CN104241873A - Antenna and communication device provided with same - Google Patents

Antenna and communication device provided with same Download PDF

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Publication number
CN104241873A
CN104241873A CN201310239454.XA CN201310239454A CN104241873A CN 104241873 A CN104241873 A CN 104241873A CN 201310239454 A CN201310239454 A CN 201310239454A CN 104241873 A CN104241873 A CN 104241873A
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antenna
antenna element
feeder line
pifa
frequency resonant
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CN201310239454.XA
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CN104241873B (en
Inventor
林辉
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Lenovo Beijing Ltd
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Lenovo Beijing Ltd
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Priority to CN201310239454.XA priority Critical patent/CN104241873B/en
Priority claimed from CN201310239454.XA external-priority patent/CN104241873B/en
Publication of CN104241873A publication Critical patent/CN104241873A/en
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Publication of CN104241873B publication Critical patent/CN104241873B/en
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Abstract

The embodiment of the invention provides an antenna and a communication device provided with the same and relates to the communication field. Better antenna performance can be realized under the condition that the height of the antenna is limited. The antenna comprises a first antenna unit connected with a first feeder line and a second feeder line and used for generating high-frequency resonance, and a second antenna unit coupled with the second feeder line and used for generating low-frequency resonance. The antenna is used for electromagnetic wave transmission of the communication device provided with the antenna.

Description

A kind of antenna and be provided with the communication equipment of this antenna
Technical field
The present invention relates to the communications field, particularly relate to a kind of antenna and be provided with the communication equipment of this antenna.
Background technology
Antenna is a kind of converter, and it, the guided wave of transmission above-the-line promotion, is transformed into the electromagnetic wave propagated in unbounded medium, or the electromagnetic wave propagated in unbounded medium, is transformed into the guided wave propagated on the transmission line.Antenna can be launched or receive electromagnetic wave in wireless device.The engineering systems such as radio communication, broadcast, TV, every electromagnetic wave that utilizes carrys out transmission of information, all needs to rely on antenna to carry out work.
Along with the development of science and technology, mobile phone, as a kind of terminal equipment utilizing electromagnetic wave signal work, is subject to the extensive concern in market.Performance due to traditional antenna depends on the height that antenna is arranged to a great extent, and therefore the thickness of mobile phone and the performance of antenna present positively related relation to a certain extent, and that is thicker mobile phone more easily obtains good antenna performance.But under the market trend of fashion-orientation and portability, user tends to frivolous portative mobile phone more, if but mobile phone adopts ultra-thin design, the height that antenna can be arranged just receives restriction, therefore the performance of antenna also can be affected, especially the impact that is subject to of the low frequency performance of antenna is particularly remarkable, although visual effect is better when causing user to use mobile phone, and the problem that experience sense is not good.
Summary of the invention
Embodiments of the invention provide a kind of antenna and are provided with the communication equipment of this antenna, when antenna height is limited, can provide better antenna performance.
For achieving the above object, embodiments of the invention adopt following technical scheme:
On the one hand, the embodiment of the present invention provides a kind of antenna, comprising:
The first antenna element be connected with the first feeder line and the second feeder line respectively, for generation of high-frequency resonant;
The second antenna element be of coupled connections with described second feeder line, for generation of low-frequency resonant.
On the other hand, the embodiment of the present invention provides a kind of communication equipment, comprising:
Above-mentioned antenna;
Mainboard, for carrying the first antenna element, the second antenna element, the first feeder line and the second feeder line.
The embodiment of the present invention provides a kind of antenna and is provided with the communication equipment of this antenna, antenna comprises the first antenna element be connected with the first feeder line and the second feeder line respectively, and the second antenna element to be of coupled connections with the second feeder line, wherein, first antenna element is for generation of high-frequency resonant, second antenna element is for generation of low-frequency resonant, so, utilize triggering two antenna element work of two feeder lines respectively, produce high-frequency resonant and low-frequency resonant respectively, and not be used in as prior art, owing to needing to make to produce the antenna that high-frequency resonant can produce again low-frequency resonant, therefore be subject to arranging the restriction of antenna height to ensure to produce the bandwidth of resonance.There is provided high-frequency resonant and low-frequency resonant when antenna height is limited, required high-frequency resonant and low-frequency resonant can be provided so respectively, thus better antenna performance is provided.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the antenna that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the first feeder line and the second feeder line in the antenna that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the first antenna element in the antenna that Fig. 3 provides for the embodiment of the present invention;
The side-looking structural representation of the antenna that Fig. 4 provides for the embodiment of the present invention;
The side-looking structural representation of the antenna that Fig. 5 provides for another embodiment of the present invention;
The plan structure schematic diagram of the communication equipment that Fig. 6 provides for the embodiment of the present invention;
The plan structure schematic diagram of the communication equipment that Fig. 7 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of antenna 10, and be applied to one and utilize electromagnetic communication equipment, this communication equipment can be mobile phone or panel computer etc., and the embodiment of the present invention is not limited thereto, and as shown in Figure 1, antenna 10 comprises:
The first antenna element 103, first antenna element 103 be connected with the first feeder line 101 and the second feeder line 102 is respectively for generation of high-frequency resonant;
And the second antenna element 104, second antenna element 104 be of coupled connections with the second feeder line 102 is for generation of low-frequency resonant.
Exemplary, first antenna element 103 is PIFA (planar inverted F-shaped antenna, planar inverted F-shape antenna), or IFA (inverted F-shaped antenna, inverted F shaped antenna), the second antenna element is slot antenna, in the gap that general embedding mainboard is reserved, wherein, the wavelength of slot antenna can be 1/4 wavelength.
It should be noted that, the first antenna element that the embodiment of the present invention provides can be PIFA antenna, also can be IFA antenna.Wherein, PIFA antenna is developed by microstrip antenna, and have the advantages such as miniaturization, easy of integration, good directionality, therefore application prospect is very wide, especially can carry out positive propagation and employment on electronic fuse; IFA antenna is merging a kind of new ideas antenna that the basis of PIFA antenna and monopole antenna develops, the plurality of advantages such as have low section, small size, high efficiency, bandwidth is abundant, antijamming capability is strong.Therefore, PIFA antenna and IFA antenna are specially adapted to various miniaturization, ultra-thin communication terminal.
Same, the second antenna element that the embodiment of the present invention provides is slot antenna, and wherein, slot antenna is the antenna formed that cracks on conductor surface, there is miniaturization, broadband, the advantage such as cheap, in the equipment such as be generally applicable to the radar of microwave band, navigation, electronic countermeasures and communicate.
It is worthy of note, as shown in Figure 2, first antenna element 103 and the second antenna element 104 can be merged by one end, the first feeder line 101 that the other end separates and the second feeder line 102 carry out feed, namely the first antenna element 103 and the second antenna element 104 can be regarded as a feeder line, this feeder line is divided into two layers, and upper strata feeder line is the first feeder line 101, and lower floor's feeder line is the second feeder line 102.
It should be noted that, the second feeder line 102 and the second antenna element 104 are of coupled connections, and carry out couple feed to the second antenna element 104.Couple feed is not contacting with each other, but have the conduction being carried out electric flux between the second feeder line 102 of certain distance and the second antenna element 104 by the mode of coupling.The second antenna element 104 can be made to obtain energy when not having directly contact with electric flux conducting system.Second feeder line 102 can be arranged on about 1mm place above the second antenna element 104, if the second antenna element 104 is slot antenna, so the second feeder line 102 can arrange with slot antenna above at least 1mm place, and not parallel with slot antenna.As, the second feeder line 102 is arranged on apart from slot antenna 1mm place and with the parallel plane plane in slot antenna place, the second feeder line 102 is an angle of 90 degrees with slot antenna, or the second feeder line 102 and slot antenna are in being greater than 1 degree and being less than an angle of 90 degrees.
Further, as shown in Figure 3, the first antenna element 103 comprises earth point 1031 and feedback point 1032, and radiant body plane 1033.
It should be noted that, first antenna element 103 can be connected with feeder line not in accordance with the standard type provided in Fig. 3, because earth point 1031 and feedback point 1032 are all metal materials, also can mould other forms by bending or other means, the present invention does not limit.
Preferably, in order to save space, can as shown in Figure 4, be connected by the feedback point 1032 of the first feeder line 101 with the first antenna element 103 (not marking in figure), the second feeder line 102 is connected with the earth point 1031 of the first antenna element 103.Can vertically with the second feeder line 102 place with the second antenna element 104 that the second feeder line 102 is of coupled connections; because Fig. 4 is end view; therefore; a round dot can only be seen with vertically disposed second antenna element 104 of the second feeder line 102; but the embodiment of the present invention not with the second antenna element 104 with the vertical position relationship placed of the second feeder line 102 for limiting, other position relationships that can produce couple feed are all within protection range.
Further, first antenna element 103 is PIFA or IFA, when second antenna element 104 is slot antenna, the radiant body plane parallel of PIFA or IFA is arranged at directly over this slot antenna, and the geometric center of the radiant body plane of PIFA or IFA can be alignd with the geometric center of this slot antenna.
It is worthy of note, when first antenna element 103 is PIFA, well played to make the performance of PIFA, the height that PIFA is arranged, as the radiant body plane 1033 in PIFA should be more than or equal to 6.5mm apart from the height of mainboard, the length of radiant body plane 1033 is more than or equal to 20mm, and width is more than or equal to 10mm; And remaining on 50 ohm from radio frequency testing mouth to the impedance of lead-in wire of feedback point 1032, the device of the vicinity of PIFA should do the best possible shielding, reduces the impact on antenna performance.
When first antenna element 103 is IFA, to the height of radiant body plane 1033 and the not specific requirement of the area of radiant body plane 1033, obtain the resonance frequency needed through debugging, compared with PIFA, IFA generally more is arranged on support inclined-plane and side, and PIFA generally does in chassis plane.
When second antenna element 104 is slot antenna, adopt the slot antenna of 1/4 wavelength, and the size slot antenna of 1/4 wavelength being arranged on the narrow edge direction in gap is comparatively large, in the gap that curvature is less, levels off to desirable gap to make gap as much as possible.This is because when slot antenna is arranged in infinitely great and infinitely thin ideal conducting plane, this ideal is desirable gap to plane gap.Electric field on desirable gap is vertical with the long limit in gap, and its amplitude drops to zero at the two ends in gap.This Electric Field Distribution is just the same with the Distribution of Magnetic Field had on the conductor oscillator of same size.According to the duality of electromagnetic field, the electromagnetic field of desirable gap institute radiation has identical structure with the electromagnetic field that complementary oscillator produces, just the electric field intensity of oscillator corresponds to the magnetic vector in gap, and the magnetic vector of oscillator corresponds to the electric field intensity in gap.Therefore.For the actual gap on limited conducting plane or curved surface, as long as conductor surface size is more much bigger than wavelength, particularly the size of the narrow edge direction in gap is comparatively large, and curvature is less, then its fundamental characteristics is just similar to desirable gap.
It is worthy of note, due to present multi-frequency band mobile phone, high frequency needs to support DCS (Distributed Control Systems, scattered control system), PCS (Personal Communications Service, person-to-person communication is served) and WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)) etc. multiple frequency range, so the bandwidth range of antenna 10 possibly cannot cover so large high-frequency range simultaneously, or, if need to reach such high-frequency range, need the first antenna element 103, as the radiant body level of PIFA or the radiant body area of plane make the restriction of minimum value, to make antenna 10 more frivolous, the matching network that can regulate can also be increased before feeder line, the different impedances provided by matching network meet the demand expanding high frequency bandwidth.
You need to add is that, impedance matching is the specific matching relationship in signals transmission between load impedance and information source internal impedance, before feeder line, increase the matching network that can regulate, the different impedances provided by matching network can expand the high frequency bandwidth of antenna, improve the performance of antenna.
Exemplary, as shown in Figure 5, antenna 10, also comprises:
RF (Radio Frequency, the radio frequency) switch 105 be connected with feedback point 1032, for selecting different external match circuits, to expand the bandwidth of the first antenna element 103 high-frequency resonant.
Exemplary, be provided with multiple external match circuit, the different match circuit of RF switch connection can be respectively the first antenna element 103 (not marking in figure) provides different impedances, if the first antenna element 103 is PIFA, the impedance that match circuit A provides is 51 ohm, and the impedance that match circuit B provides is 53 ohm, the impedance that match circuit C provides is 49 ohm, so, time demand high-frequency resonant is maximum, match circuit B selected by RF switch.In order to make PIFA performance good, the impedance that different match circuits provides need regulate at 50 ohms.Only illustrate with this, the resistance value do not provided with the match circuit provided or quantity are for limiting herein.
The embodiment of the present invention provides a kind of antenna 10, antenna 10 comprises the first antenna element 103 be connected with the first feeder line 101 and the second feeder line 102 respectively, and the second antenna element 104 to be of coupled connections with the second feeder line 102, wherein, first antenna element 103 is for generation of high-frequency resonant, second antenna element 104 is for generation of low-frequency resonant, so, utilize triggering two antenna 10 cell operation of two feeder lines respectively, produce high-frequency resonant and low-frequency resonant respectively, and not be used in as prior art, owing to needing to make to produce the antenna 10 that high-frequency resonant can produce again low-frequency resonant, therefore be subject to arranging antenna 10 restriction highly to ensure the bandwidth of generation resonance.There is provided high-frequency resonant and low-frequency resonant when antenna 10 is height-limited, required high-frequency resonant and low-frequency resonant can be provided so respectively, thus better antenna 10 performance is provided.
The communication equipment 1 of what the embodiment of the present invention provided the have antenna 10 that above-described embodiment provides, as shown in Figure 6, comprising:
Antenna 10 and mainboard 11, wherein, antenna 10 comprises the first antenna element 103 be connected with the first feeder line 101 and the second feeder line 102 respectively, and, the second antenna element 104 be of coupled connections with the second feeder line 102, first antenna element 103 is for generation of high-frequency resonant, and the second antenna element 104 is for generation of low-frequency resonant.Mainboard 11 is for carrying the first antenna element 103, second antenna element 10 and the first feeder line 101 and the second feeder line 102.
Exemplary, the first antenna element 103 is PIFA, or IFA, and the second antenna element is slot antenna, and in the gap that general embedding mainboard is reserved, wherein, the wavelength of slot antenna can be the slot antenna of 1/4 wavelength.
It should be noted that, the first antenna element that the embodiment of the present invention provides can be PIFA antenna, also can be IFA antenna.Wherein, PIFA antenna is developed by microstrip antenna, and have the advantages such as miniaturization, easy of integration, good directionality, therefore application prospect is very wide, especially can carry out positive propagation and employment on electronic fuse; IFA antenna is merging a kind of new ideas antenna that the basis of PIFA antenna and monopole antenna develops, the plurality of advantages such as have low section, small size, high efficiency, bandwidth is abundant, antijamming capability is strong.Therefore, PIFA antenna and IFA antenna are specially adapted to various miniaturization, ultra-thin communication terminal.
Same, the second antenna element that the embodiment of the present invention provides is slot antenna, and wherein, slot antenna is the antenna formed that cracks on conductor surface, there is miniaturization, broadband, the advantage such as cheap, in the equipment such as be generally applicable to the radar of microwave band, navigation, electronic countermeasures and communicate.
It should be noted that, in communication equipment 1, if the first antenna element 103 is PIFA, then the pad of the feedback point of PIFA should be not less than 2mm*3mm, and can be placed in antenna area by PIFA, and wherein, antenna area can suitably drive a little location hole.
Further, in order to not produce larger impact to the reception of antenna and emitting performance, in communication equipment 1, in the surrounding 7mm of built-in first antenna element 103 and the second antenna element 104, the larger metal objects such as motor can not be had.Structural member near first antenna element 103 and the second antenna element 104 or structural plane do not spray the conductive materials such as conductive paint.If the first antenna element 103 and the second antenna element 104 are arranged on antenna for mobile phone and go in district, then do not carry out electroplating technology near antenna for mobile phone district, and avoid design Metal decorative part etc.First antenna element 103 and the second antenna element 104 should at more than 5mm with the spacing of battery of mobile phone.
It should be noted that, the position arranged as the first antenna element 103 in Fig. 6 needs near corner, if the first antenna element 103 is PIFA, when second antenna element 104 is slot antenna, directly over PIFA setting and slot antenna, the radiant body plane of PIFA and the distance of mainboard are more than or equal to 6.5mm, and PIFA and slot antenna are arranged on distance mainboard AD limit be about 10mm, AB limit is about 20mm place, or, distance mainboard AB limit is about 10mm, AD limit is about 20mm place, herein only with the explanation of shown position distance, PIFA and slot antenna can also be arranged near B, the corner of C or D, distance also can according to the large minor mode of mainboard, not as restriction.
Further, as shown in Figure 7, communication equipment 1, also comprises:
At least one match circuit 12, is respectively used to provide different impedances by RF switch 105 to the first antenna element 103, to expand the bandwidth of the first antenna element 103 high-frequency resonant.
Exemplary, first antenna element 103 is IFA, the impedance that first match circuit 121 provides is 51 ohm, the impedance that second match circuit 122 provides is 45 ohm, 3rd impedance that match circuit 123 provides is 60 ohm, so, when the impedance of high-frequency resonant demand is about 51 ohm, match circuit 121 selected by RF switch 105, when the impedance of high-frequency resonant demand is about 45 ohm, match circuit 122 selected by RF switch 105, and when the impedance of high-frequency resonant demand is about 60 ohm, match circuit 123 selected by RF switch 105.Only illustrate with this, the resistance value do not provided with the match circuit 12 provided or quantity are for limiting herein.
It should be noted that, in communication equipment 1, the structure of the first antenna element 103 is illustrated in the above-described embodiments, repeats no more herein.
The embodiment of the present invention provides a kind of communication equipment 1, communication equipment 1 comprises antenna 10 and mainboard 11, wherein, antenna 10 comprises the first antenna element 103 be connected with the first feeder line 101 and the second feeder line 102 respectively, and the second antenna element 104 to be of coupled connections with the second feeder line 102, wherein, first antenna element 103 is for generation of high-frequency resonant, second antenna element 104 is for generation of low-frequency resonant, so, utilize triggering two antenna element work of two feeder lines respectively, produce high-frequency resonant and low-frequency resonant respectively, and not be used in as prior art, owing to needing to make to produce the antenna 10 that high-frequency resonant can produce again low-frequency resonant, therefore be subject to arranging antenna 10 restriction highly to ensure the bandwidth of generation resonance.There is provided high-frequency resonant and low-frequency resonant when antenna 10 is height-limited, required high-frequency resonant and low-frequency resonant can be provided so respectively, thus better antenna 10 performance is provided.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.

Claims (9)

1. an antenna, is characterized in that, comprising:
The first antenna element be connected with the first feeder line and the second feeder line respectively, for generation of high-frequency resonant;
The second antenna element be of coupled connections with described second feeder line, for generation of low-frequency resonant.
2. antenna according to claim 1, is characterized in that,
Described first antenna element comprises earth point and feedback point;
Described first feeder line is connected with the feedback point of described first antenna element, and described second feeder line is connected with the earth point of described first antenna element.
3. antenna according to claim 2, is characterized in that, also comprises:
The radio frequency switch be a little connected is presented, for selecting different external match circuits, to expand the bandwidth of described first antenna element high-frequency resonant with described.
4., according to the arbitrary described antenna of claims 1 to 3, it is characterized in that,
Described first antenna element is planar inverted F-shape antenna PIFA, or inverted F shaped antenna IFA;
Described second antenna element is slot antenna.
5. antenna according to claim 4, is characterized in that,
The radiant body plane parallel of described PIFA or described IFA is arranged at directly over described slot antenna.
6. the antenna according to claim 4 or 5, is characterized in that, comprising:
If described first antenna element is described PIFA, then the radiant body plane length of described PIFA is more than or equal to 20mm, and width is more than or equal to 10mm.
7. a communication equipment, is characterized in that, comprising:
Antenna described in any one of claim 1 to 6;
Mainboard, for carrying the first antenna element, the second antenna element, the first feeder line and the second feeder line.
8. communication equipment according to claim 7, is characterized in that,
If described first antenna element is PIFA, then the radiant body plane of described PIFA and the distance of described mainboard are more than or equal to 6.5mm.
9. the communication equipment according to claim 7 or 8, is characterized in that, also comprises:
At least one match circuit, is respectively used to provide different impedances by radio frequency switch to described first antenna element, to expand the bandwidth of described first antenna element high-frequency resonant.
CN201310239454.XA 2013-06-17 A kind of antenna and the communication equipment for being provided with the antenna Active CN104241873B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310239454.XA CN104241873B (en) 2013-06-17 A kind of antenna and the communication equipment for being provided with the antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310239454.XA CN104241873B (en) 2013-06-17 A kind of antenna and the communication equipment for being provided with the antenna

Publications (2)

Publication Number Publication Date
CN104241873A true CN104241873A (en) 2014-12-24
CN104241873B CN104241873B (en) 2018-08-31

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WO2017117944A1 (en) * 2016-01-06 2017-07-13 乐视控股(北京)有限公司 Dual-frequency wi-fi antenna and mobile terminal
CN108566482A (en) * 2018-03-12 2018-09-21 广东欧珀移动通信有限公司 Switching method, device, storage medium and the electronic equipment of antenna feed point
US10218052B2 (en) 2015-05-12 2019-02-26 Apple Inc. Electronic device with tunable hybrid antennas
CN109716583A (en) * 2016-11-29 2019-05-03 株式会社村田制作所 Antenna assembly and electronic equipment
CN110972417A (en) * 2019-12-23 2020-04-07 Oppo广东移动通信有限公司 Wave-transparent shell assembly, preparation method thereof, antenna assembly and electronic equipment
CN112448139A (en) * 2019-08-30 2021-03-05 Oppo广东移动通信有限公司 Antenna assembly and electronic equipment

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CN102150326A (en) * 2008-09-10 2011-08-10 Ace技术株式会社 Multiband antenna using electromagnetic coupling

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10218052B2 (en) 2015-05-12 2019-02-26 Apple Inc. Electronic device with tunable hybrid antennas
WO2017117944A1 (en) * 2016-01-06 2017-07-13 乐视控股(北京)有限公司 Dual-frequency wi-fi antenna and mobile terminal
CN109716583A (en) * 2016-11-29 2019-05-03 株式会社村田制作所 Antenna assembly and electronic equipment
CN109716583B (en) * 2016-11-29 2020-09-04 株式会社村田制作所 Antenna device and electronic apparatus
CN108566482A (en) * 2018-03-12 2018-09-21 广东欧珀移动通信有限公司 Switching method, device, storage medium and the electronic equipment of antenna feed point
CN112448139A (en) * 2019-08-30 2021-03-05 Oppo广东移动通信有限公司 Antenna assembly and electronic equipment
CN112448139B (en) * 2019-08-30 2023-12-22 Oppo广东移动通信有限公司 Antenna assembly and electronic equipment
CN110972417A (en) * 2019-12-23 2020-04-07 Oppo广东移动通信有限公司 Wave-transparent shell assembly, preparation method thereof, antenna assembly and electronic equipment

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