TD-LTE (time division-long term evolution) radio-frequency signal reception front-end filtering device

A receiving front-end and filter processing technology, which is applied to waveguide devices, electrical components, circuits, etc., can solve the problems of cost increase, waste, and expensive ceramic dielectric materials, and achieve the effect of ensuring consistency, low cost, and small size

Inactive Publication Date: 2012-10-24
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Because the dielectric constant of the FR-4 dielectric material is unstable, the dielectric constant of different batches of materials is quite different, and the microstrip filter is particularly sensitive to the dielectric constant of the substrate dielectric material, so the PCB designed and processed in the project Often due to changes in the dielectric constant of the substrate, the microstrip filter fails and is discarded, and the entire PCB has to be reprocessed
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  • TD-LTE (time division-long term evolution) radio-frequency signal reception front-end filtering device
  • TD-LTE (time division-long term evolution) radio-frequency signal reception front-end filtering device
  • TD-LTE (time division-long term evolution) radio-frequency signal reception front-end filtering device

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Embodiment Construction

[0012] A TD-LTE radio frequency signal receiving front-end filter processing device, including a fan-shaped microstrip filter 10 and a stripline interdigitated bandpass filter 20 respectively fixed on a PCB circuit board 40, and a metallized hole is passed between the two connected in series, the substrate layers of both are made of ceramic dielectric materials, such as figure 1 shown. Between the fan-shaped microstrip filter 10 and the stripline interdigitated bandpass filter 20 are two independent filters separated by a V-shaped groove, connected together during processing, and can be separated during installation and use to separate into two independent filters. device. The PCB circuit board 40 is a generally processed PCB board, and its material can be FR-4 or other selected arbitrary media. The fan-shaped microstrip filter 10 and the stripline interdigitated bandpass filter 20 can pass through the mounting holes at the four corners of the filter. 30, fixed on the smooth...

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Abstract

The invention relates to a TD-LTE (time division-long term evolution) radio-frequency signal reception front-end filtering device. The TD-LTE radio-frequency signal reception front-end filtering device comprises a fan-shaped microstrip filter and a strip line interdigital band-pass filter, which are connected in series through a plated hole and adopt ceramic medium materials as substrate materials, wherein the fan-shaped microstrip filter and a PCB (printed circuit board) are adopted as mounting plates, so that lower cost is guaranteed while performance indexes of a radio-frequency signal reception front-end filter are met; and the fan-shaped microstrip filter and the strip line interdigital band-pass filter are independently mounted on the PCB, are small in volume and can be flexibly assembled in different radio-frequency processing modules. In addition, the two filters are made of high-performance ceramic medium materials, so that the process uniformity of the filter and the reliability of the performance indexes of the filter are guaranteed.

Description

technical field [0001] The invention relates to the field of radio frequency testing, in particular to a TD-LTE radio frequency signal receiving front-end filter processing device. Background technique [0002] In the field of wireless mobile communication testing, TD-LTE terminal radio frequency conformance testing is one of the key testing items for TD-LTE terminals. The frequency allocation and terminal comprehensive testing of the new generation of broadband wireless mobile communication are specified in detail in the standard 3GPP. The front-end processing of the RF receiver puts forward special requirements, and the design of the front-end image frequency suppression filter is one of the key technologies, requiring low in-band insertion loss, small in-band ripple, and high out-of-band rejection. [0003] The image frequency suppression filter of the RF receiving front end is commonly used as an LC filter in the previous spectrum analysis instrument, but the LC filter ...

Claims

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Application Information

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IPC IPC(8): H01P1/20H01P1/203
Inventor 赵润年
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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