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Temperature compensation structure for 3.5GHz frequency filter

A temperature compensation and filter technology, applied in the field of filters, can solve problems such as temperature rise, high drift of passband frequency, low drift of passband frequency, etc., and achieve the effect of enhancing the effect of temperature compensation

Active Publication Date: 2013-09-04
KAELUS COMM EQUIP SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the frequency increases and the cavity increases, insufficient compensation will occur. The specific performance is that the passband frequency drifts low as the temperature rises; on the contrary, the passband frequency drifts high.

Method used

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  • Temperature compensation structure for 3.5GHz frequency filter

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Such as figure 1 As shown, a temperature compensation structure of a 3.5GHz frequency band filter includes a filter cavity 1, a pad 2, a resonant rod 3, a cover plate 4 and a tuning screw 5, and the filter cavity 1 is cylindrical, The spacer 2 is in the shape of a disk, the spacer 2 is arranged at the bottom of the filter cavity 1, and is concentric with the filter cavity 1, the resonant rod 3 is fixed on the spacer 2, and the The tuning screw 5 is located above the resonant rod 3 and both are concentric. One end of the tuning screw 5 is fixed on the cover plate 4 through a nut.

[0017] The diameter of described filter cavity is 42mm; The height of described pad is 4mm, and diameter is 16mm; Described pad adopts Invar pad; The height of described resonance bar is 6.8mm, and diameter is The diameter of the tuning screw described in 6mm is 3mm; the tuning screw...

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Abstract

The invention relates to a temperature compensation structure for a 3.5GHz frequency filter, which comprises a filter cavity, a cushion block, a resonance rod, a cover plate and a tuning screw, wherein the filter cavity is cylindrical; the cushion block is disk-shaped, and is arranged at the bottom of the filter cavity and concentric with the filter cavity; the resonance rod is fixed on the cushion block; the tuning screw is positioned above the resonance rod, and the tuning screw and the resonance rod are concentric; and one end of the tuning screw is fixed on the cover plate through a nut. Compared with the prior art, the structure of the cushion block and the resonance rod can greatly reduce a gap on the premise of not changing the resonance frequency basically to further enhance the temperature compensation effect.

Description

technical field [0001] The invention relates to a filter, in particular to a temperature compensation structure of a 3.5GHz frequency band filter. Background technique [0002] With the continuous development of microwave technology, system operators have higher and higher requirements on the performance of microwave passive components, among which temperature drift has always been an important indicator to measure the performance of passive cavity filters. Due to the thermal expansion and contraction of the metal itself, the resonant frequency of the filter itself changes in low temperature and high temperature environments, thereby changing the passband range and affecting the insertion loss, return loss, out-of-band suppression and other indicators. The greater the temperature drift, the more difficult it is to achieve other indicators. Therefore, how to minimize the temperature drift has become a key consideration in filter design. [0003] The commonly used temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/30H01P1/207
Inventor 杜晓亮
Owner KAELUS COMM EQUIP SHANGHAI