RU213532U1 - Pass-through power converter based on the use of a matrix of thermistor microwave sensors - Google Patents

Abstract

Utility model A feed-through type power converter based on the use of a matrix of thermistor microwave sensors is designed to measure the power of electromagnetic oscillations in waveguide paths. The conversion of the power of electromagnetic oscillations is carried out in a matrix of thermistor microwave sensors, the resistance of which changes under the influence of the power of electromagnetic oscillations. Structurally, the through-type power converter is a waveguide directional coupler with two waveguide channels. The main channel contains an input, an output, a communication area made in the form of a set of square holes through which the transition to the auxiliary channel is made. An absorbing load is installed in the auxiliary channel up to the communication area. A waveguide step matching transformer, an array of thermistor microwave sensors and an additional absorbing load are located in series behind the communication area. The outputs of the thermistor microwave sensors are connected to a pad located on the outer wall of the matching transformer, connecting it with a connector for connecting to an autobahn thermite bridge. The proposed design of the utility model makes it possible to reduce the mismatch with the measuring path, reduce the error in measuring the power of electromagnetic oscillations, reduce the weight and size characteristics, and also simplify the design.

Description

The utility model relates to measuring equipment, pass-through type wattmeters (power calibrators), designed to measure and transmit a unit of power of electromagnetic oscillations in the microwave frequency range in waveguide paths.

Known waveguide power calibrator containing a directional coupler, consisting of three waveguide channels: the first channel is the input, at the end of which there is an absorbing load, the second channel is fixed on top of the first and connected to it through the communication area, in this channel, on the one hand, an absorbing load is installed, with the other output to which is connected a terminal-type power converter in a protective casing, the third channel is located below and is connected through the communication area to the first channel, an absorbing load is installed in it on one side, on the other side the output remains open for connecting the calibrated (calibrated) measuring instrument.

).The disadvantages of a feed-through type power converter are manufacturing complexity, large weight and size characteristics, as well as incomplete coordination with the measuring path, which is characterized by the modulus of the effective reflection coefficient of the output of a feed-through wattmeter (hereinafter referred to as

).

As the closest analogue (prototype) taken waveguide power calibrators M1-10, M1-11 [1].

, рассогласование с трактом, которое приводит к дополнительной погрешности измерений мощности электромагнитных колебаний, а также большие масса-габаритные характеристики.The disadvantages of the prototype include the great importance

, mismatch with the path, which leads to an additional measurement error of the power of electromagnetic oscillations, as well as large weight-dimensional characteristics.

, что повышает точность измерений мощности электромагнитных колебаний, а также уменьшение масса-габаритных характеристик.The technical result is a reduction

, which increases the accuracy of measurements of the power of electromagnetic oscillations, as well as a decrease in weight and overall characteristics.

The technical result is achieved due to the fact that the through-type power converter includes a waveguide directional coupler with two waveguide channels, the main channel contains an input and an output, a communication area made in the form of a set of square holes through which the transition to the auxiliary channel is made, in the auxiliary an absorbing load is installed in the channel up to the communication area, then a waveguide step matching transformer, a matrix of thermistor microwave sensors and an additional absorbing load are located in series behind the communication area, the leads of the matrix of thermistor microwave sensors are connected to a contact pad located on the outer wall of the matching transformer, connecting it with connector for connecting an auto-balancing thermistor bridge.

Device shown

in fig. 1, where: a) top sectional view and b) right sectional view along section A; 1 - main channel of the waveguide, 2 - communication area, 3 - auxiliary channel, 4 - waveguide step matching transformer, 5 - matrix of thermistor microwave sensors, 6 - pad, 7 - absorbing load, 8 - additional absorbing load, 9 - connector for connecting an auto-balance thermistor bridge, 10 - protective case, 11 - additional protective case; 12 - input of the main channel, 13 - output of the main channel.

The pass-through type power converter based on the use of a matrix of thermistor microwave sensors is similar to the prototype in the following features: there is a main waveguide channel (1) with a connection area made in the form of a set of square holes (2), a working thermistor is located in the auxiliary channel (3) , the developed device differs in that a matching transformer (4) is used, in which a matrix of thermistor microwave sensors (5) is located, there is no third waveguide channel, which simplifies the design, the outputs of the working thermistors are connected to a contact pad (6) fixed on the outer part of the waveguide transformer, behind the thermistor microwave sensors there is an absorbing load (8), the matching transformer with thermistor microwave sensors is closed by a protective case (10), on which there is a connector for connecting to an auto-balance thermistor bridge (9), and additionally the entire structure is closed by a protective case ( eleven).

не более 0,03 в рабочем диапазоне частот волноводного тракта.The design of the through-type power converter based on the use of a matrix of thermistor microwave sensors makes it possible to provide the value

not more than 0.03 in the operating frequency range of the waveguide path.

This device works as follows.

Microwave power is supplied to the input, while the electromagnetic wave propagating in the main channel of the waveguide, through the communication area, part of the signal enters the auxiliary channel, in it it sequentially propagates through a matching transformer, behind which there is a matrix of thermistors, passes along the thermistors arranged in series parallel to the narrow wall, for additional coordination, an absorbing load is installed. Each of the thermistors is included in its own auto-balancing thermistor bridge, which maintains the specified value of the thermistor's resistance to direct current. The microwave power absorbed by each thermistor is measured by the displacement method, with the microwave power being replaced by DC power, the measurement of which is determined by measuring the voltage across each autobalancing thermistor bridge, taking into account the operating resistances of the thermistors and bridge resistors.

To achieve the stated technical result, a matrix of microwave sensors is used, a communication area in the form of square holes and absorbing loads, this allows us to provide the declared characteristics of the utility model and thereby reduce the mismatch error, increase the accuracy of transmitting a unit of power of electromagnetic oscillations. By reducing the dimensions, it is possible to reduce the weight and size characteristics.

Sources of information

[1] - Waveguide power calibrators M1 208.003.PS.

Claims (1)

Pass-through type power converter, including a waveguide directional coupler with two waveguide channels, the main channel contains an input, an output and a communication area made in the form of a set of square holes through which the transition to the auxiliary channel is made, an absorbing load is installed in the auxiliary channel up to the communication area , further behind the communication area, a waveguide step matching transformer, a matrix of thermistor microwave sensors and an additional absorbing load are located in series, the leads of the matrix of thermistor microwave sensors are connected to a pad located on the outer wall of the matching transformer, connecting it with a connector for connecting an auto-balance thermistor bridge.

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