CN105186132A - Low-loss micro-unit low-pass frequency selection surface radome and manufacturing method - Google Patents
Low-loss micro-unit low-pass frequency selection surface radome and manufacturing method Download PDFInfo
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- CN105186132A CN105186132A CN201510655956.XA CN201510655956A CN105186132A CN 105186132 A CN105186132 A CN 105186132A CN 201510655956 A CN201510655956 A CN 201510655956A CN 105186132 A CN105186132 A CN 105186132A
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Abstract
The invention discloses a low-loss micro-unit low-pass frequency selection surface radome, including a first skin layer, a first foam layer, a second skin layer, a first conductive metal layer, a medium layer, a second conductive metal layer, a third skin layer, a second foam layer and a fourth skin layer which are arranged in sequence along a thickness direction; the first conductive metal layer includes first metal sheet period units; each first metal sheet period unit includes four first square metal sheets having equal areas, and distance between adjacent first square metal sheets is equal; the second conductive metal layer includes second metal sheet period units which include second square metal sheets; and the centers of the first metal sheet period units coincide with the centers of the second metal sheet period units. The invention also provides a method for manufacturing the radome. The insertion loss of a frequency selection radome can be reduced.
Description
Technical field
The invention belongs to frequency-selective surfaces sandwich field, be specifically related to a kind of low-loss micro unit lowpass frequency option table surface antenna cover and manufacture method, can be used for ultrashort wave frequency band electronic receiving equipment stealthing design.
Background technology
Tradition frequently material selection is generally planar structure, frequently material selection produces structure distribution electric capacity and inductance by the edge coupling between foil in plane, because the coupling efficiency at sheet metal edge is extremely low, cause frequency material selection periodic unit size larger relative to resonance wavelength, from general electromagnetic resonance theory, the resonance frequency that the large inevitable correspondence one of periodic unit size is lower, that is material selection is except main resonatnt frequency frequently, also there is multistage resonance passband in (about 10GHz) in lower frequency range.The existence of multistage resonance passband causes the frequency of traditional VHF/UHF frequency range electronic equipment to select stealthy cover often can only adopt the integrated frequency-selective surfaces scheme of many stopbands, and the band resistance frequency-selective surfaces compound namely adopting multilayer to have different stop-band frequency forms lowpass frequency and selects surface; Because needs adopt multilayer resistance electromagnetic surface structure, when electromagnetic wave is selected surperficial through said frequencies, electromagnetic wave is subject to the scattering on each stopband frequency choosing surface and decays, and then the insertion loss causing whole low passband choosing surperficial comparatively greatly, complex structure.
Summary of the invention
The object of the invention is to solve existing many stopbands complex low-pass selects surface due to complex structure frequently, cause the technical problem excessive to electromagnetic wave insertion loss in band, propose a kind of low-loss micro unit lowpass frequency option table surface antenna cover and manufacture method, this radome adopts single-frequency to select layer radome can realize the reflection of electromagnetic wave ability selecting surface similar in 8 ~ 18GHz band limits with existing low passband, significantly can reduce the insertion loss frequently selecting radome; This manufacture method is simple.
The present invention is achieved in that
A kind of low-loss micro unit lowpass frequency option table surface antenna cover, comprises the first skinning layer, the first froth bed, the second skinning layer, the first conductive metal layer, dielectric layer, the second conductive metal layer, the 3rd skinning layer, the second froth bed, the 4th skinning layer that through-thickness sets gradually;
First skinning layer, the first froth bed, the second skinning layer form the first interlayer, 3rd skinning layer, the second froth bed, the 4th skinning layer form the second interlayer, first conductive metal layer, dielectric layer, the second conductive metal layer form frequency and select layer, and the glass fiber reinforced plastics composite material interlayer that the first interlayer and the second interlayer are formed will select layer to clamp frequently;
Described first conductive metal layer comprises the first sheet metal periodic unit along level and vertical direction periodic arrangement of more than one even setting; Described first sheet metal periodic unit comprises the first square sheet metal of four area equation evenly arranged, and (the first square sheet metal is along level and vertical direction periodic arrangement, four the first square sheet metals lay respectively at the corner of the first sheet metal periodic unit), the area of the first square sheet metal is 1mm
2~ 10mm
2, the distance between adjacent first square sheet metal is equal, and this distance is less than the size (that is, the distance between adjacent first square sheet metal is less than length and the width of the first square sheet metal) of the first square sheet metal;
Described second conductive metal layer comprises the second sheet metal periodic unit of more than one even setting, and described second sheet metal periodic unit is along level and vertical direction periodic arrangement; Described second sheet metal periodic unit comprises one and the equal-sized second square sheet metal of the first square sheet metal, and four limits of the second square sheet metal are parallel with four limits of the second sheet metal periodic unit;
Distance between adjacent second square sheet metal is equal with the distance between adjacent first square sheet metal; The center superposition of the first sheet metal periodic unit and the second sheet metal periodic unit.
Single-frequency is utilized to select structure to produce low pass effect, frequently the equivalent electric circuit of periodic structure is selected must to be shunt capacitance structure, adopt this structure can produce above-mentioned equivalent electric circuit, and its electric capacity is enough large, whole frequency is caused to select periodic unit small-sized, while guarantee equivalent electric circuit shunt capacitance is enough large, the multistage resonance passband of material selection frequently can be avoided on the impact frequently selecting characteristic.
Further scheme is: the area of described first square sheet metal and the second square sheet metal is 1mm
2~ 5mm
2, control in 0.3GHz ~ 3GHz band limits with the better cut-off frequency by frequency material selection.
Further scheme is: described dielectric layer is made up of the dielectric material of low-loss tangent, and thickness is less than 1mm;
Frequently the insertion loss of material selection refers to that material selection is to loss size electromagnetic in passband frequently, the important sources that insertion loss produces is exactly the size of material selection dielectric layer loss tangent frequently, adopts the dielectric layer of low-loss tangent mainly in order to reduce the insertion loss of whole frequency material selection;
Electric capacity due to this frequency material selection equivalent electric circuit is coupled by the face, face between dielectric layer positive and negative sheet metal to produce, thickness of dielectric layers is less, under same size, producible electric capacity is larger, can ensure that material selection periodic unit structure is enough little frequently, better avoids the multistage harmonic influence of material selection frequently.
Further scheme is: described dielectric layer is pcb board.
Further scheme is: described first skinning layer, the second skinning layer, the 3rd skinning layer are the fiberglass covering that thickness is identical with the 4th skinning layer, and thickness is less than 1mm; The thickness of described first froth bed, the second froth bed is identical, and thickness is 3mm ~ 30mm; Adopt above-mentioned thickness to realize mechanical support, do not affect again the function of whole radome.
The present invention also provides the manufacture method of above-mentioned low-loss micro unit lowpass frequency option table surface antenna cover, comprises the steps:
Step one, make the first conductive metal layer in the front of dielectric layer, make the second conductive metal layer at the reverse side of dielectric layer, complete the making frequently selecting layer;
Step 2, make the first interlayer and the second interlayer, make the first interlayer and the second interlayer form glass fiber reinforced plastics composite material interlayer;
Step 3, to be selected by the frequency made layer to insert glass fiber reinforced plastics composite material interlayer, complete the making of low-loss micro unit lowpass frequency option table surface antenna cover.
Structure of the present invention is simple, overall dimensions is little, the frequency of low-loss micro unit lowpass frequency option table surface antenna cover can be made to select layer (the first conductive metal layer, dielectric layer, the second conductive metal layer composition select layer frequently) thickness to be less than 15mm, frequently select layer periodic unit size to be less than 15mm, avoid and to be frequently selected in X, Ku frequency range multistage resonance passband to the impact frequently selecting radome stealth capabilities;
The present invention adopts single-frequency to select layer can form its low pass selecting frequency characteristic, single-frequency select Rotating fields greatly reduce whole frequency select radome to band in electromagnetic insertion loss, the insertion loss in its shortwave ultrashort wave frequency band can be reduced to below 0.3dB;
Sandwich (the first skinning layer that the present invention adopts two to be made up of thin fiberglass covering and thick froth bed, first froth bed, second skinning layer forms the first interlayer, 3rd skinning layer, second froth bed, 4th skinning layer forms the second interlayer) to frequently selecting layer (the first conductive metal layer, dielectric layer, second conductive metal layer composition selects layer frequently) carry out reinforcing and encapsulating, reduce low-loss micro unit lowpass frequency option table surface antenna cover mechanical support structure to the impact of low-loss micro unit lowpass frequency option table surface antenna cover wave transparent characteristic, the insertion loss of whole low-loss micro unit lowpass frequency option table surface antenna cover is made to control at below 0.5dB, to X, the electromagnetic wave transmission rate of Ku frequency range is less than-10dB,
The present invention not only easy to make, cost of manufacture is low, and can reduce the insertion loss frequently selecting radome.
Accompanying drawing explanation
Fig. 1 is the tangent plane structural representation of low-loss micro unit lowpass frequency option table surface antenna cover of the present invention;
Fig. 2 is the structural representation of the first sheet metal periodic unit;
Wherein dotted line frame scope is the one-period unit of frequency-selective surfaces;
Fig. 3 is the structural representation of the second sheet metal periodic unit;
Wherein dotted line frame scope is the one-period unit of frequency-selective surfaces;
Fig. 4 is the partial structurtes schematic diagram of the first conductive metal layer;
Fig. 5 is the partial structurtes schematic diagram of the second conductive metal layer.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
See Fig. 1-Fig. 5, a kind of low-loss micro unit lowpass frequency option table surface antenna cover, comprises the first skinning layer 41, first froth bed 51, second skinning layer 42, first conductive metal layer 1, dielectric layer 2, second conductive metal layer 2, the 3rd skinning layer 43, second froth bed 52, the 4th skinning layer 44 that through-thickness sets gradually; First skinning layer 41, first froth bed 51, second skinning layer 42 forms the first interlayer, 3rd skinning layer 43, second froth bed 52, the 4th skinning layer 44 form the second interlayer, first conductive metal layer 1, dielectric layer 2, second conductive metal layer 2 form frequency and select layer, and the glass fiber reinforced plastics composite material interlayer that the first interlayer and the second interlayer are formed will select layer to clamp frequently; Described first skinning layer 41, second skinning layer 42, the 3rd skinning layer 43 are the fiberglass covering that thickness is identical with the 4th skinning layer 44, and thickness is less than 1mm; The thickness of described first froth bed 51, second froth bed 52 is identical, and thickness is 3mm ~ 30mm; Described dielectric layer 3 is less than the pcb board of 1mm for thickness;
Described first conductive metal layer 1 comprises the first sheet metal periodic unit 11 along level and vertical direction periodic arrangement of more than one even setting, and the spacing of adjacent first sheet metal periodic unit 11 is equal; The first square sheet metal 7, four the first square sheet metals 7 that described first sheet metal periodic unit 11 comprises four area equation evenly arranged lay respectively at the corner of the first sheet metal periodic unit 11, and the area of the first square sheet metal 7 is 1mm
2~ 10mm
2specifically require according to choosing frequently the size determining the first square sheet metal 7, distance between adjacent first square sheet metal 7 is equal, and this distance is less than the size of the first square sheet metal 7, and the distance namely between adjacent first square sheet metal 7 is less than length and the width of the first square sheet metal 7;
Described second conductive metal layer 2 comprises the second sheet metal periodic unit 21 of more than one even setting, and described second sheet metal periodic unit 21 is along level and vertical direction periodic arrangement, and the spacing of adjacent second sheet metal periodic unit 21 is equal; Described second sheet metal periodic unit 21 comprises one and the equal-sized second square sheet metal 8 of the first square sheet metal 7;
Distance between adjacent second square sheet metal 8 and adjacent first square sheet metal) between distance equal; The center superposition of the first sheet metal periodic unit 11 and the second sheet metal periodic unit 21.
A kind of step making above-mentioned low-loss micro unit lowpass frequency option table surface antenna cover is:
Step one, make the first conductive metal layer 1 in the front of pcb board, make the second conductive metal layer 2 at the reverse side of pcb board, complete the making frequently selecting layer;
Step 2, make the first interlayer and the second interlayer, make the first interlayer and the second interlayer form glass fiber reinforced plastics composite material interlayer;
Step 3, to be selected by the frequency made layer to insert glass fiber reinforced plastics composite material interlayer, complete the making of low-loss micro unit lowpass frequency option table surface antenna cover.
The present invention can be used for the design electronic equipment low-losses such as HF, VHF, UHF, L band communication, navigation being selected frequently to Stealthy reflector Antenna cover.
Claims (6)
1. a low-loss micro unit lowpass frequency option table surface antenna cover, is characterized in that: comprise the first skinning layer (41), the first froth bed (51), the second skinning layer (42), the first conductive metal layer (1), dielectric layer (2), the second conductive metal layer (2), the 3rd skinning layer (43), the second froth bed (52), the 4th skinning layer (44) that through-thickness sets gradually;
First skinning layer (41), the first froth bed (51), the second skinning layer (42) form the first interlayer, 3rd skinning layer (43), the second froth bed (52), the 4th skinning layer (44) form the second interlayer, first conductive metal layer (1), dielectric layer (2), the second conductive metal layer (2) form frequency and select layer, and the glass fiber reinforced plastics composite material interlayer that the first interlayer and the second interlayer are formed will select layer to clamp frequently;
Described first conductive metal layer (1) comprises the first sheet metal periodic unit (11) of more than one even setting; It is 1mm that described first sheet metal periodic unit (11) comprises four areas evenly arranged
2~ 10mm
2the first square sheet metal (7), the distance between adjacent first square sheet metal (7) is equal, and this distance is less than the size of the first square sheet metal (7);
Described second conductive metal layer (2) comprises the second sheet metal periodic unit (21) of more than one even setting, and described second sheet metal periodic unit (21) comprises one and the equal-sized second square sheet metal (8) of the first square sheet metal (7);
Distance between adjacent second square sheet metal (8) is equal with the distance between adjacent first square sheet metal (7); The center superposition of the first sheet metal periodic unit (11) and the second sheet metal periodic unit (21).
2. low-loss micro unit lowpass frequency option table surface antenna cover as claimed in claim 1, is characterized in that: the area of described first square sheet metal (7) and the second square sheet metal (8) is 1mm
2~ 5mm
2.
3. low-loss micro unit lowpass frequency option table surface antenna cover as claimed in claim 1, is characterized in that: described dielectric layer (3) is made up of the dielectric material of low-loss tangent, and thickness is less than 1mm.
4. low-loss micro unit lowpass frequency option table surface antenna cover as claimed in claim 3, is characterized in that: described dielectric layer (3) is pcb board.
5. low-loss micro unit lowpass frequency option table surface antenna cover as claimed in claim 1, it is characterized in that: described first skinning layer (41), the second skinning layer (42), the 3rd skinning layer (43) are identical with the thickness of the 4th skinning layer (44), and thickness is less than 1mm; The thickness of described first froth bed (51), the second froth bed (52) is identical, and thickness is 3mm ~ 30mm.
6. make a method for the low-loss micro unit lowpass frequency option table surface antenna cover described in the arbitrary claim of 1-5, it is characterized in that comprising the steps:
Step one, make the first conductive metal layer (1) in the front of dielectric layer (3), make the second conductive metal layer (2) at the reverse side of dielectric layer (3), complete the making frequently selecting layer;
Step 2, make the first interlayer and the second interlayer, make the first interlayer and the second interlayer form glass fiber reinforced plastics composite material interlayer;
Step 3, to be selected by the frequency made layer to insert glass fiber reinforced plastics composite material interlayer, complete the making of low-loss micro unit lowpass frequency option table surface antenna cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510655956.XA CN105186132B (en) | 2015-10-13 | 2015-10-13 | Low-loss micro unit lowpass frequency option table surface antenna cover and manufacture method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510655956.XA CN105186132B (en) | 2015-10-13 | 2015-10-13 | Low-loss micro unit lowpass frequency option table surface antenna cover and manufacture method |
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| Publication Number | Publication Date |
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| CN105186132A true CN105186132A (en) | 2015-12-23 |
| CN105186132B CN105186132B (en) | 2016-07-06 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105789910A (en) * | 2016-04-19 | 2016-07-20 | 成都德杉科技有限公司 | Circular-polarized frequency selection surface structure |
| CN107834194A (en) * | 2017-10-18 | 2018-03-23 | 西安天和防务技术股份有限公司 | Filter antenna cover |
| CN107946762A (en) * | 2017-11-15 | 2018-04-20 | 哈尔滨工业大学 | X-band based on C-type clamp layer radome wall construction minimizes high wave transparent FSS |
| CN109216930A (en) * | 2017-07-03 | 2019-01-15 | 上海东峻信息科技有限公司 | The high wave transparent frequency-selective surfaces construction design method of ultra-wide passband, wide-angle |
| WO2019134599A1 (en) * | 2018-01-08 | 2019-07-11 | 深圳光启尖端技术有限责任公司 | Antenna cover |
| CN112235005A (en) * | 2019-06-30 | 2021-01-15 | Oppo广东移动通信有限公司 | Display screen assembly, antenna assembly and electronic equipment |
| CN114784497A (en) * | 2022-04-29 | 2022-07-22 | 中国舰船研究设计中心 | High-power-resistant three-dimensional frequency-selection antenna housing structure |
-
2015
- 2015-10-13 CN CN201510655956.XA patent/CN105186132B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105789910A (en) * | 2016-04-19 | 2016-07-20 | 成都德杉科技有限公司 | Circular-polarized frequency selection surface structure |
| CN109216930A (en) * | 2017-07-03 | 2019-01-15 | 上海东峻信息科技有限公司 | The high wave transparent frequency-selective surfaces construction design method of ultra-wide passband, wide-angle |
| CN107834194A (en) * | 2017-10-18 | 2018-03-23 | 西安天和防务技术股份有限公司 | Filter antenna cover |
| CN107834194B (en) * | 2017-10-18 | 2023-10-10 | 西安天和防务技术股份有限公司 | Filtering antenna housing |
| CN107946762A (en) * | 2017-11-15 | 2018-04-20 | 哈尔滨工业大学 | X-band based on C-type clamp layer radome wall construction minimizes high wave transparent FSS |
| WO2019134599A1 (en) * | 2018-01-08 | 2019-07-11 | 深圳光启尖端技术有限责任公司 | Antenna cover |
| CN112235005A (en) * | 2019-06-30 | 2021-01-15 | Oppo广东移动通信有限公司 | Display screen assembly, antenna assembly and electronic equipment |
| CN112235005B (en) * | 2019-06-30 | 2022-01-04 | Oppo广东移动通信有限公司 | Display screen assembly, antenna assembly and electronic equipment |
| CN114784497A (en) * | 2022-04-29 | 2022-07-22 | 中国舰船研究设计中心 | High-power-resistant three-dimensional frequency-selection antenna housing structure |
| CN114784497B (en) * | 2022-04-29 | 2023-05-16 | 中国舰船研究设计中心 | High-power-resistant three-dimensional frequency-selective radome structure |
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|---|---|
| CN105186132B (en) | 2016-07-06 |
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