Micro substrate integrated waveguide filter with high-order mode rejection

A substrate-integrated waveguide and filter technology, applied in waveguide devices, electrical components, circuits, etc., can solve problems such as unrealizable, wide stopband suppression performance, etc., to achieve improved selectivity, reduced lateral area, and increased crossover coupling effect

Active Publication Date: 2020-02-14
CHENGDU PINNACLE MICROWAVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these filters cannot achieve wide stop-band suppression perform...

Method used

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  • Micro substrate integrated waveguide filter with high-order mode rejection
  • Micro substrate integrated waveguide filter with high-order mode rejection
  • Micro substrate integrated waveguide filter with high-order mode rejection

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Experimental program
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Embodiment 1

[0062] Embodiments of the present invention provide a miniaturized substrate-integrated waveguide filter with high-order mode suppression, such as figure 1 and figure 2 Commonly shown, including the top PCB board 1 and the bottom PCB board 2, the top PCB board 1 and the bottom PCB board 2 have the same size, and are provided with 6 screw holes 3 with the same diameter at the same position, the top PCB board 1 and the bottom PCB board The boards 2 are closely fitted together by the screws passing through the screw holes 3 .

[0063] The center of the top PCB 1 is provided with a first rectangular SIW resonator 11, the center of the bottom PCB 2 is provided with a second rectangular SIW resonator 21, and one side of the top PCB 1 is provided with a first rectangular SIW resonator The coplanar waveguide input port 12 of the cavity 11, the opposite side of the bottom PCB board 2 is provided with a coplanar waveguide output port 22 extending into the second rectangular SIW resona...

Embodiment 2

[0085] On the basis of the first embodiment, the embodiment of the present invention adds cross-coupling between two rectangular SIW resonators. Such as Figure 4 As shown, the lower surface of the top PCB 1 is etched with a first rectangular groove 14, the first rectangular groove 14 is located in the center of the side of the first rectangular SIW resonator 11 opposite to the first microstrip resonator 13, and the bottom PCB A second rectangular groove 24 is etched on the upper surface of 2, and the second rectangular groove 24 is located in the center of the side of the second rectangular SIW resonator 21 opposite to the second microstrip resonator 23.

[0086] Wherein, the length m of the first rectangular slot 14 and the second rectangular slot 24 1 =2mm; The width n of the first rectangular groove 14 and the second rectangular groove 24 1 =0.2mm; the distance d between the first rectangular groove 14 and the second rectangular groove 24 from the center of the cavity x...

Embodiment 3

[0089] The embodiment of the present invention is based on the first embodiment, near the input and output ports of the filter, on the interface of the rectangular SIW resonant cavity, etch two slender rectangular grooves, and the two slender rectangular grooves are symmetrically distributed to resonate cavity sides. Such as Figure 7 As shown, the lower surface of the top layer PCB 1 is etched with a third rectangular groove 15 and a fourth rectangular groove 16, the third rectangular groove 15 is located near the coplanar waveguide input port 12, the third rectangular groove 15 and the fourth rectangular groove 16 The cavity center of the first rectangular SIW resonant cavity 11 is arranged symmetrically; the upper surface of the bottom PCB board 2 is etched with a fifth rectangular groove 25 and a sixth rectangular groove 26, and the sixth rectangular groove 26 is located near the output port 22 of the coplanar waveguide , the fifth rectangular groove 25 and the sixth rect...

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Abstract

The invention discloses a micro substrate integrated waveguide filter with high-order mode rejection and combines SIW and strip line technologies. A strip line resonator is cascaded between two SIW resonant cavities, so coupling of a TE201 mode and a TE102 mode between the two SIW resonant cavities is hindered, the designed filter has the characteristic of suppressing the SIW high-order mode, widestop band suppression performance is achieved, moreover, by using an SIW double-layer laminated structure and the strip line resonator, micro design of the SIW filter can be realized, moreover, rectangular grooves are etched at different positions of the SIW resonant cavity, so an extra transmission zero point can be introduced, and selectivity of the filter is improved.

Description

technical field [0001] The invention belongs to the technical field of substrate-integrated waveguide filters, and in particular relates to the design of a miniaturized substrate-integrated waveguide filter with high-order mode suppression. Background technique [0002] Substrate Integrated Waveguide (SIW) filters have received a lot of attention in the past few decades due to their excellent performance, such as high Q value, low insertion loss, and easy integration with planar circuits, and have made many achievements. Research results, and filters and other microwave devices based on SIW technology have been widely used in various wireless communication systems. With the continuous development of communication technology, the future is bound to gradually move towards the era of 5G and the Internet of Things. More tiny base stations will be installed in indoor spaces, which will further increase the demand for filters and put forward higher requirements for their performan...

Claims

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Application Information

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IPC IPC(8): H01P1/208
CPCH01P1/2088
Inventor 董元旦朱谊龙杨涛
Owner CHENGDU PINNACLE MICROWAVE CO LTD
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