SU1582154A1 - Twelve-pole meter of complex index of reflection - Google Patents

Abstract

This invention relates to a microwave measurement technique. The purpose of the invention is to simplify the meter. The meter contains a source of 1 microwave oscillations, a six-arm distributor 2 microwave power, directional couplers (BUT) 3 and 4, the studied microwave device 5 and meters 6 - 9 power. The reference power from source 1 is transmitted by distributor 2 to device 5, as well as to BUT 3 and 4, where amplitude-phase summation of powers occurs. Results are fed to meters 6 through 9. By their relative indications, the complex reflection coefficient is measured. Measuring instrument according to claims 2 to 7 formulas are distinguished by the performance of a distributor 2 consisting of BUT 10 and 11. 6 c.p. f-ly, 6 ill.

Description

1

31

The invention relates to a technique for measuring at microwave frequencies and can be used to measure complex reflectance coefficient (ECC), as well as in devices for measuring S-parameters of microwave devices.

The aim of the invention is to simplify a twelve-pole complex reflection coefficient meter.

FIG. Figures 1-6 show the electrical wiring diagrams of the twelve-pole complex reflection coefficient meter, variants.

The twelve-pole complex reflection coefficient meter contains a source of 1 microwave oscillations, a six-valve distributor 2 (for example, a double directional coupler) microwave power, the first 3 and second 4 directional couplers, the microwave device 5 under study and the first second 7, third 8 and fourth 9 power meters

The six-way dispenser 2 can be made on the basis of the third and fourth directional couplers 10 and 11 (e.g., 90 or 180 ° connections) ",

A twolar pole complex reflection coefficient meter works as follows.

The reference power from the output of the microwave source 1 is transmitted by a six-arm distributor 2 to the microwave device 5 under study, with the parts of the reference power from the second, third, fourth and fifth shoulders

The type distributor 2 is respectively supplied to the first and second inputs of the first 3 and second 4 directional couplers (Fig. 1,3,5).

When the device is executed according to the schemes shown in FIG. 2, 4 and 6, parts of the reference power from the second and fourth arms of the six-arm distributor 2 are respectively supplied to the first inputs of the first 3 and second 4 directional couplers, and parts of the reference power from the third and fifth arms of the six-arm distributor 2 4 and the first 3 directional taps.

In the directional couplers 3 and 4, the amplitude-phase summation of the powers supplied to their inputs occurs.

54

As a result, in the case of quadratic detection, the readings of the first (second, third, and fourth power meters (P, PJ, P3, and P4) can be written as:

4 where b

 -gl arl2- - 4/2 Y h-8);

 ZZ OP2- Y +

 1b | 2 (| r12 + 2 / 2x + 2);

 i | V | 2-2V2X + 2),

(one)

- complex amplitude of the wave generated by the source of microwave oscillations; P, X,

Y-module, real and imaginary parts of the measured complex reflection coefficient of the microwave device under study.

i

From the system of equations (1) receive

R,

thirty

(2)

P J, P4

 Measuring the ECC using a twelve-pole meter reduces to determining the relative readings of the power meters from the system of equations (2):

P PI + A. o)

 Р | Г + А.Р V

where i 1-3;

about. - real constants;

A0 - complex constants.

Unknown constants are determined using known methods for calibrating twelve-pole reflectometers.

Claims (5)

Invention Formula 1, Twelve-pole complex reflection coefficient meter containing a source of microwave oscillations, six-arm power distributor-1 51 UHF, amplitude-phase summing unit and four power meters, characterized in that, in order to simplify it, the amplitude-phase summation unit is made on the basis of the first and second directional couplers, while the source of microwave oscillations is connected to the first shoulder of the six-shoulder distributor the second and third shoulders of which are connected respectively to the first and second arms of the first directional coupler, the fourth and fifth arms are connected respectively to the first and second arms of the second directional response The sixth arm serves to connect the device under investigation, and the first and second, respectively, first, second, third, and fourth power meters are connected to the third and fourth arms of the first and second directional couplers, and the sixth-sleeved distributor is made as a serial connection of the third and fourth directional couplers. the path of the third directional coupler is the first shoulder of the six-arm distributor, and the output of the main path of the fourth directional coupler is Steady shoulder six-arm dispenser. 2. The meter according to claim 2, wherein the second and third, fourth and fifth arms of the six-arm distributor are the input and output of the secondary path, one third of its directional coupler, the input of the primary path and the output of the secondary path of the fourth directional coupler, respectively. 3. Meter according to Claim 1, characterized in that, the second, third, fourth and fifth arms 821546 The six arms are the secondary path input of the third directional coupler, the output of the secondary path, the input of the primary path, the fourth directional coupler, and the output of the secondary path of the third directional coupler, respectively. Jq 4. The meter according to claim. TRM, that the second, third, fourth and fifth arms of the six-arm distributor are the input and output of the secondary path, the third 15 of its directional coupler, the input and output of the secondary path of the fourth directional coupler, respectively. 5. The meter according to claim 1, 20 and 20 in that the third, fourth, second and fifth arms of the six-arm distributor are the output, the input of the secondary path of the third directional coupler, the input 25 and the output of the secondary path of the fourth directional coupler, respectively. 6 "The meter according to claim. 2, characterized in that 30, the third, fourth and fifth arms of the six-armed distribute are the input of the secondary path, the primary path of the third directional coupler, the input of the primary path and the output of the secondary path of the fourth directional branch of the corresponding 7 o The meter according to claim. 2, characterized in that The 40th, third and fourth arms of the six-arm distributor are the input of the secondary path, the output of the primary path of the third directional coupler, the output of the secondary path 45 and the input of the primary path of the fourth directional coupler, respectively. 35 P5 L if FIG. 2 fig.Z Xz a Fig FIG. S B