Novel medium cavity filter with cavity

A dielectric cavity and filter technology, applied in the field of reciprocal microwave devices, achieves the effects of good temperature characteristics, high reliability and low loss

Active Publication Date: 2013-03-13
江苏灿勤科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional cavity filters or dielectric cavity filters use aluminum materials such as AL6061 as the material of the cavity, which makes the realization of the dielectric cavity filter, due to the fact that aluminum is used as a metal part and a dielectric material There are serious reliability problems when soldering resonators

Method used

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  • Novel medium cavity filter with cavity
  • Novel medium cavity filter with cavity
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Embodiment 1~3

[0050]Embodiments 1 to 3: A novel cavity dielectric cavity filter, comprising a cavity 1 and a dielectric resonator 2, the dielectric resonator is a cylinder 4 with a through hole 3; the dielectric resonator 2 consists of the following The component composition of mass percentage content is as shown in table 1:

[0051] Table 1

[0052]

[0053] One end of the dielectric resonator 2 is plated with a silver layer 5, and the other end of the dielectric resonator 2 is welded in the cavity 1;

[0054] The cavity 1 is composed of the following components in mass percentage as shown in Table 2:

[0055] Aluminum oxide calcium carbonate Lanthanum oxide Samarium oxide Example 1 95% 3% 1.5% 0.5% Example 2 95.5% 3% 1.1 % 0.4% Example 3 96% 2.5% 1 % 0.5%

[0056] The dielectric constant of the cavity 1 is 9.5.

[0057] The above-mentioned dielectric resonator 2 is composed of the following components in mass percentag...

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Abstract

The invention discloses a novel medium cavity filter with a cavity. The novel medium cavity filter comprises the cavity and medium resonators, wherein each medium resonator is a cylinder with a through hole and is prepared from the following components according to mass percent: 29%-32% of calcium carbonate with purity of 97.5%, 9%-11% of aluminum oxide with purity of 97.5%, 21%-25% of neodymium oxide with purity of 99.5%, and 35%-38% of titanium dioxide with purity of 99.6%; a silver layer is coated at one end of each medium resonator, and the other end of the medium resonator is welded inside the cavity; the cavity is prepared from the following components according to mass percent: 95%-96% of aluminum oxide, 2%-3% of calcium carbonate, 0.8%-1.5% of lanthanum oxide, and 0.2%-0.5% of samarium oxide; and the dielectric constant of the cavity is 9.5. The medium cavity filter disclosed by the invention is high in Q value, small in size and adjustable in temperature coefficient, and can ensure high reliability of a product structure and good consistency of thermal expansion coefficients of the cavity and the medium resonators.

Description

technical field [0001] The invention relates to a novel cavity dielectric cavity filter, belonging to the field of reciprocal microwave devices. Background technique [0002] As a frequency selection device, dielectric filters are widely used in the field of communication, especially in the field of radio frequency communication. In the base station where the communication system completes signal transmission and reception, the filter is used to select the communication signal and filter out the clutter or interference signal outside the frequency of the communication signal. [0003] At present, in mobile communication base station systems, cavity filters are commonly used to select frequencies for signals transmitted and received by antennas. Traditional cavity filters or dielectric cavity filters use aluminum materials such as AL6061 as the material of the cavity, which makes the realization of the dielectric cavity filter, due to the fact that aluminum is used as a meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/208H01P7/10
Inventor 袁清朱田中顾雪兴许君其
Owner 江苏灿勤科技股份有限公司
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