CN203983490U - A kind of new ideas Broadband circularly polarized antenna - Google Patents
A kind of new ideas Broadband circularly polarized antenna Download PDFInfo
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- CN203983490U CN203983490U CN201420382027.7U CN201420382027U CN203983490U CN 203983490 U CN203983490 U CN 203983490U CN 201420382027 U CN201420382027 U CN 201420382027U CN 203983490 U CN203983490 U CN 203983490U
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- microstrip line
- medium substrate
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- circularly polarized
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Abstract
The utility model discloses a kind of new ideas Broadband circularly polarized antenna, feeder line is connected with antenna radiation unit, antenna radiation unit is etched on medium substrate, medium substrate is horizontally fixed on the top of reflecting plate by supporting construction, antenna radiation unit comprises two bending oscillators, two parasitic elements, coplanar microstrip line and T-shaped feed microstrip line structure, two bending oscillators, two parasitic elements and coplanar microstrip line are etched in the back side of medium substrate, described T-shaped feed microstrip line etch structures is in the front of medium substrate, described two bending oscillators are about medium substrate Central Symmetry, coplanar microstrip line is arranged on the axis of medium substrate, by two coplanar microstrip lines of wide seam and narrow slit microstrip line, formed, two coplanar microstrip lines of wide seam are given respectively two bending oscillator feeds, bending oscillator by non-central feed motivates circularly polarised wave, Broadband circularly polarized antenna is novel and simple whole plane structure, be convenient to machine-shaping.
Description
Technical field
The utility model relates to microwave technical field, particularly a kind of new ideas Broadband circularly polarized antenna.
Background technology
The application of circular polarized antenna in wireless communication system more and more receives people's concern, because circular polarized antenna not only can reduce the incoming wave that multipath effect can also receive any polarization, directed circular polarized antenna can either provide very high fail safe simultaneously, can improve the utilance of channel simultaneously.In addition, if antenna radiation left-hand circular polarization ripple receives only left-hand circular polarization ripple and does not receive right-handed circular polarization ripple; Vice versa, and this is called the rotation direction orthogonality of circular polarized antenna, can utilize the rotation direction orthogonality of circular polarized antenna to improve message capacity in the polarization diversity work of mobile communication.When circularly polarised wave incides symmetrical target (as plane, sphere etc.), rotation direction takes a turn for the worse, and circular polarized antenna is applied to can suppress misty rain interference and anti-multipath reflection in mobile communication, realizes channeling, increases power system capacity, improves communication quality.
The design of current circular polarized antenna mainly contains two kinds of methods: a kind of is helical antenna based on row ripple; Be based on a quadrature oscillator, make two current amplitude equal phase above oscillator differ 90 degree, thus radiation circularly polarised wave.But be all three-dimensional as the circular polarized antenna of the such row ripple type of helical antenna, take volume larger, be unfavorable for the system integration, the antenna pattern of the helical antenna of plane is all bidirectional radiation, gain also can be very low.The circular polarized antenna of quadrature Harmonic Oscillators generally all needs external match circuit, or duplex feeding form, and complex structure is difficult to make.Circularly polarization microstrip patch antenna is subject to medium sheet material thickness limits, limited bandwidth, and conventionally the single layer microstrip beamwidth of antenna is less than 5%, even if adopt the micro-band plate of a lot of layer stacking, also can only broadening finite bandwidth, so also limited the range of application of antenna.
In order to obtain broadband circle polarized directional antenna, designer has proposed a variety of schemes and has realized.Adopting the feeding classification of slot-coupled, and be the stacked form of the micro-band plate of multilayer, is a kind of a kind of method of conventional Bandwidth.But this method complex structure, volume is very large, and manufacture craft requires high.Useful L-type probe coupling feed also, but this method generally all needs additional match circuit, and be all generally duplex feeding form, complex structure, cost of manufacture is high.
Comprehensively it seems that current existing Broadband circularly polarized antenna technology is difficult to all realize good performance at Fixed width frequency band and whole plane three aspects:
Utility model content
The shortcoming and deficiency that in order to overcome prior art, exist, the utility model provides a kind of new ideas Broadband circularly polarized antenna.
The utility model adopts following technical scheme:
A kind of new ideas Broadband circularly polarized antenna, comprise antenna radiation unit, medium substrate, reflecting plate and feeder line, described feeder line is connected with antenna radiation unit, described antenna radiation unit is etched on medium substrate, described medium substrate is horizontally fixed on the top of reflecting plate by supporting construction, described antenna radiation unit comprises two bending oscillators, two parasitic elements, coplanar microstrip line and T-shaped feed microstrip line structure, described two bending oscillators, two parasitic elements and coplanar microstrip line are etched in the back side of medium substrate, described T-shaped feed microstrip line etch structures is in the front of medium substrate, described two bending oscillators are about medium substrate Central Symmetry, described coplanar microstrip line is arranged on the axis of medium substrate, by two coplanar microstrip lines of wide seam and narrow slit microstrip line, formed, described two coplanar microstrip lines of wide seam are given respectively two bending oscillator feeds, described bending oscillator is non-apex drive structure.
The angle of bend of described bending oscillator is 70-100 degree, the length of described bending oscillator is 0.6 λ～1 λ, specifically comprise bending oscillator horizontal component and bending oscillator vertical component, the length of described bending oscillator horizontal component is 0.6-1.4 with the Length Ratio of bending oscillator vertical component, and wherein λ is the corresponding wavelength of frequency 2.2GHz in medium substrate.
Parasitic element, below described bending oscillator horizontal component, and is connected with the coplanar microstrip line of wide seam, strengthens the impedance bandwidth of antenna by coupling.
Described T-shaped feed microstrip line structure is rotated counterclockwise 90 degree and is etched on the coplanar microstrip line of narrow slit, and its vertical component is across the two ends, gap of the coplanar microstrip line of narrow slit.
Described supporting construction is made by insulating material, and the height of supporting construction is 0.1 λ～0.5 λ, and wherein, λ is wavelength corresponding to free space frequency 2.2GHz.
Characteristic impedance 180 Ω～220 Ω of the coplanar microstrip line of described wide seam, characteristic impedance 80 Ω～120 Ω of the coplanar microstrip line of described narrow slit.
Also comprise a nonmetal via hole, described nonmetal via hole is opened on the coplanar microstrip line of narrow slit, and be positioned at the lower end of the vertical component of described T-shaped feed microstrip line structure, described feeder line is soft coaxial line, the inner core of feeder line is through the T-shaped microstrip line welding in non-metallic through hole and dielectric-slab front, and the coplanar microstrip line of the unfaithful intention of feeder line and narrow slit welds.
The beneficial effects of the utility model:
(1) the utlity model has the simple structure of whole plane, simple for production;
(2) antenna radiation unit of the present utility model adopts the bending oscillator of non-central feed, and the part that is conducive to two quadratures of oscillator motivates the surface current that amplitude equal phase differs 90 degree, thereby can make antenna excitation go out circularly polarised wave;
(3) below the horizontal component at bending oscillator, increase parasitic element, by coupling, strengthen the bandwidth of antenna;
(4) the utility model novel structure, antenna structure is symmetrical, and feed structure is simple, the simple and whole plane structure of antenna structure, building block is convenient to machine-shaping less, has broadband, high-gain, the characteristic of one-way radiation.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of new ideas Broadband circularly polarized antenna;
Fig. 2 is the structure chart of antenna radiation unit in Fig. 1;
Fig. 3 is the end view of Fig. 1;
Fig. 4 is the impedance bandwidth figure of the utility model embodiment;
Fig. 5 is the axial ratio bandwidth figure of the utility model embodiment;
Fig. 6 (a) be the utility model embodiment at the antenna pattern of 1.7GHz phi=0 direction, the antenna pattern of Fig. 6 (b) 1.7GHz phi=90 degree direction;
Fig. 7 (a) be the utility model embodiment at the antenna pattern of 2.4GHz phi=0 degree direction, the antenna pattern of Fig. 7 (b) 2.4GHz phi=90 degree direction;
Fig. 8 (a) the utility model embodiment is at the antenna pattern of 3GHz phi=0 degree direction, and Fig. 8 (b) the utility model embodiment is at the antenna pattern of 3GHz phi=90 degree direction.
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
As Fig. 1, shown in Fig. 2, a kind of new ideas Broadband circularly polarized antenna, comprise antenna radiation unit, medium substrate 12, reflecting plate 2 and feeder line 3, described feeder line 3 is connected with antenna radiation unit, described antenna radiation unit is etched on medium substrate 12, described medium substrate 12 is horizontally fixed on the top of reflecting plate by supporting construction 4, described supporting construction 4 has insulating material to make, be highly 0.1 λ～0.5 λ, wherein, λ is wavelength corresponding to free space frequency 2.2GHz, the height of described supporting construction depends on the distance of antenna radiation unit and reflecting plate 2, material can be selected plastics or wooden stick, the present embodiment supporting construction comprises four wooden sticks, lay respectively at four angles of medium substrate, the height of wooden stick is 41mm.
Described antenna radiation unit comprises two bending oscillators, two parasitic elements 7, 7A, coplanar microstrip line and T-shaped feed microstrip line structure 10, described two bending oscillators, two parasitic elements 7, 7A and coplanar microstrip line are etched in the back side of medium substrate 12, described T-shaped feed microstrip line structure 10 is etched in the front of medium substrate 12, the present embodiment medium substrate 12 adopts high frequency sheet material RO4350B, thickness 0.76mm, relative dielectric constant 3.48, described two bending oscillators are about medium substrate 12 Central Symmetries, described coplanar microstrip line is arranged on the axis of medium substrate, by two coplanar microstrip lines 8 of wide seam and narrow slit microstrip line 9, formed, described two coplanar microstrip lines of wide seam are given respectively two bending oscillator feeds, described bending oscillator is non-central feed oscillator, coplanar microstrip line 8 characteristic impedance 180 Ω～220 Ω of described wide seam, characteristic impedance 80 Ω～120 Ω of the coplanar microstrip line 9 of described narrow slit, thereby realize the impedance matching of antenna.
Described two parasitic elements are arranged on respectively the below of the horizontal component of two bending oscillators, and are connected with the coplanar microstrip line of wide seam, strengthen the impedance bandwidth of antenna by coupling.
Structure and the angle of bend of described two bending oscillators are identical, the angle of bend of described bending oscillator is 70-100 degree, be preferably 90 degree, the length of bending oscillator is for being 0.6 λ～1 λ, described bending oscillator comprises horizontal component and vertical component, two horizontal components 6, 6A respectively with two vertical components 5, 5A is quadrature spatially, the horizontal component of described bending oscillator and vertical component spatially form quadrature, by the horizontal component at oscillator and vertical component, motivate the surface current that amplitude equal phase differs 90 degree, bending oscillator excitation by non-central feed obtains circularly polarised wave.
Two bending oscillators are placed about medium substrate Central Symmetry, the length of described horizontal component and the Length Ratio of vertical component are 0.6-1.4, wherein λ is the corresponding wavelength of frequency 2.2GHz in medium substrate, the center that the distributing point of two bending oscillators all departs from oscillator, the distributing point that the coplanar microstrip line of wide seam connects oscillator provides excitation to oscillator.
Described T-shaped feed microstrip line structure 10 is etched in the front of medium substrate, the characteristic impedance of described T-shaped feed microstrip line structure is 40 Ω～50 Ω, described T-shaped feed microstrip line structure is rotated counterclockwise 90 degree and places, T-shaped micro-band vertical component is connected across between the coplanar microstrip line of narrow slit, microstrip line length range 0.1 λ～0.3 λ of the horizontal component of T-shaped microstrip line, wherein λ is the corresponding wavelength of frequency 2.2GHz in medium substrate, microstrip line length range 0.05～0.2 λ of the vertical component of T-shaped microstrip line, wherein λ is the corresponding wavelength of frequency 2.2GHz in medium substrate.
As shown in Figure 3, the utility model adopts a feeder line 3 to antenna feed, feeder line can be soft coaxial or hard coaxial etc., this example adopts soft coaxial, the utility model also comprises a nonmetal via hole 11, described nonmetal via hole 11 is opened on the coplanar microstrip line of narrow slit, and be positioned at the lower end of the vertical component of described T-shaped feed microstrip line structure, the feeder line of the present embodiment is selected soft coaxial line, the inner core of described feeder line is the T-shaped microstrip line welding with dielectric-slab front through non-metallic through hole 11, coplanar microstrip line 9 welding of unfaithful intention and narrow slit, this antenna only needs a pad, reflecting plate 2 is simple rectangle metallic plates.
The utility model only just can be realized circular polarization with the oscillator of two bendings, adopt coplanar microstrip line to bending oscillator feed, whole antenna full symmetric, as shown in Fig. 4, Fig. 5, Fig. 6 (a), Fig. 6 (b), Fig. 7 (a), Fig. 7 (b), Fig. 8 (a) and Fig. 8 (b), impedance bandwidth can cover the broadband (return loss≤15dB) of 1700-3000MHz, and axial ratio bandwidth can cover the broadband (axial ratio≤3dB) of 1690-3000MHz.Because antenna structure is symmetrical, so antenna pattern is symmetrical, and obtained very high gain characteristic, this newtype Broadband circularly polarized antenna covers the frequency range of current mobile communication completely.
Antenna adopts T-shaped feed microstrip line structure to carry out feed, makes antenna obtain good impedance bandwidth, and the width of T-shaped microstrip line is 1.7mm, characteristic of correspondence impedance 50 Ω.
The utlity model has the simple structure of whole plane, make simply, method for designing innovation, impedance bandwidth and axial ratio bandwidth are all very large, and the gain of antenna is high, and antenna pattern is symmetrical.
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 (8)
1. a new ideas Broadband circularly polarized antenna, comprise antenna radiation unit, medium substrate, reflecting plate and feeder line, described feeder line is connected with antenna radiation unit, described antenna radiation unit is etched on medium substrate, it is characterized in that, described medium substrate is horizontally fixed on the top of reflecting plate by supporting construction, described antenna radiation unit comprises two bending oscillators, two parasitic elements, coplanar microstrip line and T-shaped feed microstrip line structure, described two bending oscillators, two parasitic elements and coplanar microstrip line are etched in the back side of medium substrate, described T-shaped feed microstrip line etch structures is in the front of medium substrate, described two bending oscillators are about medium substrate Central Symmetry, described coplanar microstrip line is arranged on the axis of medium substrate, by two coplanar microstrip lines of wide seam and narrow slit microstrip line, formed, described two coplanar microstrip lines of wide seam are given respectively two bending oscillator feeds, described bending oscillator is non-apex drive structure.
2. a kind of new ideas Broadband circularly polarized antenna according to claim 1, it is characterized in that, the angle of bend of described bending oscillator is 70-100 degree, the length of described bending oscillator is 0.6 λ～1 λ, specifically comprise bending oscillator horizontal component and bending oscillator vertical component, the length of described bending oscillator horizontal component is 0.6-1.4 with the Length Ratio of bending oscillator vertical component, and wherein λ is the corresponding wavelength of frequency 2.2GHz in medium substrate.
3. a kind of new ideas Broadband circularly polarized antenna according to claim 2, is characterized in that, parasitic element, below described bending oscillator horizontal component, and is connected with the coplanar microstrip line of wide seam.
4. a kind of new ideas Broadband circularly polarized antenna according to claim 1, is characterized in that, described T-shaped feed microstrip line structure is rotated counterclockwise 90 degree and is etched on the coplanar microstrip line of narrow slit, and its vertical component is across the two ends, gap of the coplanar microstrip line of narrow slit.
5. a kind of new ideas Broadband circularly polarized antenna according to claim 1, is characterized in that, described supporting construction is made by insulating material, and the height of supporting construction is 0.1 λ～0.5 λ, and wherein, λ is wavelength corresponding to free space frequency 2.2GHz.
6. a kind of new ideas Broadband circularly polarized antenna according to claim 1, is characterized in that, characteristic impedance 180 Ω～220 Ω of the coplanar microstrip line of described wide seam, characteristic impedance 80 Ω～120 Ω of the coplanar microstrip line of described narrow slit.
7. a kind of new ideas Broadband circularly polarized antenna according to claim 1, is characterized in that, also comprises a nonmetal via hole, and described nonmetal via hole is opened on the coplanar microstrip line of narrow slit, and is positioned at the lower end of the vertical component of described T-shaped feed microstrip line structure.
8. a kind of new ideas Broadband circularly polarized antenna according to claim 1, it is characterized in that, described feeder line is soft coaxial line, and the inner core of feeder line is through the T-shaped microstrip line welding in non-metallic through hole and dielectric-slab front, and the coplanar microstrip line of the unfaithful intention of feeder line and narrow slit welds.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420382027.7U CN203983490U (en) | 2014-07-10 | 2014-07-10 | A kind of new ideas Broadband circularly polarized antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420382027.7U CN203983490U (en) | 2014-07-10 | 2014-07-10 | A kind of new ideas Broadband circularly polarized antenna |
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| CN203983490U true CN203983490U (en) | 2014-12-03 |
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| CN201420382027.7U Expired - Fee Related CN203983490U (en) | 2014-07-10 | 2014-07-10 | A kind of new ideas Broadband circularly polarized antenna |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157968A (en) * | 2014-07-10 | 2014-11-19 | 华南理工大学 | New concept broadband circularly polarized antenna |
| CN104934713A (en) * | 2015-04-28 | 2015-09-23 | 四川省韬光通信有限公司 | High-gain broadband coupling slot wing-shaped microstrip antenna |
| CN105428818A (en) * | 2015-12-18 | 2016-03-23 | 华南理工大学 | Dual-polarized bandwidth slot antenna applying U-shaped microstrip feed |
| CN106450723A (en) * | 2016-09-27 | 2017-02-22 | 华南理工大学 | Differential feeding structure suitable for broadband planar dipole antenna and differential feeding method |
| CN106816691A (en) * | 2016-12-26 | 2017-06-09 | 上海交通大学 | The broadband circle polarized Compound Water diectric antenna of miniaturization low section of uhf band |
| CN108448246A (en) * | 2018-05-21 | 2018-08-24 | 华南理工大学 | A kind of differential feed directional diagram reconstructable aerial |
| CN108493572A (en) * | 2018-02-28 | 2018-09-04 | 哈尔滨工程大学 | A kind of orientation circular polarized antenna based on bending T shape rotational structures |
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2014
- 2014-07-10 CN CN201420382027.7U patent/CN203983490U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157968A (en) * | 2014-07-10 | 2014-11-19 | 华南理工大学 | New concept broadband circularly polarized antenna |
| CN104157968B (en) * | 2014-07-10 | 2017-04-19 | 华南理工大学 | New concept broadband circularly polarized antenna |
| CN104934713A (en) * | 2015-04-28 | 2015-09-23 | 四川省韬光通信有限公司 | High-gain broadband coupling slot wing-shaped microstrip antenna |
| CN105428818A (en) * | 2015-12-18 | 2016-03-23 | 华南理工大学 | Dual-polarized bandwidth slot antenna applying U-shaped microstrip feed |
| CN106450723A (en) * | 2016-09-27 | 2017-02-22 | 华南理工大学 | Differential feeding structure suitable for broadband planar dipole antenna and differential feeding method |
| CN106816691A (en) * | 2016-12-26 | 2017-06-09 | 上海交通大学 | The broadband circle polarized Compound Water diectric antenna of miniaturization low section of uhf band |
| CN108493572A (en) * | 2018-02-28 | 2018-09-04 | 哈尔滨工程大学 | A kind of orientation circular polarized antenna based on bending T shape rotational structures |
| CN108448246A (en) * | 2018-05-21 | 2018-08-24 | 华南理工大学 | A kind of differential feed directional diagram reconstructable aerial |
| CN108448246B (en) * | 2018-05-21 | 2023-08-22 | 华南理工大学 | Differential feed pattern reconfigurable antenna |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20180710 |
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| CF01 | Termination of patent right due to non-payment of annual fee |