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Frequency down converter and isolative cover thereof

A technology of downconverter and isolation cover, which is applied in the modulation conversion, electrical components, modulation transfer and other directions of semiconductor devices with at least two electrodes, which can solve dimensional tolerances, affect the filtering effect of radio frequency band-pass filters, and manufacture precision dimensional tolerances and other problems to achieve the effect of correcting dimensional tolerances

Active Publication Date: 2009-10-21
WISTRON NEWEB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the limited precision of the printed circuit manufacturing process, the printed circuit coupling line of the RF bandpass filter used in the frequency reduction circuit is prone to dimensional tolerances, so it is difficult to accurately control the filtering effect of the filter
At the same time, a cavity resonance effect will also occur between the RF bandpass filter and the cavity of the isolation cover (for the cavity resonance effect, please refer to IEEE, Transactions on microwave theory and techniques, VOL.48, NO.8, August 2000) , if the manufacturing accuracy of the isolation cover also has dimensional tolerances, the cavity resonance effect will affect the filtering effect of the RF bandpass filter

Method used

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  • Frequency down converter and isolative cover thereof
  • Frequency down converter and isolative cover thereof
  • Frequency down converter and isolative cover thereof

Examples

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no. 1 example

[0064] refer to Figure 2a , which shows the down-converter 2 according to the first embodiment of the present invention, which includes a module frame 30 , a down-frequency circuit 200 and an isolation cover 100 . The frequency down circuit 200 is disposed in the module frame 30 . The isolation cover 100 is disposed on the frequency down circuit 200 , and the modulation mechanism 110 is disposed on the isolation cover 100 . collocation reference Figure 2b , the isolation cover 100 is provided with one or more cavities, and the modulation mechanism 110 may be required (for example, when the radio frequency bandpass filter filters out the relative power value at 17.8GHz, it needs to reach the relative power of -25db or lower value) is set in the cavity above the RF bandpass filter 214 to be adjusted. By adjusting the modulating mechanism 110, the dimensions of the cavities 120 can be adjusted to adjust the filtering effect of the radio frequency bandpass filter.

[0065] T...

no. 2 example

[0072] The difference between the second embodiment of the present invention and the first embodiment lies in the design of the modulation mechanism. refer to Figure 5a , which shows an exploded perspective view of the modulation mechanism 130 of the second embodiment. The modulation mechanism 130 includes a rotation modulation component 131 , a fixed component 132 , a translation modulation component 133 and a shielding component 135 . The rotation modulation component 131 includes an external thread portion 1311 and an internal thread portion 1312 . The rotation modulating component 131 utilizes the external thread portion 1311 to be screwed to the fixing component 132 . The fixing assembly 132 is fixed on the casing 122 of the isolation cover by bolts 1321 . The translation modulation component 133 includes a threaded portion 1331 and an abutting portion 1332 . The translation modulation component 133 utilizes the threaded portion 1331 to be threaded to the internal th...

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Abstract

A frequency reducer includes a module frame, a frequency reduction circuit and an isolation cover. The down-frequency circuit is arranged in the frame seat of the module. The isolation cover is arranged above the down-frequency circuit, and the isolation cover includes a cavity and a modulation mechanism. Wherein, the size of the cavity can be adjusted by the modulating mechanism.

Description

technical field [0001] The invention relates to a frequency reducer, in particular to a frequency reducer capable of adjusting filtering effects. Background technique [0002] refer to Figure 1a , which shows a conventional down-converter 1 , which includes a module frame 30 , a down-frequency circuit 200 and an isolation cover 10 . The frequency down circuit 200 is disposed in the module frame 30 . The isolation cover 10 is disposed on the frequency down circuit 200 . [0003] refer to Figure 1b , which shows the detailed structure of the frequency down circuit 200. The frequency down circuit 200 includes a radio frequency circuit 250 and an intermediate frequency signal circuit 260 . The radio frequency circuit 250 is coupled to the intermediate frequency signal circuit 260 . The radio frequency circuit 250 can receive multiple wireless communication signals (for example, vertically polarized signals and horizontally polarized signals in the same frequency band), do...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03D7/12H03D7/00
Inventor 石皇城李正男钟宗颖林宏源陈勇钦
Owner WISTRON NEWEB
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