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Bandpass filter circuit, multi-layer structure and method for realizing same

A band-pass filter, multi-layer structure technology, applied in circuits, waveguide devices, electrical components, etc., can solve the problems of difficult control of transmission zero point and difficult control of mutual coupling mechanism.

Inactive Publication Date: 2010-02-17
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The layout of this structure is simplified, and the mutual coupling mechanism between resonators is not easy to control, so the position of the transmission zero point is also difficult to control

Method used

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  • Bandpass filter circuit, multi-layer structure and method for realizing same
  • Bandpass filter circuit, multi-layer structure and method for realizing same
  • Bandpass filter circuit, multi-layer structure and method for realizing same

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Embodiment Construction

[0024] Considering the overall characteristics of the wireless communication system, in order to avoid the occurrence of noise interference or harmonic distortion in the transmission channel, a radio frequency bandpass filter device with high repulsion is usually required.

[0025] figure 1 A circuit block diagram of the bandpass filter of the present invention is shown. The bandpass filter 10 mainly includes a first resonator 11 , a second resonator 12 , a third resonator 13 , a first coupling device 14 , a second coupling device 15 , a feedback capacitor device 16 and a ground Inductive device 17 . The first coupling device 14 is provided between the first resonator 11 and the second resonator 12 , and the second coupling device 15 is provided between the second resonator 12 and the third resonator 13 . One end of the first, second and third resonators 11 , 12 and 13 is connected to a first node a, and the other end is connected to a second node b. The feedback capacitor ...

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Abstract

The invention discloses a bandpass filter circuit, a multi-layer structure and a method for realizing the same. The bandpass filter circuit comprises a plurality of resonators, a feedback capacitancedevice and a grounding inductance device, wherein in the resonators, first end points are connected with first nodes, and second end points are connected with second nodes; the feedback capacitance device is arranged in a feedback circuit between the first nodes and the second nodes; and one end point of the grounding inductance device is connected with the second nodes, and the other end point isgrounded. In the technical scheme, the resonator comprises a capacitance device and an inductance device.

Description

technical field [0001] The present invention relates to a bandpass filter circuit and a multi-layer structure capable of increasing its rejection, and a related method for increasing the rejection of a bandpass filter. Background technique [0002] As we all know, RF passive components play a very important role in today's communication systems, whether they are basic inductors, capacitors, resistors, or antennas, balanced-to-unbalanced converters and other devices. Indispensable in wireless communication systems. Among them, the RF bandpass filter is often the most critical device in the system. The main function of the radio frequency band-pass filter is to select the signal of the desired frequency band in the frequency spectrum, and in addition to provide appropriate attenuation (attenuation) for the interference source signal outside the passband. In a system, the location of the filter is usually after the antenna and before the LNA. Therefore, a good RF bandpass fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
Inventor 晋国强魏昌琳蔡承桦陈韦廷张立奇陈昌升
Owner IND TECH RES INST