Screw for fixing resonant bar, cavity filter and communication equipment

A technology of cavity filter and resonant rod, which is applied in the direction of screws, mechanical equipment, waveguide devices, etc.
CN102287437BActive Publication Date: 2013-01-16ANHUI TATFOOK M&E TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
ANHUI TATFOOK M&E TECH
Publication Date
2013-01-16

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Abstract

The invention discloses a screw for fixing a resonant bar, a filter adopting the screw and communication equipment adopting the cavity filter; the screw is provided with a bar part which is at least locally provided with a thread; one end of the bar part is a screw head; a transition area is formed between the screw head and the bar part; a circular groove is arranged around the transition area with the bar part as the center; the transition area is arranged in the groove; the depth of the groove is more than the height of the transition area; and when the resonant bar is fixed, the top surface of the groove presses the bottom of the resonant bar, so that the resonant bar is fixed. The cavity filter adopts the screw, the transition area of the screw is arranged in the groove, so that the transition area does not press the bottom surface of the resonant bar, the resonant bar can be very well fixed under the condition that the screw has equal stress, and the phenomena that the resonant bar deforms and the performance of the filter is affected due to the transition area do not exist. The communication equipment adopts the cavity filter, so that the filtering performance can be very well realized.
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Description

technical field

[0001] The invention relates to a communication device, in particular to a cavity filter and a communication device using the cavity filter. Background technique

[0002] As an important communication device, cavity filter plays an irreplaceable role in the field of radio transmission.

[0003] A cavity filter usually includes a cavity and a resonance tube, the cavity is provided with multiple cavities, and each cavity accommodates a resonance tube. In order to ensure that the cavity filter can effectively filter out noise and interference signals, the connection between the resonant tube and the cavity in the cavity filter must be tightly structured. At present, there is a through hole at the bottom of the resonant tube in the cavity filter, and then the fixing screw The resonance tube is fixed on the supporting seat of the cavity through the through hole. Such as figure 1 As shown, the fixing screw is stamped by stamping equipment, including the screw he...

Claims

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