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270-678MHz frequency hopping filter

A filter and frequency hopping technology, which is applied in the field of 270-678MHz frequency hopping filters, can solve the problems that the size and power of frequency hopping filters are difficult to balance, the service life of frequency hopping filters is not long, and low loss and high suppression are difficult to balance. , to achieve the effect of improving out-of-band suppression, sacrificing space for multiple insertion losses, and reducing the risk of failure

Pending Publication Date: 2020-11-24
武汉博畅通信设备有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) It is difficult to balance low loss and high suppression;
[0004] (2) At present, most of the frequency bands are implemented by two-stage filters, which are large in size, making it difficult to balance the size and power of the frequency hopping filter;
[0005] (3) Since the existing frequency hopping filter circuit board is placed in a sealed container, its heat dissipation effect is not good, which easily leads to the problem that the service life of the frequency hopping filter is not long

Method used

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  • 270-678MHz frequency hopping filter
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  • 270-678MHz frequency hopping filter

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Embodiment Construction

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0039] Such as figure 1 As shown, a 270-678MHz frequency hopping filter of the present invention includes a cavity 1 .

[0040] The cavity 1 is composed of front and rear cover plates and left and right side plates, which can adopt the prior art and will not be repeated here. In this embodiment, the cavity 1 contains N resonant capacitors and N PIN diodes; preferably, all PIN diodes use tube cores, which can reduce the junction capacitance of the ...

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Abstract

The invention relates to a 270-678MHz frequency hopping filter, a cathode of a PIN diode is welded to a mounting station, and the cathode of the PIN diode directly dissipates heat at the mounting station of a metal structure, so that the heat dissipation capability of the PIN diode can be remarkably improved, and the power capacity of the frequency hopping filter is improved; a negative high-voltage cut-off mode is provided, so that a technician can quickly and accurately realize connection between the PIN diode and a driving circuit of the PIN diode during welding, the conduction rate of thePIN diode is improved, and the damage rate of the PIN diode is reduced; and a low-pass filter is arranged to filter second, third and fourth harmonics of a pass band of 270-678MHz, so that the harmonic suppression capability of the frequency hopping filter reaches -65dB.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a 270-678MHz frequency hopping filter. Background technique [0002] The high-power frequency-hopping filter is generally used at the output port of the transmitter power amplifier. It is a variable-frequency band-pass filter that needs to have the properties of low loss, high rejection, and fast pass-band switching. Its high selectivity to frequency is used to filter out the useless clutter generated by the RF front-end, and it has strong suppression to transmitter signals of other frequencies, which significantly improves the anti-interference ability of the system. However, the current 270-678MHz high-power frequency hopping filter itself has the following disadvantages: [0003] (1) It is difficult to balance low loss and high suppression; [0004] (2) At present, most of the frequency bands are implemented by two-stage filters, which are large in size, makin...

Claims

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Application Information

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IPC IPC(8): H03H9/48H03H9/24H03H11/04
CPCH03H9/48H03H9/24H03H11/04
Inventor 朱耀镇蔡楚才
Owner 武汉博畅通信设备有限责任公司
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