Resonance tube and manufacture method of resonance tube, cavity filter

A manufacturing method and resonant tube technology, which can be used in the manufacture of resonators, waveguide devices, semiconductor/solid-state devices, etc., can solve the problems of high processing cost, high cost, compensation needs, and supply, etc., so as to reduce production costs and be suitable for use. performance, improve production efficiency

Active Publication Date: 2012-07-11
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regardless of the resonant tube made of any material, it can only provide a corresponding degree of temperature compensation through the fixed linear expansion coefficient of the material. Therefore, the resonant tube in the prior art only has the above-mentioned linear expansion coefficients to choose from, and cannot Completely according to the actual temperature compensation needs, provide resonant tubes with different linear expansion coefficient materials
In addition, the

Method used

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  • Resonance tube and manufacture method of resonance tube, cavity filter
  • Resonance tube and manufacture method of resonance tube, cavity filter
  • Resonance tube and manufacture method of resonance tube, cavity filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Embodiment 1 is a method for manufacturing a resonant tube in a cavity filter in the LTE (Long Term Evolution, long-term evolution technology) frequency band (2315-2375MHz), such as Figure 4 As shown, the method includes:

[0069] 201. Add the binder polypropylene and paraffin to the powder material containing 63% (mass percentage) of carbonyl iron powder and 37% (mass percentage) of carbonyl nickel powder, and mix well to form a paste , wherein the mass percentages of the powder material and the binder are 60-90% and 10-40%.

[0070] 202. Use a granulator to make the paste into strips or columns under the conditions of a working temperature of 150-300° C. and a working pressure of 5-10 MPa.

[0071] 203. Using an injection molding machine under the conditions of a working temperature of 200-300° C. and a working pressure of 40-50 MPa, inject and mold the particles to form a resonant tube blank.

[0072] Preferably, after the injection molding is completed, the mold ...

Embodiment 2

[0077] Embodiment 2 is at WiMax (Worldwide Interoperability for Microwave Access, global microwave interconnection access) 2.5GHz, the manufacturing method of the resonant tube in the filter that broadband is 20MHz, as Figure 5 As shown, the method includes:

[0078] 301. Add binder polypropylene and paraffin to the powder material containing 64% (mass percentage) of iron powder and 36% (mass percentage) of nickel powder, and mix uniformly to form a paste, wherein The mass percentages of the powder material and the binder are 60-90% and 10-40%.

[0079]302. Use a granulator to make the paste into strips or columns under the conditions of a working temperature of 210-250° C. and a working pressure of 7-10 MPa.

[0080] 303. Using an injection molding machine under the conditions of a working temperature of 250-300° C. and a working pressure of 40-50 MPa, inject and mold the particles to form a resonant tube blank.

[0081] Preferably, after the injection molding is completed...

Embodiment 3

[0086] Embodiment 3 is at TDD (Time Division Duplex, time division duplex) 2.0GHz, the manufacturing method of the resonant tube in the filter that broadband is 15MHz, as Figure 6 As shown, the method includes:

[0087] 401. Add binder poly Propylene and paraffin are mixed evenly to form a paste, wherein the mass percentages of the powder material and the binder are 60-90% and 10-40%.

[0088] 402. Use a granulator to make the paste into strips or columns under the conditions of a working temperature of 210-250° C. and a working pressure of 7-10 MPa.

[0089] 403. Using an injection molding machine under the conditions of a working temperature of 250-300° C. and a working pressure of 40-50 MPa, inject and mold the particles to form a resonant tube blank.

[0090] Preferably, after the injection molding is completed, the mold opening residence time is 3 seconds.

[0091] 404 . Vacuum sintering the resonant tube blank at a sintering temperature of 1300-1350° C. to form a sem...

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Abstract

The invention provides a resonance tube, a manufacture method of the resonance tube and a cavity filter, belonging to the technical field of the communication equipment. Different degrees of temperature compensation are provided, the production cost is reduced and the production efficiency is increased. The resonance tube is made of a powder material and the powder material comprises at least one of carbonyl iron powder and iron powder and at least one of nickel carbonyl powder and nickel powder, the mass percentage of at least one of carbonyl iron powder and iron powder in the powder material is 58-70% and the mass percentage of at least one of nickel carbonyl powder and nickel powder in the powder material is 30-42%. The resonance tube, the manufacture method of the resonance tube and the cavity filter are used in the communication devices such as a base station.

Description

technical field [0001] The invention relates to the field of communication equipment, in particular to a resonance tube, a manufacturing method thereof, and a cavity filter. Background technique [0002] The duplexer of the base station transceiver module is composed of a radio frequency cavity filter, which is used for single-channel high-power signal transmission. Wherein, the cavity filter includes components such as tuning screws, a resonant tube, and a cavity. Due to the thermal expansion characteristics of the material, the resonant frequency of the cavity filter changes with the change of temperature, so its filtering characteristics change with the change of temperature. This phenomenon is called temperature drift. Temperature drift will deteriorate the radio frequency index, resulting in a decrease in the performance of the cavity filter. [0003] At present, the temperature drift problem of the cavity filter is solved by the temperature compensation function of e...

Claims

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Application Information

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IPC IPC(8): H01P7/06H01P11/00H01P1/207B22F1/052
CPCH01L21/00H01P7/06H01P1/207H01P11/00H01P11/008B22F5/106C22C33/0278B22F2998/10B22F2003/242B22F2999/00B22F1/052B22F1/09B22F3/1007B22F2201/20B22F1/103B22F3/225C25D1/00B22F3/12B22F3/26B22F2301/35B22F2302/45C25D7/04H01P7/00
Inventor 周彦昭袁亮
Owner HUAWEI TECH CO LTD
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