3, 4) at the input of the coaxial-strip transition of the contact device and (G, where K 1, 2, 3, 4) at the output of the strip-coaxial the transition of the contact device with their successive loading on four open at the end of a segment of strip transmission lines with an arbitrary characteristic impedance Z, whose lengths differ by a fixed amount, lying within / 1/8 - 3 / V8, where h is the wavelength in the strip line, and feed and a coaxial input-or output strip junction stripline-coax transition microwave signal, connection between
    the input and output contact nodes of the contact device of a strip of a strip transmission line with a characteristic impedance Z and a microwave signal at the input of a coaxial-strip junction, characterized in that, in order to increase performance and increase the accuracy of calibration, the complex amplitudes of direct amplitudes are measured , and reverse
    L J L UHF signals at the input of the coaxial-strip junction of the contact device a and the output of the strip-coaxial contact device p. when serving on
    the output of the strip-coaxial junction of the contact device of the microwave signal and determine the elements of the matrix S. S-- and determine the matrix dp
    IT P i JL P
    contact device according to the formulas Yj; Sj-ih;
    4n -Yjn / TO; l S - S, S ,. S, where n is an input or output contact node ,;
    V v ln 2n
      are determined from a system of equations.
    YI, + A, -G ,. Y. +, G,
       Sl, (
    2 r 2
     ) (- GSH)
    ) -;
      (g, g-t; 7 s ;; g-y; y
    4 .i XlLli PLXii i XllI
     I w, (
    1 is the length of an open segment of a strip transmission line, L is the length of a segment of a strip transmission line j
    y is the constant distribution of the stripline transmission line ..
    Editor L.Povkhan
    Compiled by V.Ezhov Tehred M.Hodanich
    Order 4916/45 Draw 729 Subscription
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk .ab., d, 4/5
     , - - - -
    Production and printing company, Uzhgorod, st. Project, 4
    FIG. 2
    Proofreader A.Vorovich
SU864013224A 1986-01-27 1986-01-27 Method of calibrating contact device SU1345140A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU864013224A SU1345140A1 (en) 1986-01-27 1986-01-27 Method of calibrating contact device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU864013224A SU1345140A1 (en) 1986-01-27 1986-01-27 Method of calibrating contact device

Publications (1)

Publication Number Publication Date
SU1345140A1 true SU1345140A1 (en) 1987-10-15

Family

ID=21218289

Family Applications (1)

Application Number Title Priority Date Filing Date
SU864013224A SU1345140A1 (en) 1986-01-27 1986-01-27 Method of calibrating contact device

Country Status (1)

Country Link
SU (1) SU1345140A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5434511A (en) * 1993-05-24 1995-07-18 Atn Microwave, Inc. Electronic microwave calibration device
US5537046A (en) * 1993-05-24 1996-07-16 Atn Microwave, Inc. Electronic calibration method and apparatus
US6081125A (en) * 1993-08-30 2000-06-27 Rohde & Schwarz Gmbh & Co. Kg Network analyzer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Silva E.F., Me. Phun Ж. Calibration of an automatic network ana- lizer, using transmission lines of unknown caracteristic impedance loss and dispersion. The Radio and Electronic Engineers, 1978, Vol 48, No 5, p. 227-234. Авторское свидетельство СССР № 1084703, кл. G 01 R 27/28, 1982. *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5434511A (en) * 1993-05-24 1995-07-18 Atn Microwave, Inc. Electronic microwave calibration device
US5537046A (en) * 1993-05-24 1996-07-16 Atn Microwave, Inc. Electronic calibration method and apparatus
US5548221A (en) * 1993-05-24 1996-08-20 Atn Microwave, Inc. Electronic calibration method and apparatus
US5552714A (en) * 1993-05-24 1996-09-03 Atn Microwave, Inc. Electronic calibration method and apparatus
US5578932A (en) * 1993-05-24 1996-11-26 Atn Microwave, Inc. Method and apparatus for providing and calibrating a multiport network analyzer
US6081125A (en) * 1993-08-30 2000-06-27 Rohde & Schwarz Gmbh & Co. Kg Network analyzer

Similar Documents

Publication Publication Date Title
Hakki et al. A dielectric resonator method of measuring inductive capacities in the millimeter range
Engen The six-port reflectometer: An alternative network analyzer
Stuchly et al. Equivalent circuit of an open-ended coaxial line in a lossy dielectric
US4842477A (en) Active clearance control
US5561378A (en) Circuit probe for measuring a differential circuit
Hunton Analysis of microwave measurement techniques by means of signal flow graphs
US2423390A (en) Reflectometer for transmission lines and wave guides
US4044353A (en) Microwave level gaging system
Monteath Coupled transmission lines as symmetrical directional couplers
US2411553A (en) Radio-frequency power measurement
US4680538A (en) Millimeter wave vector network analyzer
US2498548A (en) Comparator circuit
GB731473A (en) Improvements in or relating to electromagnetic wave-guiding members and apparatus
US4546311A (en) Arrangement for measuring moisture content
Hansson et al. An ideal six-port network consisting of a matched reciprocal lossless five-port and a perfect directional coupler
US5440236A (en) Calibrating a network analyzer by making multiple measurements on a common transmission line with a movable discontinuity
JPS5580061A (en) Frequency measuring apparatus
US6348804B1 (en) Vector network analyzer
US4489271A (en) Reflection coefficient measurements
US5495173A (en) Method and apparatus for characterizing a differential circuit
Ellerbruch UHF and microwave phase-shift measurements
Lewis Mode couplers and multimode measurement techniques
EP0265073B1 (en) Test arrangement
Beatty Impedance measurements and standards for uniconductor waveguide
US4381485A (en) Microwave test apparatus and method