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High rejection band-stop filter and diplexer using such filters

A technology of band-stop filter and filter, which is applied to waveguide devices, electrical components, circuits, etc., and can solve problems such as not being able to obtain band-stop filters

Inactive Publication Date: 2013-01-02
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, if figure 2 and image 3 The described implementations of several resonators do not enable easy-to-use band-stop filters

Method used

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  • High rejection band-stop filter and diplexer using such filters
  • High rejection band-stop filter and diplexer using such filters
  • High rejection band-stop filter and diplexer using such filters

Examples

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Embodiment Construction

[0030] Figure 4In , a first embodiment of a high rejection bandstop filter according to the present invention is shown. Figure 4 The left diagrammatically shows the structure of the filter, while Figure 4 The simulated transmission and reflection curves for this filter are provided on the right.

[0031] As shown on the left, on a substrate 30 having a conductive layer, four resonators 31a, 31b, 31c, and 31d are realized by being cascaded together in parallel. as for figure 1 As described in Example C, each resonator 31a, 31b, 31c and 31d is formed by a stub of length λ / 4 etched on a transmission line.

[0032] exist Figure 4 In the embodiment, the resonator 31a is connected in series with the resonator 31b in the same direction through a coupling stub 32a, and the length of the coupling stub 32a determines the coupling phase. Similarly, the resonator 31b is connected in series with the resonator 31c through the coupling line 32b, and the resonator 31c is connected wi...

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Abstract

The present invention relates to a high rejection stop band filter and a diplexer using such filters. The stop band filter comprises on a substrate (30) with a ground plane, a transmission line extending between an input (port 1) and an output (port 2) and comprises several resonators (31 a, 31 b, 31 c, 31 d) formed of ''stubs'' in printed open circuit embedded into the transmission line, the resonators being positioned in parallel together and interconnected (32a, 32b, 32c) in series in the same direction or head to tail. The filters are particularly useful in mobile devices operating in two concurrent frequency bands.

Description

technical field [0001] The present invention relates to a high rejection band-stop filter, more particularly to a band-stop filter in printing technology. The invention also relates to duplexers using such filters. Background technique [0002] In the context of high bitrate multimedia networks in the home environment, there is an increasing demand to be able to have digital content on various available multimedia devices such as televisions, computers, game consoles, tablets or smartphones. Therefore, it seems necessary for these devices to have parallel dual-band wireless access capable of simultaneously executing data and multimedia applications. [0003] Currently, some products provide concurrent wireless access (WiFi) in the 2.4GHz and 5GHz bands. In this case, the 2.4GHz band is allocated to the transmission of standard data or video, while the 5GHz band is allocated to the transmission of high-definition streams or high-resolution games. [0004] However, the 2.4G...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H01P1/203
CPCH01P1/20336H01P1/203H01P1/213H01P1/2135
Inventor J-L.罗伯特D.罗西尼唐A.洛奇尔P.米娜德J-Y.莱瑙尔
Owner THOMSON LICENSING SA