CN105140651A - Back cavity slot antenna structure - Google Patents
Back cavity slot antenna structure Download PDFInfo
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- CN105140651A CN105140651A CN201510661928.9A CN201510661928A CN105140651A CN 105140651 A CN105140651 A CN 105140651A CN 201510661928 A CN201510661928 A CN 201510661928A CN 105140651 A CN105140651 A CN 105140651A
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- slot antenna
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- antenna
- feed point
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Abstract
The invention discloses a back cavity slot antenna structure comprising a metal cavity which comprises a first cavity part and a second cavity part. The first cavity part and the second cavity part are connected and an L shape is formed. A first slot antenna is formed on the upper surface and the external side surface of the first cavity part. A second slot antenna is formed on the upper surface and the external side surface of the second cavity part. The back cavity slot antenna can be arranged at the corner of portable wireless equipment so that space occupation is small. Meanwhile, signal receiving and transmitting can be realized without influence or interference of other conductive structures on the equipment. 2.4GHz and 5GHz dual wireless frequency band resonance can be realized when there is only one feed point.
Description
Technical field
The present invention relates to a kind of antenna structure, particularly relate to a kind of back of the body chamber slot antenna configurations.
Background technology
In the prior art, carry on the back chamber slot antenna and have Patents, as US6160522A, US4733245A.Conventional back of the body chamber slot antenna comprises resonance metal chamber, and this resonance metal chamber has the slot antenna be fed to by probe, but such cavity needs very large space.The another kind of method used be disresonance chamber is placed on resonant antenna structure surrounding as micro-strip paster antenna or the unipole antenna having dielectric window.This antenna is described in US8125394B2, US8773310B2, US20110050509A1, US8325094B2.These antenna can use in portable radio machine, as mobile phone, and panel computer or notebook computer.One of them advantage of this structure is, due to the existence of the metallic walls of cavity, wireless receiving or transmission can occur under the interference without other elements on PCB.But still need to take larger space.
Summary of the invention
Technical problem to be solved by this invention is: provide one can be placed on portable radio machine corner, and can be applicable to the back of the body chamber slot antenna of two radio band.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of back of the body chamber slot antenna configurations, comprise a metal cavitg, described metal cavitg comprises the first chamber portion and the second chamber portion, described first chamber portion is connected in L-type with the second chamber portion, the upper surface of described first chamber portion and outer surface are formed with the first slot antenna, the upper surface of described second chamber portion and outer surface are formed with the second slot antenna.
Beneficial effect of the present invention is: metal cavitg is L-type, can be placed on the corner of portable radio machine easily, take up room little, meanwhile, can realize reception and the transmission of signal under the impact interference not being subject to other conductive structures on equipment.
Accompanying drawing explanation
Fig. 1 is aerial mounting structure schematic diagram of the present invention;
Fig. 2 a is the antenna structure view of the embodiment of the present invention one;
Fig. 2 b is the antenna feed structure schematic diagram of the embodiment of the present invention one;
Fig. 3 is the antenna structure view of the embodiment of the present invention two;
Fig. 4 is S11 (return loss characteristic) and the global radiation efficiency of antenna in the embodiment of the present invention one and embodiment two;
Fig. 5 is the antenna feed structure schematic diagram of the embodiment of the present invention three;
Fig. 6 a is the circuit diagram of matching network in the embodiment of the present invention four;
Fig. 6 b is the connection diagram of matching network in the embodiment of the present invention four;
Fig. 7 is S11 and the global radiation efficiency of the middle antenna of the embodiment of the present invention three and embodiment four;
Fig. 8 is the structure collectivity schematic diagram after embodiment one and embodiment two cover PC-ABS material layer;
Fig. 9 is the structure collectivity schematic diagram after embodiment three and embodiment four cover PC-ABS material layer.
Label declaration:
1, portable radio machine; 2, chamber slot antenna is carried on the back; 3, the first chamber portion; 4, the second chamber portion; 5, upper surface; 6, outer surface; 7, inner surface; 8, the first slot antenna first branch; 9, the first slot antenna second branch; 10, the second slot antenna first branch; 11, the second slot antenna second branch; 12, metal patch; 13, antenna feed point; 14, feeder cable; 15, outer conductor; 16, inner wire; 17, matching network; 18, capacitor; 19, inductance; 20,50 ohm of ports; 21, PC-ABS material layer.
Embodiment
By describing technology contents of the present invention in detail, realized object and effect, accompanying drawing is coordinated to be explained in detail below in conjunction with execution mode.
The design of most critical of the present invention is: metal cavitg is L-type, and upper surface and outer surface are formed with slot antenna respectively, and slot antenna is encouraged by metal cavitg and supports.
Refer to Fig. 1 to Fig. 3, Fig. 5 to Fig. 6 b and Fig. 8 to Fig. 9, a kind of back of the body chamber slot antenna configurations, comprise a metal cavitg, described metal cavitg comprises the first chamber portion 3 and the second chamber portion 4, described first chamber portion 3 is connected in L-type with the second chamber portion 4, the upper surface 5 of described first chamber portion 3 and outer surface 6 are formed with the first slot antenna, the upper surface 5 of described second chamber portion 4 and outer surface 6 are formed with the second slot antenna.
From foregoing description, beneficial effect of the present invention is: metal cavitg is L-type, the corner of portable radio machine 1 can be placed on easily, take up room little, meanwhile, reception and the transmission of signal can be realized under the impact interference not being subject to other conductive structures on portable radio machine 1.
Further, the corner of described L-type is right angle or fillet.
From foregoing description: the portable radio machine 1 being applicable to different profile.
Further, one end of described first slot antenna is connected in the corner of L-type with one end of the second slot antenna, and the other end of described first slot antenna and the second slot antenna is unsettled.
Further, described first slot antenna or the second slot antenna comprise the first branch and the second branch that be arranged in parallel respectively, and described first branch is positioned at the outer surface 6 of metal cavitg, and described second branch is positioned at the upper surface 5 of metal cavitg.
Further, also comprise a metal patch 12, described metal patch 12 connects described first branch and the second branch.
Further, the feeder cable 14 also comprising antenna feed point 13 and be electrically connected with described antenna feed point 13, an aperture is provided with below the inner surface 7 of described first chamber portion, described feeder cable 14 extends along the direction of the second chamber portion 4, by described aperture and through described first chamber portion 3.
From foregoing description: when only having a distributing point 13, two radio band resonance of 2.4GHz and 5GHz can be realized; Metal patch 12 is set, the bandwidth of the radio band of 5GHz can be increased in, and raises the efficiency; Meanwhile, without any need for extra resonance structure, prevent from reducing antenna efficiency because of the loss of metal.
Further, the feeder cable 14 also comprising antenna feed point 13 and be electrically connected with described antenna feed point 13, described feeder cable 14 is arranged on the inner surface 7 of described second chamber portion 4, and described antenna feed point 13 is located at the upper surface 5 of described second chamber portion 4.
Known from foregoing description: do not need to punch at metal cavitg, feeder cable 14 can be welded on the inner surface 7 of the second chamber portion 4 and not need through the first chamber portion 3.
Further, also comprise matching network 17, described matching network 17 is located between described feeder cable 14 and antenna feed point 13.
Further, described matching network 17 comprises capacitor 18 and an inductance 19 of two series connection, and described inductance 19 one end is connected between two capacitors 18, other end ground connection.
From foregoing description: improve antenna efficiency, the efficiency requirements of antenna at 5GHz frequency band can be met better.
Further, also comprise PC-ABS material layer 21, described PC-ABS material layer 21 covers upper surface 5 and the outer surface 6 of described metal cavitg.
From foregoing description: after covering PC-ABS material layer, slot antenna is invisible from portable radio machine outside, plays certain protective effect to antenna simultaneously.
Embodiment one
Please refer to Fig. 1, Fig. 2 a and Fig. 2 b, embodiments of the invention one are: a kind of back of the body chamber slot antenna configurations, be applicable to the portable radio machines 1 such as mobile phone, panel computer, palmtop PC, described antenna structure comprises a metal cavitg, described metal cavitg comprises the first chamber portion 3 and the second chamber portion 4, and described first chamber portion 3 is connected with the second chamber portion 4 in L-type.
As shown in Figure 1, this back of the body chamber slot antenna 2 can be placed on the corner of portable radio machine 1; Alternatively, the corner of described L-type is right angle or fillet, can the difformity of adaptive portable radio machine 1 better.Metal cavitg comprises upper surface 5, outer surface 6 and inner surface 7, and described upper surface 5 and outer surface 6 can be fitted with the shell of equipment 1.Back of the body chamber slot antenna 2 is placed on the corner of portable radio machine 1, can not be subject to other conductive structures on equipment, as under the impact of the ground plate on display screen, PCB and other elements or interference, realizes reception and the transmission of signal.
As shown in Figure 2 a, the upper surface 5 of described first chamber portion 3 and outer surface 6 are formed with the first slot antenna, the upper surface 5 of described second chamber portion 4 and outer surface 6 are formed with the second slot antenna; One end of described first slot antenna is connected in the corner of L-type with one end of the second slot antenna, and the other end of described first slot antenna and the second slot antenna is unsettled; Described first slot antenna or the second slot antenna comprise the first branch and the second branch that be arranged in parallel respectively, and described first branch is positioned at the outer surface 6 of metal cavitg, and described second branch is positioned on the upper surface 5 of metal cavitg; First slot antenna comprises the first slot antenna first branch 8 and the first slot antenna second branch 9, second slot antenna comprises the second slot antenna first branch 10 and the second slot antenna second branch 11, first slot antenna first branch 8 and the second slot antenna first branch 10 are positioned at the upper surface 5 that outer surface 6, first slot antenna second branch 9 of metal cavitg and the second slot antenna second branch 11 are positioned at metal cavitg; The shape of described branch 8-11 is not unique, and that is, can be the shape shown in Fig. 2 a, also can be that other can allow antenna have the shape of the resonance of required frequency band.Preferably, as shown in the figure, described first branches into strip, and described second branches into U-shaped.
The length of described first chamber portion 3 and the long L of described second chamber portion 4 are 25-40mm, preferred 32mm, and wide W is 3-8mm, preferred 5mm, and high H is 3-10mm, preferred 6mm.
As shown in Figure 2 b, the feeder cable 14 that this back of the body chamber slot antenna 2 also comprises antenna feed point 13 and is electrically connected with described antenna feed point 13, described antenna feed point 13 is positioned at the first chamber portion 3, alternatively, is positioned at the lower limb of the first slot antenna first branch 8 near corner; Be provided with an aperture below the inner surface 7 of described first chamber portion 3, alternatively, described aperture can at the first chamber portion 3 Anywhere; Described feeder cable 14 extends along the direction of the second chamber portion 4, by described aperture and through described first chamber portion 3; Distributing point 13 can directly be connected with feeder cable 14, also can be connected with feeder cable 14 with one section of outer conductor 15 as illustrated by one section of inner wire 16.Described inner wire 16 connects up at the outer surface 6 of the first chamber portion 3, can be inner at metal cavitg; Outer conductor 15 extends to outside metal cavitg.
Embodiment two
Please refer to Fig. 3, embodiments of the invention two are with the difference of embodiment one: this back of the body chamber slot antenna 2 also comprises a metal patch 12, described metal patch 12 connects described first branch and the second branch, described metal patch can be one or more, for connecting the first gap first branch 8 and the first gap second branch 9, and/or the second slot antenna first branch 10 and the second slot antenna second branch 11.
By introducing metal patch 12, changing the current pass of electric current, to be increased in the bandwidth of the radio band of 5GHz, and improving antenna radiation efficiency.
The analog result of the S parameter and global radiation efficiency that are illustrated in figure 4 the embodiment of the present invention one and embodiment two compares schematic diagram, and wherein " withshort " is the result of embodiment two.The S parameter tolerance interval of usual antenna match is for being less than-6dB, as can be seen from the figure, both can meet the demands at the matching performance of 2.4GHz frequency range, but it is then slightly poor on some frequencies of 5GHz frequency range, but global radiation efficiency reaches-7dB and-6dB respectively at 2.4GHz and 5GHz frequency band, meet the designing requirement of WIFI antenna, therefore, the result of above-mentioned S parameter is also acceptable.In addition, can find out, the radiation efficiency of the antenna structure of embodiment two compares embodiment one, increases in 5GHz frequency band, then slightly declines in 2.4GHz frequency band.
Embodiment three
Please refer to Fig. 5, embodiments of the invention three are from the difference of embodiment one: the position of distributing point and feeder cable is different.In addition, in Fig. 5, the first branch of slot antenna is different from embodiment one with the second branch location, and in Fig. 5, the first branch is at upper surface, and the second branch is at outer surface, but in fact it also can be identical with embodiment one.
The feeder cable 14 of the present embodiment is arranged on the inner surface 7 of described second chamber portion 4, and described antenna feed point 13 is located in the second gap first branch 10 of described second chamber portion 4 upper surface 5.
Identical with embodiment one, distributing point 13 can directly be connected with feeder cable 14, can be connected with feeder cable 14 with one section of outer conductor 15 as illustrated by one section of inner wire 16, but described inner wire 16 can connect up at the upper surface 5 of the second chamber portion 4, described outer conductor 15 is outside at metal cavitg.The present embodiment does not need to punch on the surface at metal cavitg, and feeder cable 14 can be welded on the second chamber portion 4 easily inner surface 7 on and do not need through the first chamber portion 3, improve feeding flexibility.
Embodiment four
The difference of embodiments of the invention four and embodiment three is: between feeder cable 14 and antenna feed point 13, arrange a matching network 17.Being the circuit diagram of matching network as shown in Figure 6 a, is the annexation of matching network as shown in Figure 6 b.Described matching network 17 comprises capacitor 18 and an inductance 19 of two series connection, and described inductance 19 one end is connected between two capacitors 18, other end ground connection; Capacitor 18 one end of two series connection is electrically connected described feeder cable by 50 ohm of ports 20, and the other end connects antenna feed point; Wherein, C1=0.6pF, C2=0.8pF, L1=7.4nF; Alternatively, described matching network 17 can also be other structure, and this depends on the measured value of S11.Matching network coupling antenna impedance is as far as possible close to 50 ohm of feed source impedances, and this guarantees that feeding source is maximum through-put power to antenna, because may produce minimal reflection due to impedance mismatch.Alternatively, matching network 17 can be placed in metal cavitg.
The analog result of the S parameter and global radiation efficiency that are illustrated in figure 7 the embodiment of the present invention three and embodiment four compares schematic diagram, and wherein " MN " is the result of embodiment four., as can be seen from the figure, the antenna of embodiment three meets the requirement at 2.4GHz frequency band, and the requirement of most of frequency band in 5GHz frequency band, but for some high frequency bands in 5GHz frequency band, antenna efficiency is lower.In embodiment four, the introducing of matching network then substantially improves S parameter and the radiation efficiency of 5GHz frequency range, can meet the efficiency requirements of 5GHz frequency band.
Embodiment five
Please refer to Fig. 8 and Fig. 9, embodiments of the invention five are the optimization of above-described embodiment, and this back of the body chamber slot antenna 2 also comprises PC-ABS material layer 21, and described PC-ABS material layer 21 covers upper surface 5 and the outer surface 6 of described metal cavitg; Alternatively, described PC-ABS material layer 21 thickness is 0.5-2mm, preferred 1mm.
Fig. 8 is the structure collectivity schematic diagram after embodiment one and embodiment two cover PC-ABS material layer 21; Fig. 9 is the structure collectivity schematic diagram after embodiment three and embodiment four cover PC-ABS material layer 21.
Because metal cavitg covers PC-ABS material layer 21, antenna appearance is succinctly attractive in appearance, can play certain protective effect to antenna simultaneously.
In sum, back of the body chamber provided by the invention slot antenna configurations, can be placed on the corner of portable radio machine, take up room little; When only having a distributing point, realize 2.4GHz and 5GHz dual-frequency resonance; Meanwhile, without any need for extra resonance structure, prevent from reducing antenna efficiency because of the loss of metal; And it is specious.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalents utilizing specification of the present invention and accompanying drawing content to do, or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a back of the body chamber slot antenna configurations, comprise a metal cavitg, it is characterized in that: described metal cavitg comprises the first chamber portion and the second chamber portion, described first chamber portion is connected in L-type with the second chamber portion, the upper surface of described first chamber portion and outer surface are formed with the first slot antenna, the upper surface of described second chamber portion and outer surface are formed with the second slot antenna.
2. back of the body chamber according to claim 1 slot antenna configurations, is characterized in that: the corner of described L-type is right angle or fillet.
3. back of the body chamber according to claim 1 slot antenna configurations, it is characterized in that: one end of described first slot antenna is connected in the corner of L-type with one end of the second slot antenna, the other end of described first slot antenna and the second slot antenna is unsettled.
4. back of the body chamber according to claim 3 slot antenna configurations, it is characterized in that: described first slot antenna or the second slot antenna comprise the first branch and the second branch that be arranged in parallel respectively, described first branch is positioned at the outer surface of metal cavitg, and described second branch is positioned at the upper surface of metal cavitg.
5. back of the body chamber according to claim 4 slot antenna configurations, is characterized in that: also comprise a metal patch, and described metal patch connects described first branch and the second branch.
6. carry on the back chamber slot antenna configurations according to claim 1 or 5, it is characterized in that: the feeder cable also comprising antenna feed point and be electrically connected with described antenna feed point, an aperture is provided with below the inner surface of described first chamber portion, described feeder cable extends along the direction of the second chamber portion, by described aperture and through described first chamber portion.
7. back of the body chamber according to claim 1 slot antenna configurations, it is characterized in that: the feeder cable also comprising antenna feed point and be electrically connected with described antenna feed point, described feeder cable is arranged on the inner surface of described second chamber portion, and described antenna feed point is located at described second chamber portion upper surface.
8. back of the body chamber according to claim 7 slot antenna configurations, it is characterized in that: also comprise matching network, described matching network is located between described feeder cable and antenna feed point.
9. back of the body chamber according to claim 8 slot antenna configurations, is characterized in that: described matching network comprises capacitor and an inductance of two series connection, and described inductance one end is connected between two capacitors, other end ground connection.
10. back of the body chamber according to claim 1 slot antenna configurations, is characterized in that: also comprise PC-ABS material layer, the upper surface of metal cavitg described in described PC-ABS layer of material covers and outer surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510661928.9A CN105140651B (en) | 2015-10-14 | 2015-10-14 | Carry on the back chamber slot antenna configurations |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510661928.9A CN105140651B (en) | 2015-10-14 | 2015-10-14 | Carry on the back chamber slot antenna configurations |
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| CN105140651A true CN105140651A (en) | 2015-12-09 |
| CN105140651B CN105140651B (en) | 2018-02-09 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105244626A (en) * | 2015-11-02 | 2016-01-13 | 深圳市信维通信股份有限公司 | Cavity backed slot antenna structure |
| CN106773624A (en) * | 2016-12-20 | 2017-05-31 | 深圳市信维通信股份有限公司 | A kind of antenna structure and all-metal wrist-watch |
| CN107834179A (en) * | 2017-11-27 | 2018-03-23 | 深圳市信维通信股份有限公司 | A kind of WIFI antennas of all-metal back-cover |
| CN110199435A (en) * | 2017-01-13 | 2019-09-03 | 华为技术有限公司 | Mobile device with multiaerial system |
| CN112805878A (en) * | 2018-10-10 | 2021-05-14 | 华为技术有限公司 | Broadband vertical polarization end-fire antenna |
| CN114171893A (en) * | 2021-11-01 | 2022-03-11 | 荣耀终端有限公司 | Antenna and electronic equipment |
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| CN101345341A (en) * | 2007-07-13 | 2009-01-14 | 清华大学 | Multiband antenna |
| JP2010187107A (en) * | 2009-02-10 | 2010-08-26 | Konica Minolta Holdings Inc | Electronic device |
| US20110241943A1 (en) * | 2010-03-30 | 2011-10-06 | Sam Shiu | Methods for forming cavity antennas |
| CN205039259U (en) * | 2015-10-14 | 2016-02-17 | 深圳市信维通信股份有限公司 | Back of body chamber slot antenna structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101345341A (en) * | 2007-07-13 | 2009-01-14 | 清华大学 | Multiband antenna |
| JP2010187107A (en) * | 2009-02-10 | 2010-08-26 | Konica Minolta Holdings Inc | Electronic device |
| US20110241943A1 (en) * | 2010-03-30 | 2011-10-06 | Sam Shiu | Methods for forming cavity antennas |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244626A (en) * | 2015-11-02 | 2016-01-13 | 深圳市信维通信股份有限公司 | Cavity backed slot antenna structure |
| CN106773624A (en) * | 2016-12-20 | 2017-05-31 | 深圳市信维通信股份有限公司 | A kind of antenna structure and all-metal wrist-watch |
| CN110199435A (en) * | 2017-01-13 | 2019-09-03 | 华为技术有限公司 | Mobile device with multiaerial system |
| CN110199435B (en) * | 2017-01-13 | 2021-09-14 | 华为技术有限公司 | Mobile device with multiple antenna system |
| CN113972477A (en) * | 2017-01-13 | 2022-01-25 | 华为技术有限公司 | Mobile device with multiple antenna system |
| US11552391B2 (en) | 2017-01-13 | 2023-01-10 | Futurewei Technologies, Inc. | Mobile device with multiple-antenna system |
| CN107834179A (en) * | 2017-11-27 | 2018-03-23 | 深圳市信维通信股份有限公司 | A kind of WIFI antennas of all-metal back-cover |
| CN107834179B (en) * | 2017-11-27 | 2023-08-11 | 深圳市信维通信股份有限公司 | WIFI antenna of all-metal back cover |
| CN112805878A (en) * | 2018-10-10 | 2021-05-14 | 华为技术有限公司 | Broadband vertical polarization end-fire antenna |
| CN114171893A (en) * | 2021-11-01 | 2022-03-11 | 荣耀终端有限公司 | Antenna and electronic equipment |
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