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Dielectric cavity frequency selective surface structure

A technology of frequency selective surface and dielectric cavity, applied in the direction of electrical components, circuits, resonators, etc., can solve the problems of small frequency response curve slope, few controllable parameters, poor polarization stability, etc., and achieve easy processing, wide application, The effect of superior performance

Inactive Publication Date: 2016-11-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 2) The invention patent application with the Chinese patent application number 201510953990.5 discloses a frequency selective surface structure based on a three-dimensional structure, such as figure 2 As shown, it solves the problems that the existing frequency selective surface with simple structure has relatively few controllable parameters, the slope of the frequency response curve is small, the polarization stability is poor, and the miniaturization is poor in practical applications.

Method used

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  • Dielectric cavity frequency selective surface structure

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Embodiment 1

[0040] Such as Figure 4 ~ Figure 10 As shown, the frequency selective surface structure of the dielectric cavity in this embodiment is formed by tightly stacking multilayer PCB boards. The first PCB board 1 is composed, the middle layer PCB board is composed of the second PCB board 2 , the third PCB board 3 and the fourth PCB board 4 , and the bottom PCB board is composed of the fifth PCB board 5 .

[0041] The first PCB board 1, the second PCB board 2, the third PCB board 3, the fourth PCB board 4 and the fifth PCB board 5 are all provided with a plurality of via holes 6, and the plurality of via holes 6 on each PCB board M*N cycle units are formed, and copper-clad traces 7 are left around each via hole 6; since the via holes 6 and copper-clad traces 7 of each PCB board can be regarded as electrical walls, each cycle unit It is equivalent to a dielectric cavity resonator; wherein, M>10, N>10, due to the large number of periodic units, only the number of periodic units of 2*...

Embodiment 2

[0050] The main features of this embodiment are: as Figure 12 As shown, the dielectric cavity frequency selective surface structure of the present embodiment is used as a three-frequency dielectric cavity frequency selective surface structure. In each periodic unit on the top PCB board, the first groove line 8 is along the X axis relative to the geometric center point of the periodic unit. The positive direction of the axis (+X axis) is offset by a distance S, and is rotated to the right by an angle θ relative to the Y axis; in each periodic unit on the bottom PCB board, the second groove line 9 is along the geometric center point of the periodic unit. The negative direction of the X-axis (-X-axis) is offset by a distance S, and the angle θ is rotated to the right relative to the Y-axis, that is to say, the first groove line 8 and the second groove line 9 are offset in opposite directions, and the direction of rotation same. All the other are with embodiment 1.

[0051] The...

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Abstract

The invention discloses a dielectric cavity frequency selective surface structure, which is formed by tightly stacking multiple layers of PCBs (Printed Circuit Boards), and is characterized in that the multiple layers of PCBs comprise a top-layer PCB, an intermediate-layer PCB and a bottom-layer PCB, both the top-layer PCB and the bottom-layer PCB are composed of one PCB, the intermediate PCB is composed of a plurality of PCBs, each PCB comprises M*N periodic units, and each periodic unit on the top-layer PCB and the bottom-layer PCB is provided with a slot line, wherein M>10, N>10. The dielectric cavity frequency selective surface structure has the characteristics of simple structure, easy processing and excellent performance, not only can serve as a single-frequency dielectric cavity frequency selective surface structure, but also can serve as a triple-frequency dielectric cavity frequency selective surface structure, is very wide in application with the scope involving many aspects of the electromagnetic field, and can be applied to an antenna housing, a multifrequency reflector antenna, a planar high-gain antenna, an electromagnetic compatible absorber, a polarizer, a waveguide filter, an artificial electromagnetic material and the like in a microwave band.

Description

technical field [0001] The invention relates to a frequency selective surface structure, in particular to a frequency selective surface structure of a dielectric cavity, belonging to the technical field of frequency selective surfaces. Background technique [0002] Frequency Selective Surface (FSS) is an infinite planar structure composed of the same patch or aperture unit arranged in two-dimensional periodicity. It has frequency selection for electromagnetic waves with different operating frequencies, polarization states and incident angles. characteristic. According to the different frequency responses to electromagnetic waves, FSS can be roughly divided into two types: one is the metal patch type, and the other is the aperture type complementary to the patch type structure, that is, slotting on the metal plate (groove line) )Structure. When the FSS is in a resonant state, the incident electromagnetic wave undergoes total reflection (the unit is a patch type) or total tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H01P7/06
CPCH01P1/20H01P7/06H01P7/065
Inventor 王世伟邓飞
Owner SOUTH CHINA UNIV OF TECH