CN104577309A - Mobile communication device - Google Patents
Mobile communication device Download PDFInfo
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- CN104577309A CN104577309A CN201310516695.4A CN201310516695A CN104577309A CN 104577309 A CN104577309 A CN 104577309A CN 201310516695 A CN201310516695 A CN 201310516695A CN 104577309 A CN104577309 A CN 104577309A
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- transmission line
- mobile communications
- communications device
- electrically connected
- electric capacity
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Abstract
The invention provides a mobile communication device. The mobile communication device comprises a grounding element and a feed-in structure, wherein the grounding element comprises a slotted hole; the feed-in structure crosses over the slotted hole, and comprises a first transmission line, a second transmission line and a resonant circuit; the resonant circuit is connected in series between the first transmission line and the second transmission line; in addition, the resonant circuit receives a feed-in signal through the first transmission line, and is electrically connected with the grounding element through the second transmission line.
Description
Technical field
The invention relates to a kind of mobile communications device, and relate to a kind of mobile communications device with multifrequency slot antenna especially.
Background technology
Along with the fast development of wireless communication technology, mobile communications device miscellaneous is constantly commercially weeded out the old and bring forth the new, and the also more and more diversification of the function of mobile communications device.In addition, in order to highlight mobile communications device unique design sense in appearance, mobile communications devices many on market all can emphasize the thickness of its single unit system.Such as, with the high-order machine of existing smart mobile phone, its integral thickness requires at 8 millimeters (mm) below mostly.The reduction of device thickness under this design specification, sizable challenge will be formed for the Antenna Design in mobile communications device, because significantly can affect the radiation characteristic of antenna and then make the communication performance degradation of mobile communications device.
In order to overcome the problem of antenna space deficiency, existing mobile communications device brings into use the kenel of slot antenna (slot antenna) to carry out designing antenna, and is directly printed on circuit boards by antenna.But prior art often cannot be designed under the condition only having single slotted eye can the slot antenna of multi-band operation.In addition, because existing multifrequency slot antenna comprises multiple slotted eye, and the putting position of circuit element and cabling must avoid the slotted eye of antenna in mobile communications device, therefore prior art also must expend too much board area in response to the setting of multifrequency slot antenna, and then the development of moving-limiting communicator on thin type.
Summary of the invention
The invention provides a kind of mobile communications device, a resonant circuit is set in feed-in structure, and utilize feed-in structure to form a multifrequency slot antenna with the earth element with a slotted eye.By this, the development of mobile communications device on thin type will be contributed to.
Mobile communications device of the present invention, comprises earth element and feed-in structure.Earth element comprises a slotted eye.Feed-in structure across slotted eye, and comprises the first transmission line, the second transmission line and resonant circuit.Wherein, resonant circuit is serially connected between the first transmission line and the second transmission line.In addition, resonant circuit receives a FD feed by the first transmission line, and is electrically connected to earth element by the second transmission line.
Based on above-mentioned, the present invention arranges a slotted eye on earth element, and in feed-in structure, arrange a resonant circuit.By this, the present invention can utilize feed-in structure to form a multifrequency slot antenna with the earth element with a slotted eye, and then contribute to the development of mobile communications device on thin type.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate accompanying drawing to be described in detail below.
Accompanying drawing explanation
Fig. 1 is the structural representation of the mobile communications device according to one embodiment of the invention;
Fig. 2 is the floor map of the mobile communications device according to one embodiment of the invention;
Fig. 3 is the circuit diagram of the resonant circuit according to one embodiment of the invention;
Fig. 4 is the circuit diagram of the resonant circuit according to another embodiment of the present invention;
Fig. 5 and Fig. 6 is return loss plot and the antenna efficiency figure of the multifrequency slot antenna of foundation one embodiment of the invention.
Description of reference numerals:
100: mobile communications device;
110: earth element;
120: feed-in structure;
130: substrate;
121: the first transmission lines;
122: the second transmission lines;
123: resonant circuit;
101: slotted eye;
SD11, SD12: the sidewall of slotted eye;
FP: load point;
GP: earth point;
310,410: the first resonating member;
320,420: the second resonating member;
C31, C32, C4: electric capacity;
L3, L4: inductance;
510: the first frequency ranges;
520: the second frequency ranges.
Embodiment
Fig. 1 is the structural representation of the mobile communications device according to one embodiment of the invention, and Fig. 2 is the floor map of the mobile communications device according to one embodiment of the invention.Please refer to Fig. 1 and Fig. 2, mobile communications device 100 comprises earth element 110, feed-in structure 120 and substrate 130, and mobile communications device 100 can be such as smart mobile phone, panel computer or notebook computer ... etc. the electronic installation with wireless transmission function.Wherein, earth element 110 comprises a slotted eye 101, and earth element 110 is arranged on the first surface of substrate 130.In addition, slotted eye 101 runs through earth element 110, to expose the first surface of substrate 130.
Moreover feed-in structure 120 is across slotted eye 101.For example, the slotted eye 101 cited by Fig. 1 and Fig. 2 extends along-X-direction, and feed-in structure 120 is then configure along Y direction.In other words, feed-in structure 120 configures along the bearing of trend perpendicular to slotted eye 101, with by this across slotted eye 101.In addition, slotted eye 101 has a blind end and an openend, and comprises relative two side SD11 and SD12.Feed-in structure 120 is across relative two side SD11 and SD12.Moreover the shape of slotted eye 101 can be such as yi word pattern, but itself and be not used to limit the present invention.Such as, this area has and usually knows that the shape of slotted eye 101 according to design, and can be changed to L font or other irregular geometric figures by the knowledgeable.
Further, feed-in structure 120 comprises the first transmission line 121, second transmission line 122 and resonant circuit 123.Wherein, resonant circuit 123 is serially connected between the first transmission line 121 and the second transmission line 122.Specifically, the first end of the first transmission line 121 has a load point FP, and the second end of the first transmission line 121 is electrically connected resonant circuit 123.Namely, resonant circuit 123 receives a FD feed by the first transmission line 121.In addition, the first end of the second transmission line 122 is electrically connected resonant circuit 123, and the second end of the second transmission line 122 has an earth point GP.Namely, resonant circuit 123 is electrically connected to earth element 110 by the second transmission line 122.
In one embodiment, the resonant circuit 123 in feed-in structure 120 and the second transmission line 122 can be arranged in slotted eye 101, and are together arranged on the first surface of substrate 130 with earth element 110.In addition, the first transmission line 121 can be made up of a coaxial cable.Moreover in another embodiment, feed-in structure 120 also can be such as floating above earth element 110, and the one of resonant circuit 123, first transmission line 121 and the second transmission line 122 is relative to the slotted eye 101 of earth element 110.In addition, the second end of the second transmission line 122 is connected to earth element 110 by perforation, to form earth point GP.
Operationally, earth element 110 and feed-in structure 120 can form a multifrequency slot antenna.Wherein, multifrequency slot antenna produces one by slotted eye 101 and excites mode to operate in the first frequency range (such as: LTE Band20/GSM850/900).Wherein, the length of slotted eye 101 is 1/8th wavelength of one of the first frequency range low-limit frequency.In addition, the resonant circuit 123 in feed-in structure 120 can excite multifrequency slot antenna.By this, multifrequency slot antenna also produces another by resonant circuit 123 and excites mode, and then operates in the second frequency range (such as: GSM1800/1900/WCDMA Band1).In other words, the multifrequency slot antenna of the present embodiment only needs to arrange the characteristic that single slotted eye 101 just can reach multi-band operation.
It is worth mentioning that, with traditional unipole antenna, loop aerial (loop antenna) or planar inverted F-shape antenna (Planar Inverted F Antenna, PIFA) in comparison, slot antenna inherently takies less antenna empty regions and height.In addition, the multifrequency slot antenna of the present embodiment only needs to arrange the characteristic that single slotted eye just can reach multi-band operation.Therefore, the multifrequency slot antenna of the present embodiment also contributes to the area reducing substrate 130, and then contributes to the development of mobile communications device 100 on thin type.
Fig. 3 is the circuit diagram of the resonant circuit according to one embodiment of the invention.As shown in Figure 3, resonant circuit 123 comprises the first resonating member 310 and the second resonating member 320.In addition, the first resonating member 310 comprises the first electric capacity C31 and inductance L 3, and the second resonating member 320 comprises the second electric capacity C32.Specifically, the first end of the first electric capacity C31 is electrically connected the first transmission line 121, and second end of the first electric capacity C31 is electrically connected to earth element 110.The first end of inductance L 3 is electrically connected the first end of the first electric capacity C31, and the second end of inductance L 3 is electrically connected the second resonating member 320.The first end of the second electric capacity C32 is electrically connected the second end of inductance L 3, and second end of the second electric capacity C32 is electrically connected the second transmission line 122.
First resonating member 310 can utilize the first electric capacity C31 and inductance L 3 to produce and resonate, and the resonance frequency position of the first resonating member 310 is in the second frequency range.Namely, the first resonating member 310 can produce resonance in the second frequency range.By this, under the exciting of the first resonating member 310, multifrequency slot antenna will be operable in the second frequency range.In addition, the second electric capacity C32 in the second resonating member 320 excites mode, to finely tune frequency and the bandwidth of the first frequency range that multifrequency slot antenna is contained by this in order to adjust multifrequency slot antenna under the first frequency range.
It is worth mentioning that, although Fig. 3 embodiment lists the enforcement kenel of the first resonating member and the second resonating member, it is also not used to limit the present invention.For example, Fig. 4 is the circuit diagram of the resonant circuit according to another embodiment of the present invention.As shown in Figure 4, resonant circuit 123 comprises the first resonating member 410 and the second resonating member 420.In addition, the first resonating member 410 is made up of an inductance L 4, and the second resonating member 420 is made up of an electric capacity C4.
At this, the first end of inductance L 4 is electrically connected the first transmission line 121, and the second end of inductance L 4 is electrically connected the second resonating member 420.The first end of electric capacity C4 is electrically connected the second end of inductance L 4, and second end of electric capacity C4 is electrically connected the second transmission line 122.In addition, the first resonating member 410 produces resonance by inductance L 4 in the second frequency range, and then causes multifrequency slot antenna to operate in the second frequency range.On the other hand, the electric capacity C4 in the second resonating member 420 then can excite mode in order to adjust multifrequency slot antenna under the first frequency range.It should be noted that inductance L 3 cited in Fig. 3 and Fig. 4 embodiment is less than 20 nanohenrys (nH) with the inductance value of L4, and the capacitance of its cited electric capacity C31, C32 and C4 is greater than 0.1 pico farad (pF).
Fig. 5 and Fig. 6 is return loss plot and the antenna efficiency figure of the multifrequency slot antenna of foundation one embodiment of the invention.In Fig. 5-6 embodiment, the size of substrate 130 is about 115 × 60mm
2, and close to the smart mobile phone of 4.7 inch.In addition, the resonant circuit 123 in feed-in structure 120 can utilize the resonating member 310 and 320 cited by Fig. 3 to be realized.Accordingly, as seen in figs. 5-6, multifrequency slot antenna will be operable in the first frequency range 510 and the second frequency range 520.In addition, the frequency range of the first frequency range 510 is 791 ~ 960MHz, and multifrequency slot antenna is 46% ~ 83% in the antenna efficiency of the first frequency range 510.Moreover the frequency range of the second frequency range 520 is 1,710 ~ 2,170MHz, and multifrequency slot antenna is 40% ~ 57% in the antenna efficiency of the second frequency range 520.In other words, the characteristic of multifrequency slot antenna can the specification requirement of realistic product, and the operation frequency range of multifrequency slot antenna can contain the frequency ranges such as LTEBand20/GSM850/900/1800/1900/WCDMA Band1.
In sum, the present invention arranges a slotted eye on earth element, and in feed-in structure, arrange a resonant circuit.By this, the present invention can utilize earth element and feed-in structure to form a multifrequency slot antenna.In other words, the multifrequency slot antenna of the present invention only needs to arrange the characteristic that single slotted eye just can reach multi-band operation, and then contributes to the development of mobile communications device on thin type.
Finally it should be noted that above each embodiment is only in order to illustrate technical scheme of the present invention, is not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or to wherein partly or entirely technical characteristic carry out equivalent replacement; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a mobile communications device, is characterized in that, comprising:
One earth element, comprises a slotted eye; And
One feed-in structure, across this slotted eye, and comprises:
One first transmission line and one second transmission line; And
One resonant circuit, is serially connected between this first transmission line and this second transmission line, and this resonant circuit receives a FD feed by this first transmission line, and is electrically connected to this earth element by this second transmission line.
2. mobile communications device according to claim 1, it is characterized in that, this earth element and this feed-in structure form a multifrequency slot antenna, and this multifrequency slot antenna excites mode to operate in one first frequency range by this slotted eye generation one, this resonant circuit excites this multifrequency slot antenna also to operate in one second frequency range to cause this multifrequency slot antenna.
3. mobile communications device according to claim 2, is characterized in that, the length of this slotted eye is 1/8th wavelength of one of this first frequency range low-limit frequency.
4. mobile communications device according to claim 2, is characterized in that, this resonant circuit comprises:
One first resonating member, produces resonance in this second frequency range, operates in this second frequency range to cause this multifrequency slot antenna; And
One second resonating member, excites mode in order to adjust this under this first frequency range of this multifrequency slot antenna.
5. mobile communications device according to claim 4, is characterized in that, this first resonating member comprises:
One first electric capacity, its first end is electrically connected this first transmission line, and the second end of this first electric capacity is electrically connected this earth element; And
One inductance, its first end is electrically connected the first end of this first electric capacity, and the second end of this inductance is electrically connected this second resonating member.
6. mobile communications device according to claim 5, is characterized in that, this second resonating member comprises one second electric capacity, and the first end of this second electric capacity is electrically connected the second end of this inductance, and the second end of this second electric capacity is electrically connected this second transmission line.
7. mobile communications device according to claim 4, is characterized in that, this first resonating member comprises an inductance, and the first end of this inductance is electrically connected this first transmission line, and the second end of this inductance is electrically connected this second resonating member.
8. mobile communications device according to claim 7, is characterized in that, this second resonating member comprises an electric capacity, and the first end of this electric capacity is electrically connected the second end of this inductance, and the second end of this electric capacity is electrically connected this second transmission line.
9. mobile communications device according to claim 1, is characterized in that, the one of this resonant circuit, this first transmission line and this second transmission line is relative to this slotted eye.
10. mobile communications device according to claim 1, is characterized in that, this slotted eye runs through this earth element, and this slotted eye has a blind end and an openend.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310516695.4A CN104577309A (en) | 2013-10-28 | 2013-10-28 | Mobile communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310516695.4A CN104577309A (en) | 2013-10-28 | 2013-10-28 | Mobile communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104577309A true CN104577309A (en) | 2015-04-29 |
Family
ID=53092848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310516695.4A Pending CN104577309A (en) | 2013-10-28 | 2013-10-28 | Mobile communication device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450767A (en) * | 2015-08-12 | 2017-02-22 | 宏碁股份有限公司 | Mobile communication device |
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| US20040227678A1 (en) * | 2003-05-12 | 2004-11-18 | Hrl Laboratories, Llc | Compact tunable antenna |
| CN101019335A (en) * | 2004-08-20 | 2007-08-15 | 皇家飞利浦电子股份有限公司 | Wireless terminal, wireless module and method of manufacturing such a terminal. |
| WO2008139864A1 (en) * | 2007-05-16 | 2008-11-20 | Nec Corporation | Slot antenna |
| US7705795B2 (en) * | 2007-12-18 | 2010-04-27 | Apple Inc. | Antennas with periodic shunt inductors |
| CN101714698A (en) * | 2008-09-05 | 2010-05-26 | 索尼爱立信移动通信股份公司 | Notch antenna and wireless device |
| TW201036254A (en) * | 2009-03-31 | 2010-10-01 | Univ Nat Chiao Tung | A one-eighth wavelength open-end slot antenna |
| CN102456943A (en) * | 2010-10-28 | 2012-05-16 | 宏碁股份有限公司 | Mobile communication device and antenna device |
| TW201306379A (en) * | 2011-07-28 | 2013-02-01 | Univ Nat Sun Yat Sen | Mobile communication device and multiband slot antenna therein |
-
2013
- 2013-10-28 CN CN201310516695.4A patent/CN104577309A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040227678A1 (en) * | 2003-05-12 | 2004-11-18 | Hrl Laboratories, Llc | Compact tunable antenna |
| CN101019335A (en) * | 2004-08-20 | 2007-08-15 | 皇家飞利浦电子股份有限公司 | Wireless terminal, wireless module and method of manufacturing such a terminal. |
| WO2008139864A1 (en) * | 2007-05-16 | 2008-11-20 | Nec Corporation | Slot antenna |
| US7705795B2 (en) * | 2007-12-18 | 2010-04-27 | Apple Inc. | Antennas with periodic shunt inductors |
| CN101714698A (en) * | 2008-09-05 | 2010-05-26 | 索尼爱立信移动通信股份公司 | Notch antenna and wireless device |
| TW201036254A (en) * | 2009-03-31 | 2010-10-01 | Univ Nat Chiao Tung | A one-eighth wavelength open-end slot antenna |
| CN102456943A (en) * | 2010-10-28 | 2012-05-16 | 宏碁股份有限公司 | Mobile communication device and antenna device |
| TW201306379A (en) * | 2011-07-28 | 2013-02-01 | Univ Nat Sun Yat Sen | Mobile communication device and multiband slot antenna therein |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450767A (en) * | 2015-08-12 | 2017-02-22 | 宏碁股份有限公司 | Mobile communication device |
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Application publication date: 20150429 |
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