CN101442152A - Antenna device - Google Patents
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- CN101442152A CN101442152A CNA2007101934210A CN200710193421A CN101442152A CN 101442152 A CN101442152 A CN 101442152A CN A2007101934210 A CNA2007101934210 A CN A2007101934210A CN 200710193421 A CN200710193421 A CN 200710193421A CN 101442152 A CN101442152 A CN 101442152A
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Abstract
The invention relates to an antenna device, comprising a circuit board, an antenna and a lead, wherein the circuit board comprises a ground plane and a signal feed-in point, the antenna comprises a radiation part and a feed-in part extending outwards from the radiation part, the feed-in part is electrically connected with the signal feed-in point, the lead is arranged on the circuit board and electrically connected with the ground plane and the signal feed-in point, and the lead is, for example, a printed circuit formed on the circuit board. The antenna device of the invention does not need to be provided with a grounding part of the antenna, and can effectively reduce the hardware space of the electronic device.
Description
Technical field
The invention relates to a kind of antenna assembly, particularly relevant for a kind of planar inverted-F antenna (PIFA) device that is applied to global positioning system (GPS).
Background technology
The communication modes of present society, the epoch of wireless telecommunications have slowly been changed into, and wireless communication apparatus also more and more is tending towards variation, smart mobile phone for example, multimedia player, the satellite navigator of personal digital aid (PDA) and applied global positioning system (GPS, global positioning system) etc.Every electronic installation with wireless transmission function also all goes to improve towards compact design concept, is more suitable for the employed electronic product of daily life to reach.
The traditional global positioning system antenna that is applied in the wireless device is in the majority with ceramic antenna (chip antenna), plate aerial (patch antenna) or planar inverted-F antenna (planar inverted F antenna), wherein ceramic antenna since processing procedure than other metal antenna complexity, so price and cost are higher.Its needed area of plate aerial or planar inverted-F antenna is bigger, and it accounts for effective radiation areas on circuit board, significantly reduce the space utilization of circuit board, one suitable distance is wherein arranged between the metal radiant body of planar inverted-F antenna and the circuit board, energy is resonance mutually between antenna and circuit board, and with the linearly polarized wave emittance.The plate aerial framework is many based on ceramic antenna, include a signal feed-in point, and with ground plane for its energy resonance face with the Circular Polarisation wave radiation, this kind antenna has high directivity, but its shortcoming is that required antenna area is big, price is high, and the behavior pattern that is not suitable for mobile phone is used.In addition, it is in the majority that above-mentioned traditional global positioning system antenna and the way of contact of signal feed-in point or ground short circuit point (short pad) contact with thimble (pogo-pin) or shell fragment, therefore is not easy in impedance (resistance) control.
Fig. 1 promptly illustrates a kind of structure of existing planar inverted-F antenna, wherein planar inverted-F antenna 3 comprises the radiant body 31 on a plane, one feeding portion 32 and a grounding parts 33, wherein radiant body 31 is arranged on circuit board 4 tops, grounding parts 33 is extended downwards by an end of radiant body 31, usually electrically connect by the ground plane 42 on grounding elastic part (figure does not show) and the circuit board 4, feeding portion 32 is then extended downwards by radiant body 31 rough position intermediate and electrically connects with signal feed-in point 41, therefore in traditional planar inverted-F antenna 3, the signal feed-in point 41 of circuit board 4 is not to be connected mutually with ground plane 42.
In above-mentioned existing technology, the wider space of antenna 3 grounding parts 33 must be provided on the circuit board 4, just can reach preferable antenna performance.Yet along with the hand-hold electronic device function significantly promotes and volume more under the demand of miniaturization, difficult have unnecessary space to offer the downward ground connection of planar inverted-F antenna, but for global positioning system antenna, if planar inverted-F antenna is earth-free, then the size of radiant body multiplication is also difficult reaches required frequency, not only increase cost, also do not meet the demand of hand-hold electronic device volume miniaturization.
Summary of the invention
For addressing the above problem, the invention provides a kind of antenna assembly, comprise a circuit board, an antenna and a lead, wherein this circuit board comprises a ground plane and a signal feed-in point, this antenna comprises that a Department of Radiation and is from the outward extending feeding portion of this Department of Radiation, wherein this feeding portion and this signal feed-in point electrically connect, and this lead is arranged on this circuit board and electrically connects this ground plane and this signal feed-in point.
In antenna assembly of the present invention, this lead is the printed wire (printedtrace) that forms on this circuit board, and the length of this lead is preferably between between 2mm to 5mm, and its width is preferably between between 0.25mm to 0.5mm.In addition, the distance of the Department of Radiation of this antenna and this ground plane is at least 2mm.
In the antenna assembly of antenna assembly of the present invention, the Department of Radiation of this antenna constitutes a plane, and this plane is roughly parallel with this circuit board, or with this circuit board approximate vertical.
In the antenna assembly of antenna assembly of the present invention, be to utilize embedded technology, this antenna is fixed on this antenna pedestal, and also utilizes the surface adhering technology that this antenna is installed on this circuit board.
In addition, antenna assembly of the present invention also can be applicable to wireless local networking (WiFi) antenna or bluetooth (Bluetooth) communication antenna except that can be applicable to global positioning system (GPS) antenna.
The present invention utilizes signal feed-in point and the ground plane on printed circuit (printed trace) the electric connection circuit board that forms on the circuit board, make antenna that extra grounding parts must be set and come ground connection, so can reach the effect of the ground connection of conventional planar inverse-F antenna equally.Compare with prior art, antenna assembly of the present invention because the grounded part of antenna must be set, can effectively reduce the hardware space of electronic installation, and reach the demand that reduces cost with the volume miniaturization.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 is the schematic diagram that illustrates a kind of existing planar inverted-F antenna;
Fig. 2 is the schematic diagram that illustrates a preferred embodiment of antenna assembly of the present invention;
Fig. 3 is the antenna assembly that illustrates the above-mentioned preferred embodiment of the present invention, resonates when 1575.42MHz the actual measurement figure of its voltage standing wave ratio; And
Fig. 4 is the schematic diagram that illustrates another preferred embodiment of antenna assembly of the present invention.
Embodiment
Please refer to Fig. 2, one preferred embodiment of antenna assembly 1 of the present invention is one to be applied to the inverse-F antenna of global positioning system (GPS), this antenna assembly 1 comprises an antenna 11, be arranged on the printed circuit board (PCB) 12, wherein a Department of Radiation 111 of this antenna 11 and this printed circuit board (PCB) 12 are at a distance of a suitable distance, and a feeding portion 112 of this antenna 11 is to extend downwards from this Department of Radiation 111, and electrically connects with the signal feed-in point 121 of position on this printed circuit board (PCB) 12.
In the present embodiment, one lead 123 is set on this printed circuit board (PCB) 12, this lead 123 for example is the printed circuit (printed trace) that directly forms on this printed circuit board (PCB) 12, and stretch out and electrically connect with a ground plane 122 on this printed circuit board (PCB) 12 by this signal feed-in point 121, wherein this ground plane 122 for example is a short circuit earth point (short pad).
For reaching the preferable usefulness of this antenna assembly 1, the Department of Radiation 111 of this antenna 11 is at least 2mm with the ground plane of this printed circuit board (PCB) 12 apart from d1.In addition, the length d 2 of the formed lead 123 of above-mentioned printed circuit is preferably between between the 2mm to 5mm, and its width is preferably between between the 0.25mm to 0.5mm.Problem about the length of lead 123, be because if the length d 2 of lead 123 is less than 2mm, then the signal energy on this antenna 1 will directly be imported in this ground plane 122, if the length d 2 of lead 123 is greater than 5mm, the loss (loss) of the signal energy on this antenna 1 will be caused, and required antenna volume will increase, and then influence the usefulness of this antenna assembly 1.
The antenna assembly 1 of present embodiment is the inverse-F antenna of a global positioning system, and wherein the Department of Radiation 111 of this antenna 11 forms a plane, and this plane is roughly vertical with this printed circuit board (PCB) 12.In the present embodiment, for this antenna 11 more preferably is fixed on this printed circuit board (PCB) 12, except utilizing surface adhering technology (SMT, surface mounting technology) feeding portion 112 with this antenna 11 is installed on the signal feed-in point 121 of this circuit board 12, utilize embedded technology (Insert-molding) simultaneously, it is on the antenna pedestal (figure does not show) of material that this antenna 11 is embedded with the plastic cement, and is fixed on this printed circuit board (PCB) 12 with the end of hot pressing technology (heat stacking) with this antenna pedestal again.In addition, in the above-described embodiments, the volume of the Department of Radiation 111 of the antenna 11 of the new kenel of the present invention is 21mm * 3mm * 5mm, be positioned at the left edge of the printed circuit board (PCB) 12 of hand held antenna device 1 (for example being smart mobile phone), the volume of the plate aerial (Patch antenna) that its volume is used much smaller than general global position system GPS (15mm * 15mm * 5mm), in addition, the material of the antenna 11 of the antenna assembly 1 of present embodiment for example is a phosphor bronze, with respect to the existing ceramic antenna that is used for global positioning system, the stability of characteristics of phosphor bronze and with low cost.
Please refer to Fig. 3, on the usefulness and practical operation frequency range of antenna, the operation frequency range of known global positioning system (GPS) is 1575.42 ± 2MHz, and the antenna assembly 1 of the foregoing description resonates when 1575.42MHz, and Fig. 3 is the actual measurement figure that shows its voltage standing wave ratio.As seen from Figure 3, in actual measurement, the centre frequency of antenna assembly 1 also is at 1575.42MHz, and the actual measurement data of visible the foregoing description and the working frequency range of global positioning system (GPS) match.
Please refer to Fig. 4, it illustrates another preferred embodiment of antenna assembly 1 of the present invention.In the present embodiment, antenna assembly 1 also is applied to the inverse-F antenna of global positioning system (GPS), this antenna assembly 1 comprises an antenna 11, be arranged on the printed circuit board (PCB) 12, wherein a Department of Radiation 111 of this antenna 11 and this printed circuit board (PCB) 12 are at a distance of a suitable distance, and a feeding portion 112 of this antenna 11 is to extend downwards from this Department of Radiation 111, and electrically connects with the signal feed-in point 121 of position on this printed circuit board (PCB) 12.
One lead 123 is set on this printed circuit board (PCB) 12, this lead 123 for example is the printed circuit (printed trace) that directly forms on this printed circuit board (PCB) 12, and stretch out and electrically connect with a ground plane 122 on this printed circuit board (PCB) 12 by this signal feed-in point 121, wherein this ground plane 122 for example is a short circuit ground plane (short pad).
The present embodiment place different with the foregoing description is to be, Department of Radiation 111 formed planes of the antenna 11 of present embodiment are roughly parallel with printed circuit board (PCB), and two embodiment are roughly the same on other conditions and the practice, therefore states no longer in addition.
In the above-described embodiments, antenna assembly of the present invention is a global positioning system (GPS) antenna, but antenna assembly of the present invention can be applicable to wireless local networking (WiFi) antenna or a bluetooth (Bluetooth) communication antenna, antenna assembly of the present invention can be PDA mobile phone, smart mobile phone, satellite navigator or personal digital assistant etc., is not limited at this.
The present invention utilizes signal feed-in point and the ground plane on printed circuit (printed trace) the electric connection circuit board that forms on the circuit board, make antenna that extra grounding parts must be set and come ground connection, so can reach the effect of the ground connection of conventional planar inverse-F antenna equally.Compare with prior art, antenna assembly of the present invention because the grounded part of antenna must be set, can effectively reduce the hardware space of electronic installation, and reach the demand that reduces cost with the volume miniaturization.
The present invention utilizes the surface adhering technology that this antenna body is installed on the circuit board in addition, utilize embedded technology simultaneously, it is on the antenna pedestal of material that antenna body is embedded with the plastic cement, and be fixed on the circuit board with the end of hot pressing technology again antenna pedestal, be different from of the way of contact of traditional gps antenna with thimble (pogo-pin) or shell fragment and signal feed-in point or ground short circuit point, not only more firm fixing of element, and preferable impedance Control is arranged.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710193421 CN101442152B (en) | 2007-11-22 | 2007-11-22 | Antenna device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710193421 CN101442152B (en) | 2007-11-22 | 2007-11-22 | Antenna device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101442152A true CN101442152A (en) | 2009-05-27 |
| CN101442152B CN101442152B (en) | 2013-05-01 |
Family
ID=40726474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710193421 Active CN101442152B (en) | 2007-11-22 | 2007-11-22 | Antenna device |
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| Country | Link |
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| CN (1) | CN101442152B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989680A (en) * | 2009-08-06 | 2011-03-23 | 宏碁股份有限公司 | Antenna structure |
| CN102646864A (en) * | 2011-02-18 | 2012-08-22 | 英华达（上海）科技有限公司 | Flexible multiple antenna |
| CN106785406A (en) * | 2017-01-18 | 2017-05-31 | 广州碧德电子科技有限公司 | It is used in the gps antenna of intelligent wearable equipment |
| CN109728409A (en) * | 2017-10-30 | 2019-05-07 | 法雷奥汽车内部控制（深圳）有限公司 | Induction charging antenna structure and its manufacturing method, wireless charging module |
| CN113391137A (en) * | 2020-03-11 | 2021-09-14 | Oppo广东移动通信有限公司 | Antenna detection device, method and equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW563274B (en) * | 2002-10-08 | 2003-11-21 | Wistron Neweb Corp | Dual-band antenna |
| EP1703586A4 (en) * | 2003-12-25 | 2008-01-23 | Mitsubishi Materials Corp | Antenna device and communication apparatus |
| CN100592572C (en) * | 2005-06-10 | 2010-02-24 | 鸿富锦精密工业（深圳）有限公司 | Dual-frequency antenna |
-
2007
- 2007-11-22 CN CN 200710193421 patent/CN101442152B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989680A (en) * | 2009-08-06 | 2011-03-23 | 宏碁股份有限公司 | Antenna structure |
| CN102646864A (en) * | 2011-02-18 | 2012-08-22 | 英华达（上海）科技有限公司 | Flexible multiple antenna |
| CN106785406A (en) * | 2017-01-18 | 2017-05-31 | 广州碧德电子科技有限公司 | It is used in the gps antenna of intelligent wearable equipment |
| CN109728409A (en) * | 2017-10-30 | 2019-05-07 | 法雷奥汽车内部控制（深圳）有限公司 | Induction charging antenna structure and its manufacturing method, wireless charging module |
| CN113391137A (en) * | 2020-03-11 | 2021-09-14 | Oppo广东移动通信有限公司 | Antenna detection device, method and equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101442152B (en) | 2013-05-01 |
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