CN101442152B - Antenna device - Google Patents

Antenna device Download PDF

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Publication number
CN101442152B
CN101442152B CN 200710193421 CN200710193421A CN101442152B CN 101442152 B CN101442152 B CN 101442152B CN 200710193421 CN200710193421 CN 200710193421 CN 200710193421 A CN200710193421 A CN 200710193421A CN 101442152 B CN101442152 B CN 101442152B
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CN
China
Prior art keywords
antenna
circuit board
point
radiation
antenna assembly
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Active
Application number
CN 200710193421
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Chinese (zh)
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CN101442152A (en
Inventor
陈敏哲
陈国丞
王静松
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HTC Corp
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High Tech Computer Corp
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Priority to CN 200710193421 priority Critical patent/CN101442152B/en
Publication of CN101442152A publication Critical patent/CN101442152A/en
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Publication of CN101442152B publication Critical patent/CN101442152B/en
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Abstract

The invention relates to an antenna device, which comprises a circuit board, an antenna and a conducting wire, 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 which is extended outwards from the radiation part, wherein the feed-in part is electrically connected with the signal feed-in point; and the wire is arranged on the circuit board and electrically connected with the ground plane and the signal feed-in point, for example, the conducting wire is a printed circuit which is formed on the circuit board. The antenna device does not need to be provided with a grounding part of the antenna, so as to be capable of effectively reducing the hardware space of an electronic device.

Description

Antenna assembly
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
Present society masses' communication modes, 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 is because processing procedure is complicated than other metal antennas, so price and cost are higher.Its needed area of plate aerial or planar inverted-F antenna is larger, and it accounts for effective radiation areas at circuit board, the space that significantly reduces circuit board uses, one suitable distance is wherein arranged between the metal radiation body of planar inverted-F antenna and the circuit board, energy is mutually resonance between antenna and circuit board, and with the linearly polarized wave emittance.The plate aerial framework is main mainly with ceramic antenna, include a signal feed-in point, and take ground plane as 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 large, 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 namely 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 by an end of radiant body 31 to downward-extension, usually be electrically connected by the ground plane 42 on grounding elastic part (not shown) and the circuit board 4, feeding portion 32 then is electrically connected with signal feed-in point 41 to downward-extension by the position of radiant body 31 rough centres, 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 better 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 wire, 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 are electrically connected, and this wire is arranged on this circuit board and is electrically connected this ground plane and this signal feed-in point.
In antenna assembly of the present invention, this wire is the printed wire (printedtrace) that forms at this circuit board, and the length of this wire 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 consists of 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 surface adhering technical that this antenna is installed on this circuit board.
In addition, antenna assembly of the present invention also can be applicable to wireless local area network (WiFi) antenna or bluetooth (Bluetooth) communication antenna except 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, do not come ground connection so that antenna must not arrange extra grounding parts, so can reach equally the effect of the ground connection of conventional planar inverse-F antenna.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 and 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 be from this Department of Radiation 111 to downward-extension, and be electrically connected with the signal feed-in point 121 of position on this printed circuit board (PCB) 12.
In the present embodiment, one wire 123 is set on this printed circuit board (PCB) 12, this wire 123 for example is the printed circuit (printed trace) that directly forms at this printed circuit board (PCB) 12, and stretch out and be electrically connected 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 short circuit grounding point (short pad).
For reaching the better 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 wire 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 wire 123, because if the length d 2 of wire 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 wire 123 is greater than 5mm, the loss (loss) of the signal energy on this antenna 1 will be caused, and the volume of required antenna will increase, and then affect the usefulness of this antenna assembly 1.
The antenna assembly 1 of the 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 technical (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 simultaneously embedded technology (Insert-molding), on the antenna pedestal (not shown) of these antenna 11 embeddings take plastic cement as material, and be 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 Novel state 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 the present embodiment for example is 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 above-described embodiment 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 above-described embodiment 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 be from this Department of Radiation 111 to downward-extension, and be electrically connected with the signal feed-in point 121 of position on this printed circuit board (PCB) 12.
One wire 123 is set on this printed circuit board (PCB) 12, this wire 123 for example is the printed circuit (printed trace) that directly forms at this printed circuit board (PCB) 12, and stretch out and be electrically connected 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 grounding face (short pad).
The present embodiment place different from above-described embodiment is to be, Department of Radiation 111 formed planes of the antenna 11 of the 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 a wireless local area network (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, do not come ground connection so that antenna must not arrange extra grounding parts, so can reach equally the effect of the ground connection of conventional planar inverse-F antenna.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 and volume miniaturization.
The present invention utilizes surface adhering technical that this antenna body is installed on the circuit board in addition, utilize simultaneously embedded technology, on the antenna pedestal of antenna body embedding take plastic cement as material, and be fixed on the circuit board with the end of hot pressing technology with antenna pedestal again, be different from traditional gps antenna with the way of contact of thimble (pogo-pin) or shell fragment and signal feed-in point or ground short circuit point, not only more firm fixing of element, and better impedance Control is arranged.
Although the present invention discloses as above with preferred embodiment; so it is not to limit 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)

1. antenna assembly comprises:
One circuit board comprises a ground plane and a signal feed-in point, and this ground plane and this signal feed-in point are arranged on this circuit board;
One antenna comprises a Department of Radiation and a feeding portion from this Department of Radiation extension, and this feeding portion is electrically connected this signal feed-in point; And
One wire is extended out to this ground plane of this circuit board, to be electrically connected this ground plane and this signal feed-in point by this signal feed-in point.
2. antenna assembly as claimed in claim 1 is characterized in that, this wire comprises that one is arranged on the printed wire on this circuit base.
3. antenna assembly as claimed in claim 2 is characterized in that, the length of this wire is between between the 2mm to 5mm, and its width is between between the 0.25mm to 0.5mm.
4. antenna assembly as claimed in claim 1 is characterized in that, the distance of this Department of Radiation and this ground plane is at least 2mm.
5. antenna assembly as claimed in claim 1 is characterized in that, this Department of Radiation has a plane.
6. antenna assembly as claimed in claim 5 is characterized in that, the plane of this Department of Radiation and this circuit board approximate vertical.
7. antenna assembly as claimed in claim 5 is characterized in that, the plane of this Department of Radiation and this circuit board almost parallel.
8. antenna assembly as claimed in claim 1 is characterized in that, this antenna is to be installed on this circuit board with surface adhering technical.
9. antenna assembly as claimed in claim 1 is characterized in that, also comprises an antenna pedestal, it is characterized in that, this antenna is fixed on this antenna pedestal.
10. antenna assembly as claimed in claim 9 is characterized in that, the material of this antenna pedestal is plastic cement, and this antenna is to be fixed on this antenna pedestal with embedded technology.
CN 200710193421 2007-11-22 2007-11-22 Antenna device Active CN101442152B (en)

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 CN101442152A (en) 2009-05-27
CN101442152B true CN101442152B (en) 2013-05-01

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6861986B2 (en) * 2002-10-08 2005-03-01 Wistron Neweb Corporation Multifrequency inverted-F antenna
CN1877910A (en) * 2005-06-10 2006-12-13 鸿富锦精密工业(深圳)有限公司 Dual-frequency antenna
CN1926720A (en) * 2003-12-25 2007-03-07 三菱综合材料株式会社 Antenna device and communication apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6861986B2 (en) * 2002-10-08 2005-03-01 Wistron Neweb Corporation Multifrequency inverted-F antenna
CN1926720A (en) * 2003-12-25 2007-03-07 三菱综合材料株式会社 Antenna device and communication apparatus
CN1877910A (en) * 2005-06-10 2006-12-13 鸿富锦精密工业(深圳)有限公司 Dual-frequency antenna

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