WO2019119657A1 - All-dielectric hybrid resonance structure and filter - Google Patents

Abstract

Disclosed in the present invention are an all-dielectric hybrid resonance structure and a filter. The structure comprises a single cavity block and a dielectric resonance rod disposed in the single cavity block. The single cavity block is an all-dielectric single cavity block. The dielectric resonance rod comprises a coaxially disposed middle resonance unit and end portion resonance units. At least one end portion resonance unit is disposed at each of two ends of the middle resonance unit. The dielectric constant of the middle resonance unit is greater than that of the end portion resonance unit and that of the all-dielectric single cavity block. The present invention has a simple structure and can meet the requirements of a cavity dielectric filter for a higher Q value and smaller volume.

Description

All-media hybrid resonant structure and filter Technical field

The invention relates to a resonant structure and a filter, and belongs to the technical field of passive antenna feeder devices in the field of wireless network communication, in particular to an all-media hybrid resonant structure and a filter for a filter.

Background technique

With the rapid development of the fourth generation of mobile communication to the fifth generation of mobile communication, the requirements for high performance and miniaturization of communication equipment are increasing, and the use of dielectric filters is gradually becoming more frequent. The traditional TM mode dielectric filter mostly adopts a single dielectric constant resonance mode, and the single dielectric resonator is grounded up and down to compress the volume in the height direction, but the Q value is compared with the same volume of the metal cavity body filter after volume compression. There is no advantage, so the filter uses a dielectric resonator but the insertion loss is not reduced.

Summary of the invention

In view of the above drawbacks of the prior art, the object of the present invention is to solve the deficiencies of the above background art, and to provide an all-media hybrid resonant structure and a filter, which not only has a simple structure, but also can satisfy a cavity dielectric filter. Q value and smaller volume requirements.

In order to solve the above technical problem, the present invention employs an all-media hybrid resonant structure for a filter, comprising a single cavity block and a dielectric resonator rod disposed in the single cavity block, the single cavity block being an all medium a single cavity block, the dielectric resonance bar includes a coaxially arranged intermediate resonance unit and an end resonance unit, at least one end of the intermediate resonance unit is disposed with at least one of the end resonance units, and the intermediate resonance unit is interposed The electrical constant is greater than the dielectric constant of the end resonant unit, and the dielectric constant of the intermediate resonant unit is greater than the dielectric constant of the all-medium single cavity block.

In a preferred embodiment of the invention, the number of said end resonating units disposed at opposite ends of the intermediate resonating unit corresponds.

In a preferred embodiment of the present invention, each end of the intermediate resonating unit is provided with at least two of the end resonating units, and the end resonant unit of the intermediate resonating unit has a dielectric constant greater than that of the intermediate resonating unit. The dielectric constant of the end resonant unit of the cell.

In a preferred embodiment of the invention, the length of the intermediate resonating unit is greater than the length of the end resonating unit.

In a preferred embodiment of the invention, the length and dielectric constant of the two end resonating units arranged symmetrically with respect to the intermediate resonating unit are equal.

In a preferred embodiment of the present invention, the intermediate resonating unit and the end resonating unit are in close contact, or the intermediate resonating unit and the end resonating unit are formed in a split structure, the intermediate resonating unit And the end resonance unit is spliced into a unitary structure.

In a preferred embodiment of the invention, the dielectric resonator rod is arranged in a cylinder, a cube or a rectangular parallelepiped, and is internally provided with a hollow or centrally disposed as a through hole or a blind hole.

In a preferred embodiment of the invention, the all-media single-chamber block is arranged in a cylinder, a cube or a cuboid.

In a preferred embodiment of the invention, the dielectric resonator rod is filled at an inner bore of the all-media single-chamber block and bonded or crimped with the all-media single-chamber block.

The invention also discloses a filter equipped with an all-medium hybrid resonant structure, comprising a cavity, a cover plate and a coupling tuning screw, the cover plate is disposed above the cavity, and the coupling tuning screw is disposed in the cavity A plurality of dielectric resonators are disposed in the cavity, wherein the dielectric resonator is an all-medium hybrid resonant structure.

The invention has the advantages that the invention has the advantages of simple structure and convenient installation and use, and the single-chamber block is designed as a full-medium single-cavity block, and the dielectric resonant rod is made into a segment-type structure, and the intermediate segment is ensured by The dielectric constant of the dielectric resonator rod is greater than the dielectric constant of the dielectric resonator rod of the remaining segments and the dielectric constant of the all-media single-chamber block, so that the effective single-cavity block can effectively improve the single structure without changing the remaining structure of the existing resonator. The cavity Q value is more than 10% higher than that of the conventional TM single-dielectric constant resonator, and compared to the conventional TM single mode, this mode can form dual mode and multimode under a specific shape and size combination, compared to the TM double The grounded single-dielectric constant resonator has a large volume reduction of 1/3 or more; at the same time, the invention can adjust the number of end resonant units at both ends of the intermediate resonant unit as needed while maintaining the total height of the resonant rod, thereby effectively Adjusting the size of the Q value; the invention facilitates the positioning and assembly of the dielectric resonator rod by integrally processing the intermediate resonance unit and the end resonance unit, by using the intermediate resonance unit and The resonant unit of the portion is controlled by the split type to facilitate the control of the Q value of the dielectric resonant rod; the shape of the intermediate resonant unit and the end resonant unit of the present invention may be a cylinder, a rectangular parallelepiped, a cube, or the like, or a combination of the above shapes; In order to meet the requirements of environmental temperature change and reliability, the temperature compensation of the intermediate resonance unit can be adjusted by adjusting the material properties of the intermediate resonance unit, so that the electrical performance is more stable under the full temperature environment, and the end resonance unit is enhanced in order to enhance the reliability of the structure. The elastic material may be used so that it does not cause failure due to different expansion coefficients of different materials when the ambient temperature changes rapidly; the filter with the mixed medium resonance structure disclosed in the present invention has a metal wall inside the cavity. The materials used are aluminum, copper, steel, etc. Non-metallic materials such as plastics and composite materials can also be used to make the inner wall of the cavity have electrical conductivity by electroplating silver or copper; after simulation, the electric field strength is the largest on the side of the cavity. In the long-term high-temperature and high-power environment, it is possible to consider adding heat sinks on the side of the cavity. Cooling teeth and integral casting cavity, cooling fins may be arranged separately outside the chamber, to reduce the external temperature of the entire cavity.

DRAWINGS

1 is an exploded view of an all-medium hybrid resonant structure in accordance with an embodiment of the present invention;

2 is a front elevational view of an all-medium hybrid resonant structure in accordance with an embodiment of the present invention;

3 is a cross-sectional view showing an all-medium hybrid resonant structure according to an embodiment of the present invention;

4 is a top plan view of an all-medium hybrid resonant structure in accordance with an embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The structure of the all-medium hybrid resonant structure shown in the drawings of the present invention shows that the present invention comprises a single cavity block and a dielectric resonator rod 1 disposed in the single cavity block, and the single cavity block is an all-medium single cavity block 4 The five-sided silver coating of the all-medium single-cavity block 4, one side of which is not coated with silver, can be printed on the circuit for signal input and output, frequency and coupling adjustment, and the dielectric resonant rod 1 includes a coaxially arranged intermediate resonant unit. 2 and the end resonating unit 3, the single cavity block is the all medium single cavity block 4, the intermediate resonating unit 2 and the end resonating unit 3 can be different dielectric constant materials, such as ceramics, plastics, etc., the intermediate resonant unit 2 At least one end resonating unit 3 is disposed at each end, the dielectric constant of the intermediate resonating unit 2 is greater than the dielectric constant of the end resonating unit 3, and the dielectric constant of the intermediate resonating unit 2 is greater than that of the all-medium single-chamber block 4. Electric constant. It should be noted that, on the premise of ensuring the total height of the intermediate resonating unit 2 and maintaining the dielectric resonant rod 1, the end resonating unit 3 may be disposed at both ends of the intermediate resonating unit 2 according to the magnitude of the Q value, generally located at both ends of the intermediate resonating unit 2. The end resonating unit 3 is symmetrically arranged and symmetrically increased, but the end resonating unit 3 at one end thereof may be further divided into a plurality of segments, and the above technical solutions are all within the protection scope of the present invention, and at the same time, all the end resonating units 3 The dielectric constants are all smaller than the dielectric constant of the intermediate resonating unit 2, the lengths of all the end resonating units 3 are smaller than the length of the intermediate resonating unit 2, and the dielectric constant of the end resonating unit 3 near the intermediate resonating unit 2 is greater than the farther away. The dielectric constant of the end resonating unit 3 of the intermediate resonating unit 2, and so on, the dielectric constant of the end resonating unit 3 in contact with the bottom of the cavity and the inner surface of the cover is minimized. In order to better increase the Q value, the length and dielectric constant of the two end resonating units 3 symmetrically arranged with respect to the intermediate resonating unit 2 are equal.

The forming of the dielectric resonant rod 1 includes two schemes: 1. an integrated solution: the intermediate resonant unit 2 and the end resonant unit 3 are formed by a one-piece structure, that is, integrally molded by a mold, and the dielectric constant of each unit is changed. A material having a different dielectric constant is formed at a predetermined position in the mold.

2. Split solution: The intermediate resonant unit 2 and the end resonant unit 3 are formed by a split structure, and the intermediate resonant unit 2 and the end resonant unit 3 are connected by splicing into a unitary structure.

Regardless of the integrated solution or the split solution, the all-medium single-chamber block 4, the intermediate resonating unit 2, and the end resonating unit 3 may each be one of a cylindrical shape, a rectangular parallelepiped shape, and a rectangular parallelepiped shape, and the intermediate resonant unit 2 and Each of the end resonating units 3 may be solid or hollow. The all-media single-chamber block 4 and the resonant rod shape may be cross-combined, such as a cylindrical dielectric rod installed in a rectangular parallelepiped or a square single cavity; or a rectangular parallelepiped dielectric rod installation In a rectangular parallelepiped or a rectangular parallelepiped or the like, air is interposed between the dielectric combination resonant rod and the inner wall of the cavity, and the dielectric rod and the single cavity can form a dual mode and a multimode in a specific size and shape; the intermediate resonance unit 2 and the end resonance The dielectric constant of the material of the unit 3 is not equal; the intermediate resonant unit 2 has a solid cylindrical shape or a hollow sleeve shape. The end resonating unit 3 has a solid cylindrical shape or a hollow sleeve shape. The end resonating unit 3 is made of a dielectric material, preferably an elastic material. The dielectric resonator rod 1 is filled in the inner hole of the all-media single-chamber block 4 and is bonded or crimped to the all-media single-chamber block 4, and the end resonating unit 3 and the all-media sheet at both ends of the dielectric resonator rod 1 The end faces of the cavity block 4 are flush.

The invention also discloses a filter equipped with a mixed medium resonance structure, comprising a cavity 4, a cover plate 5 and a coupling tuning screw 6, the cover plate 5 is disposed above the cavity 4, and the coupling tuning screw 6 is disposed in the cavity In the chamber 4, a plurality of dielectric resonators are disposed in the cavity 4. The dielectric resonator is an all-media hybrid resonant structure for the filter, and the lower end surface of the mixed dielectric resonant structure is in close contact with the bottom of the cavity 4, and the mixed medium The upper end surface of the resonant structure is in close contact with the cover 5. The inner wall of the cavity 4 is made of metal, and the material may be aluminum, copper, steel, or the like. Non-metallic materials such as plastics and composite materials may be used to provide electrical conductivity to the inner wall of the cavity by electroplating silver or copper. The electric field intensity of the cavity 4 is the largest. In the long-term high temperature and high power environment, it is considered to add a heat sink on the side of the cavity. The heat dissipating tooth can be integrated with the cavity die-casting, or the heat sink can be separately arranged outside the cavity to reduce the entire cavity. Internal and external temperature.

The cover structure of the patent of the invention can overcome the above drawbacks, and the upper and lower combined structures of the dielectric rods of two different dielectric constants can greatly increase the single-cavity Q value, and the Q value of the conventional TM single-constant current resonator is increased by more than 10%. And compared to the conventional TM single mode, this mode can form dual mode and multi mode under a specific shape and size combination, and the volume is greatly reduced by 1/3 or more compared with the TM double-ended grounded single dielectric constant resonator.

In the first embodiment, in a single cavity size of 20*20*20, the dielectric constant of the dielectric block is 43, the dielectric constant of the dielectric rod 1 and the dielectric rod 3 is 1.5, and the dielectric constant of the dielectric rod 2 is 80, and When the diameter of the three dielectric rods is 18.5, the medium-mixed single-cavity Q value is close to 10000 at a frequency of 1800 MHz, and is a degenerate dual mode.

The all-medium hybrid resonant single cavity realized by the above method has a single cavity Q value greater than 10% and above with respect to the same volume and the same frequency TEM mode resonance.

Embodiment 2, in a single cavity size of 20*20*20, the dielectric constant of the dielectric block is 43, the dielectric constant of the dielectric rod 1 and the dielectric rod 3 is 3, and the dielectric constant of the dielectric rod 4 and the dielectric rod 5 1, the dielectric rod 2 has a dielectric constant of 80, and the diameter of the five dielectric rods is 18.5. At a frequency of 1800 MHz, the medium mixed single cavity Q value is close to 10,000, and is a degenerate dual mode. The Q value tested has little difference from the value Q of the first embodiment, but the cost and assembly complexity will increase.

The all-medium hybrid resonant single cavity realized by the above method has a single cavity Q value greater than 10% and above with respect to the same volume and the same frequency TEM mode resonance.

It should be understood that the above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any one skilled in the art can easily think of changes within the technical scope disclosed by the present invention. Or, replacement, should be covered by the scope of the present invention.

Claims (10)

An all-media hybrid resonant structure comprising a single cavity block and a dielectric resonator rod (1) disposed in the single cavity block, wherein the single cavity block is an all-media single-chamber block (4), the medium The resonant rod (1) includes an intermediate resonant unit (2) and an end resonating unit (3) disposed coaxially, and at least one end of the intermediate resonating unit (2) is disposed with one of the end resonating units (3) The intermediate resonant unit (2) has a dielectric constant greater than a dielectric constant of the end resonant unit (3), and the intermediate resonant unit (2) has a dielectric constant greater than the all-medium single-cavity block (4) The dielectric constant of ). The all-media hybrid resonant structure according to claim 1, characterized in that the number of said end resonating units (3) disposed at both ends of the intermediate resonating unit (2) corresponds to each other. The all-media hybrid resonant structure according to claim 2, characterized in that each end of the intermediate resonating unit (2) is provided with at least two of the end resonating units (3) adjacent to the intermediate resonating unit (2) The dielectric constant of the end resonating unit (3) is greater than the dielectric constant of the end resonating unit (3) remote from the intermediate resonating unit (2). The all-media hybrid resonant structure according to claim 3, characterized in that the length of the intermediate resonating unit (2) is greater than the length of the end resonating unit (3). The all-media hybrid resonant structure according to claim 4, characterized in that the lengths and dielectric constants of the two end resonating units (3) arranged symmetrically with respect to the intermediate resonating unit (2) are equal. The all-media hybrid resonant structure according to claim 1, wherein said intermediate resonating unit (2) and said end resonating unit (3) are in close contact, or said intermediate resonating unit (2) and said The end resonating unit (3) is formed by a split structure, and the intermediate resonating unit (2) and the end resonating unit (3) are spliced into a unitary structure. The all-media hybrid resonant structure according to claim 1, characterized in that the dielectric resonant rod (1) is arranged in a cylinder, a square or a rectangular parallelepiped, and the inside thereof is arranged to be hollow, or the center is arranged as a through hole or a blind hole. . The all-media hybrid resonant structure according to claim 1, characterized in that the all-medium single-cavity block (4) is arranged in a cylinder, a cube or a rectangular parallelepiped. The all-media hybrid resonant structure according to claim 1, wherein said dielectric resonator rod (1) is filled in an inner hole of said all-medium single-chamber block (4) and said all-medium single-chamber block (4) Bonding or crimping. A filter equipped with an all-media hybrid resonant structure includes a cavity (4), a cover plate (5) and a coupling tuning screw (6), and the cover plate (5) is disposed above the cavity (4) The coupling tuning screw (6) is disposed in the cavity (4), and the cavity (4) is provided with a plurality of dielectric resonators, wherein the dielectric resonator is any of claims 1-9 An all-media hybrid resonant structure as claimed in any of the preceding claims.

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