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Band-pass filter

A technology of band-pass filters and resonators, which is applied to waveguide devices, resonators, circuits, etc., and can solve the problem of easy degradation of filter characteristics

Pending Publication Date: 2022-03-18
THE FUJIKURA CABLE WORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In this way, when the filter 2010 has the first pad, the second pad, the first via hole, and the second via hole, since the first pad and the first via hole are connected to the second pad and the second via hole, The two vias are easy to couple, so the filter characteristics are easy to deteriorate

Method used

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Examples

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no. 1 approach 〕

[0030] refer to Figure 1 ~ Figure 3 The filter 10 as a bandpass filter according to the first embodiment of the present invention will be described. In addition, refer to figure 2 The mounting substrate 20 on which the filter 10 is mounted will be described. figure 1 is a perspective view of filter 10. figure 2 is a cross-sectional view of the filter 10 . also, figure 2 A cross section along the central axis of the lines 151 and 152 included in the filter 10 is shown. in addition, figure 2 The filter 10 is shown in a state mounted on a mounting substrate 20 . image 3 It is a plan view of the resonators 141 to 146 and the lines 151 and 152 included in the filter 10 . In addition, in image 3 In , illustration of the substrate 112 and the ground conductor layer 13 included in the filter 10 is omitted.

[0031] In addition, in Figure 1 ~ Figure 3 Among them, the main surfaces of the substrate 111 and the substrate 112 are parallel to the xy plane, and the axis of...

no. 1 example and no. 2 example

[0108] In the filter 10 according to the first embodiment, the structure in which the via holes 161 and 162 and the anti-pad 121 and the anti-pad 122 formed on the ground conductor layer 12 are omitted is taken as a first example. The filter 10 according to the embodiment is a second example. In addition, the comparative examples with respect to each of 1st Example and 2nd Example are made into 1st comparative example and 2nd comparative example, respectively. The first comparative example is in Figure 5 In the shown filter 1010 , the via holes 1161 and 1162 and the anti-pad 1121 and the anti-pad 1122 formed on one ground conductor layer are omitted. The second comparative example is Figure 5 Filter 1010 is shown.

[0109] In the case of comparing the first comparative example and the second comparative example with the first embodiment and the second embodiment, the substrate 1111, the anti-pad 1121, the anti-pad 1122, the pad 1123, the pad 1124, the resonator 1141-1146...

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Abstract

The invention relates to a band-pass filter. The purpose of the present invention is to reduce deterioration in filter characteristics in a band-pass filter of the type referred to as a stripline filter or a microstrip filter. A band-pass filter (filter 10) is provided with a ground conductor layer (12), a plurality of resonators (141-146) arranged in a layer separated from the ground conductor layer (12), a first line (line 151) connected to the resonator (141) of the first stage, and a second line (line 152) connected to the resonator (146) of the last stage. The direction in which a first line (line 151) is drawn out from the first-stage resonator (141) and the direction in which a second line (line 152) is drawn out from the last-stage resonator (146) are opposite to each other.

Description

technical field [0001] The present invention relates to bandpass filters. Background technique [0002] In Non-Patent Document 1 figure 1 In the figure, a band-pass filter is shown, which includes a substrate made of a dielectric, a ground conductor layer provided on the main surface below the substrate, and n pieces of the main surface provided on the upper side of the substrate (Non-Patent Document 1 where n=6) the resonator, the first circuit and the second circuit. [0003] Each of the n resonators is composed of a strip conductor bent into a rectangular shape with a gap between the ends thereof, and is arranged in two rows and n / 2 columns. The first line is connected to the resonator of the first stage, and the second line is coupled to the resonator of the last stage. [0004] The first line and the second line are respectively connected to the vicinity of the midpoint of the strip conductor constituting each of the first-stage resonator and the last-stage resonator...

Claims

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Application Information

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IPC IPC(8): H01P1/203
CPCH01P1/203H01P1/20381H01P1/20363H01P7/082
Inventor 长谷川雄大
Owner THE FUJIKURA CABLE WORKS LTD