CN102891352B - Antenna unit, antenna and antenna matching device with antenna unit - Google Patents
Antenna unit, antenna and antenna matching device with antenna unit Download PDFInfo
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- CN102891352B CN102891352B CN201110204084.7A CN201110204084A CN102891352B CN 102891352 B CN102891352 B CN 102891352B CN 201110204084 A CN201110204084 A CN 201110204084A CN 102891352 B CN102891352 B CN 102891352B
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Abstract
The invention discloses an antenna unit which comprises four comb-shaped structures, wherein the first to the fourth comb-shaped structures are arranged at intervals along the horizontal direction; a plurality of first comb teeth are respectively inserted into a plurality of second comb gaps and the adjacent first and second comb teeth are mutually isolated in the vertical direction; a plurality of third comb teeth are respectively inserted into a plurality of fourth comb teeth and the adjacent third and fourth comb teeth are mutually isolated in the vertical direction; the lower body of a first comb body is connected with the lower end of the third comb body; the upper end of the second comb body is connected with the upper end of the fourth comb body; the lower end of the second comb body is connected with the upper end of the third comb body; and at least one feeding point is arranged on at least one of the first to the fourth comb-shaped structures. The antenna unit provided by the invention has the characteristic of small size, the requirements of a mobile terminal which is constantly reduced in size at present on the size of a built-in antenna are met, and the electric performance indexes within a higher relative bandwidth are increased. The invention also discloses an antenna and an antenna matching device.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of antenna element, there is the antenna of this antenna element and there is the antenna matching unit of this antenna element.
Background technology
The design of current mobile terminal antenna mainly contains external antenna and built-in aerial two kinds.Wherein, built-in aerial is based on planar inverted-F antenna (Planar Inverted-F Antenna) and unipole antenna (Monopole) two kinds of forms, and external antenna is based on unipole antenna form.
Planar inverted-F antenna now makes a kind of built-in aerial with the most use in the terminal, and it is developed by the wire antenna of falling F, and have volume little, gain is high, and section is low, the feature that bandwidth is relatively wide.Planar inverted-F antenna is equivalent to the parallel connection of a large amount of IFA antenna, changes the trend of electric current, and then enhances the polarization of antenna other direction, produces pattern more.Therefore not only create wideband resonance characteristic, and reduce size.Planar inverted-F antenna is by debugging distributing point and position, the relative distance of presenting place, and track lengths, walks the parameters such as distance between centers of tracks to regulate resonance frequency and resonance width.
Unipole antenna, by regulating antenna length, walks wire spacing, and the means such as the adjustment of matching element reach the object that adjustment resonance regulates bandwidth.
Along with the development of mobile terminal, the requirement of its outward appearance and practicality aspect improves further.External antenna is based on monopole antenna, and external antenna is exposed to outside body and is easy to damage, and antenna causes performance depreciation when human body, and not easily adds such as reflecting layer and protective layer etc. to reduce the radiation injury of antenna to human body, and size is comparatively large, is not easy to carry.Therefore, current mobile terminal many employings built-in aerial, comprises micro-strip paster antenna, slot antenna, IFA antenna and the antenna of falling L, PIFA, ceramic antenna etc.Built-in aerial can better meet portable demand compared to external antenna.Further, built-in aerial is convenient in use compared to telescopic antenna.
But it is less at the gross area, when relative bandwidth is higher, built-in aerial is difficult to reach good electrical performance indexes (as return loss Return Loss bandwidth), especially in low-frequency band sections such as CMMB (China Mobile Multimedia Broadcasting, China Mobile's DMB).
Summary of the invention
Object of the present invention is intended at least solve one of above-mentioned technological deficiency, and first object of the present invention is to propose the antenna element that a kind of volume is little, electrical performance indexes is good.Second object of the present invention is at a kind of antenna with above-mentioned antenna element of proposition.3rd object of the present invention is to propose a kind of antenna matching unit with above-mentioned antenna element.
For achieving the above object, the embodiment of first aspect present invention proposes a kind of antenna element, comprise the first pectinate texture, multiple first comb that described first pectinate texture comprises the first comb body and extends from the side of described first comb body, described multiple first comb is arranged spaced apart to limit multiple first comb seam along the length direction of described first comb body, second pectinate texture, multiple second comb that described second pectinate texture comprises the second comb body and extends from the side of described second comb body, described multiple second comb is arranged spaced apart to limit multiple second comb seam along the length direction of described second comb body, 3rd pectinate texture, multiple 3rd comb that described 3rd pectinate texture comprises the 3rd comb body and extends from the side of described 3rd comb body, described multiple 3rd comb is arranged spaced apart to limit multiple 3rd comb seam along the length direction of described 3rd comb body, with the 4th pectinate texture, multiple 4th comb that described 4th pectinate texture comprises the 4th comb body and extends from the side of described 4th comb body, described multiple 4th comb is arranged spaced apart to limit multiple 4th comb seam along the length direction of described 4th comb body, wherein said first to fourth pectinate texture is arranged spaced apart in the horizontal direction, it is spaced that described multiple first comb is inserted in the vertical direction between the first and second comb in described multiple second comb seam and adjacent respectively, it is spaced that described multiple 3rd comb is inserted in the vertical direction between the third and fourth comb in described multiple 4th comb seam and adjacent respectively, the lower end of wherein said first comb body is connected with the lower end of described 3rd comb body, the upper end of described second comb body is connected with the upper end of described 4th comb body, the lower end of described second comb body is connected with the upper end of described 3rd comb body, and at least one distributing point is provided with at least one pectinate texture of described first to fourth pectinate texture.
According to the antenna element of the embodiment of the present invention, there is the little feature of volume, thus mobile terminal that current volume constantly reduces can be met to the volume requirement of built-in aerial, and the electrical performance indexes that can improve in higher relative bandwidth, better electrical performance indexes can be reached, as return loss (Return Loss) bandwidth sum radiation efficiency etc. in the antenna of same volume.
In one embodiment of the invention, described distributing point is with direct way of contact feed or coupled modes feed.
In one embodiment of the invention, described antenna element comprises one or more earth point, and described earth point is located at least one pectinate texture in described first to fourth pectinate texture.
In one embodiment of the invention, the width of described first to fourth comb is equal and length is equal, and the width of described first to fourth comb seam is equal and length is equal.
In one embodiment of the invention, described first to fourth comb is rectangle.
In one embodiment of the invention, the width of described first to fourth comb body is identical.
In one embodiment of the invention, the width of the width of described 4th comb body, described first comb body, the width of described 3rd comb body and the width of described second comb body reduce successively.
In one embodiment of the invention, the lower end of described first comb body is connected by the first strip connecting portion with the lower end of described 3rd comb body, the upper end of described second comb body is connected by the second strip connecting portion with the upper end of described 4th comb body, and the lower end of described second comb body is connected by Article 3 shape connecting portion with the upper end of described 3rd comb body.
In one embodiment of the invention, the width of described second strip connecting portion is greater than the width of described first and Article 3 shape connecting portion.
In one embodiment of the invention, described Article 3 shape connecting portion comprises multiple linkage section, and described multiple linkage section is connected successively, and the lower end of described second comb body is connected with the upper end of described 3rd comb body through the described multiple linkage section be connected successively.
In one embodiment of the invention, described Article 3 shape connecting portion comprises the first to the 7th linkage section, and the left end of wherein said first linkage section is connected with the lower end of described second comb body and extends to the right in the horizontal direction, the lower end of described second linkage section is connected with the right-hand member of described first linkage section and the upper end edge vertical direction of described second linkage section upwards extends, the right-hand member of described 3rd linkage section is connected with the upper end of described second linkage section and the left end of described 3rd linkage section extends left in the horizontal direction, the upper end of described 4th linkage section be connected with the left end of described 3rd linkage section and the lower end edge vertical direction of described 4th linkage section to downward-extension, the right-hand member of described 5th linkage section is connected with the lower end of described 4th linkage section and the left end of described 5th linkage section extends left in the horizontal direction, the lower end of described 6th linkage section is connected with the left end of described 5th linkage section and the upper end edge vertical direction of described 6th linkage section upwards extends, the left end of described 7th linkage section is connected with the upper end of described 6th linkage section and the right-hand member of described 7th linkage section extends to the right in the horizontal direction and is connected with the upper end of described 3rd comb body.
In one embodiment of the invention, the lower end of described first comb body is connected by the first strip connecting portion with the lower end of described 3rd comb body, the upper end of described second comb body is connected by the second strip connecting portion with the upper end of described 4th comb body, and the lower end of described second comb body is connected with the upper end of described 3rd comb body.
In one embodiment of the invention, the lower end of described first comb body is connected by the first strip connecting portion with the lower end of described 3rd comb body, the upper end of described second comb body is connected by the second strip connecting portion with the upper end of described 4th comb body, and described second comb body and described 3rd comb body share a comb body.
In one embodiment of the invention, the lower end of described first comb body and in the vertical direction concordant in the horizontal direction with the lower end of described 3rd comb body extends downward beyond the lower end of described second comb body, the upper end of described second comb body and in the vertical direction concordant in the horizontal direction with the upper end of described 4th comb body extends upwardly beyond the upper end of described 3rd comb body, the upper end in the vertical direction of described first comb body extends upwardly beyond the upper end of described second comb body, and the lower end in the vertical direction of described 4th comb body extends downward beyond the lower end of described first comb body.
In one embodiment of the invention, comprise feed stripes further, the right-hand member of described feed stripes be connected with the lower end of described 4th comb body and the left end of described feed stripes extend in the horizontal direction and concordant with the lower end in the vertical direction of described first comb body be used as distributing point.
The embodiment of second aspect present invention proposes a kind of antenna, comprise multiple antenna element, at least one in described multiple antenna element is the antenna element described in first aspect present invention embodiment, is connected or coupled modes connection between described antenna element by wire.
The antenna provided according to the embodiment of the present invention can by changing the quantity of antenna element, and the connected mode between each antenna element, thus reach increase resonance point, improves the object of bandwidth.In addition, the antenna element in the antenna that the embodiment of the present invention provides has an antenna element provided for first aspect present invention embodiment at least, and other antenna elements can be existing other forms of antenna element, thus makes antenna have multiple implementation.The frequency range that the antenna that the embodiment of the present invention provides uses is not limit, and can combine for the frequency band that mobile terminal is conventional.Specifically, the antenna of the embodiment of the present invention can total length be less than 60 millimeters, overall width is less than 10 millimeters, thickness is not less than in the space of 8 millimeters, be greater than (470MHz-798MHz) in the working band of 50% in relative bandwidth and realize multiple resonant frequency point, and have source efficiency to be greater than 5%, peak efficiency can reach more than 40%.
In one embodiment of the invention, adjacent described antenna element is connected by one of following three kinds of modes: series, parallel or string the series-parallel connection of mixing.
In one embodiment of the invention, described multiple antenna element is the antenna element described in embodiment of first aspect present invention.Because each antenna element in antenna is the antenna element described in first aspect present invention embodiment, and the public comb body of adjacent antenna units, thus make antenna have less volume, meet the volume requirement of built-in aerial.
The embodiment of third aspect present invention proposes a kind of antenna matching unit, described antenna matching unit is between load circuit and the feedback point of antenna, for mating with the input impedance of described treatment circuit the output impedance of described antenna, described antenna matching unit comprises the antenna element described in the embodiment of at least one first aspect present invention, is connected or coupled modes connection between wherein said antenna element by wire.
According to the antenna matching unit of the embodiment of the present invention, can by changing the quantity of antenna element, and the connected mode between each antenna element, thus the matched impedance of adjustment antenna matching unit is to carry out impedance matching to antenna and follow-up load circuit, reduce the energy loss in Signal transmissions, improve the quality of Signal transmissions.
In one embodiment of the invention, be connected by following three kinds of modes between described antenna element: series, parallel or string the series-parallel connection of mixing.
In one embodiment of the invention, described multiple antenna element is the antenna element described in embodiment according to a first aspect of the present invention.
In one embodiment of the invention, the output impedance of the antenna element that described antenna matching unit is used for the first aspect of the present invention described in embodiment is mated with the input impedance of corresponding load circuit, wherein, described antenna matching unit is connected by following three kinds of modes with described antenna element: series, parallel or string the series-parallel connection mixed.
In one embodiment of the invention, described antenna matching unit is used for mating with the input impedance of corresponding load circuit the output impedance of the antenna described in second aspect present invention embodiment, wherein, described antenna matching unit is connected by following three kinds of modes with described antenna: series, parallel or string the series-parallel connection mixed.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the structural representation of the antenna element according to the embodiment of the present invention;
Fig. 2 is the structural representation of the antenna according to the embodiment of the present invention; And
Fig. 3 is the equivalent reactance schematic diagram of antenna in Fig. 2.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it will be appreciated that, term " longitudinal direction ", " transverse direction ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In describing the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
Below with reference to Fig. 1, the antenna element 100 according to the embodiment of the present invention is described.
As shown in Figure 1, the first pectinate texture 110, second pectinate texture 120, the 3rd pectinate texture 130 and the 4th pectinate texture 140 is comprised according to the antenna element 100 of the embodiment of the present invention.Wherein the first pectinate texture 110, second pectinate texture 120, the 3rd pectinate texture 130 and the 4th pectinate texture 140 in the horizontal direction (transverse direction in Fig. 1) arranged spaced apart.
In one embodiment of the invention, the first pectinate texture 110 multiple first comb 112 of comprising the first comb body 111 and extending from the side of the first comb body 111.Multiple first comb 112 is arranged spaced apart along the length direction of the first comb body 111, thus limits multiple first at the homonymy with multiple first comb 112 and comb and stitch.Multiple second comb 122 that second pectinate texture 120 comprises the second comb body 121 and extends from the side of the second comb body 121.Multiple second comb 122 is arranged spaced apart along the length direction of the second comb body 121, thus limits multiple second at the homonymy with multiple second comb 122 and comb and stitch.Multiple 3rd comb 132 that 3rd pectinate texture 130 comprises the 3rd comb body 131 and extends from the side of the 3rd comb body 131.Multiple 3rd comb 132 is arranged spaced apart along the length direction of the 3rd comb body 131, thus limits the multiple 3rd at the homonymy with multiple 3rd comb 132 and comb and stitch.Multiple 4th comb 142 that 4th pectinate texture 140 comprises the 4th comb body 141 and extends from the side of the 4th comb body 141.Multiple 4th comb 142 is arranged spaced apart along the length direction of the 4th comb body 141, thus limits the multiple 4th at the homonymy with multiple 4th comb 142 and comb and stitch.
As shown in Figure 1, multiple first comb 112 is inserted in multiple second comb seam respectively.Correspondingly, multiple second comb 122 is inserted in multiple first comb seam respectively, thus makes between the first adjacent comb 112 and the second comb 122 upper spaced at vertical direction (vertical in Fig. 1).Multiple 3rd comb 132 is inserted in multiple 4th comb seam respectively.Correspondingly, multiple 4th comb 142 is inserted in multiple 3rd comb seam respectively, thus makes in the vertical direction between the 3rd adjacent comb 132 and the 4th comb 142 spaced.
First comb 112, second comb 122, the 3rd comb 132 and the 4th comb 142 can have any shape, as long as meet the first comb 112, second comb 122, the 3rd comb 132 and the 4th comb 142 can respectively with comb body formed pectinate texture, and the first comb 112 and the second comb 122, the 3rd comb 132 and the 4th comb 142 spaced, be staggered.
In one embodiment of the invention, the first comb 112, second comb 122, the 3rd comb 132 and the 4th comb 142 can be rectangle.
In one embodiment of the invention, the width of the first comb 112, second comb 122, the 3rd comb 132 and the 4th comb 142 is equal and length is also equal.Certainly it will be understood by those skilled in the art that, the width of the first comb 112, second comb 122, the 3rd comb 132 and the 4th comb 142 can be unequal, and length also can be unequal, as long as meet the first comb 112, second comb 122, the 3rd comb 132 and the 4th comb 142 can respectively with comb body formed pectinate texture, and the first comb 112 and the second comb 122, the 3rd comb 132 and the 4th comb 142 spaced, be staggered.
In yet another embodiment of the present invention, the width that the first comb stitches, the second comb seam, the 3rd comb seam and the 4th comb seam is equal and length is also equal.Certainly it will be appreciated by persons skilled in the art that the width of the first comb seam, the second comb seam, the 3rd comb seam and the 4th comb seam can be unequal, and length also can be unequal.As long as meet comb can be placed in corresponding comb seam.
As shown in Figure 1, the width of the width of the 4th comb body 141, the width of the first comb body 111, the width of the 3rd comb body 131 and the second comb body 121 reduces successively.Certainly it will be appreciated by persons skilled in the art that the width of the 4th comb body 141, first comb body 111, the 3rd comb body 131 and the second comb body 121 is not limited thereto.By arranging different width to each comb body, thus antenna element is made to have different resonant frequencies.In one embodiment of the invention, the first comb body 111, second comb body 121, the 3rd comb body 131 are identical with the width of the 4th comb body 141.
The first pectinate texture 110, second pectinate texture 120, the 3rd pectinate texture 130 and the 4th pectinate texture 140 one or more on be provided with at least one distributing point.Wherein, distributing point can with direct contact type feed or coupled modes feed.Wherein, coupled modes feed is non-direct contact type feed.Such as, as shown in Figure 1, distributing point is arranged in the lower end (the some B of Fig. 1) of the 4th comb body 141.
In one embodiment of the invention, antenna element 110 also comprises one or more earth point, and wherein earth point is arranged at least one pectinate texture of the first pectinate texture 110, second pectinate texture 120, the 3rd pectinate texture 130 and the 4th pectinate texture 140.Such as, as shown in Figure 1, earth point is arranged in the upper end (the some A of Fig. 1) of the first comb body 111.
In one embodiment of the invention, the lower end of the first comb body 111 is connected by the first strip connecting portion 150 with the lower end of the 3rd comb body 131, the upper end of the second comb body 121 is connected by the second strip connecting portion 160 with the upper end of the 4th comb body 141, and the lower end of the second comb body 121 is connected by Article 3 shape connecting portion 170 with the upper end of the 3rd comb body 131.
As shown in Figure 1, the width of the second strip connecting portion 160 is greater than the width of the first strip connecting portion 150 and the width of Article 3 shape connecting portion 170.
Article 3 shape connecting portion 170 comprises multiple linkage section, and wherein each linkage section is connected successively.The lower end of the second comb body 121 is connected with the upper end of the 3rd comb body 131 through the connecting portion be connected successively.
In one embodiment of the invention, Article 3 shape connecting portion 170 can comprise Article 3 shape connecting portion 170 and comprise the first linkage section, the second linkage section, the 3rd linkage section, the 4th linkage section, the 5th linkage section, the 6th linkage section and the 7th linkage section.As shown in Figure 1, the left end of the first linkage section is connected with the lower end of the second comb body 121 and extends to the right in the horizontal direction, and the lower end of the second linkage section is connected with the right-hand member of the first linkage section.The upper end edge vertical direction of the second linkage section upwards extends, and the right-hand member of the 3rd linkage section is connected with the upper end of the second linkage section.The left end of the 3rd linkage section extends left in the horizontal direction, and the upper end of the 4th linkage section is connected with the left end of the 3rd linkage section.The lower end edge vertical direction of the 4th linkage section is to downward-extension, and the right-hand member of the 5th linkage section is connected with the lower end of the 4th linkage section.The left end of the 5th linkage section extends left in the horizontal direction, and the lower end of the 6th linkage section is connected with the left end of the 5th linkage section.The upper end edge vertical direction of the 6th linkage section upwards extends, and the left end of the 7th linkage section is connected with the upper end of the 6th linkage section.The right-hand member of the 7th linkage section extends to the right in the horizontal direction and is connected with the upper end of the 3rd comb body 131.
In one embodiment of the invention, the lower end of the first comb body 111 and in the vertical direction concordant in the horizontal direction with the lower end of the 3rd comb body 131 extends downward beyond the lower end of the second comb body 121, thus make to leave the first gap between the first linkage section of the first strip connecting portion 150 and Article 3 shape connecting portion 170, this first gap and first is combed to stitch and is communicated with.
The upper end of the second comb body 121 is concordant in the horizontal direction with the upper end of the 4th comb body 141 and on branch direction, extend upwardly beyond the upper end of the 3rd comb body 131, thus make to leave the second gap between the second strip connecting portion 160 and the 7th linkage section of Article 3 shape connecting portion 170, this second gap and the 4th is combed to stitch and is communicated with.
In one embodiment of the invention, the second comb body 121 can share a comb body with the 3rd comb body 131, and namely the second comb body 121 and the 3rd comb body 131 overlap is a comb body.Now, the length of Article 3 shape connecting portion 170 is zero.
Antenna element 100 comprises feed stripes 180 further, wherein one end of feed stripes 180 is connected with one or more in the first pectinate texture 110, second pectinate texture 120, the 3rd pectinate texture 130 or the 4th pectinate texture 140, and the other end of feed stripes 180 is as distributing point.
In one embodiment of the invention, the right-hand member of feed stripes 180 is connected with the lower end of the 4th comb body 141, and the left end of feed stripes 180 extend in the horizontal direction and concordant with the lower end in the vertical direction of the first comb body 111 be used as distributing point (the some B in Fig. 1).
The upper end in the vertical direction of the first comb body 111 extends upwardly beyond the upper end of the second comb body 121, as earth point (the some A in Fig. 1).The lower end in the vertical direction of the 4th comb body 141 extends downward beyond the lower end of the first comb body 111, thus make the first strip connecting portion 150 and feed stripes 180 spaced apart.
In one embodiment of the invention, antenna element 100 is formed by adopting metal routing (the first strip connecting portion 150, second strip connecting portion 160, Article 3 shape connecting portion 170 and feed stripes 180 etc. as in Fig. 1) and metal comb teeth structure on base material.Wherein, base material can be polytetrafluoroethylene (PTFE) FR-4PCB plate (FR-4PCB), pottery, ABS (Acrylonitrile Butadiene Styrene, acrylonitrile-butadiene-styrene copolymer), PC (Polycarbonate, Merlon) etc.Certainly it will be appreciated by persons skilled in the art that base material is not limited thereto, other materials can also be adopted to make.
In the antenna element 100 of the embodiment of the present invention, resonance frequency and return loss bandwidth can be changed by regulating spacing, the size equidimension parameter of metal routing length, width and comb.And by the position of regulated ground point (the some A in Fig. 1), change resonant bandwidth.
According to the antenna element of the embodiment of the present invention, there is the little feature of volume, thus mobile terminal that current volume constantly reduces can be met to the volume requirement of built-in aerial, and the electrical performance indexes that can improve in higher relative bandwidth, better electrical performance indexes can be reached, as return loss (Return Loss) bandwidth sum radiation efficiency etc. in the antenna of same volume.
Below with reference to Fig. 2 and Fig. 3, the antenna 1000 according to the embodiment of the present invention is described.
Antenna 1000 according to the embodiment of the present invention comprises multiple antenna element, at least one wherein in multiple antenna element antenna element 100 for providing in first aspect present invention embodiment.Wherein, can be connected by wire between antenna element 100 or coupled modes connect.Wherein, wire connects for direct contact type connects, and coupled modes connect for non-direct contact type connects.
In one embodiment of the invention, can be connected by following three kinds of modes between antenna element: series, parallel or string the series-parallel connection of mixing.
The antenna 1000 of the embodiment of the present invention is made by metallization mode.In one embodiment of the invention, antenna 1000 can pass through flexible printed circuit board (Flexible Printed Circuit, FPC) and make, and is attached to by can on the support made of injected plastics material.Antenna 1000 can also be made by steel plate.But it should be noted that, above-mentioned flexible printed circuit board and steel plate are for exemplary purposes, instead of in order to limit the scope of the invention.Be understandable that, the antenna 1000 that the embodiment of the present invention provides can be made by any metallization mode.
In one embodiment of the invention, the multiple antenna elements in antenna 1000 can be the antenna element 100 provided in first embodiment of the invention.Wherein, adjacent antenna element 100 can a public comb body.
As from the foregoing, in the antenna 1000 of the embodiment of the present invention comprise at least one as the antenna element 100 in first embodiment of the invention, both can carrying out being combined to form antenna 1000 with having other antenna elements mutually isostructural with this antenna element 100, also can carry out being combined to form antenna 1000 with other antenna elements of this antenna element 100 different structure with having.
In one embodiment of the invention, antenna 1000 can be CMMB (China Mobile Multimedia Broadcasting, China Mobile's DMB) (frequency range is positioned at 470MHz-798MHz) mobile terminal antenna.
For 470MHz-798MHz frequency range, antenna 1000 comprises two antenna elements, and wherein each antenna element is the antenna element 100 provided in first aspect present invention embodiment.Wherein, the public comb body of adjacent antenna element.As shown in Figure 2, multiple antenna elements of antenna 1000 connect in the horizontal direction.Wherein, the 4th comb body of first antenna element and the first comb body of adjacent second antenna element are same comb body.The antenna element 100 provided in first aspect present invention embodiment is owing to adopting each antenna element in the antenna 1000 of above-mentioned form, and the public comb body of adjacent antenna units, thus make antenna 1000 have less volume, meet the volume requirement of built-in aerial.Shown in composition graphs 1, by increasing the 3rd linkage section and the 7th linkage section length in the horizontal direction of Article 3 shape connecting portion 170, the resonant frequency point of antenna 1000 can be made to reduce.
For radiofrequency signal, in antenna 1000 each antenna element pectinate texture between cabling can be equivalent to inductance, comb can be equivalent to electric capacity.Fig. 3 shows the equivalent reactance schematic diagram of antenna 1000 in Fig. 2.By introducing electric capacity, thus can reactance be balanced, increasing effective electrical length, make signal can radiation better, thus improve bandwidth.
The antenna 1000 provided according to the embodiment of the present invention can by changing the quantity of antenna element, and the connected mode between each antenna element, thus reach increase resonance point, improve the object of bandwidth, thus antenna resonance frequency can be tuning easily.In addition, the antenna element in the antenna that the embodiment of the present invention provides has an antenna element provided for first aspect present invention embodiment at least, and other antenna elements can be existing other forms of antenna element, thus makes antenna have multiple implementation.The frequency range that the antenna 1000 that the embodiment of the present invention provides uses is not limit, and can combine for the frequency band that mobile terminal is conventional.Specifically, the antenna 1000 of the embodiment of the present invention can total length be less than 60 millimeters, overall width is less than 10 millimeters, thickness is not less than in the space of 8 millimeters, be greater than (470MHz-798MHz) in the working band of 50% in relative bandwidth and realize multiple resonant frequency point, and have source efficiency to be greater than 5%, peak efficiency can reach more than 40%.
But it should be noted that, the frequency range of above-mentioned antenna 1000 is positioned at 470MHz-798MHz frequency range just for exemplary purposes, instead of in order to limit the scope of the invention.Be understandable that, the antenna 1000 that the embodiment of the present invention provides goes for multiple communications band.
The embodiment of the present invention additionally provides a kind of antenna matching unit, this antenna matching unit is between load circuit and the feedback point of antenna, for mating the output impedance of antenna and the input impedance of load circuit, wherein load circuit can the action such as executive communication or control under the excitation of the signal energy from antenna.
Antenna matching unit comprises at least one antenna element, the antenna element provided in the embodiment that wherein antenna element is first aspect present invention, is connected or coupled modes connection between antenna element by wire.Wherein, wire connects for direct contact type connects, and coupled modes connect for non-direct contact type connects.
In one embodiment of the invention, can be connected by following three kinds of modes between antenna element: series, parallel or string the series-parallel connection of mixing.
The antenna matching unit of the embodiment of the present invention is made by metallization mode.In one embodiment of the invention, antenna matching unit can pass through flexible printed circuit board (Flexible Printed Circuit, FPC) and make, and is attached to by can on the support made of injected plastics material.But it should be noted that, above-mentioned flexible printed circuit board is for exemplary purposes, instead of in order to limit the scope of the invention.Be understandable that, the antenna matching unit that the embodiment of the present invention provides can be made by any metallization mode.
In one embodiment of the invention, the multiple antenna elements in antenna matching unit can be the antenna element 100 provided in first embodiment of the invention.Wherein, adjacent antenna element 100 can a public comb body.
As from the foregoing, in the antenna matching unit of the embodiment of the present invention comprise at least one as the antenna element 100 in first embodiment of the invention, both can carrying out being combined to form antenna matching unit with having other antenna elements mutually isostructural with this antenna element 100, also can carry out being combined to form antenna matching unit with other antenna elements of this antenna element 100 different structure with having.
In one embodiment of the invention, the output impedance of antenna element 100 that the antenna matching unit that provides of the embodiment of the present invention provides for embodiment is to the first aspect of the present invention mated with the input impedance of corresponding load circuit.Antenna matching unit antenna element 100 and the load circuit corresponding with antenna element 100 and between.Antenna matching unit can be connected with antenna element 100 by following three kinds of modes: series, parallel or string the series-parallel connection mixed.
In yet another embodiment of the present invention, the antenna matching unit that the embodiment of the present invention provides mates with the input impedance of corresponding load circuit for the output impedance of the antenna 1000 provided second aspect present invention embodiment.Antenna matching unit is between antenna 1000 and the load circuit corresponding with antenna 1000.Antenna matching unit can by following three kinds of modes with 1000 to be connected all over the world: series, parallel or string the series-parallel connection mixed.
The antenna element 100 that the antenna matching unit that the embodiment of the present invention provides can provide the above embodiment of the present invention or antenna 1000 carry out impedance matching to reduce the reflection of antenna element 100 or antenna 1000, improve the radiance of antenna element 100 or antenna 1000.
The antenna matching unit that the embodiment of the present invention provides may be used on multiple communications band.Below for mobile terminal (such as mobile phone), the function of antenna matching unit in the lifting of resonance point efficiency of the embodiment of the present invention is described.
For GSM900 frequency range, when the mobile terminal of this band operation does not adopt the antenna matching unit of the embodiment of the present invention, antenna resonance point return loss RL=-5.2dB, resonance point efficiency is 60%.Comparatively speaking, when the mobile terminal of this band operation adopts the antenna matching unit of the embodiment of the present invention, antenna resonance point return loss is RL=-11dB, and return loss (RL) has the lifting of more than 5dB, resonance point improved efficiency 1.2dB, resonance point improved efficiency is 91%.As from the foregoing, the antenna matching unit adopting the embodiment of the present invention to provide can reduce the reflection of antenna effectively, improves the radiance of antenna.
But it should be noted that, under above-mentioned GSM900 frequency range, antenna matching unit to the embodiment of the lifting of resonance point efficiency just for exemplary purposes, instead of in order to limit the scope of the invention.Be understandable that, the antenna matching unit that the embodiment of the present invention provides is not limited to above-mentioned frequency range, goes on the antenna of multiple communications band.
According to the antenna matching unit of the embodiment of the present invention, by changing the connected mode between the quantity of antenna element, each antenna element, thus the matched impedance of adjustment antenna matching unit is to mate the output impedance of antenna and the input impedance of load circuit, thus the energy loss in minimizing Signal transmissions, improve the quality of Signal transmissions.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.
Claims (21)
1. an antenna element, is characterized in that, comprising:
First pectinate texture, multiple first comb that described first pectinate texture comprises the first comb body and extends from the side of described first comb body, described multiple first comb is arranged spaced apart to limit multiple first comb seam along the length direction of described first comb body;
Second pectinate texture, multiple second comb that described second pectinate texture comprises the second comb body and extends from the side of described second comb body, described multiple second comb is arranged spaced apart to limit multiple second comb seam along the length direction of described second comb body;
3rd pectinate texture, multiple 3rd comb that described 3rd pectinate texture comprises the 3rd comb body and extends from the side of described 3rd comb body, described multiple 3rd comb is arranged spaced apart to limit multiple 3rd comb seam along the length direction of described 3rd comb body; With
4th pectinate texture, multiple 4th comb that described 4th pectinate texture comprises the 4th comb body and extends from the side of described 4th comb body, described multiple 4th comb is arranged spaced apart to limit multiple 4th comb seam along the length direction of described 4th comb body,
Wherein said first to fourth pectinate texture is arranged spaced apart in the horizontal direction, it is spaced that described multiple first comb is inserted in the vertical direction between the first and second comb in described multiple second comb seam and adjacent respectively, it is spaced that described multiple 3rd comb is inserted in the vertical direction between the third and fourth comb in described multiple 4th comb seam and adjacent respectively
The lower end of wherein said first comb body is connected with the lower end of described 3rd comb body, and the upper end of described second comb body is connected with the upper end of described 4th comb body, and the lower end of described second comb body is connected with the upper end of described 3rd comb body,
At least one pectinate texture of described first to fourth pectinate texture is provided with at least one distributing point,
The lower end of described first comb body and in the vertical direction concordant in the horizontal direction with the lower end of described 3rd comb body extends downward beyond the lower end of described second comb body, the upper end of described second comb body and in the vertical direction concordant in the horizontal direction with the upper end of described 4th comb body extends upwardly beyond the upper end of described 3rd comb body, the upper end in the vertical direction of described first comb body extends upwardly beyond the upper end of described second comb body, and the lower end in the vertical direction of described 4th comb body extends downward beyond the lower end of described first comb body.
2. antenna element as claimed in claim 1, it is characterized in that, described distributing point is with direct way of contact feed or coupled modes feed.
3. antenna element as claimed in claim 1, it is characterized in that, described antenna element comprises one or more earth point, and described earth point is located at least one pectinate texture in described first to fourth pectinate texture.
4. antenna element as claimed in claim 1, it is characterized in that, the width of described first to fourth comb is equal and length is equal, and the width of described first to fourth comb seam is equal and length is equal.
5. antenna element as claimed in claim 4, it is characterized in that, described first to fourth comb is rectangle.
6. antenna element as claimed in claim 1, it is characterized in that, the width of described first to fourth comb body is identical.
7. antenna element as claimed in claim 1, it is characterized in that, the width of described 4th comb body, the width of described first comb body, the width of described 3rd comb body and the width of described second comb body reduce successively.
8. antenna element as claimed in claim 1, it is characterized in that, the lower end of described first comb body is connected by the first strip connecting portion with the lower end of described 3rd comb body, the upper end of described second comb body is connected by the second strip connecting portion with the upper end of described 4th comb body, and the lower end of described second comb body is connected by Article 3 shape connecting portion with the upper end of described 3rd comb body.
9. antenna element as claimed in claim 8, it is characterized in that, the width of described second strip connecting portion is greater than the width of described first and Article 3 shape connecting portion.
10. antenna element as claimed in claim 8, it is characterized in that, described Article 3 shape connecting portion comprises multiple linkage section, and described multiple linkage section is connected successively, and the lower end of described second comb body is connected with the upper end of described 3rd comb body through the described multiple linkage section be connected successively.
11. antenna elements as claimed in claim 10, it is characterized in that, described Article 3 shape connecting portion comprises the first linkage section to the 7th linkage section, the left end of wherein said first linkage section is connected with the lower end of described second comb body and extends to the right in the horizontal direction; the lower end of described second linkage section is connected with the right-hand member of described first linkage section and the upper end edge vertical direction of described second linkage section upwards extends, the right-hand member of described 3rd section of the 3rd linkage section is connected with the upper end of described second segment second linkage section and the left end of described 3rd section of the 3rd linkage section extends left in the horizontal direction, the upper end of described 4th section of the 4th linkage section be connected with the left end of described 3rd section of the 3rd linkage section and the lower end edge vertical direction of described 4th section of the 4th linkage section to downward-extension, the right-hand member of described 5th section of the 5th linkage section is connected with the lower end of described 4th section of the 4th linkage section and the left end of described 5th section of the 5th linkage section extends left in the horizontal direction, the lower end of described 6th section of the 6th linkage section is connected with the left end of described 5th section of the 5th linkage section and the upper end edge vertical direction of described 6th section of the 6th linkage section upwards extends, the left end of described 7th section of the 7th linkage section is connected with the upper end of described 6th section of the 6th linkage section and the right-hand member of described 7th section of the 7th linkage section extends to the right in the horizontal direction and is connected with the upper end of described 3rd comb body.
12. antenna elements as claimed in claim 1, it is characterized in that, the lower end of described first comb body is connected by the first strip connecting portion with the lower end of described 3rd comb body, the upper end of described second comb body is connected by the second strip connecting portion with the upper end of described 4th comb body, and described second comb body and described 3rd comb body share a comb body.
13. antenna elements as claimed in claim 1, it is characterized in that, comprise feed stripes further, the right-hand member of described feed stripes be connected with the lower end of described 4th comb body and the left end of described feed stripes extend in the horizontal direction and concordant with the lower end in the vertical direction of described first comb body be used as distributing point.
14. 1 kinds of antennas, it is characterized in that, described antenna comprises multiple antenna element, at least one in described multiple antenna element antenna element according to any one of claim 1-13, wherein, connected by wire between described antenna element or coupled modes connect.
15. antennas as claimed in claim 14, is characterized in that, are connected between described antenna element by following three kinds of modes: series, parallel or string the series-parallel connection of mixing.
16. antennas as claimed in claim 14, it is characterized in that, described multiple antenna element is the antenna element according to any one of claim 1-13.
17. 1 kinds of antenna matching units, is characterized in that, described antenna matching unit between load circuit and the feedback point of antenna, for mating with the input impedance of described load circuit the output impedance of described antenna,
Described antenna matching unit comprises the antenna element according to any one of at least one claim 1-13, is connected or coupled modes connection between wherein said antenna element by wire.
18. antenna matching units as claimed in claim 17, is characterized in that, are connected between described antenna element by following three kinds of modes: series, parallel or string the series-parallel connection of mixing.
19. antenna matching units as claimed in claim 17, it is characterized in that, described multiple antenna element is the antenna element according to any one of claim 1-13.
20. antenna matching units as claimed in claim 17, it is characterized in that, described antenna matching unit is used for mating with the input impedance of corresponding load circuit the output impedance of the antenna element according to any one of claim 1-13, wherein, described antenna matching unit is connected by following three kinds of modes with described antenna element: series, parallel or string the series-parallel connection mixed.
21. antenna matching units as claimed in claim 17, it is characterized in that, described antenna matching unit is used for mating with the input impedance of corresponding load circuit the output impedance of the antenna according to any one of claim 14-16, wherein, described antenna matching unit is connected by following three kinds of modes with described antenna: series, parallel or string the series-parallel connection mixed.
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| CN201110204084.7A CN102891352B (en) | 2011-07-19 | 2011-07-19 | Antenna unit, antenna and antenna matching device with antenna unit |
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| CN201110204084.7A CN102891352B (en) | 2011-07-19 | 2011-07-19 | Antenna unit, antenna and antenna matching device with antenna unit |
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| CN201222536Y (en) * | 2008-07-17 | 2009-04-15 | 上海联能科技有限公司 | Terminal antenna based on composite second self transmission line |
| CN101546856A (en) * | 2008-03-27 | 2009-09-30 | 中国科学院物理研究所 | Planar superconducting microstrip resonator |
| DE102009018834A1 (en) * | 2008-12-18 | 2010-06-24 | Mitsumi Electric Co., Ltd., Tama | antenna device |
| CN101911388A (en) * | 2008-01-08 | 2010-12-08 | Ace技术株式会社 | Multi-band internal antenna |
| CN202159764U (en) * | 2011-07-19 | 2012-03-07 | 深圳市信维通信股份有限公司 | Antenna unit, antenna with same and antenna matching device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1818565A (en) * | 2005-02-07 | 2006-08-16 | 鑫发奈米科技股份有限公司 | Long-distance humidity monitoring system |
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| CN101911388A (en) * | 2008-01-08 | 2010-12-08 | Ace技术株式会社 | Multi-band internal antenna |
| CN101546856A (en) * | 2008-03-27 | 2009-09-30 | 中国科学院物理研究所 | Planar superconducting microstrip resonator |
| CN201222536Y (en) * | 2008-07-17 | 2009-04-15 | 上海联能科技有限公司 | Terminal antenna based on composite second self transmission line |
| DE102009018834A1 (en) * | 2008-12-18 | 2010-06-24 | Mitsumi Electric Co., Ltd., Tama | antenna device |
| CN202159764U (en) * | 2011-07-19 | 2012-03-07 | 深圳市信维通信股份有限公司 | Antenna unit, antenna with same and antenna matching device |
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