CN100576631C - Inverted F shaped antenna - Google Patents
Inverted F shaped antenna Download PDFInfo
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- CN100576631C CN100576631C CN200510024271A CN200510024271A CN100576631C CN 100576631 C CN100576631 C CN 100576631C CN 200510024271 A CN200510024271 A CN 200510024271A CN 200510024271 A CN200510024271 A CN 200510024271A CN 100576631 C CN100576631 C CN 100576631C
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Abstract
The present invention relates to a kind of design of inverted F shaped antenna, comprising: a microwave base plate, a medium substrate, a radiation sheet metal, a short-circuiting jumper and a feed-in sheet metal.Radiation sheet metal also comprises connection sheet metal, the first sub-radiation sheet metal, the second sub-radiation sheet metal, the 3rd sub-radiation sheet metal, coupling sheet metal, slit, short dot and load point; The first sub-radiation sheet metal is in order to produce first (low frequency) the operation mode of antenna, the second sub-radiation sheet metal is in order to produce second (high frequency) the operation mode of antenna, and the 3rd sub-radiation sheet metal is then operated the frequency of operation and the operation frequency range of mode in order to adjust second of antenna; Slit and load point and short dot are in order to adjust impedance matching; Ground plane has a barbed portion, operates the operation frequency range of mode in order to first (low frequency) that increases antenna; The present invention is applicable to the GSM of Mobile Communications system (880 ~ 960MHz) and DCS (the frequency range demand of 1710 ~ 1880MHz) frequency bands.
Description
Technical field
The present invention system relates to a kind of inverted F shaped antenna (inverted-F antenna), particularly is applied to the antenna on the radio communication product.
Background technology
Along with the fast development of wireless telecommunications in recent years, on the performance requirement of antenna, also improve gradually, except the downsizing that requires size, on antenna performance, also must possess characteristics such as multiband or big frequency range are arranged, just can accord with the demands of the market.And under the consideration of outward appearance and practical convenience; also gradually towards built-in Antenna Design; simultaneously owing to need be built in the communication product casing; antenna is also relative important with the fit system of system ground; the different ground plane forms and the relative position of ground plane and antenna can make the design of built-in antenna have great otherness usually.Therefore how in limited environment and space, utilize effective ground plane mode to cooperate best antenna parameter,, become the important indicator of built-in antenna design to reach the required specification of product.
Be applied to the mobile communication apparatus at present as mobile phone, the built-in antenna of products such as PDA(Personal Digital Assistant), usually adopt reversed F-typed Antenna Design, and below antenna, has complete ground plane, known inverted F shaped antenna design is as United States Patent (USP) the 6th, 727,854 B2 numbers " reversed F-typed plate aerial " (with reference to figure 1), it discloses a kind of built-in antenna of the mobile phone that is applied to take action, the main radiation sheet metal part of its antenna, set out by load point 15 and short dot 16 and can roughly be divided into three current paths 10,13,14, utilize this difference path to inspire different resonance frequencys, the synthetic dual frequency operation that meets the GSM/DCS bandwidth requirements; This type of inverted F shaped antenna design has a complete ground plane usually below antenna, therefore cause its operation frequency range less, the difficult required frequency range demand of band system band of reaching, and in order to form the wideband effect, need to adopt the mode of a plurality of sinuous current paths, make antenna structure comparatively complicated, and antenna characteristics adjustment difficulty is higher in practical application.For solving this problem, a kind of innovative design of inverted F shaped antenna is proposed in the present invention, utilize a ground plane with barbed portion, and its breach is positioned at the radiation sheet metal below of this antenna, can effectively increase the frequency range and the efficient of antenna.And the first sub-radiation sheet metal of this radiation sheet metal is positioned on the medium substrate side near microwave base plate edge, is away from the position of ground plane, also can make the operation frequency range increase.Therefore antenna of the present invention can reach the band system band demand of wideband under the situation that does not increase the antenna overall complexity, is the innovative design that has the industry using value.
Summary of the invention
As mentioned above, the object of the present invention is to provide a kind of innovative design of inverted F shaped antenna, can effectively increase antenna bandwidth and efficient to reach the frequency range demand of band system band.
Inverted F shaped antenna of the present invention comprises: a microwave base plate, this microwave base plate have a first surface and a second surface; One medium substrate, be positioned at the first surface top of this microwave base plate, this medium substrate has a upper surface, one first side and one second side, wherein this first side is near a minor face edge of this microwave base plate and be roughly parallel to this edge, this second side then is and this mutually perpendicular side, first side, and the length of this first side is greater than this second side; One radiation sheet metal, this radiation sheet metal comprises one and connects sheet metal, one first sub-radiation sheet metal, one second sub-radiation sheet metal, one the 3rd sub-radiation sheet metal, a coupling sheet metal, a slit, a short dot and a load point, and wherein this connection sheet metal is positioned at this upper surface of this medium substrate near this place, second side; This first sub-radiation sheet metal is positioned on this first side of this medium substrate, the one end is connected sheet metal with this and is connected, the other end is then to extending away from this second side surface direction, this first sub-radiation sheet metal forms long current path, in order to produce first (low frequency) the operation mode of this antenna, adjust the length and the width of this first sub-radiation sheet metal, the centre frequency of fine-tuning this first (low frequency) operation mode, this second sub-radiation sheet metal then is positioned at this upper surface of this medium substrate and an end and is connected sheet metal with this and is connected, it forms short current path, in order to produce second (high frequency) the operation mode of this antenna, the same centre frequency of adjusting also fine-tuning this second (high frequency) operation of its length mode, the 3rd sub-radiation sheet metal is positioned at surface on this medium substrate, the one end is connected with this first sub-radiation sheet metal, the other end is then near this second sub-radiation sheet metal, utilize the capacity effect that is produced between the two, can adjust the frequency of operation and the operation frequency range of this second operation mode of this antenna, change the length and the width of the 3rd sub-radiation sheet metal, fine-tuning its electric capacity capacitor value, this coupling sheet metal is positioned at this upper surface of this medium substrate, and being connected sheet metal with this is connected, this slit and this short dot and this load point then are positioned on this coupling sheet metal, wherein the openend of this slit is on an edge of this coupling sheet metal and between this short dot and this load point, the other end then extends to the inside of this coupling sheet metal, the length of this slit can effectively change path between this short dot and this load point, therefore can be in order to adjust the impedance matching of this antenna mode, suitably the length of distance and this slit between this short dot of variation and this load point can make antenna reach good impedance matching; One ground plane, this ground plane are positioned at the first surface of this microwave base plate and have a barbed portion, and this barbed portion is near this minor face edge of this microwave base plate and be positioned at this first sub-radiation sheet metal below; One short-circuiting jumper, the one end is connected to this ground plane, and the other end then is connected with this short dot of this radiation sheet metal; One feed-in sheet metal, the one end is connected with this load point of this radiation sheet metal, and the other end then is connected to system signal source, in order to transmission signal.
In this design, this first sub-radiation sheet metal is positioned on this first side of this medium substrate, system of distance ground plane position farthest just, therefore can make minimum capacitive character is arranged between radiation sheet metal and the system ground, energy can have radiation effect preferably, and system ground adopts the mode of a breach, can reduce the capacitive character between radiation sheet metal and ground plane equally, antenna bandwidth and efficient all can significantly promote, therefore can obtain the comparatively Antenna Design of wideband, via the barbed portion of suitable adjustment ground plane, can obtain the dual-band antenna of compliance with system frequency range demand.
Description of drawings
Fig. 1 is known inverted F shaped antenna one example structure figure.
Fig. 2 is inverted F shaped antenna one example structure figure of the present invention.
Fig. 3 returns the loss experimental result for inverted F shaped antenna one embodiment's of the present invention.
Fig. 4 is another example structure figure of inverted F shaped antenna of the present invention.
Embodiment
Be illustrated in figure 2 as one of inverted F shaped antenna of the present invention embodiment 2, it comprises: a microwave base plate 20, this microwave base plate 20 have a first surface 201 and a second surface 202; One medium substrate 23 is positioned at first surface 201 tops of this microwave base plate 20, and this medium substrate 23 has a upper surface 231,2 first sides 232 and 2 second sides 233, and this medium substrate 23 is air or dielectric constant near 1 plastic material; Wherein, in first side 232 of outer end near a minor face edge 203 of these microwave base plates 20 and be roughly parallel to this edge 203, this second side 233 then is and these 232 mutually perpendicular sides, first side, and the length of this first side 232 is greater than this second side 233; One radiation sheet metal 24, this radiation sheet metal 24 comprises one and connects sheet metal 241, one first sub-radiation sheet metal 242, one second sub-radiation sheet metal 243, one the 3rd sub-radiation sheet metal 244, one coupling sheet metal 245, one slit 246, one short dot 247 and a load point 248, wherein this connection sheet metal 241 is positioned at this upper surface 231 of this medium substrate 23 near these 233 places, second side, and this first sub-radiation sheet metal 242 is positioned on this first side of this medium substrate 23 232, the one end is connected sheet metal 241 and is connected with this, the other end then extends to long-range second side, 233 directions, this first sub-radiation sheet metal 242 forms long current path, in order to produce first (low frequency) the operation mode of this antenna, adjust the length and the width of this first sub-radiation sheet metal 242, be the centre frequency of fine-tuning this first (low frequency) operation mode, to reach the required bandwidth requirements of system; This second 243 of sub-radiation sheet metal is positioned at this upper surface 231 of this medium substrate 23 and an end and is connected sheet metal 241 with this and is connected, it forms short current path, in order to produce second (high frequency) the operation mode of this antenna, adjust the centre frequency of also fine-tuning this second (high frequency) operation of its length mode equally; The 3rd sub-radiation sheet metal 244 is positioned at the upper surface 231 of this medium substrate 23, the one end is connected with this first sub-radiation sheet metal 242, the other end is then near this second sub-radiation sheet metal 243, utilize the capacity effect that is produced between the two, can adjust the frequency of operation and the operation frequency range of the second operation mode of this antenna, change the length and the width of the 3rd sub-radiation sheet metal 244, it is fine-tuning its electric capacity capacitor value, and this coupling sheet metal 245 is positioned at this upper surface 231 of this medium substrate 23, and be connected sheet metal 241 is connected with this, and this slit 246,248 of this short dot 247 and this load points are positioned on this coupling sheet metal 245, wherein the openend of this slit 246 is positioned on the edge of this coupling sheet metal 245, and between this short dot 247 and this load point 248, the other end then extends within this coupling sheet metal 245, the length of this slit 246 can effectively change the path of 248 of this short dot 247 and this load points, therefore can be in order to adjust the impedance matching of this antenna mode, suitably change this short dot 247 and the spacing of this load point 248 and the length of this slit 246, can make antenna reach good impedance matching; One ground plane 25, this ground plane 25 is positioned at the first surface 201 of this microwave base plate 20 and has a barbed portion 251, this barbed portion 251 is near the minor face edge 203 of these microwave base plates 20 and be positioned at this first sub-radiation sheet metal, 242 belows, this barbed portion can make this first radiation sheet metal 242 more away from this system ground 25, makes the operation frequency range of first (low frequency) operation mode of this antenna significantly increase; One short-circuiting jumper 26, one end are connected to this ground plane 25, and the other end then is connected with this short dot 247 of this radiation sheet metal 24; One feed-in sheet metal 27, the one end is connected with this load point 248 of this radiation sheet metal 24, and the other end then is connected to system signal source, in order to transmission signal.
Fig. 3 returns the loss experimental result for one of antenna of the present invention embodiment's 2; Curve 31 is first (low frequency) the operation mode of this antenna among the figure, 32 of curves are second (high frequency) the operation mode of this antenna, the impedance frequency range that can be obtained this two operations mode of this embodiment by experimental result descends in 2.5: 1 VSWR (voltage standing wave ratio) definition, 110MHz and 170MHz can be reached, mobile phone GSM (880 ~ 960MHz) and the DCS (bandwidth requirements of 1710 ~ 1880MHz) systems can be satisfied.
Be illustrated in figure 4 as an embodiment 4 of inverted F shaped antenna of the present invention, it comprises: a microwave base plate 40, this microwave base plate have a first surface 401 and a second surface 402; One medium substrate 43 is positioned at first surface 401 tops of this microwave base plate 40, and this medium substrate 43 has a upper surface 431,2 first sides 432 and 2 second sides 433, and this medium substrate 43 is air or dielectric constant near 1 plastic material; Wherein, in first side 432 of outer end near a minor face edge 403 of these microwave base plates 40 and be roughly parallel to this edge 403, this second side 433 then is and these 432 mutually perpendicular sides, first side, and the length of this first side 432 is greater than this second side 433; One radiation sheet metal 44, this radiation sheet metal 44 comprises one and connects sheet metal 441, one first sub-radiation sheet metal 442, one second sub-radiation sheet metal 443, one the 3rd sub-radiation sheet metal 444, one coupling sheet metal 445, one slit 446, one short dot 447 and a load point 448, wherein this connection sheet metal 441 is positioned at the upper surface 431 of this medium substrate 43 near these 433 places, second side, and this first sub-radiation sheet metal 442 is positioned on this first side of this medium substrate 43 432, the one end is connected sheet metal 441 and is connected with this, the other end then extends towards long-range second side, 433 directions in the mode of wriggling, this first sub-radiation sheet metal 442 forms long current path, in order to produce first (low frequency) the operation mode of this antenna, adjust the sinuous total length and the serpentine path width of this first sub-radiation sheet metal 442, the centre frequency of fine-tuning this first (low frequency) operation mode, to reach the required bandwidth requirements of system, this second 443 of sub-radiation sheet metal is positioned at this upper surface 431 of this medium substrate 43 and an end and is connected sheet metal 441 with this and is connected, it forms short current path, in order to produce second (high frequency) the operation mode of this antenna, the same centre frequency of adjusting also fine-tuning this second (high frequency) operation of its length mode, the 3rd sub-radiation sheet metal 444 is positioned at the upper surface 431 of this medium substrate 43, the one end is connected with this first sub-radiation sheet metal 442, the other end is then near this second sub-radiation sheet metal 443, utilize the capacity effect that is produced between the two, can adjust the frequency of operation and the operation frequency range of this second operation mode of this antenna, change the length and the width of the 3rd sub-radiation sheet metal 444, fine-tuning its electric capacity capacitor value, and this coupling sheet metal 445 is positioned at this upper surface 431 of this medium substrate 43, and be connected sheet metal 441 is connected with this, and this slit 446,448 of this short dot 447 and this load points are positioned on this coupling sheet metal 445, wherein the openend of this slit 446 is on an edge of this coupling sheet metal 445 and between this short dot 447 and this load point 448, the other end then extends to the inside of this coupling sheet metal 445, the length of this slit 446 can effectively change the path of 448 of this short dot 447 and this load points, therefore can be in order to adjust the impedance matching of this antenna mode, suitably the length of distance and this slit 446 between this short dot 447 of variation and this load point 448 can make antenna reach good impedance matching; One ground plane 45, this ground plane 45 is positioned at the first surface 401 of this microwave base plate 40 and has a barbed portion 451, this barbed portion 451 is near this minor face edges 403 of this microwave base plates 40 and be positioned at this first sub-radiation sheet metal, 442 belows, this barbed portion can make this first radiation sheet metal 442 more away from this system ground 45, makes the operation frequency range of this first (low frequency) operation mode of this antenna significantly increase; One short-circuiting jumper 46, one end are connected to this ground plane 45, and the other end then is connected with this short dot 447 of this radiation sheet metal 44; One feed-in sheet metal 47, the one end is connected with this load point 448 of this radiation sheet metal 44, and the other end then is connected to system signal source, in order to transmission signal.
Only be explanation principle of the present invention and effect thereof at the embodiment described in the present invention's explanation, and unrestricted the present invention.Therefore, person skilled in the art scholar can make amendment to the foregoing description without prejudice to spirit of the present invention and change.Interest field of the present invention claim as described later is listed.
Claims (4)
1. an inverted-F antenna includes a microwave base plate, a medium substrate, a radiation sheet metal, a ground plane, a short-circuiting jumper, a feed-in sheet metal, it is characterized in that:
Described microwave base plate has a first surface and a second surface;
Described medium substrate is positioned at the first surface top of described microwave base plate, described medium substrate has a upper surface, 2 first sides and 2 second sides, wherein, in first side of outer end near a minor face edge of described microwave base plate and be parallel to described edge, described second side then is and mutually perpendicular side, described first side, and the length of described first side is greater than described second side;
Described radiation sheet metal comprises that also one connects sheet metal, one first sub-radiation sheet metal, one second sub-radiation sheet metal, one the 3rd sub-radiation sheet metal, one coupling sheet metal, one slit, one short dot and a load point, wherein, the described upper surface that described connection sheet metal is positioned at described medium substrate near with long-range second side surface opposite place, second side, and the described first sub-radiation sheet metal be positioned at described medium substrate on first side of outer end, the one end is connected with the described sheet metal that is connected, the other end then extends to the second long-range side surface direction, the described first sub-radiation sheet metal forms long current path, in order to produce first (low frequency) the operation mode of described antenna, a described upper surface and an end that the described second sub-radiation sheet metal then is positioned at described medium substrate are connected with the described sheet metal that is connected, it forms short current path, in order to produce second (high frequency) the operation mode of described antenna, the described the 3rd sub-radiation sheet metal is positioned at the upper surface of described medium substrate, the one end is connected with the described first sub-radiation sheet metal, the other end is then near the described second sub-radiation sheet metal, the capacity effect of its generation is operated the frequency of operation and the operation frequency range of mode in order to adjust described second of described antenna, and described coupling sheet metal is positioned at the described upper surface of described medium substrate, and be connected with the described sheet metal that is connected, and described slit, described short dot and described load point then are positioned on the described coupling sheet metal, the openend of wherein said slit is on the edge of described coupling sheet metal and between described short dot and described load point, and the other end then extends to the inside of described coupling sheet metal;
Described ground plane is positioned at the first surface of described microwave base plate and has a barbed portion, the minor face edge of the close described microwave base plate of described barbed portion also is positioned at the described first sub-radiation sheet metal below, operates the operation frequency range of mode in order to first (low frequency) that increases described antenna;
One end of described short-circuiting jumper is connected to described ground plane, and the other end then is connected with the described short dot of described radiation sheet metal;
One end of described feed-in sheet metal is connected with the described load point of described radiation sheet metal, and the other end then is connected to system signal source, in order to transmission signal.
2. inverted F shaped antenna as claimed in claim 1 is characterized in that, the described first sub-radiation sheet metal is a straight-line extension.
3. inverted F shaped antenna as claimed in claim 1 is characterized in that, the described first sub-radiation sheet metal extends for the formula of wriggling.
4. inverted F shaped antenna as claimed in claim 1 is characterized in that, described medium substrate is air or dielectric constant near 1 plastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510024271A CN100576631C (en) | 2005-03-09 | 2005-03-09 | Inverted F shaped antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510024271A CN100576631C (en) | 2005-03-09 | 2005-03-09 | Inverted F shaped antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1832256A CN1832256A (en) | 2006-09-13 |
| CN100576631C true CN100576631C (en) | 2009-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510024271A Expired - Fee Related CN100576631C (en) | 2005-03-09 | 2005-03-09 | Inverted F shaped antenna |
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| CN (1) | CN100576631C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170218B (en) * | 2006-10-26 | 2012-05-09 | 连展科技电子（昆山）有限公司 | Coupling multi-frequency antenna |
| KR100856310B1 (en) * | 2007-02-28 | 2008-09-03 | 삼성전기주식회사 | Mobile-communication terminal |
| CN105990672A (en) * | 2015-02-06 | 2016-10-05 | 智易科技股份有限公司 | Double-frequency dipole antenna |
| TWI594501B (en) | 2015-12-15 | 2017-08-01 | 華碩電腦股份有限公司 | Antenna and electric device using the same |
| CN106058473B (en) * | 2016-07-30 | 2018-12-04 | 北京海杭通讯科技有限公司 | A kind of antenna increasing bandwidth |
| CN111342214B (en) * | 2020-03-06 | 2023-03-21 | 南通智通达微电子物联网有限公司 | Metal radiating element and PIFA antenna with multiple operating frequencies |
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2005
- 2005-03-09 CN CN200510024271A patent/CN100576631C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1832256A (en) | 2006-09-13 |
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