CN102509856A - Double-row moment S-shaped pole antenna - Google Patents
Double-row moment S-shaped pole antenna Download PDFInfo
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- CN102509856A CN102509856A CN201110319017XA CN201110319017A CN102509856A CN 102509856 A CN102509856 A CN 102509856A CN 201110319017X A CN201110319017X A CN 201110319017XA CN 201110319017 A CN201110319017 A CN 201110319017A CN 102509856 A CN102509856 A CN 102509856A
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Abstract
The invention discloses a double-row moment S-shaped pole antenna which comprises an upper layer dielectric substrate (1) and a lower layer dielectric substrate (2) jointed together. The double-row moment S-shaped pole antenna also comprises double-row moment S-shaped resonance structures (3) and a composite pole antenna (4), wherein the double-row moment S-shaped resonance structures (3) are symmetrically fixed on two sides of the tail end of the composite pole antenna (4); and the composite pole antenna (4) is connected with each double-row moment S-shaped resonance structure (3) through metal strips (5). According to the combination of the double-row moment S-shaped resonance structures (3) and the composite pole antenna (4), the magnetic permeability can be increased, the electromagnetic wave resonance strength can be enhanced in a specific frequency range, the antenna gain is increased and the return loss is reduced.
Description
Technical field
The invention belongs to the microstrip antenna field, be specifically related to a kind of double square S shape utmost point sub antenna that has.
Background technology
LHM (LHM) is the artificial electromagnetic medium of a kind of novel periodic structure of phase late 1990s appearance.It has dielectric constant
simultaneously and magnetic permeability
all is negative two negative material; Promptly when electromagnetic wave is propagated in this dielectric material; Electric field, magnetic field and wave vector are deferred to lefft-hand rule, so be called as LHM (or claiming negative refractive index material).It has caused in recent years that as a kind of novel artificial electromagnetic material people study interest greatly.As far back as nineteen sixty-eight, V.G.V eselageo has just studied the unusual electromagnet phenomenon among the LHM theoretically; People such as smith in 2000 have produced the negative index medium of microwave section first in the laboratory.The unusual electromagnetic property of LHM has represented it in the potential significant application value of light and electromagnetic wave field.
Microstrip antenna is the one type of new antenna that grows up gradually over nearly 30 years.Just propose the notion of microstrip antenna as far back as nineteen fifty-three, but do not caused the attention of engineering circle.Have only some fragmentary researchs in the fifties and the sixties, real development and use are in the seventies.One type of microstrip antenna commonly used is on a thin-medium base (pressing layer like the polytetrafluoroethylene glass fiber); One side is enclosed thin metal layer as ground plate; Another side is made the metal patch of definite shape with methods such as photoetching corrosions; Utilize microstrip line and axis probe to the paster feed, this has just constituted microstrip antenna.When paster is a surface elemant, claim that it is a microstrip antenna; If paster is that an elongated strip then is called the microstrip array sub antenna.
Non-LHM complex poles sub antenna, gain low, frequency band is narrow, reflection coefficient is high, return loss is high, so antenna performance performance is poor, a little less than the antijamming capability, scope of application ten minutes limited.And because the interior requirement to antenna of particular frequency range is different, so the structure of antenna also there are differences, just under CF, the gain of enhance antenna reduces its return loss to the object of the invention.
Summary of the invention
The present invention mainly provides a kind of double square S shape utmost point sub antenna; In particular frequency range, can add the strong electromagnetic wave strength of resonance greatly; Make this structure be significantly improved to the localization degree of electromagnetic energy, antenna gain obviously increases, and shows as lower return loss.
Realize technical scheme of the present invention: a kind of double square S shape utmost point sub antenna; Comprise upper layer medium substrate, layer dielectric substrate, complex poles sub antenna, double square S shape resonance structure and bonding jumper; The front of the back side of said upper layer medium substrate and layer dielectric substrate fits together, and said complex poles sub antenna is a strip structure, is divided into front end, middle-end and end; Be installed on said upper layer medium substrate transversal centerline place, and its length is less than the length of said upper layer medium substrate; The both sides that are fixed on said complex poles sub antenna end of said double square S shape resonance structure symmetry, 3 of every sides, its distance with said complex poles sub antenna equates; , said complex poles sub antenna links to each other with each double square S shape resonance structure through bonding jumper; The layer of metal ground plate is installed at the back side of said layer dielectric substrate.
Further; Said double square S shape resonance structure is formed by two identical single square S shape resonance structures side by side; Arbitrary single square S shape resonance structure is made up of a S shape split ring U-shaped split ring identical with two; Said two U-shaped split rings lay respectively in the opening of said S shape split ring, and the opening direction of its opening direction and said S shape split ring is relative.
Further, the end of said complex poles sub antenna and said upper layer medium substrate have certain intervals.
Further, the length of said upper layer medium substrate and layer dielectric substrate is identical respectively with width, and the thickness of upper layer medium substrate is less than the thickness of layer dielectric substrate.
Further, the relative dielectric constant of said upper layer medium substrate is less than the relative dielectric constant of layer dielectric substrate.
The invention has the beneficial effects as follows: adopt the combination of double square S shape resonance structure and complex poles sub antenna can increase magnetic permeability; Bonding jumper has increased the dielectric constant of antenna medium; Therefore double square S shape is extremely sub can add the strong electromagnetic wave strength of resonance greatly in the frequency particular range; Make this structure be significantly improved to the localization degree of electromagnetic energy, antenna gain obviously increases, and return loss is lower.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain:
Fig. 1 is the double square S of a present invention shape utmost point sub antenna superstructure sketch map;
Fig. 2 is the double square S of a present invention shape utmost point sub antenna understructure sketch map;
Fig. 3 is the double square S of the double square S of a present invention shape utmost point sub antenna shape resonance structure sketch map;
Fig. 4 is the S11 figure of the double square S of the present invention shape utmost point sub antenna;
Fig. 5 is the standing-wave ratio of the double square S of the present invention shape utmost point sub antenna;
Fig. 6 is the reflection coefficient of the double square S of the present invention shape utmost point sub antenna;
Fig. 7 is the gain sketch map of the double square S of the present invention shape utmost point sub antenna.
Among the figure: 1-upper layer medium substrate, 2-layer dielectric substrate, the double square S of 3-shape resonance structure, 4-complex poles sub antenna, 5-bonding jumper.
Embodiment
Be illustrated in figure 1 as the superstructure of double square S shape utmost point sub antenna.The size of upper layer medium substrate 1 is H1 (18mm) * L1 (60mm) * D1 (1mm), and the relative dielectric constant of upper layer medium substrate 1 is 2.2, and complex poles sub antenna 4 is positioned at the horizontal midline of upper layer medium substrate 1; Complex poles sub antenna 4 is the strip structure, is divided into front end, middle-end and end, its front end length L2=16mm; Width H2=1.4mm, middle-end length L 3=26mm, width H3=0.8mm; Tip length L2=16mm, width H2=1.4mm.Six groups of double square S of periodic arrangement of the distribution of the terminal two-layer symmetry of complex poles sub antenna 4 shape resonance structure 3, three groups of every sides, every group has double square S shape resonance structure 3, and links to each other with the end of complex poles sub antenna 4 through bonding jumper 5.The length L 5=7.5mm of each bonding jumper 5, width H4=0.5mm, double square S shape resonance structure 3 is L4=0.9mm to the distance of bonding jumper 5.
Be illustrated in figure 2 as understructure.The size of layer dielectric substrate 2 is H1 (18mm) * L1 (60mm) * D1 (2mm), and the relative dielectric constant of medium substrate is 10, covers a metal ground plate at medium substrate 2 back sides.The front of the back side of upper layer medium substrate 1 and layer dielectric substrate 2 fits together, and forms the structure of double square S shape utmost point sub antenna.
As shown in Figure 3, each double square S shape resonance structure 3 forms by two identical single square S shape resonance structures side by side, and arbitrary single square S shape resonance structure is made up of a S shape split ring and two U-shaped split rings.The wide of S shape split ring is H5=1.4mm, and long is L6=3.1mm; The wide of each U-shaped split ring is H6=0.9mm, and long is L7=0.9mm, and the U-shaped split ring places the opening part of S shape split ring, and the opening direction of the opening direction of U-shaped split ring and S shape split ring is relative.
The present invention adopts Finite-Difference Time-Domain Method to study the performance of double square S shape utmost point sub antenna; Obtain corresponding performance parameter through simulation analysis, the effective dielectric constant and the effective permeability of double square S shape utmost point sub antenna equivalence left-handed medium adopt the NRW method from the S parameter, to extract.
As shown in Figure 4, obtain return loss s11 characteristic through FDTD Electromagnetic Simulation software emulation, s11 is about-18.4214dB in the minimum echo loss of frequency 4.59546GHz place, explains that double square S shape resonance structure can further reduce return loss.
As shown in Figure 5, antenna is 1.27255 in the standing-wave ratio at frequency 4.59546GHz place, explains that double square S shape resonance structure can reduce the signal launch loss.
As shown in Figure 6, antenna is 0.119931 at the reflection coefficient at frequency 4.59546GHz place, explains that double square S shape resonance structure can effectively reduce reflected wave, makes the aerial radiation more energy.
As shown in Figure 7, obtain antenna gain characteristics, double square S shape utmost point sub antenna forward gain maximum when frequency f=150GHz is about 5.25776dB, and the gain that double square S shape resonance structure can bigger raising paster antenna is described.
Through analyzing; Find near the double square S shape utmost point sub antenna resonances that the f=4.59546GHz frequency, generate electromagnetic waves; The real part that dielectric constant and magnetic permeability occur is negative value simultaneously, and its refractive index also is a negative value, has strengthened the electromagnetic wave strength of resonance greatly; Make double square S shape structure be significantly improved to the localization degree of electromagnetic energy, antenna gain obviously increases and shows as lower return loss.Therefore, double square S shape utmost point sub antenna has increased antenna and has been coupled to the electromagenetic wave radiation power in space, thereby has improved paster antenna gain and signal to noise ratio, has improved the performance of antenna preferably.
Preferably in frequency is the scope of 4.59546GHz ± 100MHz, using of the utmost point sub antenna of present embodiment, its increase that gain, return loss reduction.Certainly the size equal proportion with present embodiment changes, and can also obtain the effect of the utmost point sub antenna of other frequency ranges, also belongs to protection scope of the present invention.
Claims (5)
1. double square S shape utmost point sub antenna; Comprise upper layer medium substrate (1), layer dielectric substrate (2) and complex poles sub antenna (4); The front of the back side of said upper layer medium substrate (1) and layer dielectric substrate (2) fits together; It is characterized in that: also comprise double square S shape resonance structure (3), said complex poles sub antenna (4) is a strip structure, is divided into front end, middle-end and end; Be installed on said upper layer medium substrate (1) transversal centerline place, and its length is less than the length of said upper layer medium substrate (1); The both sides that are fixed on said complex poles sub antenna (4) end of said double square S shape resonance structure (3) symmetry, 3 of every sides, its distance with said complex poles sub antenna (4) equates; Said complex poles sub antenna (4) links to each other with each double square S shape resonance structure (3) through bonding jumper (5); The layer of metal ground plate is installed at the back side of said layer dielectric substrate (2).
2. a kind of double square S shape utmost point sub antenna according to claim 1; It is characterized in that: said double square S shape resonance structure (3) is formed by two identical single square S shape resonance structures side by side; Arbitrary single square S shape resonance structure is made up of a S shape split ring U-shaped split ring identical with two; Said two U-shaped split rings lay respectively in the opening of said S shape split ring, and the opening direction of its opening direction and said S shape split ring is relative.
3. a kind of double square S shape utmost point sub antenna according to claim 1, it is characterized in that: there is certain intervals at the edge of the end of said complex poles sub antenna (4) and said upper layer medium substrate (1).
4. a kind of double square S shape utmost point sub antenna according to claim 1; It is characterized in that: the length of said upper layer medium substrate (1) and layer dielectric substrate (2) is identical respectively with width, and the thickness of upper layer medium substrate (1) is less than the thickness of layer dielectric substrate (2).
5. a kind of double square S shape utmost point sub antenna according to claim 1, it is characterized in that: the relative dielectric constant of said upper layer medium substrate (1) is less than the relative dielectric constant of layer dielectric substrate (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110319017.XA CN102509856B (en) | 2011-10-20 | 2011-10-20 | Double-row moment S-shaped pole antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110319017.XA CN102509856B (en) | 2011-10-20 | 2011-10-20 | Double-row moment S-shaped pole antenna |
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| CN102509856A true CN102509856A (en) | 2012-06-20 |
| CN102509856B CN102509856B (en) | 2014-02-12 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976759A (en) * | 2010-09-07 | 2011-02-16 | 江苏大学 | Equivalent LHM (Left Handed Material) patch antenna of split ring resonators |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976759A (en) * | 2010-09-07 | 2011-02-16 | 江苏大学 | Equivalent LHM (Left Handed Material) patch antenna of split ring resonators |
Non-Patent Citations (3)
| Title |
|---|
| D. BUDIMIR ET AL: "Metawaveguide Resonator Structures for Millimetre Wave Application", 《 MM-WAVE PRODUCTS AND TECHNOLOGIES，2006. THE INSTITUTION OF ENGINEERING AND TECHNOLOGY SEMINAR ON》 * |
| 常树茂: "基于左手材料的复合单极子天线研究", 《西安邮电学院学报》 * |
| 黄明: "左手材料物理特性在微带天线中的应用", 《中国硕士学位论文库》 * |
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| CN102509856B (en) | 2014-02-12 |
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