SU1737578A1 - Resonator on forward three-dimensional waves - Google Patents

Abstract

Use: in resonant amplifiers, generators and filtering devices for low-power microwave signals in radio receiving and measuring equipment. SUMMARY OF THE INVENTION: The device comprises a magnetized ferrite film located on a dielectric base on which a conducting layer with a square-shaped sample is deposited, along the diagonal of which the input and output transducers are located. The diagonal of the square L and the thickness of the dielectric base d are related by: L, d - (0.15-0.35) L / JT, where n T7N; Cc is the wavenumber of direct volume magnetostatic waves in the sample area. Input and output transmission lines are coplanar „2 or„ „

Description

The invention relates to microwave technology and can be used in resonant amplifiers, generators, and various filtering devices for low-power microwave signals in receiving and measuring equipment, as well as in radar and radio interference processing systems.

Microwave resonators are known, consisting of input and output broadband single-element strip transducers mounted on a single-crystal film of an iron-etherium garnet grown on an ich substrate of gallium-gadolinium garnet, and made on the above-mentioned film of reflecting grids that form either single-cavity or two-cavity resonators, in which the input

output converters are parallel to each other.

The disadvantages of these resonators are the effect of parasitic interconnection due to the bi-directionality of the strip transducers on direct bulk magnetostatic waves (MW) when using coaxial resonators, the complexity of high-precision manufacturing technology, and large losses of the resonator.

Two cavity cavities are known on an MCB, in which the separation between the input and the output is increased due to the orthogonal arrangement of the axes of both cavities. However, such resonators have increased insertion loss values (20-32 dB).

i The closest in technical essence to the proposed is microwave-4

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31737578

resonator on direct bulk magnetostatic waves (PMSV) containing a magnetized ferrite film located on a dielectric base, on which coaxial transducers connected to the input and output transmission lines are coaxially mounted, with reflecting elements on both sides, edges which form an angle of 45 ° with the axis of the strip transducers, and absorbers, as well as a dielectric substrate with a conductive base, installed on the transducer side

The disadvantages of the known resonator are low Q and weak suppression of higher types of oscillations with

The aim of the invention is to increase the quality factor and increase the suppression of higher types of vibrations.

This goal is achieved through the use of the effect of total internal reflection in the case of an oblique incidence of the PMSS on the interface between the media, the parameters and the relative position of the elements of which are determined by the claimed ratios

The proposed resonator differs in the form of execution, dimensions, composition and connections of the elements, in which the discontinuities of the conductors along the PMSV propagation path are eliminated both along the vertical and the horizontal axis of the resonator,

Replacing the distributed reflecting structure of the system (gratings), each of the elements of which reflects only a small part of the wave incident on it, with a system of mirrors, where the interface between the media dimensions of the resonator dimensions almost completely reflects the working wave and does not reflect higher types of waves. comparison with the prototype, by eliminating the absorption loss in thin strips of the gratings, the radiation losses, and also the reflections in the system allows

Yig0 1 shows a schematic of a resonator on direct bulk magnetostatic waves (PMSB); Fig 2 - section AA on the needle 10

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A PMSV resonator contains a dielectric substrate 1 having a straight base 2 on one of its surfaces and a conductive layer (PS) 3 on its other surface. In the conductive layer 3, a square sample is taken, on the first diagonal of which is symmetrically relative to the second diagonal the square of the square has an input 4 output 5 microstrip converters The continuations of the input 4 and output 5 converters are located in slots made in the corners of the square, which together with parts of the conductive layer 3 form respectively 6 and output 7 co-planar transmission lines Immediately near the outer sides of converters 4 and 5 of the sides of the conductive layer 3 are absorbers 8 POMSWO Over the converters 4 and 5, the conductive layer 3 and absorbers 8 there is a dielectric layer (DS) 9, where the ferrite film (FP) is placed 10 The cross-dimensions of the DS 9 are chosen such that the DS completely overlaps the sample in the conductive layer 3 and the absorbers 8 "The thickness of the DS 9 is selected from the ratio d (0.15-0.35) L / n, where L is the length of the diagonal of the square, made in the conductive Loe 3; L n iT / K, the wavenumber of the nth working type of PMSV oscillations propagating in the OP 10 in the sampling region, n 1, N0 OP 10 has transverse dimensions equal to the transverse dimensions DS9 ,, Minimum by width 1 of the conductive layer 3, forming a mirror in a direction perpendicular to PMSSV

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to achieve the set goal. In addition, ® a diagonal of a square, on which the statute of this resonator on the MSSP is tuned out with the help of external elements and its manufacturing technology has been significantly simplified.

Improving the parameters of the resonator leads to an increase in its quality, and the simplification of the manufacturing technology and the elimination of the cost of tuning - to

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The input 4 and output 5 transducers are defined, determined from condition 1: 4L / H "Resonator on MSPT placed in an external magnetic field H, directed perpendicular to the OP 10 plane. The external magnetic field is created using a small-sized armored electromagnet.

reduce the cost of its manufacture and development, which as a result leads to economic benefits,

Yig0 1 shows a schematic of a resonator on direct bulk magnetostatic waves (PMSV); Fig 2 - section AA on the needle 10

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A PMSV resonator contains a dielectric substrate 1 having a conductive base 2 on one of its surfaces and a conductive layer (PS) 3 on its other surface layer. In the conductive layer 3, a square sample is made, the first diagonal of which is symmetrical to the second diagonal of the square input 4 and output 5 microstrip transducers The continuation of input 4 and output 5 transducers are located in slots made in the corners of the square, which, together with parts of conductive layer 3, form the corresponding The input 6 and output 7 co-planar transmission lines Directly next to the outer sides of conductive 4 and 5 sides of the conductive layer 3 are absorbers 8 MICROWAY Atop of converters 4 and 5, conductive layer 3 and absorbers 8 a dielectric layer is installed 9, where the ferrite film (FP) is placed 10 The cross-sectional dimensions of the DS 9 are chosen such that the DS completely overlaps the sample in the conductive layer 3 and the absorbers 8 "The thickness of the DS 9 is selected from the ratio d (0.15-0.35 ) L / n, where L is the length of the diagonal of the square, made in the wire present layer 3; L n iT / K, the wavenumber of the nth working type of oscillations of the MSP propagating in the OP 10 in the sampling region, n 1, N0 OP 10 has transverse dimensions equal to the transverse dimensions DS9 ,, The minimum width 1 of the conductive layer 3 forming for a MOPB reflective mirror in the direction perpendicular

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to "45

® diagonal m square on which the mouth

The input 4 and output 5 transducers are defined, determined from condition 1: 4L / H "Resonator on MSPT placed in an external magnetic field H, directed perpendicular to the OP 10 plane. The external magnetic field is created using a small-sized armored electromagnet.

this layer is equal to A 5

The resonator on the MSP works as follows

The microwave signal at the operating frequency fo through the input coplanar line 6 is fed to the input converter A. Which in LP 10 excites a MSSP propagating perpendicular to its axis on either side of the converter On the corresponding sides of the sample, made in the form of a square to a wire 3, The PMSV falls at an angle greater than for the working n-th type of oscillations the total internal reflection (PVO) angle in the system, which causes the PMSS to be almost completely reflected (the reflection coefficient is close to K1) from the interface between the PMSV and the of the sampling sides, made in PS 3 (square sides), at an angle equal to the angle of incidence (A5 °), in the direction of adjacent sides of the square, from which they are reradiated (angle of incidence equal to A5 ° is also greater than the angle of air defense) in the direction of the output converter 5, from where The microwave signal with a frequency f0 through coplanar line 7 enters the output of the resonator. At the same time, only at the frequency f0, determined by the value of L, the parameters of this theme and the value of the external magnetic field H, as a result of multiple in-phase reflections in the resonator, a standing wave is formed that forms an operating type of oscillation with a maximum field in the output converter 5 (Fig. 1 It can be seen that the length of each path of the beam, excited by an arbitrary point of the converter, is equal to L) o

When applying to the resonator input a microwave signal with a frequency. other than f0, the resonance conditions and the output signal are not satisfied in the system. The detail is attenuated by an amount determined by the selectivity of the resonator and the separation value between the input and output.

Due to the choice of the thickness of the dielectric layer 9 d - (0.15-0.35) L / n, higher types of vibrations propagate in the FP 10 in the direction of the absorbing layer 8 without noticeable reflection from the media interface. The minimum width of the conductive layer 3 in the direction PMSV 1 AL / ti distribution, which provides the required reflection of t

working mode and reduce losses in the system for absorption and radiation.- Directly to the edge of the conductive layer 3 is adjacent the absorbing layer 8, which prevents reflection from the outer edge of the conductive layer 3 and provides maximum absorption of higher types of resonator oscillations ,, 1

The resonator is tuned in frequency by varying the magnitude of the external magnetic field.

Claims (1)

Invention Formula The resonator on direct bulk magnetostatic waves, the contents of a magnetized ferrite film, located on a dielectric base, on which strip transducers connected to the input and output transmission lines are coaxially mounted Reflective elements are arranged, the edges of which constitute the A5 angle with the axis of the strip transducers, and the absorbers, as well as a dielectric substrate with a conductive base mounted on the transducer side, characterized in that, in order to increase the quality factor and increase the suppression of higher types of vibrations, reflecting the elements are made in the form of a conductive layer with a sample in the form of a square and slits in opposite corners in which the transducers are located, with the diagonal L of the square and the thickness of the dielectric base d is chosen equal (0.15-0.35) L / n, nlT / K d .n where n 1, n; Kn is the PMSV wave number in the sample area. 2 o A resonator according to claim 1, characterized in that the input and output transmission lines are coplanar, the current-carrying conductor of which is connected to the corresponding strip transducers, and the outer plates are formed by a conductive layer. entrance „I0X00 / f 10-Log 0x00 H, 3 one Fig 7 N5