CN101291014B - Multi-resonant broadband antenna - Google Patents
Multi-resonant broadband antenna Download PDFInfo
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- CN101291014B CN101291014B CN2007103061562A CN200710306156A CN101291014B CN 101291014 B CN101291014 B CN 101291014B CN 2007103061562 A CN2007103061562 A CN 2007103061562A CN 200710306156 A CN200710306156 A CN 200710306156A CN 101291014 B CN101291014 B CN 101291014B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
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Abstract
A multi-resonant broadband antenna constructed with a dielectric substrate; a fractal radiation element having a predetermined fractal grid structure adhered on an upper surface of the dielectric substrate. A feed line adhered on the upper surface of the dielectric substrate feeds the fractal radiation element, and a ground plane positioned on a lower surface of the dielectric substrate opposite to the feed line, is physically separated by the dielectric substrate from the feed line.
Description
Priority request
The application according to 35U.S.C 119 with reference to, incorporate and require the ownership equity of the application that is entitled as multi-resonant broadband antenna that this forward direction Korea S Department of Intellectual Property submits at this, these applications be respectively submitted on April 16th, 2007 and Allotment Serial Number be No.10-2007-0037160, submitted on May 30th, 2007 and Allotment Serial Number be No.10-2007-0052930, and submitted on May 30th, 2007 and Allotment Serial Number be No.10-2007-0052929.
Technical field
The present invention relates to a kind of multi-resonant broadband antenna for multiband, more particularly, relate to the multi-resonant broadband antenna with fractal structure.
Background technology
The example of at present used multiband antenna comprises planar inverted F-shape antenna (PIFA), and it has as the meander line structural antenna of radiant element or stacked type paster antenna.Conventional PIFA can be configured on the connection of antenna ground with reversed F-typed, and be divided into feeder line and with the radiant element of the PIFA short-circuit from the short circuit of connection of antenna ground, the resonance characteristic that it shows depends on the spacing of feeder line and short-circuit, and the shape of feeder line and short-circuit.In order to realize the multi resonant characteristic of shaking in PIFA, the radiant element on the PIFA is divided into a plurality of parts with different size, then combines.In other words, several antennas with single band characteristic are used in combination.PIFA can realize having the small size antenna of multiband characteristic.If but several antenna by the PIFA textural association together, the radiation efficiency of antenna and gain will sharply reduce.Therefore, PIFA is not suitable for use in producing three resonance or the multiband antenna that shakes of multi resonant more.
When the meander line structure was used as the radiant element of antenna, the characteristic that resulting antenna shows was similar to PIFA.In other words, in general, PIFA, tortuous linear antenna and the antenna with several single band characteristics usually combine to obtain small-sized multiband antenna.If but the small-sized multiband antenna that obtains like this shows the multi resonant characteristic of shaking, the radiation efficiency of small multi-frequency section antenna will sharply worsen so.Therefore, if this small-sized multiband antenna is as producing three resonance or the multiple-resonant antenna that shakes of multi resonant more, then the performance of small-sized multiband antenna can go wrong.
In addition, use the multiple-resonant antenna of stacked type patch-antenna structure to comprise the radiant element that has different size and be arranged above and below.Correspondingly, the size of multiple-resonant antenna can increase.Therefore, similar with PIFA described above and tortuous linear antenna, because structure limits, multiple-resonant antenna is not suitable for use in producing three resonance or the multiband antenna that shakes of multi resonant more.
The unipole antenna of modern designs adopts Hilbert (Hilbert) grid structure, and it has the multiband frequency characteristic; But its formed resonance frequency band is narrow.In addition, little if unipole antenna is done, then resonance frequency band can become narrower, and the efficient of unipole antenna can reduce.In addition, also have the technical limitations of puzzlement unipole antenna design, this can limit its suitable application in particular band.
Summary of the invention
The object of the present invention is to provide the modified model antenna.
Another purpose is that the multi resonant characteristic of shaking is provided in planar inverted F-shape antenna.
A purpose provides and produces three resonance or the small-sized multiband antenna that shakes of multi resonant more again.
Also a purpose provides and produces three resonance or small-sized multiband antenna that more multi resonant shakes, operating characteristic strengthens.
Another purpose provides small-sized, the multiple-resonant antenna that demonstrates the return loss of improvement in broadband.
Further purpose provides the antenna with the fractal grid structure that shows multiband.
These purposes and other purpose can obtain with microcell antenna, and this microcell antenna adopts the fractal radiant element of the special pattern with fractal grid structure, and it shows multiband and broadband character.
The embodiment of principle of the present invention also provides the broadband that comprises short-circuit, efficient antenna, and stacking in the short-circuit have fractal radiant element and fractal parasitic radiation element, and form conductive path between fractal radiant element and fractal parasitic radiation element.
According to aspects of the present invention, multi-resonant broadband antenna with medium substrate, fractal radiant element, feeder line and antenna ground surface construction is provided, wherein fractal radiant element is bonded on the upper surface of medium substrate and has predetermined fractal grid structure, feeder line is bonded on the upper surface of medium substrate and to fractal radiant element feed, and connection of antenna ground is positioned on the lower surface of medium substrate with relative with feeder line.Thereby, by medium substrate connection of antenna ground is physically separated with feeder line.
The fractal pattern structure that forms fractal radiant element can be formed closed electric continuous loop, also can form around feeder line symmetric arrays ground, perhaps alternatively, be formed the electrical aperture structure, and near-end of fractal pattern is electrically coupled to feeder line, and one or more far-end of fractal pattern and other parts physical separation and the electrical separation of feeder line and fractal pattern.
Details of the present invention and improvement are open in detail in following description and appended claims.
Description of drawings
By with reference to following detailed description together with accompanying drawing, will be easy to more completely understand and understand better the present invention and a plurality of advantage of the present invention, similar reference marker is indicated same or analogous element in the accompanying drawing, wherein:
Fig. 1 is the oblique view that modern planar reverse F-shaped antenna structure is shown;
Fig. 2 is the plane graph that modern meander line structural antenna is shown;
Fig. 3 and Fig. 4 illustrate respectively plane graph and the sectional view of the modern unipole antenna with Hilbert grid structure;
Fig. 5 illustrates unipole antenna shown in Fig. 3 and Fig. 4 with two coordinate diagram of the variation of the return loss of decibelmeter;
Fig. 6 is the front view according to the multi-resonant broadband antenna of the fractal radiant element of use of an embodiment structure of principle of the present invention;
Fig. 7 is the end view of multi-resonant broadband antenna shown in Figure 6;
Fig. 8 is another embodiment according to principle of the present invention, uses the end view of the multi-resonant broadband antenna of fractal radiant element and fractal parasitic radiation element;
Fig. 9 is another embodiment according to principle of the present invention, uses the end view of the multi-resonant broadband antenna of fractal radiant element, fractal parasitic radiation element and short-circuit;
Figure 10 is the end view according to the multi-resonant broadband antenna of another embodiment of principle of the present invention;
Figure 11 is the end view according to the multi-resonant broadband antenna of another embodiment of principle of the present invention;
Figure 12 is the end view according to the multi-resonant broadband antenna of another embodiment of principle of the present invention;
Figure 13 is the end view according to the multi-resonant broadband antenna of another embodiment of principle of the present invention;
Figure 14 to Figure 26 illustrates according to principle of the present invention, is configured to the fractal structure pattern of the element of various embodiments;
Figure 27 is the typical multi-resonant broadband antenna for principle of the present invention, illustrates with the return loss of decibelmeter and two coordinate diagram of frequency function relation.
Embodiment
Get back to now figure, the example of the multiband antenna of current use comprises planar inverted F-shape antenna shown in Figure 1 (PIFA), the antenna with meander line structure shown in Figure 2, stacked type paster antenna etc.
The structure of modern PIFA 10 shown in Figure 1 is to be configured to the inverted-F shape at ground plane 11, and is divided into feeder line 13 and short-circuit 14.Short-circuit part 14 makes the radiant element 12 of PIFA 10 from ground plane 11 short circuits, and the resonance characteristic that shows depends on the separation distance of 14 of feeder line 13 and short-circuit and the shape of feeder line 13 and short-circuit 14.For realizing multi resonant among the PIFA 10 characteristic of shaking, the radiant element 12 on the PIFA 10 is divided into the part with different size and then is combined.In other words, be combined the several antennas with single band characteristic of use.PIFA 10 can be embodied as the small size antenna with multiband characteristic.If but with the PIFA structure with several antenna sets altogether, then the radiation efficiency of antenna and gain can sharply reduce.Therefore, PIFA 10 is not suitable for and produces three resonance or the multiband antenna that shakes of multi resonant more.
Fig. 2 illustrates the antenna with meander line structure 15.Here, the characteristic that shows of antenna is similar to PIFA 10 characteristics shown in Figure 1.
In other words, in current practice, PIFA, tortuous linear antenna and several antenna with single band characteristic usually combine to realize physically small-sized multiband antenna.If but the small-sized multiband antenna of realizing like this shows the multi resonant characteristic of shaking, its radiation efficiency can sharply worsen.Thereby if be configured to produce three resonance or the multiple-resonant antenna that shakes of multi resonant more with small-sized multiband antenna, the small-sized multiband antenna radiance that then obtains can go wrong.
In addition, use the multiple-resonant antenna of stacked type patch-antenna structure to comprise the radiant element with different size, and be arranged above and below.The physical size of the multiple-resonant antenna that therefore, obtains can increase.In addition, similar with PIFA described above and tortuous linear antenna, because structure limits, this multiple-resonant antenna is not suitable for use in producing three resonance or the multiband antenna that shakes of multi resonant more.
Fig. 3 and Fig. 4 illustrate plane and the cross sectional elevation of modern unipole antenna, it uses the Hilbert grid structure 16 on the plane surface that is fixed on medium substrate 18, and by the signal driver that is applied on the feeder line 20, and Fig. 5 is that Fig. 3 and unipole antenna shown in Figure 4 are with the schematic diagram of the return loss of decibel tolerance.
Referring to Fig. 3 and Fig. 4, unipole antenna can have the multiband frequency characteristic.As shown in Figure 5, formed resonance frequency band is narrow.In addition, little if unipole antenna is done, then resonance frequency band can correspondingly become narrower, and the efficient of unipole antenna can reduce.In addition, also have the technical limitations of puzzlement unipole antenna design, this can limit its compatibility of using in particular band.
Now, describe with reference to the accompanying drawings preferred embodiment according to principles of construction of the present invention in detail.
Fig. 6 is the front view that uses the multi-resonant broadband antenna of fractal radiant element according to embodiments of the invention, and Fig. 7 is the end view of the multi-resonant broadband antenna of Fig. 6.
As shown in the figure, fractal pattern is coarse or the fragment geometry, and it can be further divided into a plurality of parts, and its each is that approximate at least is that the integral body of size reduction copies.As geometric object, fractal is the self similarity object, is at least approx or randomly, and it has the fine structure of arbitrarily small ratio, to such an extent as to it too irregular can not be with traditional Euclidean geometry language description, and it has the simple recursion definition.
Referring to Fig. 6 and Fig. 7, comprise medium substrate 600 and 700, connection of antenna ground 610 and 710, feeder line 620 and 720 and fractal radiant element 630 and 730 according to the multi-resonant broadband antenna of the embodiment of the invention.
Connection of antenna ground 610 and 710 is positioned on the back of the body surface of medium substrate 600 and 700.Connection of antenna ground 610 and 710 for example determines the plane of reference of feed line impedance as feeding the feeder line 620 of fractal radiant element 630 and 730 and 720 the ground connection plane of reference.
Fractal radiant element 630 and 730 is octagon, is wherein arranging the fractal grid structure of X-shape.Here, fractal structure refers to wherein to have the structure that the minor structure of reservation shape repeats above total.In other words, fractal structure be have expression have identical shaped fragment and whole self-similarity and recursiveness geometry.
Fractal radiant element 630 and 730 whole size can be 40 * 40mm or less.The lip-deep connection of antenna of the back of the body ground 610 and 710 that sticks to medium substrate 600 and 700 forms the exterior face that is made of the conductor in the communication equipment, in described communication equipment radiant element is installed, such as portable phone, and communication terminal etc.Here, except cross shaped head shown in Figure 6, fractal radiant element 630 and 730 also can comprise herringbone, lightning shape, the fractal grid shape of Hilbert and inverted V-shaped.
The fractal grid shape that wherein has X-shape, herringbone, lightning shape or inverted V-shaped be can be used to realize having the antenna of multiband and broadband character by radiant element fractal on dimension and that then line up.Can revise fractal grid shape and array structure to improve radiation efficiency and the broadband character of multi-resonant broadband antenna.
Enlarge the line length of the every cellar area of multi-resonant broadband antenna with amended structure rather than common fractal structure, so that the multi-resonant broadband antenna miniaturization.In addition, when multi-resonant broadband antenna with respect to respective wavelength do during miniaturization, make the radiation efficiency maximization of multi-resonant broadband antenna with amended structure.
Fig. 8 is the end view that uses according to another embodiment of the present invention the multi-resonant broadband antenna of fractal radiant element and fractal parasitic radiation element.Referring to Fig. 8, multi-resonant broadband antenna comprises medium substrate 800, connection of antenna ground 810, feeder line 820, fractal radiant element 830 and fractal parasitic radiation element 840.The multi-resonant broadband antenna of the present embodiment and Fig. 7 difference be, fractal parasitic radiation element 840 is positioned on the back of the body surface of the medium substrate 800 relative with fractal radiant element 830.
Fractal radiant element 830 and fractal parasitic radiation element 840 keep independently characteristic, and independent the existence.Fractal parasitic radiation element 840 is positioned on the back of the body surface of connection of antenna ground 810 residing medium substrates 800.Therefore, from the electric wave of fractal radiant element 830 prompt radiations by fractal parasitic radiation element 840 by again radiation.In other words, if the gap between fractal radiant element 830 and the fractal parasitic radiation element 840 is narrow, then electric wave can be by the again radiation of fractal parasitic radiation element 840, and because the coupling between fractal radiant element 830 and the fractal parasitic radiation element 840, the length of line can prolong.The prolongation of line length helps to improve low-frequency band characteristic, return loss and the gain of multi-resonant broadband antenna, and makes the multi-resonant broadband antenna miniaturization.
Fractal radiant element 830 can have identical fractal structure or different fractal structures with fractal parasitic radiation element 840.For example, fractal radiant element 830 can have the X-shape fractal structure, and fractal parasitic radiation element 840 can have the herringbone fractal structure.
Fig. 9 is the end view that uses according to another embodiment of the present invention the multi-resonant broadband antenna of fractal radiant element, fractal parasitic radiation element and short-circuit.Referring to Fig. 9, the multi-resonant broadband antenna of the present embodiment comprises medium substrate 900, connection of antenna ground 910, feeder line 920, fractal radiant element 930, fractal parasitic radiation element 940 and conductive path 950.The multi-resonant broadband antenna of the present embodiment and Fig. 8 difference be, fractal radiant element 930 and fractal parasitic radiation element 940 interconnect by conductive path 950.
In the multi-resonant broadband antenna of Fig. 9, fractal radiant element 930 and fractal parasitic radiation element 940 interconnect to form short circuit by conductive path 950.If fractal radiant element 930 and fractal parasitic radiation element 940 are interconnected to form short circuit, then can in narrow antenna, increase the effective radiating area of multi-resonant broadband antenna.In addition, because fractal parasitic radiation element 940 is installed on the back of the body surface of connection of antenna ground 910 residing medium substrates 900, therefore can prevent from increasing owing to fractal parasitic radiation element 940 overall dimensions of multi-resonant broadband antenna.
Conductive path 950 is connected to fractal parasitic radiation element 940 with fractal radiant element 930.In addition, the performance of multi-resonant broadband antenna changes according to the position of conductive path 950.Correspondingly, conductive path 950 can be formed in the position away from feeder line 920, namely at outside or the center of multi-resonant broadband antenna, to increase effective radiating area and to realize small-sized multi-resonant broadband antenna.Alternatively, conductive path 950 both can be positioned at the outside of multi-resonant broadband antenna, also can be positioned at its center.
Figure 10 is the end view of multi-resonant broadband antenna according to another embodiment of the present invention.Referring to Figure 10, this multi-resonant broadband antenna comprises medium substrate 1000, connection of antenna ground 1010, feeder line 1020, fractal radiant element 1030, fractal parasitic radiation element 1040 and conductive path 1050.Medium substrate 1000 and fractal parasitic radiation element 1060 sequence stacks are on fractal radiant element 1030.Therefore, having multi resonant with fractal radiant element 1030 the shake fractal parasitic radiation element 1040 and 1060 of characteristic of the identical or different multi resonant of characteristic that shakes is stacked.Thereby the property combination of fractal radiant element 1030 and fractal parasitic radiation element 1040 and 1060 multi resonant can being shaken becomes one to obtain broadband character.
Figure 11 is the end view of multi-resonant broadband antenna according to another embodiment of the present invention.Referring to Figure 11, this multi-resonant broadband antenna comprises medium substrate 1100, connection of antenna ground 1110, feeder line 1120, fractal radiant element 1130 and fractal parasitic radiation element 1140 and 1150.Medium substrate 1100 and fractal parasitic radiation element 1150 sequence stacks are on fractal parasitic radiation element 1140.Therefore, having multi resonant with fractal radiant element 1130 the shake fractal parasitic radiation element 1140 and 1150 of characteristic of the identical or different multi resonant of characteristic that shakes can be stacked.Thereby the property combination of fractal radiant element 1130 and fractal parasitic radiation element 1140 and 1150 multi resonant can being shaken becomes one to obtain broadband character.
Figure 12 is the end view of multi-resonant broadband antenna according to another embodiment of the present invention.
Referring to Figure 12, this multi-resonant broadband antenna comprises medium substrate 1200, connection of antenna ground 1210, feeder line 1220, fractal radiant element 1230, fractal parasitic radiation element 1240,1250 and 1260, and conductive path 1270.Medium substrate 1200 and fractal parasitic radiation element 1250 sequence stacks are on fractal parasitic radiation element 1230.In addition, medium substrate 1200 and fractal parasitic radiation element 1260 sequence stacks are below fractal parasitic radiation element 1240.Therefore, can stackingly have multi resonant with fractal radiant element 1230 the shake fractal parasitic radiation element 1240,1250 and 1260 of characteristic of the identical or different multi resonant of characteristic that shakes.Thereby, fractal radiant element 1230 and fractal parasitic radiation element 1240,1250 can be become one to obtain broadband character with 1260 the multi resonant property combination of shaking.
To shown in Figure 12, fractal parasitic radiation element can be formed on the double side dielectric substrate and have identical shaped or difformity such as Figure 10.In addition, fractal parasitic radiation element can have dissymmetrical structure, and wherein fractal parasitic radiation element only is stacked on above or below the double-sided substrate; Perhaps fractal parasitic radiation element has symmetrical structure, and wherein fractal parasitic radiation stacked elements is in the above and below of double-sided substrate.Alternatively, fractal parasitic radiation element can have dissymmetrical structure, and wherein fractal parasitic radiation stacked elements is above double-sided substrate.Yet the quantity that is stacked on the fractal parasitic radiation element of double-sided substrate top can be not identical with the quantity of the fractal parasitic radiation element that is stacked on the double-sided substrate below.Alternatively, fractal parasitic radiation element can be stacking with conductive path, also can be without conductive path, to realize stacked type antenna.
As mentioned above, fractal radiant element and fractal parasitic radiation element can the single or multiple lift form be stacked on top, below or the both sides of double-sided substrate.Thereby, can be by again radiation, because the coupling between fractal radiant element and the fractal parasitic radiation element can increase effective radiating area in narrow antenna from the electric wave of fractal radiant element and the radiation of fractal parasitic radiation element.The increase of effective radiating area helps to improve performance, return loss and the gain of multi-resonant broadband antenna in low-frequency band, so that the miniaturization that multi-resonant broadband antenna is done.
Figure 13 is the front view of multi-resonant broadband antenna according to another embodiment of the present invention.Referring to Figure 13, multi-resonant broadband antenna comprises medium substrate, connection of antenna ground 1310, feeder line 1320, fractal radiant element 1330 and three conductive paths 1340.Although not shown in Figure 13, fractal parasitic radiation element is positioned on the back of the body surface of medium substrate 1300, and be connected to fractal radiant element 1330 by described three conductive paths 1340.
Here, fractal radiant element 1330 has the fractal grid structure of X-shape, is wherein arranging octagon.The overall dimensions of fractal radiant element 1330 can be in 40 * 40mm scope.The fractal parasitic radiation element relative with the lip-deep fractal radiant element of the back of the body that is positioned at medium substrate 1,300 1330 can have the fractal grid structure of X-shape or difform fractal grid structure.Three conductive paths 1340 are positioned at top and the both sides that wherein are arranged with the fractal grid structure of octagonal X-shape.Three conductive paths 1340 can arrange from feeder line 1320 as far as possible away from, with the effective radiating area that increases multi-resonant broadband antenna and realize multi-resonant broadband antenna.
Outside along the annular fractal pattern that forms radiant element 1330, conductive path 1340 is positioned at the central upper portion corner relative with diametric(al) of fractal radiant element 1330, basically be around the fractal pattern of fractal radiant element 1330, relative with feeder line 1360 at longitudinal direction.Conductive path 1340 as far as possible far with feeder line 1360 effective separations; That is to say, conductive path 1340 and feeder line 2160 have approximately separated the width " d " of fractal pattern 1330.
Figure 14 to 26 is illustrated in the example according to principle of the present invention, is suitable as the different fractal structures of fractal radiant element and fractal parasitic radiation element.
Figure 14 illustrates the detailed structure of the fractal radiant element 1330 of Figure 13.Figure 14 clearly show that the position of at least three conductive paths 1340.Outer shroud around the fractal pattern of fractal radiant element 1330, conductive path 1340 is positioned at central upper portion place and the relative corner of diametric(al) of fractal radiant element 1330, and is relative with feeder line 1360 at longitudinal direction.Conductive path 1340 as far as possible far with feeder line 1360 effective separations; That is to say, conductive path 1340 and feeder line 2160 have approximately separated the width of fractal pattern 1330.Electric coupling feeder line 1360 is to drive fractal radiant element 1330.
Resonance characteristic depends on distance between feeder line 1360 and the conductive path 1340 and the shape of feeder line 1360 and conductive path 1340.
The multi-resonant broadband antenna of Figure 15 to 22 comprises medium substrate, connection of antenna ground, feeder line and fractal radiant element.Multi-resonant broadband antenna also comprises at least one or a plurality of fractal parasitic radiation element and conductive path.Electric coupling feeder line 1560 is to drive each in the fractal radiant element 1510,1520 and 1530.Except the position of the stacked position of fractal radiant element or fractal parasitic radiation element and stacking quantity and conductive path, those of the function of other element and operation and Figure 13 are identical, therefore do not need they are described in detail again in following paragraph.
The fractal radiant element 1500 of Figure 15 has three fractal structures.In three fractal structures, first or outmost fractal radiant element 1510 have the shape identical with the fractal radiant element 1330 of Figure 14.In addition, second or the fractal radiant element of middle fractal radiant element 1520 to the first 1510 little, but its shape is identical with the first fractal radiant element 1510, is arranged on the first fractal radiant element 1510 inside.The 3rd or innermost radiant element 1530 be characterised in that its sectional dimension (such as diameter) is less than the second fractal radiant element 1520, but its shape is identical with the second fractal radiant element 1520, is arranged on the second fractal radiant element 1520 inside.In other words, the fractal radiant element 1500 of Figure 15 has wherein fractal radiant element 1330 with Figure 14 and is divided into the then arranged in co-axial alignment structure of getting up of several unit.Alternatively, except three fractal structures shown in Figure 15, fractal radiant element 1500 also can be two fractal structures or four fractal structures.The first, second, and third fractal radiant element 1510,1520 and 1530 that consists of three fractal structures is connected to feeder line 1550 in operation.Those of the position of conductive path 1540 and the conductive path of Figure 14 1340 are identical.
The fractal radiant element of Figure 16 is the modification to the fractal radiant element 1500 of Figure 15.The fractal radiant element that electric coupling feeder line 1760 forms fractal radiant element 1700 to drive each.Consist of the complete closed hoop that is coupled to feeder line 1560 although form each fractal ring of the fractal radiant element 1500 of Figure 15, in the embodiment shown in Figure 16, the fractal radiant element 1600 of the present embodiment has opening along a side of feeder line 1610.Although fractal element is shown in the embodiment shown in Figure 16 along a side electrical aperture of feeder line 1610, circular, rectangle or polygon fractal pattern can be in other position electrical aperture along single ring or a plurality of rings of the fractal pattern that is formed for fractal radiant element or fractal parasitic radiation element.
The fractal radiant element 1700 of Figure 17 is the modifications to the fractal radiant element 1500 of Figure 15.With the fractal grid structure of asymmetric " L " shape, namely have the fractal grid structure of " L " shape of the leg of unequal length, be added in four jiaos of fractal radiant element 1500 of Figure 15 each, to form fractal radiant element 1700 shown in Figure 17.The fractal grid structure 1710 of asymmetric " L " shape does not form electric closed hoop.Be with the conductive path 1540 of Figure 15 and conductive path 1620 differences of Figure 16, conductive path 1720 is positioned at the corner of the fractal grid structure 1710 of " L " shape, and the fractal grid structure of described " L " shape is coupled to arranged in co-axial alignment, physical separation and forms the outermost ring of a plurality of rings of fractal radiant element 1700 or the periphery of first ring in tangential direction.Therefore, conductive path 1720 can be farther apart with feeder line 1730.
With the fractal grid structure of symmetry " L " shape, namely have the fractal grid structure of " L " shape of the leg of equal length, be added to the fractal structure such as the fractal radiant element 1700 of Figure 17, forming complete closed hoop 1810, thereby consist of the fractal radiant element 1800 of Figure 18.Similar with Figure 17, conductive path 1820 is positioned at center and the corner on outermost ring top, and the outermost ring enlarges by symmetry " L " the shape grid structure that forms fractal radiant element 1800.
The fractal radiant element 1900 of Figure 19 has grid pattern, and wherein the fractal grid structure of X-shape is lined up array to limit the fractal pattern of closure, rectangular shape.With shown in Figure 17 similar, conductive path 1910 is positioned on every side or outermost center and corner along the top of fractal radiant element 1900.
The fractal radiant element 2020 of Figure 20 has grid pattern, is wherein arranging the fractal grid structure of herringbone or lightning shape and X-shape.The fractal grid structure of X-shape is used in the part that the grid pattern congruence is closed, and herringbone or the fractal grid structure of lightning shape are used in other parts.Alternatively, the fractal grid structure of herringbone or lightning shape can be used on the part of fractal radiant element 2020, and the fractal grid structure of X-shape can be used on other parts 2010.Similar with Figure 17, conductive path 2010 is positioned at center and the corner on fractal radiant element 2000 tops.
The fractal radiant element 2120 of Figure 21 has grid pattern, is wherein arranging the fractal grid structure of X-shape.In other words, the fractal grid structure of X-shape is inserted into the white space at grid pattern center, does not arrange fractal grid structure in this white space.The four direction face of the X-shape fractal structure that inserts in addition, is connected to the space that its internal arrangement has the grid pattern of fractal grid structure.With shown in Figure 17 similar, conductive path 2110 is positioned at outermost center and corner along the top that forms fractal radiant element 2120, and the outer shroud around the fractal pattern of fractal radiant element 1900 is relative with feeder line 2060 in the vertical.Conductive path 2110 as far as possible far with feeder line 2160 effective separations, that is to say, conductive path 2110 and feeder line 2160 separate the width of about fractal pattern 2120.
Figure 22 illustrates the fractal radiant element 2220 with the fractal grid structure of Hilbert.Similar with Figure 17, conductive path 2120 is positioned at center and the corner on fractal radiant element top, along the outside of fractal radiant element 2120, the distance of formed knot farthest in diametric(al) or on to the angular direction and between feeder line 2060 and the fractal radiant element 2020.
Figure 23 illustrates annular fractal radiant element 2310, and wherein repeated arrangement the inverted V-shaped fractal structure.In the fractal radiant element shown in Figure 24, the inverted V-shaped fractal structure 2410,2420,2430 of predetermined quantity, 2440 different with 2450 sizes with concentric circles form arranged in co-axial alignment, and is electrically coupled to feeder line 2460.Alternatively, the inverted V-shaped fractal structure can be on dimension fractal pre-determined number, then repeated arrangement is to form circle.
The fractal radiant element of Figure 24 comprises 5 fractal radiant elements 2410,2420,2430,2440 and 2450, and wherein inverted V-shaped is once fractal on dimension, and repeated arrangement is circular.With feeder line 2460 electric coupling with drive fractal radiant element 2410,2420,2430,2440 and 2450 each.Alternatively, for the fractal radiant element that forms closed hoop, also other embodiment of fractal radiant element 2400 can be configured to a side electrical aperture of each fractal radiant element.
Figure 25 illustrates square fractal radiant element 2510, and wherein repeated arrangement the inverted V-shaped fractal structure.The fractal radiant element 2610 of shown in Figure 26 5,2620,2630,2640 and 2650 is square, wherein with shown in Figure 24 similar, the inverted V-shaped fractal structure on dimension fractal once and repeated arrangement.With feeder line 2660 electric coupling to drive each in the fractal radiant element 2610,2620,2630,2640 and 2650.
Figure 27 is the schematic diagram according to multi-resonant broadband antenna return loss of the present invention.Here, return loss is to measure in the frequency band between 100MHz and 2700MHz.As shown in figure 27, return loss improves in broadband.
As previously discussed, the multi-resonant broadband antenna that has fractal structure can be realized by the array that modern fractal structure antenna is revised.Therefore, the size maximizing of the multi-resonant broadband antenna of per unit area.Thereby the radiation efficiency of multi-resonant broadband antenna increases, and the miniaturization that can do for the multi-resonant broadband antenna of respective wavelength.
According to principle of the present invention, multiple multi-resonant broadband antenna embodiment can be formed by following section construction: medium substrate, and its upper surface supports the fractal radiant element with predetermined fractal grid structure, and fractal grid structure bonds to the upper surface of medium substrate; Along medium substrate upper surface arrange the to feed feeder line of fractal radiant element; And the ground plane that bonds to the medium substrate lower surface relative with feeder line.Adjacent fractal parasitic radiation element is used for the electromagnetic wave of again radiation from fractal radiant element, it can be arranged on the position of the medium substrate lower surface relative with fractal radiant element, and is relative with fractal radiant element and separate by medium element and fractal radiant element.
Form fractal element or a plurality of fractal element of fractal radiant element pattern or fractal parasitic radiation element pattern, available coaxial manner array structure becomes around the symmetrically arranged closed hoop of feeder line.In other embodiments, fractal radiant element pattern or fractal parasitic radiation element pattern can be configured to establish by cable the road ring, and for example, the near-end of radiant element is electrically coupled to feeder line, far-end physics open circuit and the electrical open of radiant element.
Multi-resonant broadband antenna also can be configured to, on the lower surface of medium substrate, at least one additional fractal parasitic radiation stacked elements is on adjacent parasitic radiation element, with fractal radiant element geometric alignment, described additional fractal parasitic radiation element again radiation from the electromagnetic wave of fractal radiant element radiation.
At least one is oriented again radiation from the electromagnetic additional fractal parasitic radiation element of fractal radiant element radiation, can be stacked at the upper surface of medium substrate on the fractal radiant element and with it and aim at.
In specific embodiment, multi-resonant broadband antenna can be constructed with at least one additional fractal parasitic radiation element, additional fractal parasitic radiation element is used for the electromagnetic wave of again radiation from fractal radiant element radiation, additional fractal parasitic radiation stacked elements is on fractal radiant element, with fractal radiant element geometric alignment.
One or more conductive paths can be formed between one of them fractal radiant element and the adjacent fractal radiant element, perhaps are formed between a pair of additional fractal parasitic radiation element.Conductive path is set to the peripheral part of the adjacent fractal pattern of electric coupling, and path separates the width of about fractal pattern in the vertical, to separate with feeder line as far as possible far.That is to say, the short-circuit of formation comprises fractal radiant element, fractal parasitic radiation element and the conductive path that forms between fractal radiant element and fractal parasitic radiation element.Thereby, can realize broadband, high efficiency microcell antenna.
Although specifically described the present invention with reference to its illustrative examples, should be understood that do not breaking away from the spirit and scope of the present invention situation that is limited by appended claims, those skilled in the art can do multiple variation to it in form and details.
Claims (13)
1. multi-resonant broadband antenna comprises:
Medium substrate;
Be bonded in the fractal radiant element on the upper surface of medium substrate, it has predetermined fractal grid structure;
Be bonded on the upper surface of medium substrate the feeder line with the fractal radiant element of feeding;
Be arranged on the ground plane on the lower surface of the medium substrate relative with feeder line;
Be configured to again radiation from the electromagnetic fractal parasitic radiation element of fractal radiant element radiation, it is bonded on the position of lower surface of the medium substrate relative with fractal radiant element; With
At least one that between fractal radiant element and fractal parasitic radiation element, forms or a plurality of conductive path.
2. multi-resonant broadband antenna as claimed in claim 1 comprises medium substrate and further is stacked on one of them fractal radiant element or is stacked at least one or a plurality of fractal parasitic radiation element of fractal parasitic radiation element below.
3. multi-resonant broadband antenna as claimed in claim 2 is included at least one or a plurality of conductive path that form between the fractal parasitic radiation element.
4. multi-resonant broadband antenna as claimed in claim 1 comprises the electric conductor that comprises fractal structure, and described fractal structure comprises repeating to arrange and forms at least a with in the X-shape, herringbone, Hilbert shape and the inverted V-shaped that form fractal radiant element of array.
5. multi-resonant broadband antenna as claimed in claim 4 comprises the fractal radiant element with fractal grid structure, described fractal grid structure comprise have octagon, circle and one of square at least one or the array of a plurality of basic structures.
6. multi-resonant broadband antenna as claimed in claim 5, and fractal radiant element comprises the fractal grid structure with peristome.
7. multi-resonant broadband antenna as claimed in claim 5 comprise the fractal grid structure of " L " shape at four angles that are added to the fractal radiant element of octagon, and the fractal grid structure of " L " shape is open-ended or closed.
8. multi-resonant broadband antenna as claimed in claim 1 comprises described at least one or a plurality of conductive path that separate with feeder line are set to get as far as possible far.
9. multi-resonant broadband antenna as claimed in claim 3 comprises described at least one or a plurality of conductive path that separate with feeder line are set to get as far as possible far.
10. multi-resonant broadband antenna as claimed in claim 1 comprises fractal radiant element and fractal parasitic radiation element with identical fractal structure.
11. multi-resonant broadband antenna as claimed in claim 1 comprises fractal radiant element and fractal parasitic radiation element with different fractal structures.
12. multi-resonant broadband antenna as claimed in claim 2 comprises fractal radiant element and fractal parasitic radiation element with identical fractal structure.
13. multi-resonant broadband antenna as claimed in claim 2 comprises fractal radiant element and fractal parasitic radiation element with different fractal structures.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070037160A KR100878706B1 (en) | 2007-04-16 | 2007-04-16 | Multi-resonant broadband antenna |
| KR10-2007-0037160 | 2007-04-16 | ||
| KR10-2007-0052930 | 2007-05-30 | ||
| KR10-2007-0052929 | 2007-05-30 | ||
| KR1020070052930A KR100878707B1 (en) | 2007-05-30 | 2007-05-30 | Multi resonant broadband antenna |
| KR1020070052929A KR100888605B1 (en) | 2007-05-30 | 2007-05-30 | Broadband fractal antenna |
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| Publication Number | Publication Date |
|---|---|
| CN101291014A CN101291014A (en) | 2008-10-22 |
| CN101291014B true CN101291014B (en) | 2013-02-06 |
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| CN2007103061562A Expired - Fee Related CN101291014B (en) | 2007-04-16 | 2007-11-29 | Multi-resonant broadband antenna |
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| KR (1) | KR100878706B1 (en) |
| CN (1) | CN101291014B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101557035B (en) * | 2009-05-20 | 2012-08-15 | 重庆大学 | Local discharge ultrahigh-frequency detection fractal antenna and preparation method thereof |
| CN102394347A (en) | 2011-07-01 | 2012-03-28 | 中兴通讯股份有限公司 | Antenna |
| CN104133163B (en) * | 2014-06-06 | 2017-05-03 | 重庆大学 | External multi-band ultrahigh-frequency sensor for online GIS partial discharge detection |
| CN104183912B (en) * | 2014-08-13 | 2016-08-24 | 重庆大学 | A kind of miniaturized dual-band monopole antenna based on metamaterial unit |
| US9620861B1 (en) | 2015-06-01 | 2017-04-11 | Lockheed Martin Corporation | Configurable joined-chevron fractal pattern antenna, system and method of making same |
| CN105896030B (en) * | 2016-05-04 | 2019-04-12 | 北京邮电大学 | A kind of multiband fractal structure mobile terminal antenna |
| CN106469849B (en) * | 2016-09-30 | 2019-05-03 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | A kind of band KOCH divides the multi-frequency monopole sub-antenna of shape radiation Bending minor matters |
| CN109687120B (en) * | 2018-11-23 | 2020-10-30 | 河南师范大学 | Omnidirectional double-ring small microstrip antenna |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425208A (en) * | 2000-01-19 | 2003-06-18 | 弗拉克托斯股份有限公司 | Space-filling miniature antennas |
| CN1816943A (en) * | 2003-04-24 | 2006-08-09 | 先进汽车天线有限公司 | Antenna system for a motor vehicle |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6476766B1 (en) | 1997-11-07 | 2002-11-05 | Nathan Cohen | Fractal antenna ground counterpoise, ground planes, and loading elements and microstrip patch antennas with fractal structure |
| US6127977A (en) | 1996-11-08 | 2000-10-03 | Cohen; Nathan | Microstrip patch antenna with fractal structure |
| US6104349A (en) | 1995-08-09 | 2000-08-15 | Cohen; Nathan | Tuning fractal antennas and fractal resonators |
| US7026997B2 (en) | 2004-04-23 | 2006-04-11 | Nokia Corporation | Modified space-filling handset antenna for radio communication |
| JP2006279421A (en) * | 2005-03-29 | 2006-10-12 | Furukawa Electric Co Ltd:The | Linear small-sized antenna |
| TWI312591B (en) | 2005-05-27 | 2009-07-21 | Ind Tech Res Inst | Vertical complementarily fractal antenna |
| KR100777665B1 (en) * | 2006-04-21 | 2007-11-19 | 삼성탈레스 주식회사 | Small fractal antenna for multi-band operation |
-
2007
- 2007-04-16 KR KR1020070037160A patent/KR100878706B1/en active IP Right Grant
- 2007-11-29 CN CN2007103061562A patent/CN101291014B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425208A (en) * | 2000-01-19 | 2003-06-18 | 弗拉克托斯股份有限公司 | Space-filling miniature antennas |
| CN1816943A (en) * | 2003-04-24 | 2006-08-09 | 先进汽车天线有限公司 | Antenna system for a motor vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101291014A (en) | 2008-10-22 |
| KR20080093338A (en) | 2008-10-21 |
| KR100878706B1 (en) | 2009-01-14 |
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