CN1841845A - Broad band antenna - Google Patents
Broad band antenna Download PDFInfo
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- CN1841845A CN1841845A CN 200610003289 CN200610003289A CN1841845A CN 1841845 A CN1841845 A CN 1841845A CN 200610003289 CN200610003289 CN 200610003289 CN 200610003289 A CN200610003289 A CN 200610003289A CN 1841845 A CN1841845 A CN 1841845A
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Abstract
Provided is a compact and light broad range antenna apparatus transmitting and receiving an electric wave in GHz frequency band (wavelength: lambda), a flat shaped antenna element ( 10 ), where a length b' in an X-axis direction is less than lambda/4 and a length a' in a Y-axis direction is less than lambda/4, is arranged at a distance j less than lambda/4 from a ground plate ( 2 ) in the Y-axis direction and connected to a high-frequency power source ( 9 ), and an enlarged flat shaped parasitic element ( 15 ) is structured by connecting a base portion ( 13 ) having approximately the same shape and dimension as those of the antenna element ( 10 ) with an extension portion ( 14 ) extending from the base portion ( 13 ) in the X-axis direction so as to face to the antenna element ( 10 ) with a distance, and connected conductively with the ground plate ( 2 ) by a ground line ( 5 ).
Description
Technical field
The present invention relates to be used to send the antenna assembly of the electric wave that receives the GHz frequency band, the present invention is particularly small-sized, carries out improved invention according to the mode that obtains broadband character.
Background technology
Formation is to carry standing wave by the lines antenna with the basic principle of the technology of the antenna of the radio wave resonance of GHz band.
Because the size of antenna is less, so above-mentioned lines antenna is known for people according to the technology that 1/4 mode that resonates with wavelength X constitutes.In this occasion, the mechanical length of lines antenna is about λ/4.
No matter be not limited to electric wave, be string, bar, gas, according to the integral multiple resonance (sympathetic response) of λ/4, if special structure is not set, then do not resonate in the occasion less than λ/4 basically.
In order further to shorten the antenna of λ/4, make the lines antenna be bent to form helical form, or it is known to make its alternating bending be the technology of meander-like (zigzag), but, no matter how crooked, basic principle according to λ/4 resonance is all identical, and the electrical length of antenna element, mechanical length still do not have less than the technical conceive of λ/4.
Patent documentation 1:JP spy opens flat 6-140820 document
Patent documentation 3:JP spy opens the 2003-304114 document
Non-patent literature 1: the オ of Co., Ltd.-distribution ア of Le society Application テ ノ engineering Ha Application De Block Star Network electronic information communication association compiles
Follow the prosperity of portable phone, WLAN (local area network (LAN)) technology, planning UWB (Ultra Wide Band) wireless system.
People require the tuning characteristic of the antenna that sends the electric wave that receives the GHz frequency band is carried out the broadband processing, and reduce size, weight reduction.
The present invention be directed to above-mentioned situation and propose, the object of the present invention is to provide compared with the prior art, have broadband character, and little, the lightweight GHz frequency band of size antenna assembly.
Summary of the invention
To achieve these goals and the design antenna assembly of the present invention in, if near according to can adopt in the past can not be tuning mode less than the antenna element of λ/4 design, such as, cubical antenna element place, the essentially identical non-power supply component of size is set, even then with the contraction in length on 1 limit under the situation of λ/8, still obtain good antenna performance (2 or following VSWR value and the frequency band of broad).Above-mentioned cube deformability, can be cuboid or three-dimensional shape similar with it.
If shorten the back of above-mentioned cubical antenna element, it is tabular to be square, even then still obtain good antenna performance at the contraction in length with 1 limit under the situation of λ/4.Above-mentioned square deformability can be rectangle or similar flat parts with it.
Above-mentioned broad frequency band with non-power supply component and be made as condition and obtain.Thus,, form antenna element and non-power supply component, constitute the antenna assembly assembly, then use easily, practical value is higher with embedded mode if in 1 less resin component.
Description of drawings
Fig. 1 is the schematic stereogram of the antenna assembly of explanation the 1st tentative program;
Fig. 2 is the VSWR (voltage standing wave ratio: figure voltagestanding wave ratio) of above-mentioned the 1st tentative program;
Fig. 3 is the schematic stereogram of the 1st contrive equipment (claim 1);
Fig. 4 is the VSWR figure of the 1st contrive equipment;
Fig. 5 is the distortion example of above-mentioned the 1st contrive equipment of expression and the stereogram of the 2nd tentative program (claim 2);
Fig. 6 is the VSWR figure of above-mentioned the 2nd tentative program shown in Figure 5;
The schematic vertical view that Fig. 7 uses for explanation the 2nd contrive equipment;
Fig. 8 is the vertical view of the concrete structure of above-mentioned the 2nd contrive equipment (claim 3) of explanation;
Fig. 9 is the VSWR figure of above-mentioned the 2nd contrive equipment of explanation;
Figure 10 is the schematic stereogram of 1 embodiment of explanation the 3rd contrive equipment (claim 4);
Figure 11 is the exploded perspective view and the assembling stereogram of the distortion example of above-mentioned the 3rd contrive equipment of expression.
Embodiment
Fig. 1 is used to form the stereogram of tentative program of the process of the research of invention for explanation in a schematic way.In order to distinguish mutually, this figure is called the 1st tentative program with other tentative program described later.
The wavelength that should send the electric wave of reception is represented by λ.
For convenience of explanation, suppose perpendicular 3 that constitute by the trunnion axis X parallel, along the axle Y of the face of ground plate 2 and vertical axis Z with the edge of ground plate 2.
The rectangular-shaped antenna element of label 1 expression, the length b on the length a on 1 limit of Y direction, 1 limit of X-direction, the size h of Z-direction are equal substantially, all less than λ/8.That is, a b h＜λ/8 are approaching cubical cuboid.
Since the wavelength of the electric wave of the GHz band to picture of the present invention such as, for the occasion of 3GHz is about 10cm,, compare very little with existing example so it 1/8 is that 1cm is strong.
According to the mode that the edge with ground plate 2 leaves with the j size along the Y direction, above-mentioned rectangular-shaped antenna element 1 is set, be connected with high frequency electric source 9 by coaxial cable 3.Above-mentioned size j is less than λ/8.
Fig. 2 represents the VSWR of the antenna assembly of above-mentioned tentative program.Know in the scope of 4～6GHz, to have the frequency band of broad.
But, such as, if be used for WLAN,,, preferably enlarge to lower frequency side (left among the figure) so compare with characteristic shown in Figure 2 owing to must be able to launch the electric wave that receives 2.4GHz.
Therefore, the inventor improves the antenna scheme of aforesaid the 1st tentative program shown in Figure 1, has conceived the 1st invention shown in Figure 3.In the 1st invention, rectangular-shaped non-power supply component 4 is set according to mode with rectangular-shaped antenna element 1 adjacency of formerly describing.
The geomery of this rectangular-shaped non-power supply component 4 is according to setting with rectangular-shaped antenna element 1 similar mode.This rectangular-shaped non-power supply component 4 is connected conducting by earth connection 5 with ground plate 2.
Between rectangular-shaped antenna element 1 and the rectangular-shaped non-power supply component 4 apart from i less than λ/8.
Fig. 4 represents the VSWR of above-mentioned Fig. 3 (the 1st invention).If the VSWR of itself and aforesaid Fig. 2 (the 1st tentative program) is contrasted, then can be regarded as " by rectangular-shaped non-power supply component 4 is set, the frequency band of tuned frequency enlarges to lower frequency side ".
Fig. 5 is aforementioned the 1st distortion example of inventing shown in Figure 3 of explanation and the figure of improvement example, and arrow A is represented 1 embodiment of the antenna assembly of above-mentioned the 1st invention.Even as arrow u, make under the situation of above-mentioned the 1st inventive embodiment A distortion, still obtain identical action effect.That is, even making rectangular-shaped antenna element 1 distortion, form under the situation of cylindric antenna element 7, action effect is also identical if size is basic identical.
In addition, even making rectangular-shaped non-power supply component 4 distortion, form under the situation of cylindric non-power supply component 8, action effect is also basic identical if its profile is identical.
As according to viewpoint and understand easily, the 1st " cuboid " invented can be deformed into " shape of the essentially identical solid of size ", also can make it be hollow form, they include in technical scope of the present invention (Patent right scope).
If as arrow v, above-mentioned the 1st inventive embodiment A is improved, then near the 2nd invention (,, representing) by arrow B so be called " the 2nd tentative program " owing to do not reach the 2nd invention as yet.
That is,, be tabular and make its distortion, then form tabular antenna element 10,, make it be deformed into tabular, then form the non-power supply component 11 of tabular if reduce the back of rectangular-shaped non-power supply component 4 if reduce the back of rectangular-shaped antenna element 1.
The 2nd tentative program overlook figure and above-mentioned the 1st the invention (Fig. 3) similar.If watch it, then form short transverse structure as thin as a wafer in three-dimensional mode.
That is, the edge of tabular antenna element 10 and ground plate 2, spaced apart along Y direction with the distance of j＜λ/4, or the distance between tabular antenna element 10 and the non-power supply component 11 of tabular is i＜λ/4.
The VSWR image pattern 6 of the antenna assembly of above-mentioned the 2nd tentative program is such.
Present the tuning characteristic of broad at the GHz frequency band, still, it's a pity can not be tuning at the lower frequency side of 3GHz.Therefore,, further above-mentioned the 2nd tentative program is improved, frequency band is enlarged to lower frequency side as following.
What the arrow B among Fig. 7 was represented is the vertical view of the antenna assembly of the 2nd tentative program of arrow B indication in the earlier figures 5.In the 2nd tentative program B, the non-power supply component 11 of tabular antenna element 10 and tabular is according to being coupled with electrostatic capacitance in the face of isolated mode, still, according to this coupling more closely mode as arrow C, improve.
That is, according in the non-power supply component 11 of tabular, with tabular antenna element 10 in the face of and mode that the length on isolated limit is extended is provided with non-power supply component extension 12 (add parallel oblique line and represent).
But the length on 1 limit of aforesaid rectangular-shaped antenna element 1 is λ/8, still, the back reduction of rectangular-shaped element is improved to flat component, consequently, be difficult to the length on rectangular 1 limit is narrowed down to λ/8, the length on rectangular 1 limit is fit to less than λ/4.But, in prior art, because crooked or bending can't be less than λ/4 with antenna element, so by the scheme shown in the symbol D among Fig. 7, " making is less than the antenna element of λ/4 " significant.
This scheme (being represented by the arrow D among Fig. 7) is the 2nd invention.
Fig. 8 is the concrete vertical view of the antenna assembly of above-mentioned the 2nd invention.The symbol 10 expressions tabular antenna element identical with the 2nd tentative program.
In the basic portion 13 identical with the non-power supply component of the tabular of the 2nd tentative program 11, be integral with non-power supply component extension 12 by Fig. 7 explanation and identical extension 14 and be connected, constitute and enlarge the non-power supply component 15 of tabular.
For convenience of explanation, as illustrated, suppose vertical coordinate axle X, Y.
The Y direction length of symbol a ' expression tabular antenna element 10 is less than λ/4.
The X-direction length of symbol b ' expression tabular antenna element 10 is less than λ/4.
Symbol c represents the X-direction length of basic portion 13, less than λ/4.Symbol d represents the Y direction length of basic portion 13, less than λ/4.Symbol e represents the length of the X-direction of extension 14.Its size will specifically describe in the back.
Symbol f represents the length of the Y direction of extension 14, f＜d.
Symbol i represents tabular antenna element 10 and enlarges the X-direction spacing of the non-power supply component 15 of tabular that i is sufficiently less than e.
In above-mentioned various sizes, to antenna performance influence bigger be the X-direction length e of extension 14.
Fig. 9 represents that with above-mentioned size e be parameter, the VSWR during according to 3mm, 5mm, 7mm variation.
Know " follow the increase of above-mentioned size e, tuning frequency band enlarges to lower frequency side " therefrom.
Implementing occasion of the present invention, can suitably set above-mentioned size e corresponding to required antenna performance.
In aforementioned the 1st invention and the 2nd invention,, obtain required antenna performance by side by side with antenna element and non-power supply component.
In the 1st invention (the symbol A among Fig. 5), the configuration relation of rectangular-shaped antenna element 1 and rectangular-shaped non-power supply component 4 is important, in the 2nd invention (Fig. 8), the configuration relation of tabular antenna element 10 and the non-power supply component 15 of expansion tabular is important.
According to such consideration, preferably with antenna element and non-power supply component side by side, it is sealed in the resin component.It is the 3rd invention.
Figure 10 is 1 embodiment of the 3rd invention.
Rectangular-shaped antenna element 1 and rectangular-shaped non-power supply component 4 are formed in the resin component 16 with embedded mode.In rectangular-shaped antenna element 1, supply lines 18 is set, in rectangular-shaped non-power supply component 4, earth connection 19 is set.
On the other hand, ground plate 2 is set on circuitry substrate 6, and the empty k of portion of residual installation resin component 16.
If resin component 16 is arranged at the empty k of portion of circuitry substrate 6, then supply lines 18 contacts with microstrip line 17 as arrow m, receives power supply from high frequency electric source 9, and earth connection 19 is as arrow n, contacts with earth connection 5 and realizes conducting.
As with the different embodiment of above-mentioned (Figure 10's) embodiment, preferably with the tabular antenna element 10 of the 2nd invention (Fig. 8) with enlarge the inside that the non-power supply component 15 of tabular is sealingly fastened in resin mass, though omit about the diagram of this point.
Figure 11 is aforesaid the 3rd distortion example of inventing shown in Figure 10, and the left side of figure half is an exploded perspective view, and the right side of figure half is an assembling stereogram.
(with reference to the left side) is provided with tabular antenna element 10 and amplifies the non-power supply component 15 of tabular about substrate chip 21.These elements are and aforesaid identical parts shown in Figure 8.
Suppose and X-axis shown in Figure 8 and the perpendicular Z axle of Y-axis,, through hole 20 is set along this Z axle and Z ' axle with the Z ' axle parallel with its (Z axle).This through hole is for electroplating the mechanism that mutual conduction is used in the step of back.
As by shown in the arrow w, assembling, form antenna assembly assembly parts 22.
In said antenna device assembly parts 22,, use so can replace the resin mass 16 of Figure 10 because tabular antenna element 10 and the non-power supply component 15 of amplification tabular are located mutually.
In addition, owing to tabular antenna element 10 and each respectively 2 ground of the amplification non-power supply component 15 of tabular are arranged and mutual conduction up and down, so can obtain good antenna performance.
Claims (5)
1. GHz frequency band antenna assembly, this GHz frequency band antenna assembly are the antenna assembly that sends the electric wave that receives wavelength X, it is characterized in that:
Set perpendicular 3 axle X, Y, Z, these 3 axle X, Y, Z comprise X-axis parallel with the edge of ground plate and Y-axis along the face of ground plate;
" the size a of Y direction＜λ/8, the size b of X-direction＜λ/8, the rectangular-shaped antenna element of the size h of Z-direction＜λ/8 " according to the edge of above-mentioned ground plate along Y direction, be provided with in the isolated mode in spacing j＜λ/8;
And according to this rectangular-shaped antenna element, in the isolated mode in spacing i＜λ/8 " the essentially identical rectangular-shaped non-power supply antenna element of its geomery and above-mentioned rectangular-shaped antenna element " is set, above-mentioned tabular antenna element is connected conducting with high frequency electric source, and the non-power supply component of tabular is connected conducting with ground plate.
2. GHz frequency band antenna assembly, this GHz frequency band antenna assembly are the antenna assembly that sends the electric wave that receives wavelength X, it is characterized in that:
Set perpendicular 3 axle X, Y, Z, these 3 axle X, Y, Z comprise X-axis parallel with the edge of ground plate and Y-axis along the face of ground plate;
" the size a of Y direction＜λ/4, the tabular antenna element of the size b of X-direction＜λ/4 " according to the edge of above-mentioned ground plate along Y direction, be provided with in the isolated mode in spacing j＜λ/4;
And according to this tabular antenna element, in the isolated mode in spacing i＜λ/4 " its geomery and the non-power supply component of the essentially identical tabular of above-mentioned tabular antenna element " is set, above-mentioned tabular antenna element is connected conducting with high frequency electric source, and the non-power supply component of tabular is connected conducting with ground plate.
3. GHz frequency band antenna assembly, this GHz frequency band antenna assembly are the antenna assembly that sends the electric wave that receives wavelength X, it is characterized in that:
Set perpendicular 3 axle X, Y, Z, these 3 axle X, Y, Z comprise X-axis parallel with the edge of ground plate and Y-axis along the face of ground plate;
" the size a of Y direction＜λ/4, the tabular antenna element of the size b of X-direction＜λ/4 " according to the edge of above-mentioned ground plate along Y direction, be provided with in the isolated mode in spacing j＜λ/4;
And according to this tabular antenna element, in the isolated mode in spacing i＜λ/4 " its geomery and the non-power supply component of the essentially identical tabular of above-mentioned tabular antenna element " is set; And,
According to the non-power supply component of above-mentioned tabular along X-direction, with above-mentioned tabular antenna element in the face of the isolated mode in ground, non-power supply component extension extends, and forms to enlarge the non-power supply component of tabular;
Above-mentioned tabular antenna element is connected conducting with high frequency electric source, enlarges the non-power supply component of tabular and is connected conducting with ground plate.
4. GHz frequency band antenna assembly according to claim 1 is characterized in that rectangular-shaped antenna element and rectangular-shaped non-power supply antenna element are formed at the inside of 1 resin mass with embedded mode; And,
In above-mentioned rectangular-shaped antenna element, supply lines is set, in rectangular-shaped non-power supply antenna element, earth connection is set.
5. GHz frequency band antenna assembly, this GHz frequency band antenna assembly are the antenna assembly that sends the electric wave that receives wavelength X, it is characterized in that:
Set perpendicular 3 axle X, Y, Z;
2 " the size a of Y direction＜λ/4, the tabular antenna elements of the size b of X-direction＜λ/4 " are provided with according to the mode that contacts with the two sides of substrate chip; And,
According to above-mentioned 2 tabular antenna elements respectively in the isolated mode in spacing i＜λ/4, " its geomery and above-mentioned tabular antenna element are essentially identical, altogether 2 non-power supply components of tabular " is set;
And, in each of above-mentioned 2 non-power supply components of tabular, be provided with " extend along X-direction, with above-mentioned tabular antenna element in the face of and isolated extension ", constitute and enlarge the non-power supply component of tabular.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005090843A JP4611783B2 (en) | 2005-03-28 | 2005-03-28 | Broadband antenna device |
| JP2005090843 | 2005-03-28 | ||
| JP2005269521 | 2005-09-16 | ||
| JP2005342471 | 2005-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1841845A true CN1841845A (en) | 2006-10-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610003289 Pending CN1841845A (en) | 2005-03-28 | 2006-02-08 | Broad band antenna |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4611783B2 (en) |
| CN (1) | CN1841845A (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4545665B2 (en) * | 2005-09-16 | 2010-09-15 | 三省電機株式会社 | Broadband antenna and configuration method of wideband antenna |
| JP4611872B2 (en) * | 2005-11-28 | 2011-01-12 | 三省電機株式会社 | Chip-shaped broadband antenna and manufacturing method thereof |
| JP2008153816A (en) * | 2006-12-15 | 2008-07-03 | Nippon Antenna Co Ltd | Antenna and antenna system |
| US7671817B2 (en) * | 2007-02-27 | 2010-03-02 | Sony Ericsson Mobile Communications Ab | Wideband antenna |
| EP2140517A1 (en) | 2007-03-30 | 2010-01-06 | Fractus, S.A. | Wireless device including a multiband antenna system |
| US8325095B2 (en) | 2007-08-10 | 2012-12-04 | Panasonic Corporation | Antenna element and portable radio |
| WO2009022385A1 (en) | 2007-08-10 | 2009-02-19 | Panasonic Corporation | Antenna element and portable radio device |
| WO2010015364A2 (en) | 2008-08-04 | 2010-02-11 | Fractus, S.A. | Antennaless wireless device capable of operation in multiple frequency regions |
| CN102084542B (en) | 2008-08-04 | 2014-01-22 | 弗拉克托斯股份有限公司 | Antennaless wireless device capable of operation in multiple frequency regions |
| JP5631374B2 (en) * | 2012-10-31 | 2014-11-26 | 株式会社フジクラ | antenna |
| US10062973B2 (en) | 2013-06-20 | 2018-08-28 | Fractus Antennas, S.L. | Scattered virtual antenna technology for wireless devices |
| ES2973383T3 (en) | 2014-07-24 | 2024-06-19 | Ignion S L | Slim radiation systems for electronic devices |
| US10199730B2 (en) | 2014-10-16 | 2019-02-05 | Fractus Antennas, S.L. | Coupled antenna system for multiband operation |
| US10224631B2 (en) | 2015-03-27 | 2019-03-05 | Fractus Antennas, S.L. | Wireless device using an array of ground plane boosters for multiband operation |
| US10122403B2 (en) | 2016-01-12 | 2018-11-06 | Fractus Antennas, S.L. | Wireless device |
| US10008762B2 (en) | 2016-01-22 | 2018-06-26 | Fractus Antennas, S.L. | Wireless device including optimized antenna system on metal frame |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1654108A (en) * | 1926-03-19 | 1927-12-27 | Peter P Stone | Radioantenna |
| US3358286A (en) * | 1964-08-13 | 1967-12-12 | Eggud Electronics Inc | Small cylindrical stub antenna with loading capacitance |
| JP2001284948A (en) * | 2000-04-03 | 2001-10-12 | Smk Corp | Antenna unit |
| JP2001292020A (en) * | 2000-04-07 | 2001-10-19 | Smk Corp | Antenna unit |
| JP4105987B2 (en) * | 2003-06-24 | 2008-06-25 | 京セラ株式会社 | Antenna, antenna module, and wireless communication apparatus including the same |
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2005
- 2005-03-28 JP JP2005090843A patent/JP4611783B2/en active Active
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2006
- 2006-02-08 CN CN 200610003289 patent/CN1841845A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP4611783B2 (en) | 2011-01-12 |
| JP2006279159A (en) | 2006-10-12 |
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Open date: 20061004 |