A miniaturized inductively coupled tunable bandpass filter and its preparation method

An inductive coupling and filter technology, applied in the field of filters, can solve problems such as poor batch consistency, complicated manufacturing process, and high cost, and achieve the effects of low cost, simple manufacturing process, and extended service life

Active Publication Date: 2022-07-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a miniaturized inductively coupled adjustable bandpass filter, which solves the problems of high technical cost, complex manufacturing process and poor batch consistency in the case of miniaturization.

Method used

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  • A miniaturized inductively coupled tunable bandpass filter and its preparation method
  • A miniaturized inductively coupled tunable bandpass filter and its preparation method
  • A miniaturized inductively coupled tunable bandpass filter and its preparation method

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preparation example Construction

[0067] The preparation process of the filter of the present invention is as follows Figure 9 As shown, the specific preparation method is as follows:

[0068] Ingredients: Select the ceramic raw material formula to configure the ceramic material;

[0069] Casting: The prepared ceramic material is made into a casting slurry, and the ceramic substrate is cast out;

[0070] Hole punching and hole filling: Punch holes on part of the ceramic substrate to obtain conductive post-replacement holes 16 and inductance connection holes 21, and then fill the holes with metal paste;

[0071] Conductor printing: Conduct conductor printing with the filled ceramic substrate to prepare a metal conductive tape for forming a spiral inductor. The same spiral inductor and different ceramic substrate layers are connected through the filled inductor connection holes 21; Conduct conductor printing on the ceramic substrate of the hole 16 to form a metal layer of the ground plate that is not in conta...

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Abstract

The invention discloses a miniaturized inductive coupling type adjustable band-pass filter, which belongs to the technical field of filters. The structure mainly includes the shell, the input pole, the output pole, the ground pole, the three-layer grounding plate, the inductance between the different layers of the grounding plate and the capacitance on the surface of the casing. The low-temperature co-fired ceramic technology is used to sinter the grounding plate and the inductor into the In the substrate, the capacitor is mounted on the upper surface of the casing. The invention has simple structure, low cost, and is prepared by using low-temperature co-fired ceramic technology, with small volume and good batch consistency; at the same time, the three-layer grounding plate separates different inductances and capacitors, avoids parasitics and resonance caused by unnecessary coupling, and improves the Filter accuracy and figure of merit.

Description

technical field [0001] The invention belongs to the technical field of filters, in particular to a miniaturized inductive coupling type adjustable bandpass filter. Background technique [0002] In recent years, with the rapid development of miniaturization of mobile communication, satellite communication and defense electronic systems, high performance, low cost and miniaturization have become the development direction of the current microwave / radio frequency field. Both performance and cost put forward higher requirements. The communication countermeasure system needs to realize the signal processing in the complex information environment, and needs the filter to realize the signal selection. Filters are mainly used to separate signals and suppress interference, which is the most extensive and most basic application of filters. In this application, the ESC filter can smoothly pass the signal of the desired frequency and suppress the unwanted frequency. The current commun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H7/01H03H3/00
CPCH03H7/0161H03H3/00
Inventor 石玉徐瑞豪徐自强尉旭波钟慧武凯璇毛云山钟声越刘文斌
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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