SU1524115A1 - Device for stabilizing tuning frequency of ferrite member - Google Patents

Abstract

The invention relates to a microwave technique and is intended for use in systems with a continuous mode of operation or as an accurate ring in systems with a coarse tuning frequency stabilization ring. The purpose of the invention is to improve the accuracy of stabilization. The device contains a comparison element 1, a control block 2, a magnetic system 3 and a ferrite element (PV) 4. To achieve the goal, r-5 of the reference signal, a power divider 6, two circulators 7.8 are entered, and the comparison element 1 is implemented as microwave phase detector. When the destabilizing factors impact on the FE 4, its amplitude and phase x-k shift along the frequency axis, while the phase difference of the reference signal at the 1st and 2nd inputs of element 1 becomes different from zero. The occurrence of an error signal at the output of element 1 goes to the control inputs of the magnetic system 3. A corresponding change in the magnetic field returns the frequency x-ku of the FE 4 to the initial state. 1 il.

Description

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The invention relates to a microwave technique and is intended for use in systems with a continuous mode of operation or as an accurate ring in systems with a coarse tuning frequency control ring.

The aim of the invention is to improve the accuracy of stabilization.

The drawing shows a constructive scheme of the device for stabilizing the tuning frequency of a ferrite element.

A device for stabilizing the tuning frequency of a ferrite element contains a comparison element 1, which is made in the form of a microwave phase detector and the output of which is connected through a control unit 2 to the control input of the magnetic system 3, the ferrite element 4, the generator 5 of the reference signal, the output of which is connected to the input of the power divider 6, the first 7 and second 8 circulators, BTojioe and the third shoulders of the first circulator 7 are connected respectively to the input of the ferrite element 4 and to the first input of the element 1, the first and third shoulders of the second pa 8 are respectively connected to the output of the ferrite member 4 and to the second output of divider 6, a first leg of the first loop - torus 7 is an input device, and the second arm of the second circulator 8 - its output.

Device for stabilizing the tuning frequency of the ferrite element works as follows

When adjusting the device by selecting the length of the transmission line segment connected in series with the ferrite element 4, the voltage at the control input of the magnetic system 3 is set to zero, which is ensured by the coincidence of the phases of the reference signal from the generator 5 arriving at the first input of element 1 through the divider 6 the second circulator 8, the ferrite element 4 and the first circulator 7 with the reference signal of this generator

5, arriving as a reference to the second input of element 1 through a divider

6. The working microwave signal applied to the input of the device enters its output through the second arm of the first circulator 7, the ferrite element 4 and

The first shoulder of the second circulator 8. As a result, the working and reference signals pass through the ferrite element 4 at the same time, but in opposite directions, which, with appropriate matching of the ferrite element 4, are independent from the input and output side. This allows, in principle, the frequencies of the working and reference signals to be equal.

When the destabilizing factors affecting the ferrite element 4: temperature, vibrations, humidity and todo, its amplitude and phase characteristics shift along the frequency axis, while the phase difference of the reference signal on the first and second inputs of element 1 becomes different from zero. the output of the element -1, which through block 2 enters the control inputs of the magnetic system 3c. The corresponding change in the magnetic field returns the frequency response of the ferrite element 4 to the initial state.

Claims (1)

Invention Formula A device for stabilizing the tuning frequency of a ferrite element containing a comparison element, the output of which is connected through a control unit to a control input of a magnetic system, in the gap of which a ferrite element is placed, characterized in that, in order to improve the stabilization accuracy, a reference signal generator is introduced, a power divider , the first and second circulators, wherein the generator output is connected to the input of a power divider, the first output of which is connected to the first input of the reference element, the second output of the power divider with Connected to the third shoulder of the second circulator, the second shoulder of which is the output of the device, and its first shoulder connected to the output of the ferrite element, the third shoulder of the first circulator connected to the second input of the reference element, the first shoulder of the first circulator is the input of the device and its second arm is connected to the input of the ferrite element, the comparison element is made in the form of a microwave microwave phase detector,