CN203942018U - A kind of frequency-selective surfaces structure based on multi-layer annular slot patch - Google Patents
A kind of frequency-selective surfaces structure based on multi-layer annular slot patch Download PDFInfo
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- CN203942018U CN203942018U CN201420314135.0U CN201420314135U CN203942018U CN 203942018 U CN203942018 U CN 203942018U CN 201420314135 U CN201420314135 U CN 201420314135U CN 203942018 U CN203942018 U CN 203942018U
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Abstract
The utility model discloses a kind of frequency-selective surfaces structure based on multi-layer annular slot patch, formed by N × M resonant element, described resonant element comprises the medium substrate of two-layer parallel placement, the upper and lower surface of described every layer of medium substrate arranges respectively one deck annulus paster, described annulus paster structure specifically arranges respectively rectangular aperture at the mid point on four limits of interior ring of FSS annular paster, and described rectangular aperture is about point symmetry in interior ring limit.The utility model adopt four layers of annulus paster, realized the cascade of multistage band stop filter, make its be with resistive can be more superior, bandwidth is wider.
Description
Technical field
The utility model relates to a kind of spatial filter, particularly a kind of frequency-selective surfaces structure based on multi-layer annular slot patch.
Background technology
Frequency-selective surfaces (Frequency selective surface, FSS) be the metal patch unit by periodic arrangement, or by periodic a kind of two-dimension periodic array structure of perforate cell formation on metal screen, can be used as spatial filter, show band with electromagnetic wave phase mutual effect and lead to or be with and hinder characteristic.Frequency-selective surfaces has a wide range of applications in the many aspects in electromagnetism field, and it has contained most electromagnetic spectrum, comprises microwave, millimeter wave, even infrared band.Aspect military, FSS is mainly used in stealthy aspect, as radome, reduces Radar Cross Section by frequency-selective surfaces is installed.The Stealth Fighter of military spacecraft has become an important indicator weighing its fighting efficiency, by FSS technology appropriate design radome, can make in the operating frequency of radar, radome is transparent to it or connects diaphanous, but but can suppress the electromagnetic wave outside operating frequency, reduce the electromagnetic scattering of aircraft, can also reduce external interference.Aspect civilian, as absorbing material, be just applied in security protection, anti-electromagnetic wave interference, microwave dark room, information privacy and electromagnetic compatibility etc. various aspects; The frequency division multiplex system of satellite communication, frequency-selective surfaces is through being often used as the reflector of reflector antenna, select suitable paster (or hole) unit, its frequency characteristic is met for feedback sources 1, can completely or approach transmission completely, concerning feedback sources 2, can completely or approach reflection completely, the frequency division of so just having realized reflector antenna is multiplexing; FSS can also be used as reflector, improves the gain of antenna, reduces front and back ratio, improves the performance of antenna.
Since 20th century, Chinese scholars conducts in-depth research FSS.FSS mainly contains annular at present, circular, cross, rectangular patch etc., main realization the electromagnetic reflection completely of resonance frequency, these elementary cells are due to simple shape, so it is fewer that it controls parameter, be not well positioned to meet actual requirement, such as, narrow bandwidth, frequency response curve slope are little, poor stability etc., select surface although the method that can use loading capacitance and increase electrical length realizes double-stop band frequency, reach the requirement of multiple frequency broad band, but this method increases the complexity of structure.Because FSS is mainly subject to shape, size, cycle, the number of plies of paster and the parameter influence of medium substrate of unit.Therefore the trend of FSS development is now to use the construction unit more novel by design, such as designing combined type FSS structure, changing thin screen into thick Ping, Unit layer to bilayer or multilayer FSS structure extension, loaded medium etc., realize FSS broadband, miniaturization, good stability and reflecting properties are more superior etc.
Utility model content
The shortcoming and deficiency that exist in order to overcome prior art, the utility model provides a kind of frequency-selective surfaces structure based on multi-layer annular slot patch, the utility model is arranged on below ultra-wideband antenna, there is certain space length between the two, increase gain and the front and back ratio of antenna, improve the performance of antenna.
The utility model adopts following technical scheme:
A frequency-selective surfaces structure based on multi-layer annular slot patch, is made up of N × M resonant element, and described resonant element comprises the medium substrate of two-layer parallel placement, and the upper and lower surface of described every layer of medium substrate arranges respectively one deck annulus paster.
Described annulus paster specifically arranges respectively rectangular aperture at the mid point on four limits of interior ring of FSS annular paster, and described rectangular aperture is about point symmetry in interior ring limit.
Centered by the medium substrate standoff distance of described two-layer parallel placement 1/4th of frequency wavelength.
The beneficial effects of the utility model:
(1) increase gap in the surrounding of FSS annular paster dexterously, obtain annulus paster, change simple chip inductor into inductance and electric capacity in parallel, increased the design flexibility of frequency-selective surfaces, can reach better frequency requirement;
(2) adopt four layers of annulus paster, realized the cascade of multistage band stop filter, make its be with resistive can be more superior, bandwidth is wider;
(3) FSS can be used as the reflecting plate of ultra-wideband antenna, improves its directed radiation performance, ratio before and after increasing.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of the frequency-selective surfaces structure based on multi-layer annular slot patch;
Fig. 2 is the structural representation of annulus paster in Fig. 1;
Fig. 3 is the equivalent circuit diagram that annulus paster is connected with annulus paster;
Fig. 4 is the equivalent circuit diagram of a kind of frequency-selective surfaces structure based on multi-layer annular slot patch of the utility model;
Fig. 5 is according to the emulation schematic diagram of the annulus paster frequency-selective surfaces structure of embodiment size making.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
Embodiment
A kind of frequency-selective surfaces structure based on multi-layer annular slot patch, can be placed on the below of ultra-wideband antenna, formed by N × M resonant element, as shown in Figure 1, described resonant element comprises two-layer separated by a distance, and the medium substrate of parallel placement, and the distance 3 of two layer medium substrate can affect the resistive energy of being with of frequency-selective surfaces, in the present embodiment, centered by the distance of two layer medium substrate 1/4th of frequency 11GHz wavelength, be specially 8mm.
In order to improve the resistive energy of being with of frequency-selective surfaces FSS and to increase bandwidth, on the upper and lower surface of every layer of medium substrate, one deck annulus paster is set respectively, be specially: the upper and lower surface of upper layer medium substrate 1 arranges respectively ground floor annulus paster 4 and second layer annulus paster 5, the upper and lower surface of layer dielectric substrate 2 arranges respectively shellring shape slot patch 6 and the 4th layer of annulus paster 7.
As shown in Figure 2, described annulus paster specifically arranges respectively rectangular aperture at the mid point on four limits of interior ring of FSS annular paster, and described rectangular aperture is about point symmetry in every limit;
The size of annulus paster is approximately 1/4th of centre frequency wavelength, and FSS annular paster is about centrosymmetric, and the outer length of side of the annulus paster of the present embodiment is b=14mm, and the interior length of side is c=6mm, and unit is millimeter.
The length and width of rectangular aperture affect and are with resistive energy, the length of the rectangular aperture of the present embodiment is d=1.5mm, and width is e=2mm, and unit is millimeter.
Described resonant element is square, and the length of side is a=15mm.
Medium substrate material of the present utility model is FR4, and dielectric constant is 4.4, and dielectric loss is 0.02.
As shown in Figure 3, the phase septal space between described annulus paster and annulus paster forms electric capacity, and every layer of annulus paster forms the parallel connection of inductance and electric capacity, forms a kind of filter construction.
Described upper and lower medium substrate forms short-circuited transmission line, and its circuit impedance is the root power of air impedance divided by dielectric constant, and the space outside described two layer medium substrate forms short-circuited transmission line, and its circuit impedance is air impedance.
As shown in Figure 4, described ground floor annulus paster is equivalent to capacitor and inductor circuit 8, described second layer annulus paster is equivalent to capacitor and inductor circuit 9, described shellring shape slot patch is equivalent to capacitor and inductor circuit 10, described the 4th laminating sheet is equivalent to capacitor and inductor circuit 11, four layers of annular paster form the cascade of level Four equivalent capacity inductive circuit, Z
0for air impedance, Z
1for the impedance of medium substrate, the thickness that d is dielectric-slab.
The simulation figure that is illustrated in figure 5 the annulus paster frequency-selective surfaces structure that the utility model embodiment size makes, bandwidth is 2.7-13.2GHz, band resistance superior performance.
The utility model adopts multi-layer annular slot patch to improve the performance of frequency-selective surfaces, adopt annulus paster to realize single-stage equivalent capacity inductive circuit, resistive energy is with in realization, adopt multi-layer annular paster to form the cascade of multistage equivalent capacity inductive circuit, realize frequency-selective surfaces superior be with resistive energy and ultra broadband.
Above-described embodiment is preferably execution mode of the utility model; but execution mode of the present utility model is not limited by the examples; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection range of the present utility model.
Claims (3)
1. the frequency-selective surfaces structure based on multi-layer annular slot patch, formed by N × M resonant element, it is characterized in that, described resonant element comprises the medium substrate of two-layer parallel placement, and the upper and lower surface of described every layer of medium substrate arranges respectively one deck annulus paster.
2. a kind of frequency-selective surfaces structure based on multi-layer annular slot patch according to claim 1, it is characterized in that, described annulus paster specifically arranges respectively rectangular aperture at the mid point on four limits of interior ring of FSS annular paster, and described rectangular aperture is about point symmetry in interior ring limit.
3. a kind of frequency-selective surfaces structure based on multi-layer annular slot patch according to claim 1, is characterized in that, centered by the medium substrate standoff distance of two-layer parallel placement 1/4th of frequency wavelength.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420314135.0U CN203942018U (en) | 2014-06-12 | 2014-06-12 | A kind of frequency-selective surfaces structure based on multi-layer annular slot patch |
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| CN201420314135.0U CN203942018U (en) | 2014-06-12 | 2014-06-12 | A kind of frequency-selective surfaces structure based on multi-layer annular slot patch |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092010A (en) * | 2014-06-12 | 2014-10-08 | 华南理工大学 | Frequency selection surface structure based on multilayer annular slit pasters |
| CN105244631A (en) * | 2015-10-13 | 2016-01-13 | 东南大学 | High-gain transmission array for compensating oblique incident error |
| CN109599679A (en) * | 2018-10-25 | 2019-04-09 | 西安理工大学 | A kind of ultra wide band frequency selection surface texture applied to ultra-wideband antenna |
| CN110048201A (en) * | 2019-05-24 | 2019-07-23 | 中国计量大学上虞高等研究院有限公司 | Multiband Terahertz bandstop filter |
-
2014
- 2014-06-12 CN CN201420314135.0U patent/CN203942018U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092010A (en) * | 2014-06-12 | 2014-10-08 | 华南理工大学 | Frequency selection surface structure based on multilayer annular slit pasters |
| CN105244631A (en) * | 2015-10-13 | 2016-01-13 | 东南大学 | High-gain transmission array for compensating oblique incident error |
| CN105244631B (en) * | 2015-10-13 | 2019-01-29 | 东南大学 | A kind of design method for the high-gain transmission array antenna compensating oblique incidence error |
| CN109599679A (en) * | 2018-10-25 | 2019-04-09 | 西安理工大学 | A kind of ultra wide band frequency selection surface texture applied to ultra-wideband antenna |
| CN109599679B (en) * | 2018-10-25 | 2020-12-18 | 西安理工大学 | Ultra-wideband frequency selection surface structure applied to ultra-wideband antenna |
| CN110048201A (en) * | 2019-05-24 | 2019-07-23 | 中国计量大学上虞高等研究院有限公司 | Multiband Terahertz bandstop filter |
| CN110048201B (en) * | 2019-05-24 | 2020-10-13 | 中国计量大学上虞高等研究院有限公司 | Multi-band terahertz band elimination filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141112 Termination date: 20170612 |