Super-miniature LTCC low-pass filter

A low-pass filter, ultra-miniature technology, applied in impedance networks, electrical components, multi-terminal-pair networks, etc., can solve the problems of high energy consumption and large size, and achieve the effect of small size, good electrical performance and good performance

Pending Publication Date: 2019-01-11
SHENZHEN MICROGATE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the above-mentioned 4G mobile terminals in the prior art, a low-pass filter is required to ensure the high-frequency suppression of the mobile terminal’s transmitting end. The low-pass filter of the traditional technology is a discrete co

Method used

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Examples

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Embodiment Construction

[0040] This embodiment is a preferred implementation mode of the present invention, and other principles and basic structures that are the same or similar to this embodiment are within the protection scope of the present invention.

[0041] In the LTCC technology process, the size of the capacitor can be adjusted by adjusting the length and width of each capacitor substrate. The parallel plate capacitance formula is:

[0042]

[0043] Where A is the area of ​​the electrode plate in square microns; ε r is the relative dielectric constant of the ceramic material, d is the distance between two electrode plates, the unit is micron, n is the number of electrode plates, and pF is the capacitance unit picofarad.

[0044] The inductance adopts the form of coil inductance, and the inductance is adjusted by adjusting the layer spacing and the coil area. The formula of the coil inductance is:

[0045]

[0046] where N is the number of turns of the coil, h is the height of the coil...

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Abstract

The present invention discloses a super-miniature LTCC (Low Temperature Co-fired Ceramic) low-pass filter. The super-miniature LTCC low-pass filter employs a stacked structure to achieve the minimum Balun structure in the industry. The super-miniature LTCC low-pass filter employs a LTCC process to put a circuit into a ceramic body so as to meet a more precise circuit wiring requirement. The internal circuits of the LTCC low-pass filter are distributed in a stacked mode, the size is small, and the electrical performance is good. The LTCC low-pass filter is good in performance, is small than 0.5dB in the in-band insertion loss, is 2.025GHz in inhibition frequency and is 25dB in the out-of-band rejection.

Description

technical field [0001] The invention discloses a low-pass filter, especially an ultra-miniature LTCC low-pass filter, which adopts low-temperature co-fired ceramic technology, is integrated in a microwave ceramic body, realizes its miniaturization, and can be used in the circuit system of LTE 4G communication mobile equipment middle. Background technique [0002] With the rapid development of mobile communication technology, 4G-LTE has appeared at present, and while it is convenient to use, many frequency bands have been added. There are more and more radio frequency components used in 4G-LTE mobile terminals, which put forward higher and higher requirements for transmission speed and reliability. Low-temperature ceramic co-firing (LTCC) technology integrates radio frequency components into ceramic media, which not only reduces product size, but also has high reliability. Microwave low-loss dielectric ceramics are used to reduce the loss of radio frequency components and r...

Claims

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Application Information

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IPC IPC(8): H03H7/01
CPCH03H7/0115
Inventor 梁启新付迎华陈琳玲马龙齐治
Owner SHENZHEN MICROGATE TECH
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