RU216325U1 - VARIABLE VSWR WAVEGUIDE LOAD - Google Patents

Abstract

The utility model relates to microwave technology, in particular to waveguide auxiliary load devices, and can be used for measuring and technological purposes. A waveguide load with a variable standing wave ratio in voltage, containing a waveguide channel, an absorber and a micrometer screw, which includes a double waveguide tee, one of the side arms of which is connected to a short circuit, and the other to a movable short circuit moved by a micrometer screw, waveguide matched load a high power level is connected to one of the two remaining arms of the double waveguide tee, while the other remaining arm is the input and output of the device; meanwhile, double waveguide tee, high power waveguide termination, short-circuiter and moving short-circuiter can be connected directly. The technical result of the proposed utility model is the ability to smoothly change the VSWR of the waveguide load from the minimum value, determined by the intrinsic VSWR of the double waveguide tee and the waveguide matched load, to the maximum value, determined by the losses in the waveguide path of the device, when working with high power signals without replacing the elements of the waveguide path . 3 ill.

Description

The utility model relates to microwave technology, in particular to waveguide auxiliary load devices, and can be used for measuring and technological purposes.

The mismatched moving load is known (NRP-3, -4, -5). This load contains a waveguide channel in which an absorber is located, which is moved by a micrometer screw. The design of these loads provides a given level of mismatch (values of the voltage standing wave ratio (VSWR) 1.2; 1.4 and 2.0, respectively) in the operating frequency band and allows you to change the phase of the reflection coefficient by moving the absorber in the waveguide using a micrometer screw [1 ,2, 3]. The disadvantages of this device are the discreteness of the change in the value of VSWR, the need to replace the load on the NRP with a different rating to change the value of the VSWR. a small number of NRP ratings and a low level of maximum allowable power dissipation.

Closest to the claimed technical solution is the device disclosed in the document US 3366875 [4]. This device contains a double waveguide tee, to the side arms of which short-circuiters are attached, moved by micrometric screws, a matched load is attached to the E-arm of the double waveguide tee, and a second double waveguide tee is attached to the H-arm by the side arm, the E- and H-arms of which are connected with a generator and a detector, respectively, and the remaining side arm is connected to a matched load. The design of this device

allows you to smoothly change its VSWR from the minimum value determined by the intrinsic VSWR of the waveguide path and matched loads, to the maximum value determined by the losses in the waveguide path of the device. The disadvantages of this technical solution are the complexity of the design and the inability to work with high power signals.

The technical task of the presented solution is to provide the possibility of a smooth change in the load VSWR over a wide range when working with high power signals without the need to replace parts of the waveguide path.

The technical problem is solved due to the fact that the waveguide load with a variable standing wave ratio in voltage, containing a waveguide channel, an absorber and a micrometer screw, also contains a double waveguide tee, one of the side arms of which is connected to a short circuit, and the other - to a movable short circuit, movable micrometric screw, a high-power waveguide load is connected to one of the two remaining arms of the double waveguide tee, while the other remaining arm is the input and output of the device.

Double waveguide tee, high power waveguide termination, short circuiter and moving short circuiter can be connected directly.

The claimed device has a set of essential features that are not known from the prior art for devices of this purpose, which allows us to conclude that the utility model meets the "novelty" criterion.

The essence of the proposed technical solution is explained with the help of figures, where

in fig. 1 shows an electrical schematic diagram of a waveguide load with a variable standing wave ratio according to

voltage when using the H-arm of a double waveguide tee as an input / output;

in fig. 2 is an electrical schematic diagram of a variable standing wave ratio waveguide load using the E-arm of a double waveguide tee as input/output;

in fig. 3 shows a general view of a waveguide load with a variable voltage standing wave ratio, while the movable short circuit is shown in a local section.

A waveguide load with a variable standing wave ratio in voltage consists of a double waveguide tee 1, one of the side arms of which is connected to a short circuit 3, and the other to a movable short circuit 4 moved by a micrometric screw 5, a high power level matched waveguide load 2 is connected to one of the the two remaining arms of the double waveguide tee, while the other remaining arm 6 is the input and output of the device. For the variant of the waveguide load with a variable voltage standing wave ratio shown in Fig. 3, the input and output 6 of the device is the H-arm of the double waveguide tee 1.

Load waveguide with a variable standing wave ratio voltage works as follows.

The electromagnetic wave enters the load input 6 with a variable voltage standing wave ratio, which for the variant shown in FIG. 3, is the H-arm of the double waveguide tee 1, is divided equally and in phase between the side arms of the double waveguide tee 1. The electromagnetic waves obtained after division propagate in the side arms of the double waveguide tee 1 and then are reflected, respectively, from the short-circuit 3 and the movable short-circuit 4. Reflected electromagnetic waves are summed up in

double waveguide tee 1 and, depending on the phase difference, enter the load output 6 with a variable voltage standing wave ratio, which for the variant shown in Fig. 3 is the H-arm of the double waveguide tee 1 (the in-phase component of the electromagnetic wave obtained by summation), or the E-arm of the double waveguide tee 1 (the out-of-phase component of the electromagnetic wave obtained by summation). The ratio of the in-phase and anti-phase components of the electromagnetic wave obtained by summing the electromagnetic waves reflected from the short circuit 3 and the movable short circuit 4 depends on the position of the movable short circuit 4, which is adjusted by the micrometer screw 5, which ensures a smooth adjustment of the VSWR. From the output of the E-arm, the electromagnetic wave enters the waveguide matched load of high power level 2, which ensures its absorption. When using the E-arm of a double waveguide tee as input/output 6, the principle of operation of the variable voltage standing wave ratio load remains the same, except that the electromagnetic wave arriving at input 6 is divided equally and out of phase between the side arms of the double waveguide tee 1 .

The technical result of the proposed utility model is the ability to smoothly change the VSWR of the waveguide load from the minimum value, determined by the intrinsic VSWR of the double waveguide tee and the waveguide matched load of a high power level, to the maximum value, determined by losses in the waveguide path of the device, when working with high power signals without replacement elements of the waveguide path. To implement the proposed device in the conditions of serial production, there is no need to develop complex technological devices and use expensive technological processes.

Samples of loads with a variable voltage standing wave ratio were made, which confirmed the correctness and practical feasibility of the described technical solution. This confirms the compliance of this technical solution with the criterion of "industrial applicability" for the utility model.

Claims (2)

1. A waveguide load with a variable standing wave ratio in voltage, containing a waveguide channel, an absorber and a micrometric screw, characterized in that a double waveguide tee is introduced into its composition, one of the side arms of which is connected to a short circuit, and the other to a movable short circuit movable micrometric screw, a high-power waveguide load is connected to one of the two remaining arms of the double waveguide tee, while the other remaining arm is the input and output of the device. 2. Waveguide load with a variable voltage standing wave ratio according to claim 1, characterized in that a double waveguide tee, a high power level waveguide matched load, a short circuit and a movable short circuit are connected directly.

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