SU1180811A1 - Apparatus for measuring amplitude and phase of uhf-signals - Google Patents

Abstract

1. DEVICE FOR MEASURING Amplitude AND PHASES OF MICROWAVE SIGNALS, containing a segment of the microwave path, the input of which is an input for supplying the microwave signal under study, a source of coherent signal and a measuring instrument of amplitude and phase difference, characterized in that, in order to measure accuracy measurements by eliminating the influence of the parameters of the microwave paths, the first and second probes are inserted into it, connected respectively to the input and output of the RF path section, an adjustment unit consisting of a directional coupler whose primary line input is connected The code of the SBS tract, and the output with the first matched load, are serially connected adjustable phase shifters, the input of which is connected to the first output of the secondary line of the directional coupler, and the adjustable attenuator connected to the output from the output of the coherent signal source and the first input (L meter amplitude and difference phases, the second input of which is connected to the second output of the secondary line of the directional coupler, are connected to the outputs of the first and second probes respectively in series and a detector to light. 00 about 00

Description

.-. .C-TRIPLINE under item 1, (1 tl CChl yu C with e with the fact that the output / g of Gurvichnsl LNN1GI directional terminal connects with the first cell-Lagonal load and the BTopi.LM input of the measuring instrument amplitude and phase difference cherg) first managed CRM-nepeKL YuCh l GSL I.,.) i D)

 I Н: 1: -; ol g: -orich

nachrl lines; L P

Ill, P GT; VET: GY: Prdpnen with; : i; if-M And lipllTf-jiH 1G ;; () ;;: and}; ОДе11амплнудуд and рап-лтгой BTopoii 1 saying: he

by; | ch1p1 coy: volunteer; ir: (l right - l OM1 gi (; HF switch),

one

The invention relates to a pfvuso and inertelio 1 technique, in particular, to devices for measuring amp. and phases (HF signals, and a K quality test device can be used: 1 to measure the amplitudes of the distribution of the phasic distribution in a computer system or radio holographic system).

 invention - improving the accuracy of measurements by eliminating the influence of the parameters of the microwave paths,

FIG. Figure 1 shows the structural electrical circuit of the device for i-r3MepCFn H amplitude and phase (RF signal; pa of Fig. 2 — a device variant; ut of measurement of the amplitude and phase of a syphase.

YcTpoiicTBO l measurements of amplitude and phase (P) H-sig1-1alB contains segment 1 (HF path, source 2 of coherent signal of meter. 1 amplitude and phase difference, first) P and second probes 4 and 5, unit 6 of adjustment, state Pshch of directional coupler 7, adjustable phase shifter 8 and attenuator 9, the first coherent load 10, the detectors And and 12, the indicators 13 and 14, as well as the first control of the microwave switch 15, the second matched load 16 and the second controlled Microwave switch 17, the source 18 of the investigated (; RF signal.

The device works as follows.

The complex microwave signal, the amplitude and phase of which is required to determine, is the voltage of the incident wave coming from the output of the source 18 of the signal under study to the input of segment 1 of the microwave path (Fig. 1).

On BFiixcxie g Truth 1 (B-TRACK

this one is exploring

subject to comp .; The exocent coesbigi e; Transmit 11a p the length of the segment (; HF-tract:

I,,,

Chu -, 1 Phase p following,;

K - KSTMPLEKS - COEFLICTS

reductions for the ag lp l: ka 1 microwave tract with the mind 1 ag-ruzk {. Device lm and am 1l; TUD and PHASE S .HIF-SI1); - 1L (L ALLOWANCE (

J

to determine the amplitude / 1, / and gbs of the studied according to 15 measurements and signals at the output of segment 1 of the microwave path, i.e. distance from the source of the investigated signal. At the same time, the value of the coefficient n (the reduction of the section 1 of the microwave path to the cut) Tat measurement does not affect.

The signal under study is transmitted from the source of the signal under study to the input of segment 1 of the microwave path, it passes through what and from its input to the n (the course of block 6 of the control panel.

In the fi block of the regulation with reg-regulation 1, gkh attache 9 and phase 8, as well as; (..) About the coupler 7 form1 comme-irru1cii signals, i.e., cc: i.e. i am the signal. arrives from the first input of the adjusting unit 6 to the output of the section 1 of the microwave path and propagates along it towards the signal under investigation, while the resulting complex amplitude at the input and output of the section 1 of the microwave path is equal to:

.R .. ..

.in

.

(UK e

C

and

i. X

K, - | UJe

 ,

where and and and

resulting

BBG

8x complex amplitudes at the input and output of the segment V microwave tract, respectively;

H

and / and / e

k

the voltage of the compensating signal coming from the output of the adjustment unit 6 to the output of segment 1 of the microwave path

/P./, h; module and phase of this signal,

The measurement process is carried out at the bottom of the stage.

At the first stage, adjusting the amplitude and phase of the compensating signal establishes a standing wave node at the output of the microwave section 1, while the resulting voltage amplitude at the output of the microwave path 1 is equal to zero, and the compensating signal (the signal under study is connected by

To / and. - / u, / eJ

 /and. / e (v

x - - -

The moment of execution of the specified coupling is determined by the second indicator 14, the minimum indications of which correspond to zero voltage at the input of the second probe 5 connected to the output of the section 1 of the microwave path. At the same time, the signal is measured that comes from the second output of the adjustment unit 6 to the second input meter 3 amplitude and phase difference. This signal is connected to the compensating signal at the input of the adjustment unit 6 through the known transfer coefficient d of the directional responder .7, which allows determining the value of the compensating signal from the measurement result:

J rad.

kG ° isg |. “m,

at

de ./e known complex Z nyi voltage transfer ratio from the input of the primary line of the directional responder 7 to its first output of the secondary line, which is the output of the adjustment unit 6;

and and} m -,

iV,

IEM

/and.,"

/ e

measured value 1

signal on the first

stage of the second output of adjustment unit 6 In the second stage, by adjusting the amplitude and phase of the compensating voltage, a standing wave node is installed at the input of the microwave section 1, and the resulting voltage amplitude at the input of the microwave path 1 is equal to zero, and The seventh signals are related by:

iU

.)

.

J

"G

The implementation of this ratio is determined by the minimum indication of the indicator 13, corresponding to the zero voltage at the input of the first probe 4 connected to the input of segment 1 of the microwave path. In this case, as well as in the first stage, the signal is measured from the second output of the adjustment unit 6

This allows for the result of its measurement. determine the value of the compensating signal from the input of block 6 adjustment:; Lf

FROM w,

and.,

meas

2i

From the resulting expressions follows.

what

and.

II-II

and, -8 "k8X 8 Ki" i

Those. unknown signal equal to .c,

/ Ug. /and

and measurements can be expressed on the first

stages:

| and 1g U1UI and,

SLL, I

8x

JJ + IJ T

JVWSM. zm, 6 /

"E

iu,

izizm,

Claims (2)

1. DEVICE FOR MEASURING AMPLITUDE AND PHASE OF MICROWAVE SIGNALS, comprising a segment of the microwave path, the input of which is an input for supplying the microwave signal under investigation, a coherent signal source and an amplitude and phase difference meter, characterized in that, in order to increase the accuracy of measurements by excluding the influence of parameters of microwave paths, the first and second probes are introduced into it, included respectively at the input and output of a segment of the microwave path, an adjustment unit consisting of a directional coupler whose primary line input is connected to the output The microwave path, and the output with the first matched load, connected in series with an adjustable phase shifter, the input of which is connected to the first output of the secondary line of the directional coupler, and an adjustable attenuator connected by the output to the output of the coherent signal source and the first input of the amplitude and phase difference meter, the second input of which connected to the second output of the secondary line of the directional coupler, to the outputs of the first and second probes respectively connected in series with the detector and indicator torus. FIG. 1 1 li'iif! 2. The device ito p, 1, with the fact that the output of the primary line of the directional coupler is connected to the first matched load and the second input of the amplitude and phase difference meter through the introductions, the first controlled microwave transfer To l l · v! I Г (Ή J - J, Y)]) ··! J p · 'j - n ^; , 'V, ·} M - C (the ip and B · ON LINE NairLVL i |!'^'1': () 1 '| 1'IDI'T BAT RL I '(' (· DI NSN S VT OR KM VH ID | 'M in: / TRITs PJI I am amplitude and raditti fl ”and entered on it with o rj ι ds l in d 11 n o ι soda ν in k pi through introduced by rubbing in with the adjustable microwave switch. H n, i