High selectivity high stopband rejection band-pass filter chip circuit

A band-pass filter, high-selectivity technology, applied in impedance networks, electrical components, multi-terminal pair networks, etc., can solve problems such as poor selectivity and insufficient suppression depth, achieve good stop-band suppression, less design difficulty, and improved resistance. effect with suppression

Inactive Publication Date: 2018-09-07
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the document "Microstrip Filters With Enhanced Stopband Based on Lumped Bisected Pi-Sections With Parasitics" of MWCL, the top journal in the field of wireless communication in 2017, and the document "CompactIntegrated Lumped Element LCP Filter" of MWCL, the top journal in the field of wireless communication in 2016, the use of centralized components is proposed To realize the idea of ​​high stopband suppression, the document "Microstrip Filters With Enhanced Stopband Based on Lumped BisectedPi-Sections With Parasitics" achieves high stopband suppression by improving the method of introducing transmission zeros into Pi-type units, but its suppression depth is insufficient and its selection Poor sex

Method used

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  • High selectivity high stopband rejection band-pass filter chip circuit
  • High selectivity high stopband rejection band-pass filter chip circuit
  • High selectivity high stopband rejection band-pass filter chip circuit

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Embodiment Construction

[0027] Such as figure 1 As shown, a band-pass filter chip circuit with high selectivity and high stop-band suppression includes a basic filter circuit, a circuit for improving selectivity and a circuit for improving stop-band rejection; the specific signal transmission method is as follows: RF microwave signals enter through the input port The basic filter circuit selects the signal in the required working frequency band through the basic filter circuit, and then realizes cross-coupling by improving the transmission path of the selective circuit, and then realizes a pair of transmission zero points to improve the selectivity of the filter, and finally the signal passes through The circuit for improving the stop-band rejection improves the stop-band rejection of the signal, and then outputs it through the output port.

[0028] The schematic diagram of the basic filter circuit is shown in figure 2 As shown, it is mainly composed of output port capacitance (C_out1 and C_out2), ...

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Abstract

The invention discloses a high selectivity high stopband rejection band-pass filter chip circuit. The circuit comprises a high stopband rejection filter circuit and an improved stopband rejection circuit, wherein the high stopband rejection filter circuit comprises a base filter circuit and an improved selectivity circuit. A signal transmission method specifically comprises the following steps that an RF microwave signal enters the base filter circuit through an input port, the base filter circuit selects a desired signal in an operating frequency, then cross-coupling is realized through a transmission path of the improved selectivity circuit, further, a pair of transmission zeros is realized so as to improve the selectivity of the filter, and finally, the stopband rejection of the signalis improved through the improved stopband rejection circuit, and then the signal is output through an output port. Compared with the prior art, the circuit is more practical and has higher rejection,and the realized filter has a smaller volume, is further integrated, and benefits system integration.

Description

technical field [0001] The invention belongs to the technical field of radio frequency wireless communication, and in particular relates to a band-pass filter chip circuit with high selectivity and high stop band suppression. Background technique [0002] With the rapid development of the wireless communication industry, especially the development of the fifth generation (5G) mobile communication technology, wireless communication electronic circuits are increasingly developing towards high performance, low cost, and high integration. In the field of wireless communication, the filter has the function of selecting useful signals and suppressing unwanted signals. For useful signals, it is hoped that the filter circuit can have good selectivity, and for unwanted signals, it is hoped that the filter circuit has such a high degree of suppression. [0003] At present, in the field of wireless communication, filters with high selectivity and high stopband suppression are mostly de...

Claims

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Application Information

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IPC IPC(8): H03H7/01
CPCH03H7/0115
Inventor 罗显虎程序张亮韩江安陈凤军夏鑫淋陈科帆成彬彬邓贤进
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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