CN1819337A - Improved planar reversing-F shaped built-in antenna of cell phone - Google Patents
Improved planar reversing-F shaped built-in antenna of cell phone Download PDFInfo
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- CN1819337A CN1819337A CN 200610066983 CN200610066983A CN1819337A CN 1819337 A CN1819337 A CN 1819337A CN 200610066983 CN200610066983 CN 200610066983 CN 200610066983 A CN200610066983 A CN 200610066983A CN 1819337 A CN1819337 A CN 1819337A
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Abstract
The invention includes a metal conductor and a holder for holding said metal conductor. The metal conductor comprises a main body of antenna and a feed point and a ground point formed by bending the main body down. The feed point and ground point are respectively connected to the feed point and GND on motherboard of mobile phone. The main body is a conducting bypass comprising a straight line portion, a buckling portion and a terminal with the shape like the Chinese character 'hui'. The beginning end of the straight line portion is connected to the feed point and the ground point, and an open slot is formed between the both of them. In the straight line portion and buckling portion, there are multi enclosed slots. The invention can make mobile phone in low frequency to adopt built-in antenna.
Description
Technical field:
The present invention relates to a kind of mobile terminal antenna, relate in particular to a kind of built-in antenna of cell phone that is applied to the plane inverse F type of low-frequency range (for example 450MHz to 470MHz).
Background technology:
Antenna for mobile phone comprises external and built-in two kinds, because advantage such as that built-in antenna has is attractive in appearance, mobile phone is easy to carry, antenna was not fragile when mobile phone fell, thereby is adopted by increasing mobile phone.Built-in antenna comprises reversed F-typed (PIFA) flat plane antenna and monopole (or spiral) antenna that is similar to the external antenna technology at present, and wherein inverted F type plane antenna adopts comparatively general.
For the CDMA mobile phone, it comprises three working frequency range, is respectively 450M, 800M, 1900M.The mobile phone of 800M and 1900M working frequency range wherein, built-in antenna are easier to realize; But the antenna for mobile phone of 450M, because its operating frequency is low, wavelength is longer, and built-in antenna (especially inverted F type plane antenna) is therefore realized very difficulty of high performance low-frequency range (450M) built-in aerial because the restriction in its volume and space is difficult to realization and the electrical length that its wavelength is complementary.So this low-frequency range mobile phone that can see in the market all adopts the external antenna.
The CN2502417 China utility model patent of China national Department of Intellectual Property Granted publication on July 24th, 2002, a kind of double frequency or multi-frequency plane inverted F shaped antenna are disclosed, it is provided with the area of the inner installing space of a cooperating equipment and the planar antenna of metal of shape in ground plane top, the lamellar body of this metal covering has one with a common blind end and the open end that constituted of fluting, and is separated into a long section part and and lacks section portion; The short dot of this metal covering and load point can cooperate frequency to adjust the position to obtain required impedance matching; Short dot is to the length of the long section part and the extremely short section of the shorted segment portion end of grooving open end, and the resonance frequency that is bent fluting cooperation double frequency or multifrequency by distortion is determined.Although this planar inverted F-shape antenna can cooperate the different inner installing space of communication apparatus, form suitable built-in planer dual-frequency or multifrequency PIFA.But, therefore still can't be implemented in the high-performance of low-frequency range because it can not have very long electrical length.
Another piece State Intellectual Property Office November in 2005 Granted publication on the 9th CN2739817 number Chinese utility model patent, disclose a kind of low-frequency range high performance mini circular polarization microstrip antenna, this antenna is made of metallic reflection plate, square medium substrate, square radiation patch, coaxial sub-miniature A connector.Medium substrate is fixed on the certain thickness metallic reflection plate, and square radiation patch is fixed on the medium substrate, and distributing point is positioned on the diagonal axis of square radiation patch; Sub-miniature A connector is fixed in metallic reflection backboard face.Adopt coaxial SF single feed form, by sub-miniature A connector back of the body feedback output.Although this antenna has higher gain performance, because it is a kind of non-planar antennas, thereby complex structure, cost is higher, nor is applicable to the less portable terminal of this volume of mobile phone.
Summary of the invention:
The technical problem to be solved in the present invention is, a kind of improved planar reversing-F shaped built-in antenna of cell phone is provided, this antenna has higher performance at lower working frequency range, the emission and the reception of low frequency signal are realized in energy high-quality, high efficiency, high-gain ground, thereby make low frequency mobile phone (for example CDAM mobile phone of 450M) adopt built-in antenna to become possibility.
According to improved planar reversing-F shaped built-in antenna of cell phone provided by the invention, the carrier that comprises metal conductor portion and the described metal conductor portion of carrying, described metal conductor portion comprises antenna body and the distributing point and the earth point that are bent to form from described antenna body downwards, and described distributing point is connected with GND with the distributing point of cell phone mainboard respectively with earth point; Described antenna body is a conductor branches, comprises the line part that links to each other successively, circuitous kink and back-shaped terminal part, and the initiating terminal of described line part links to each other with earth point with described distributing point, and the position between the two forms an open slot; Described line part and circuitous kink all are formed with a plurality of enclosed slots.
Principle with regard to such scheme of the present invention is described as follows:
The difficulty that realizes the built-in aerial of 450MHz is: because operating frequency of antenna is low, so the electrical length that needs is just long, and the volume of built-in aerial is restricted, and is difficult to realize long electrical length.Main points of the present invention are, utilize intercoupling of straight line portion, bending part and several enclosed slots, and the intercoupling of antenna and ground plane (GND), and make antenna resonance in the frequency range of 450MHz, have realized the built-in antenna of mobile phone of low working frequency range.
Also have following attached technical characterictic according to improved planar reversing-F shaped built-in antenna of cell phone provided by the invention:
Described line part is the straightway that broadens, and it is wide portion with the The initial segment that described distributing point links to each other with earth point, and the terminal part that links to each other with described circuitous kink is narrow portion.
Described line part is formed with three enclosed slots, comprise by described wide portion extend to narrow portion first enclosed slot, described first enclosed slot of next-door neighbour second enclosed slot and be close to the 3rd enclosed slot of described second enclosed slot.
Described first enclosed slot is a bending, and described second enclosed slot and the 3rd enclosed slot are all linearity, and the length of the 3rd enclosed slot is less than half of the described second enclosed slot length.
Described first enclosed slot is the bending structure of similar zigzag, the terminal of the described open slot of its anterior next-door neighbour, and be located on the same line with it; Rear portion and described second enclosed slot and the 3rd enclosed slot are located on the same line; The pars intermedia that connects described front and rear is simultaneously perpendicular to described front and rear.
Described first enclosed slot, second enclosed slot and the 3rd enclosed slot all have identical width with described open slot, and the abutting end of each groove has identical spacing, and this distance is less than 2mm.
Described circuitous kink comprises a plurality of straightways and the end that is connected each described straightway that are parallel to each other and link to each other successively, and each described straightway is perpendicular to described line part and be parallel to described back-shaped terminal part.
Described circuitous kink has two described enclosed slots, comprises the 4th enclosed slot that forms in a described straightway and the 5th enclosed slot that forms in another described straightway.
The length of described the 4th enclosed slot is greater than 15mm, and the length of described the 5th enclosed slot is less than 7mm, and the two all extends along the longitudinal direction of described straightway.
Described circuitous kink also is formed with a conductor branch, and described conductor branch and parallels with each described straightway between adjacent two described straightways, and its end is mutually concordant with the end of described each straightway.
According to improved planar inverted F-shape antenna provided by the invention, because antenna body is a conductor branches, this conductor branches is made of line part and circuitous kink and back-shaped terminal part, thereby under the certain situation of area, farthest prolonged the length of antenna, make its may be complementary with the wavelength of low frequency signal (initiating terminal of first enclosed slot is 1/2 wavelength of 450M frequency signal to the distance of back-shaped terminal part end in the embodiments of the invention, promptly about 30 centimetres); Further, because line part and circuitous kink also are provided with enclosed slot, thereby further increased the electrical length of this antenna, make this antenna be operated in low-frequency range and have higher performance, can not only high-quality, high efficiency, high-gain realize the emission and the acceptance of low frequency signal, can also prolong the signal coverage of the conversation of low frequency mobile phone and stand-by time, expansion low frequency mobile phone, thereby make the low frequency mobile phone adopt built-in aerial to become possibility.
Description of drawings:
Fig. 1 is the schematic perspective view according to improved planar reversing-F shaped built-in antenna of cell phone provided by the invention;
Fig. 2 is the front view of planar reversing-F shaped built-in antenna of cell phone shown in Figure 1.
Embodiment:
According to improved planar reversing-F shaped built-in antenna of cell phone provided by the invention, the carrier (also not shown among the figure) that comprises metal conductor portion and the described metal conductor portion of carrying, described carrier can be FPC (flexible printed circuit board), PCB (printed circuit board (PCB)), independent plastic structural part or terminal casing, described metallic conductor can be the metallic conductor of Copper Foil, plating or printing etc., these are all known technology, repeat no more herein.
Referring to Fig. 1, described metal conductor portion comprises antenna body 1 and the distributing point 2 and the earth point 3 that are bent to form from described antenna body 1 downwards, and described distributing point 2 is connected with GND with the distributing point of cell phone mainboard respectively with earth point 3; The distributing point of cell phone mainboard is positioned at its conductive layer, and GND is the stratum on the cell phone mainboard, and the described distributing point 2 of antenna and earth point 3 are all known technology with the connected mode of cell phone mainboard, do not describe in detail herein.
As shown in Fig. 1,2, in the present invention, described antenna body 1 is a conductor branches, comprise the line part 11 that links to each other successively, circuitous kink 12 and back-shaped terminal part 13, because the bending repeatedly of circuitous kink 12 and constantly bending inwards of back-shaped terminal part 13, and the two all is positioned at the length range of line part 11, therefore under the certain situation of area, the length that the conductor branches of being made up of these three kinds of structures has farthest prolonged antenna body 1 makes the coupling of itself and low-band signal become possibility.The initiating terminal of described line part 11 links to each other with earth point 3 with described distributing point 2, and the position between the two forms an open slot 111; Described line part 11 and circuitous kink 12 all are formed with a plurality of enclosed slots 14, and each described enclosed slot 14 can further increase the electrical length of antenna, thereby improve the performance of antenna when low-frequency range is worked.
As shown in Fig. 1,2, described line part 11 is the straightway that broadens, and it is wide 112 with the The initial segment that described distributing point 2 links to each other with earth point 3, and the terminal part that links to each other with described circuitous kink 12 is narrow 113.Described wide 112 and narrow 's 113 inboard forms the space of ccontaining described back-shaped terminal part 13 and circuitous kink 12 respectively.
As shown in Fig. 1,2, described line part 11 is formed with three described enclosed slots 14, comprises the 3rd enclosed slot 143 that extends to second enclosed slot 142 of first described narrow 113 enclosed slot 141, described first enclosed slot 141 of next-door neighbour and be close to described second enclosed slot 142 by described wide 112.Described first enclosed slot 141 is a bending, and described second enclosed slot 142 and the 3rd enclosed slot 143 are all linearity, and the length of the 3rd enclosed slot 143 (L3 among Fig. 2) is less than half of described second enclosed slot, 142 length (L2 among Fig. 1).As shown in FIG., described first enclosed slot 141 is the bending structure of similar zigzag, the terminal of the described open slot 111 of its anterior next-door neighbour, and be located on the same line with it; Rear portion and described second enclosed slot 142 and the 3rd enclosed slot 143 are located on the same line; The pars intermedia that connects described front and rear is simultaneously perpendicular to described front and rear.Described first enclosed slot 141, second enclosed slot 142 all have identical width with the 3rd enclosed slot 143 with described open slot 111, and the abutting end of each groove has identical spacing, and this distance is less than 2mm.This structural design of each enclosed slot of described line part 11 had both helped increasing the electrical length of antenna, thereby improved the performance of antenna, had made things convenient for again to shape.
As shown in Figure 1, 2, described circuitous kink 12 comprises a plurality of straightways 121 and the end 122 that is connected each described straightway 121 that are parallel to each other and link to each other successively, each straightway 121 is perpendicular to described line part 11 and be parallel to described back-shaped terminal part 13 (" parallel " described herein is meant that straightway 121 and described back-shaped terminal part 13 integral body are arranged in parallel).This structural design of described circuitous kink 12 had both helped prolonging the length of antenna, thereby improved the performance of antenna when low-frequency range is worked, and had made things convenient for again to shape.
As shown in Fig. 1,2, described circuitous kink 12 has two described enclosed slots 14, comprises the 5th enclosed slot 145 that forms in the 4th enclosed slot 144 on the described straightway 121 and form in another described straightway 121.The length of described the 4th enclosed slot 144 is greater than 15mm, and the length of described the 5th enclosed slot 145 is less than 7mm, and the two all extends along the longitudinal direction of described straightway 121.Four, this structural design of the 5th enclosed slot 144,145 is very beneficial for increasing the electrical length of antenna.
As shown in FIG., described circuitous kink 12 also is formed with a conductor branch 123, and described conductor branch 123 and parallels with each described straightway 121 between adjacent two described straightways 121.Its end is mutually concordant with the end of described each straightway.Conductor branch 123 be provided with the performance that is beneficial to further raising antenna, thereby help its high-gain, transmit and receive low frequency signal expeditiously.
Above preferred embodiment is only for the usefulness that the present invention is described; those of ordinary skill in the art under the guide that does not break away from the spirit and scope of the present invention, also can make various distortion and conversion; as more enclosed slot is set, so all equivalent technical solutions all belong to protection scope of the present invention.
Claims (10)
1, a kind of improved planar reversing-F shaped built-in antenna of cell phone, the carrier that comprises metal conductor portion and the described metal conductor portion of carrying, described metal conductor portion comprises antenna body (1) and the distributing point (2) and the earth point (3) that are bent to form from described antenna body (1) downwards, and described distributing point (2) is connected with GND with the distributing point of cell phone mainboard respectively with earth point (3); It is characterized in that: described antenna body (1) is a conductor branches, comprise the line part (11) that links to each other successively, circuitous kink (12) and back-shaped terminal part (13), the initiating terminal of described line part (11) links to each other with earth point (3) with described distributing point (2), and the position between the two forms an open slot (111); Described line part (11) and circuitous kink (12) all are formed with a plurality of enclosed slots (14).
2, improved planar reversing-F shaped built-in antenna of cell phone according to claim 1, it is characterized in that: described line part (11) is the straightway that broadens, it is wide (112) with the The initial segment that described distributing point (2) links to each other with earth point (3), and the terminal part that links to each other with described circuitous kink (12) is narrow (113).
3, improved planar reversing-F shaped built-in antenna of cell phone according to claim 2, it is characterized in that: described line part (11) is formed with three enclosed slots (14), comprises by described wide (112) extending to first enclosed slot (141) of narrow (113), second enclosed slot (142) of described first enclosed slot of next-door neighbour (141) and the 3rd enclosed slot (143) of described second enclosed slot of next-door neighbour (142).
4, improved planar reversing-F shaped built-in antenna of cell phone according to claim 3, it is characterized in that: described first enclosed slot (141) is a bending, described second enclosed slot (142) and the 3rd enclosed slot (143) are all linearity, and the length of described the 3rd enclosed slot (143) is less than half of described second enclosed slot (142) length.
5, according to claim 3 or 4 described improved planar reversing-F shaped built-in antenna of cell phone, it is characterized in that: described first enclosed slot (141) is the bending structure of similar zigzag, the terminal of its anterior described open slot of next-door neighbour (111), and be located on the same line with it; Rear portion and described second enclosed slot (142) and the 3rd enclosed slot (143) are located on the same line; The pars intermedia that connects described front and rear is simultaneously perpendicular to described front and rear.
6, according to claim 3 or 4 described improved planar reversing-F shaped built-in antenna of cell phone, it is characterized in that: described first enclosed slot (141), second enclosed slot (142) and the 3rd enclosed slot (143) all have identical width with described open slot (111), and the abutting end of each groove has identical spacing, and this distance is less than 2mm.
7, improved planar reversing-F shaped built-in antenna of cell phone according to claim 1, it is characterized in that: described circuitous kink (12) comprises a plurality of straightways (121) and the end (122) that is connected each described straightway (121) that are parallel to each other and link to each other successively, and each straightway (121) is perpendicular to described line part (11) and be parallel to described back-shaped terminal part (13).
8, improved planar reversing-F shaped built-in antenna of cell phone according to claim 7, it is characterized in that: described circuitous kink (12) has two described enclosed slots (14), comprises the 5th enclosed slot (145) that forms in the 4th enclosed slot (144) on the described straightway (121) and form in another described straightway (121).
9, improved planar reversing-F shaped built-in antenna of cell phone according to claim 8, it is characterized in that: the length of described the 4th enclosed slot (144) is greater than 15mm, the length of described the 5th enclosed slot (145) is less than 7mm, and this two enclosed slot all extends along the longitudinal direction of described straightway (121).
10, according to claim 7 or 8 described improved planar reversing-F shaped built-in antenna of cell phone, it is characterized in that: described circuitous kink (12) also has a conductor branch (123) is arranged, described conductor branch (123) is positioned between the adjacent two described straightways (121), and parallel with each described straightway (121), its end is mutually concordant with the end of described each straightway (121).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100669834A CN100440617C (en) | 2006-04-04 | 2006-04-04 | Improved planar reversing-F shaped built-in antenna of cell phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100669834A CN100440617C (en) | 2006-04-04 | 2006-04-04 | Improved planar reversing-F shaped built-in antenna of cell phone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1819337A true CN1819337A (en) | 2006-08-16 |
| CN100440617C CN100440617C (en) | 2008-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100669834A Expired - Fee Related CN100440617C (en) | 2006-04-04 | 2006-04-04 | Improved planar reversing-F shaped built-in antenna of cell phone |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7385556B2 (en) | 2006-11-03 | 2008-06-10 | Hon Hai Precision Industry Co., Ltd. | Planar antenna |
| CN101610310B (en) * | 2009-07-07 | 2013-05-15 | 惠州Tcl移动通信有限公司 | Mobile communication terminal |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI506852B (en) * | 2010-04-28 | 2015-11-01 | Hon Hai Prec Ind Co Ltd | Pcb antenna |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4461597B2 (en) * | 2000-09-19 | 2010-05-12 | ソニー株式会社 | Wireless card module |
| US6573869B2 (en) * | 2001-03-21 | 2003-06-03 | Amphenol - T&M Antennas | Multiband PIFA antenna for portable devices |
| JP2003008331A (en) * | 2001-06-20 | 2003-01-10 | Nippon Soken Inc | Antenna |
| CN2613066Y (en) * | 2003-01-21 | 2004-04-21 | 亚太讯息网络有限公司 | Flat antenna |
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2006
- 2006-04-04 CN CNB2006100669834A patent/CN100440617C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7385556B2 (en) | 2006-11-03 | 2008-06-10 | Hon Hai Precision Industry Co., Ltd. | Planar antenna |
| CN101610310B (en) * | 2009-07-07 | 2013-05-15 | 惠州Tcl移动通信有限公司 | Mobile communication terminal |
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| Publication number | Publication date |
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| CN100440617C (en) | 2008-12-03 |
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