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Broadband receiver, anti-interference filter circuit of broadband receiver and implementation method of anti-interference filter circuit

A wideband receiver and filter circuit technology, applied in the field of mobile communications

Active Publication Date: 2014-01-29
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a broadband receiver anti-jamming filter circuit and implementation method and a broadband receiver, which can effectively solve the anti-jamming problem of the existing broadband receiver

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  • Broadband receiver, anti-interference filter circuit of broadband receiver and implementation method of anti-interference filter circuit
  • Broadband receiver, anti-interference filter circuit of broadband receiver and implementation method of anti-interference filter circuit
  • Broadband receiver, anti-interference filter circuit of broadband receiver and implementation method of anti-interference filter circuit

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Embodiment Construction

[0047] Generally, the anti-aliasing filter of the receiver is implemented by a surface acoustic filter or a discrete capacitor and inductor. The former has the advantages of high suppression and steep transition zone, but the disadvantage is that the insertion loss is large and the bandwidth is generally narrow; the latter has the advantage that the bandwidth can be designed very wide and the insertion loss is small, but the disadvantage is that the suppression is low and the transition Belt is very slow.

[0048] In view of the above-mentioned problems existing in the prior art, this embodiment provides a method for implementing an anti-aliasing filter for a wideband receiver, including:

[0049] Anti-aliasing is achieved by using broadband filter circuits (which can include notch circuits) and narrowband filter circuits, and can be switched to different application scenarios by using radio frequency switches.

[0050] Further, the broadband filter circuit can be realized by...

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Abstract

The invention discloses a broadband receiver, an anti-interference filter circuit of the broadband receiver and an implementation method of the anti-interference filter circuit. The anti-interference filter circuit comprises a first switch, a broadband filter circuit and a narrowband filter circuit. The first switch is used for selecting the broadband filter circuit or the narrowband filter circuit. The broadband filter circuit is used for receiving of broadband signals. The narrowband filter circuit is used for restraining of interference signals after frequency shifting. By the anti-interference filter circuit, the problem about interference resistance of existing broadband receivers is effectively solved.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a wideband receiver anti-jamming filter circuit and its realization method and the wideband receiver. Background technique [0002] With the development of mobile communication technology and the progress of radio frequency device technology, the receiving bandwidth of the base station can be designed to 60M or even higher. Because different operators occupy their own spectrum resources, in order to save costs, they often need to share base stations. In this case, the demand for broadband receivers is even stronger. [0003] The traditional IF anti-aliasing circuit of the receiver uses a surface acoustic filter (SAW), which has a narrow bandwidth. In the implementation process of a wideband receiver, discrete capacitors and inductors are generally used to implement the filter. However, the suppression degree of this filter is low. In order to meet the overall anti-a...

Claims

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Application Information

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IPC IPC(8): H04B1/10H04B1/12
Inventor 陈豪
Owner ZTE CORP