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Filtering tuning device

A filter tuning and cover adjustment technology, which is applied in the field of radio frequency communication, can solve problems such as difficult to meet the index requirements, and achieve the effect of avoiding glitches and impedance discontinuities, wide adjustment range, and meeting index requirements

Inactive Publication Date: 2021-04-06
SHENZHEN GRENTECH RF COMM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitations of miniaturization, frequency adjustable range, intermodulation and power, the coaxial cavity of this structure is limited in miniaturization, high intermodulation and high power communication systems, and it is often difficult to meet the requirements of practical engineering. index requirements

Method used

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  • Filtering tuning device
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Examples

Experimental program
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Embodiment Construction

[0029] see Figure 1 to Figure 3 , the present embodiment provides a filter tuning device, including a metal cavity 10 with one end open, an outer cover 20 , a resonant column 30 installed in the metal cavity 10 , an adjusting cover 40 and an adjusting screw 50 . The adjustment cover plate 40 and the outer cover plate 20 are sequentially installed on the open end of the metal cavity 10 . One end of the resonant column 30 close to the adjustment cover 40 is formed with a resonant disk 31. There is a space between the resonant disk 31 and the adjustment cover 40, and the two form a capacitive coupling. This structure can reduce the resonance frequency and realize a miniaturized design, and The coupling area between the resonance plate 31 and the adjustment cover plate 40 is large, so that the adjustment range of the resonance frequency is larger than that of the traditional coaxial cavity filter. The adjusting screw 50 is threadedly mounted on the outer cover 20 for adjusting t...

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Abstract

The invention provides a filtering tuning device. The device comprises a metal cavity with an opening at one end, an outer cover plate arranged at the opening end of the metal cavity, a resonance column arranged in the metal cavity, an adjusting cover plate and an adjusting screw rod, wherein the adjusting cover plate is mounted between the opening end of the metal cavity and the outer cover plate; a resonance disc is formed at one end, close to the adjusting cover plate, of the resonance column, a space is formed between the resonance disc and the adjusting cover plate, and capacitive coupling is formed between the resonance disc and the adjusting cover plate; the adjusting screw rod is installed on the outer cover plate in a threaded mode and used for adjusting the distance between the adjusting cover plate and the resonance disc so as to adjust the resonance frequency. According to the device, the adjustable range of the resonant frequency is large, the power tolerance is high, and intermodulation of the metal cavity is high.

Description

【Technical field】 [0001] The invention relates to the field of radio frequency communication, in particular to a filter tuning device. 【Background technique】 [0002] With the rapid development of communication technology, a large number of communication devices are connected, the spectrum resources are becoming increasingly tight, and the electromagnetic frequencies of each system are getting denser. Congestion or interference problems inevitably occur, which has become a major challenge for the development of communication systems. In order to ensure the normal operation of the system, it is necessary to filter out the interference signal. As an essential component of the communication system, the filter has been widely used in the communication field. Metal cavity filters are widely used in modern communication systems because of their high unloaded Q value, low loss, high power tolerance, and long parasitic passband. [0003] Typical metal cavity filters are mostly coax...

Claims

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Application Information

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IPC IPC(8): H01P1/207H01P7/06
CPCH01P1/207H01P7/06
Inventor 李贵强张登高桂平黄瑜华邓启华黄永红付文银李东俞吴集旺
Owner SHENZHEN GRENTECH RF COMM LTD
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