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Lumped parameter minitype LTCC high-pass filter

A high-pass filter, lumped parameter technology, applied in the field of microelectronics, can solve the problem of overall device performance deterioration, and achieve excellent microwave performance, low insertion loss, and good consistency.

Inactive Publication Date: 2014-08-13
NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the three-dimensional inductors or capacitors based on LTCC technology are not ideal components, as the frequency increases, the effects of self-resonance and coupling between components also rapidly deteriorate the overall performance of the device, so professional design is required to achieve ideal performance

Method used

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Embodiment Construction

[0011] Such as figure 1 As shown, the miniature LTCC high-pass filter includes input port IN, output port OUT, A ground port GND1, and B ground port GND2, where A ground port GND1 and B ground port GND2 are connected through a metal plate, and the filter also includes A capacitor C1, B capacitor C2, C capacitor C3, A parasitic capacitor C4, B parasitic capacitor C5, A inductor L1, B inductor L2, C inductor L3 and D inductor L4. The filter is realized based on low-temperature co-fired ceramic technology. The selected ceramic tape is DuPont 951. The dielectric constant of the ceramic is 7.8, the loss tangent is 0.002, and the metallization paste is silver paste. The thickness of the raw porcelain tape is 50um per layer, and the thickness after co-firing is 42um, so the thickness of the porcelain tape selected in the design is 42um per layer. Metallization thickness is 8um per layer.

[0012] The A inductor L1, the B inductor L2, the C inductor L3, the D inductor L4, the A capa...

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Abstract

The invention discloses a lumped parameter minitype LTCC high-pass filter. The lumped parameter minitype LTCC high-pass filter structurally comprises an input port (IN), an output port (OUT), an A-location port (GND1), a B-location port (GND2), an inductor A (L1), a capacitor A (C1), an inductor B (L2), a capacitor B (C2), an inductor C (L3), a capacitor C (C3), an inductor D (L4), a stray capacitor A (C4) and a stray capacitor B (C5). The high-pass filter is achieved through a multi-layer low temperature co-fired ceramic technology, the dielectric constant of ceramics is 7.8, and the thickness of each layer of ceramics is 42 microns. Metallization layers are made of silver materials, and the thickness of each metallization layer is eight microns. The high-pass filter has the advantages of being small in size, light, low in insertion loss, small in voltage standing wave ratio, steep in sideband, low in cost, high in reliability and good in volume production consistency, and can be widely applied to the technical field of modern wireless communication.

Description

technical field [0001] The invention relates to a lumped parameter miniature LTCC high-pass filter, which belongs to the technical field of microelectronics. Background technique [0002] The radio frequency filter is a key component in the microwave circuit module. In order to suppress the low-frequency spurs in the circuit, a miniaturized high-pass filter is generally required. Due to the development of wireless communication systems towards broadband, high performance, and miniaturization, the requirements for microwave filters are getting higher and higher. Not only are microwave filters required to have small insertion loss in the passband and good standing waves, but also require suppression in the stopband. higher. In recent years, the miniaturization of passive devices has become a research hotspot of scholars from various countries, and LTCC technology is an effective way to realize the miniaturization of passive devices. LTCC filters are not only small in size, l...

Claims

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Application Information

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IPC IPC(8): H03H5/00
Inventor 徐利郑琨
Owner NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD