CN102931455A - Dual-frequency millimeter wave frequency selective surface - Google Patents
Dual-frequency millimeter wave frequency selective surface Download PDFInfo
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- CN102931455A CN102931455A CN2012103648125A CN201210364812A CN102931455A CN 102931455 A CN102931455 A CN 102931455A CN 2012103648125 A CN2012103648125 A CN 2012103648125A CN 201210364812 A CN201210364812 A CN 201210364812A CN 102931455 A CN102931455 A CN 102931455A
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Abstract
The invention relates to a dual-frequency millimeter wave frequency selective surface. Working bands of the frequency selective surface are 50 to 58GHz and 85 to 93GHz, and corresponding center frequencies are 54GHz and 89GHz respectively. The frequency selective surface comprises a plurality of lines. Periodical units in each line are arranged in a 90-degree arrangement way. The periodical units are flat plate-shaped cuboids, are 3,550 to 3,650um long, 1,650 to 1,750um wide and 450 to 550um thick, and are made of a metal material. Dipoles are arranged at the central positions of the periodical units, and are irregular gap structures. Each gap structure comprises a first region, a second region, a third region, a fourth region, a fifth region and a sixth region. The third regions and the extended parts of the third regions in the first regions form seventh regions.
Description
Technical field
The present invention relates to wireless communication field, particularly a kind of double frequency millimeter-wave frequency is selected the surface.
Background technology
Frequency-selective surfaces (Frequency Selective Surfaces, FSS) is a kind of two-dimensionally periodic structure with frequency selective characteristic.As a kind of novel spatial filter, each periodic unit of FSS is equivalent to a passive resonance device, and all these passive resonance devices periodically come by certain way and just consisted of together the filter that can carry out to electromagnetic wave filtering.Because FSS has than the more advantage of conventional filter in millimere-wave band and submillimeter region, thereby have very widely in the military and civilian field and to use, FSS has become a study hotspot in recent years.
Progress along with microwave remote sensing technique, the spaceborne detection system of millimeter wave submillimeter wave has become a main flow trend, its operating frequency forward Terahertz future development, select the surface by frequency of utilization, can realize that multiband is multiplexing, thereby frequency-selective surfaces becomes one of core component in the quasi-optics dividing network.
The frequency-selective surfaces that is used for the quasi-optics dividing network should satisfy following specification requirement:
1, incidence angle is fixed: according to the requirement of dividing network structure, the incidence angle of incident wave is restricted to 45 °, and this just requires to consider this factor when design, to realize best selecting frequency characteristic.
2, low-loss: the loss source of frequency-selective surfaces is more, thermal losses, insertion loss, graing lobe loss etc. are arranged, therefore in design, to consider the characteristic of size, shape and the dielectric layer of periodic pattern unit, with bandwidth, operating frequency, transmission coefficient and the reflection coefficient that reaches the design objective requirement.
3, polarization stability: frequency-selective surfaces should have stable operating characteristic under the excitation of different polarized waves.
Frequency-selective surfaces majority of the prior art only has an operating frequency section, has affected its range of application.
Summary of the invention
The object of the invention is to overcome the defective that frequency-selective surfaces of the prior art only has an operating frequency section, thereby a kind of frequency-selective surfaces that can be operated in two frequency bands is provided.
To achieve these goals, the invention provides a kind of double frequency millimeter-wave frequency and select the surface, the working band of this frequency-selective surfaces is 50-58GHz and 85-93GHz, and corresponding centre frequency is respectively 54GHz and 89GHz; This frequency-selective surfaces includes multirow, and the periodic unit in each row is arranged with 90 ° of arrangement modes;
Described periodic unit is flat cuboid, and its length is between 3550-3650um, and width is between 1650-1750um, and thickness is between 450-550um; Described periodic unit adopts metal material to make;
The center of described periodic unit is provided with dipole, and described dipole is irregular gap structure, and this gap structure comprises first area, second area, the 3rd zone, the 4th zone, the 5th zone and the 6th zone; Wherein,
Described first area is positioned at the center of described periodic unit;
Described second area links to each other with the upper left side of described first area;
Described the 3rd zone is adjacent with described the 4th zone, and is positioned at described four-range top; Described the 3rd zone, described the 4th zone link to each other with the lower left of described first area;
Described the 5th zone is adjacent with described the 6th zone, and is positioned at the below in described the 6th zone; Described the 5th zone, described the 6th zone link to each other with the upper right side of described first area;
Described the 3rd zone forms the SECTOR-SEVEN territory with the prolongation of described the 3rd zone in described first area; The centre frequency of described first area is 54GHz, and its length is the 52%-55% of its centre frequency corresponding wavelength, and width is the 8%-10% of its centre frequency corresponding wavelength; The centre frequency in described SECTOR-SEVEN territory is 89GHz, and its length is the 22%-26% of its centre frequency corresponding wavelength, and width is the 8%-11% of its centre frequency corresponding wavelength.
In the technique scheme, described first area, second area, the 3rd zone, the 4th zone, the 5th zone and the 6th zone are rectangle or chamfering rectangle.
In the technique scheme, the length of described first area is 3000um, and wide is 500um.
In the technique scheme, the length of described second area is 400um, and wide is 150um, and its top edge is apart from the top edge 500um of first area.
In the technique scheme, the length in described the 3rd zone is 400um, and wide is 350um.
In the technique scheme, described four-range is long to be 370um, and wide is 190um, and described four-range lower limb is apart from the lower limb 530um of first area.
In the technique scheme, the length in described the 5th zone is 300um, and wide is 200um, the lower limb 1900um of its described first area of lower limb distance.
In the technique scheme, the length in described the 6th zone is 370um, and wide is 190um, the top edge 740um of its described first area of top edge distance.
The invention has the advantages that:
1, can realize the double frequency band-pass frequency filtering property;
2, the single-layer metal structure is relatively simple, need not medium and loads, and is convenient to processing;
3, curve characteristic is precipitous, and high to the isolation with outer frequency, selectivity is good;
4, structural parameters are by accurate optimization, and filtering characteristic is good;
5, physical characteristics of materials is stable, and characteristic drift is little in actual applications; Working band is wide.
Description of drawings
Fig. 1 is the vertical view of the periodic unit of frequency-selective surfaces of the present invention;
Fig. 2 is the arrangement mode schematic diagram of frequency-selective surfaces of the present invention;
Fig. 3 is the schematic diagram of the transmission coefficient curve of frequency-selective surfaces;
Fig. 4 is the schematic diagram of the loss characteristic curve of frequency-selective surfaces.
Embodiment
Now the invention will be further described by reference to the accompanying drawings.
Double frequency millimeter-wave frequency option table face of the present invention comprises a plurality of periodic units, and each periodic unit has identical structure.The below is at first described the structure of periodic unit.
Fig. 1 is the vertical view of the periodic unit of frequency-selective surfaces of the present invention, and as can be seen from the figure, described periodic unit is flat cuboid, and its length is between 3550-3650um, and its width is between 1650-1750um, and its thickness is between 450-550um.As a kind of preferred implementation, in the present embodiment, the length of described periodic unit is 3600um, and wide is 1700um, and height is 500um.This periodic unit adopts metal material to make, and in the present embodiment, described metal material is copper.
The center of described periodic unit is provided with dipole.Described dipole is through hole, becomes irregular gap structure, for convenience of description, described gap structure is divided into 6 zones, is respectively first area 1, second area 2, the 3rd zone 3, the 4th zone 4, the 5 and the 6th zone 6, the 5th zone.The below is described size and the structure in 6 zones of periodic unit related in the present embodiment.
Described first area 1 is rectangle, is in the center of periodic unit, and it is long to be 3000um, and wide is 500um.
Described second area 2 is rectangle, and it is long to be 400um, and wide is 150um.This second area 2 is interconnected with first area 1.The top edge of described second area 2 is apart from the top edge 500um of first area 1.
Described the 3rd zone 3 is rectangle, and it is long to be 400um, and wide is 350um.Described the 3rd zone 3 is communicated with the 4th zone 4, first area 1.
Described the 4th zone 4 is rectangle, and it is long to be 370um, and wide is 190um.Be interconnected between the 4 and the 3rd zone 3, the 4th zone, the first area 1.The lower limb in the 4th zone 4 is apart from the lower limb 530um of first area 1.
Described the 5th zone 5 is rectangle, and it is long to be 300um, and wide is 200um.The 5th zone 5 is communicated with the 6th zone 6, first area 1, and its lower limb is apart from the lower limb 1900um of first area 1.
Described the 6th zone 6 is rectangle, and it is long to be 370um, and wide is 190um.Be interconnected between the 6th zone 6, the 5th zone 5 and the first area 1, its top edge is apart from the top edge 740um of first area 1.
Can there be error in above-mentioned numerical parameter in certain limit, and error amount is no more than in principle 5% of initial value and is advisable.
In the present embodiment, above-mentioned first area 1, second area 2, the 3rd zone 3, the 4th zone 4, the 5 and the 6th zone 6, the 5th zone all are rectangle, but in other embodiments, above-mentioned zone also can be the chamfering rectangle.
Described the 3rd zone 3 forms SECTOR-SEVEN territory 7 with the prolongation of described the 3rd zone 3 in described first area 1, and this SECTOR-SEVEN territory 7 has important impact with first area 1 for resonance frequency.The length of first area 1 is about the 52%-55% of its corresponding centre frequency (54GHz) corresponding wavelength, and width is about about the 8%-10% of corresponding centre frequency (54GHz) corresponding wavelength.The length in SECTOR-SEVEN territory 7 is about the 22%-26% of its corresponding centre frequency (89GHz) corresponding wavelength, and width is about about the 8%-11% of corresponding centre frequency (89GHz) corresponding wavelength.
It more than is the description to the periodic unit of frequency-selective surfaces of the present invention.The below is illustrated the arrangement mode of described periodic unit.
With reference to figure 2, frequency-selective surfaces of the present invention includes multirow, periodic unit in every delegation is all placed in an identical manner, periodic unit in the different rows is also placed in an identical manner, so that described periodic unit is arranged with 90 ° of arrangement modes, it is grid-like that whole frequency-selective surfaces becomes on the whole.
Frequency-selective surfaces of the present invention has good operating characteristic, and Fig. 3 is the transmission coefficient curve of frequency-selective surfaces, has the bandpass characteristics of 54GHz and two frequency ranges of 89GHz, and Fig. 4 is the loss characteristic curve of frequency-selective surfaces.These two figure have illustrated that frequency-selective surfaces of the present invention has good characteristic in the frequency range of 54GHz and 89GHz.
It should be noted last that above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although with reference to embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (8)
1. a double frequency millimeter-wave frequency is selected the surface, it is characterized in that the working band of this frequency-selective surfaces is 50-58GHz and 85-93GHz, and corresponding centre frequency is respectively 54GHz and 89GHz; This frequency-selective surfaces includes multirow, and the periodic unit in each row is arranged with 90 ° of arrangement modes;
Described periodic unit is flat cuboid, and its length is between 3550-3650um, and width is between 1650-1750um, and thickness is between 450-550um; Described periodic unit adopts metal material to make;
The center of described periodic unit is provided with dipole, described dipole is irregular gap structure, and this gap structure comprises first area (1), second area (2), the 3rd zone (3), the 4th zone (4), the 5th zone (5) and the 6th zone (6); Wherein,
Described first area (1) is positioned at the center of described periodic unit;
Described second area (2) links to each other with the upper left side of described first area (1);
Described the 3rd zone (3) is adjacent with described the 4th zone (4), and is positioned at the top in described the 4th zone (4); Described the 3rd zone (3), described the 4th zone (4) link to each other with the lower left of described first area (1);
Described the 5th zone (5) is adjacent with described the 6th zone (6), and is positioned at the below in described the 6th zone (6); Described the 5th zone, described the 6th zone link to each other with the upper right side of described first area;
Described the 3rd zone forms the SECTOR-SEVEN territory with the prolongation of described the 3rd zone in described first area; The centre frequency of described first area is 54GHz, and its length is the 52%-55% of its centre frequency corresponding wavelength, and width is the 8%-10% of its centre frequency corresponding wavelength; The centre frequency in described SECTOR-SEVEN territory is 89GHz, and its length is the 22%-26% of its centre frequency corresponding wavelength, and width is the 8%-11% of its centre frequency corresponding wavelength.
2. double frequency millimeter-wave frequency according to claim 1 is selected the surface, it is characterized in that, described first area, second area, the 3rd zone, the 4th zone, the 5th zone and the 6th zone are rectangle or chamfering rectangle.
3. double frequency millimeter-wave frequency according to claim 1 is selected the surface, it is characterized in that the length of described first area is 3000um, and wide is 500um.
4. double frequency millimeter-wave frequency according to claim 1 is selected the surface, it is characterized in that the length of described second area is 400um, and wide is 150um, and its top edge is apart from the top edge 500um of first area.
5. double frequency millimeter-wave frequency according to claim 1 is selected the surface, it is characterized in that the length in described the 3rd zone is 400um, and wide is 350um.
6. double frequency millimeter-wave frequency according to claim 1 is selected the surface, it is characterized in that, described four-range is long to be 370um, and wide is 190um, and described four-range lower limb is apart from the lower limb 530um of first area.
7. double frequency millimeter-wave frequency according to claim 1 is selected the surface, it is characterized in that the length in described the 5th zone is 300um, and wide is 200um, the lower limb 1900um of its described first area of lower limb distance.
8. double frequency millimeter-wave frequency according to claim 1 is selected the surface, it is characterized in that the length in described the 6th zone is 370um, and wide is 190um, the top edge 740um of its described first area of top edge distance.
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| CN201210364812.5A CN102931455B (en) | 2012-09-26 | 2012-09-26 | Dual-frequency millimeter wave frequency selective surface |
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| CN201210364812.5A CN102931455B (en) | 2012-09-26 | 2012-09-26 | Dual-frequency millimeter wave frequency selective surface |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109585988A (en) * | 2018-12-03 | 2019-04-05 | 中国计量大学 | Flakes two-band terahertz filter |
| CN113690625A (en) * | 2021-08-12 | 2021-11-23 | 电子科技大学 | Single-layer all-metal band-pass type self-supporting frequency selection surface structure |
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| US5400043A (en) * | 1992-12-11 | 1995-03-21 | Martin Marietta Corporation | Absorptive/transmissive radome |
| US20050179614A1 (en) * | 2004-02-18 | 2005-08-18 | Nagy Louis L. | Dynamic frequency selective surfaces |
| CN102682858A (en) * | 2011-03-15 | 2012-09-19 | 深圳光启高等理工研究院 | Wave-absorbing material |
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2012
- 2012-09-26 CN CN201210364812.5A patent/CN102931455B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5400043A (en) * | 1992-12-11 | 1995-03-21 | Martin Marietta Corporation | Absorptive/transmissive radome |
| US20050179614A1 (en) * | 2004-02-18 | 2005-08-18 | Nagy Louis L. | Dynamic frequency selective surfaces |
| CN102682858A (en) * | 2011-03-15 | 2012-09-19 | 深圳光启高等理工研究院 | Wave-absorbing material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109585988A (en) * | 2018-12-03 | 2019-04-05 | 中国计量大学 | Flakes two-band terahertz filter |
| CN113690625A (en) * | 2021-08-12 | 2021-11-23 | 电子科技大学 | Single-layer all-metal band-pass type self-supporting frequency selection surface structure |
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| CN102931455B (en) | 2014-12-31 |
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Address after: 100190 No. two south of Zhongguancun, Haidian District, Beijing 1 Patentee after: NATIONAL SPACE SCIENCE CENTER, CAS Address before: 100190 No. two south of Zhongguancun, Haidian District, Beijing 1 Patentee before: Space Science & Applied Research Centre, Chinese Academy of Sciences |