RU1800523C - Dielectric resonator - Google Patents

Abstract

The invention relates to microwave technology and can be used in frequency selective circuits. The purpose of the invention is to improve the linearity of the tuning. The dielectric resonator contains a cylindrical composite-adjustment element 1, consisting of a dielectric part 2, a dielectric strip 3 and a metal part 4 connected to a screw 5 mounted on the cover of the metal screen 6. The ring dielectric resonator 7 is mounted on a dielectric stand 8 mounted on a substrate 9

Description

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a micro-strip line 10, on the opposite side of which are bonded conductor 11. The holes in the ring dielectric resonator 7, the dielectric stand 8 and the composite cylindrical adjustment element 1 have the same diameter. Thanks to the implementation of the composite cylindrical element

The invention relates to microwave technology and may find application in radio engineering devices: local oscillators, filters and discriminators.

The purpose of the invention is to improve the linearity of the tuning.

The drawing shows the construction of a dielectric resonator.

The dielectric resonator comprises a cylindrical tuning element 1, consisting of a dielectric 2 and a metal 4 parts separated by a dielectric gasket 3. The metal part of the tuning element goes into -int 5 passing through the upper wall of the metal screen 6. The ring dielectric resonator 7 is mounted on annular

a dielectric substrate 8, mounted on a substrate 9 of a microstrip line 10, on the opposite side of which are applied conductors 11 of an asymmetric strip line 10. The substrate 9 of the microstrip line is fixed at the bottom of the metal screen 6. A hole in the ring dielectric resonator 7, a composite cylindrical adjustment element 1, a ring substrate 8. are coaxial and have the same diameter.

The device operates as follows.

The dielectric resonator is excited by a microwave signal from an asymmetric microstrip line 10, on which there is a ring dielectric substrate 8, which is necessary for

 increasing the distance between the ring dielectric resonator 7 and the wide conductor 11 of the microstrip line 10. The movement of the dielectric 2 and meteorological 1 from the metal and dielectric parts A, 2, which have the opposite effect on the shift of the resonant frequency and separated by a dielectric strip 3 from the dielectric with a lower value of e, linearity adjustment is achieved. 1 ill.

For the 4 parts of the composite cylindrical tuning element 1, the screw 5 is located in the upper wall of the metal shield 6. When the dielectric part 2 of the tuning element 1 is inside the ring dielectric resonator 7, the minimum frequency is observed. If the metal part 4 of the tuning element 1 is located inside the ring dielectric resonator 7, the maximum frequency of the dielectric resonator will be observed. When smoothly moving the tuning element, the frequencies of the dielectric and metal parts along the axis of the ring dielectric resonator, all intermediate frequencies between the minimum and maximum values are realized while maintaining the linear dependence of the resonator frequency on the movement of the tuning element.

Formula A dielectric resonator comprising a metal screen, inside of which an annular dielectric resonator is coaxially located, in the opening of which there is a cylindrical tuning element mounted with the possibility of axial movement and whose diameter is equal to the diameter of the hole ring dielectric resonator, characterized in that, in order to improve the linearity of the tuning, the cylindrical tuning element is made in the form of a composite rod of a dielectric and a metal, separated gasket dielectric .menshim value relative permittivity.