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A coaxial filter that can improve its own high -second harmonic

A high-order harmonic and filter technology, applied in the field of communication, can solve the problems affecting the suppression performance and inconvenience of the filter

Active Publication Date: 2019-09-06
MOBILE ANTENNA TECH SHENZHEN +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

like figure 1 , set a coaxial low-pass filter with an outer conductor diameter of 10mm, the inner conductor diameter of the low-resistance section is 9.5mm, and the inner and outer conductors are filled with polytetrafluoroethylene with a dielectric constant of 2.1. According to the above formula, this Specifications The cut-off wavelength corresponding to the lowest mode of the coaxial low-pass filter, and the corresponding frequency That is to say, the low-pass filter of this specification will appear high-order harmonics near 6.6G, which will affect the suppression performance of the filter near 6.6G
[0004] In summary, the existing methods obviously have inconvenience and defects in actual use, so it is necessary to improve them

Method used

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  • A coaxial filter that can improve its own high -second harmonic
  • A coaxial filter that can improve its own high -second harmonic
  • A coaxial filter that can improve its own high -second harmonic

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] figure 2 It shows the coaxial filter that can improve its own high-order harmonics described in the preferred embodiment of the present invention, including a filter body 100 and a resonant structure 200, and the resonant structure 200 is connected to the input end of the filter body 100 , the resonant structure 200 is used to generate a resonant frequency lower than the corresponding frequency of the lowest mode harmonic formed by the filter main body 100 itself. The interference of the filter at its own high-order harmonics is filtered through the resonant frequency, thereby ensuring tha...

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Abstract

The invention provides a coaxial linear filter capable of improving higher harmonic of itself, and belongs to the technical field of communication. The filter comprises a filter body and a resonance structure, the resonance structure is connected to the input end of the filter body, and the resonance structure is used to generate a resonance frequency lower than a frequency corresponding to a lowest harmonic formed by the filter body itself. Thus, the low-pass filter can work normally in the frequency range of the higher harmonic of itself.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a coaxial filter capable of improving its own high-order harmonics. Background technique [0002] Coaxial low-pass filters are usually used in conjunction with cavity filters to suppress high-order modes generated by cavity filters. The middle part of the cylinder of the low-impedance section of the coaxial low-pass filter disclosed in the patent document with the announcement number CN202217757U and the invention name "A Coaxial Low-Pass Filter" is hollowed out, which is equivalent to the sensing part of the capacitor Larger, under the same length size, this coaxial low-pass filter has a better suppression effect on the parasitic passband and high-order modes. In the coaxial low-pass filter disclosed in the patent document whose publication number is CN102610878A and the title of invention is "A Coaxial Low-Pass Filter", two high-order Harmonic suppression cylinder final...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/212
Inventor 刘咸阳孔改花胡孟夏王斌华
Owner MOBILE ANTENNA TECH SHENZHEN