CN112531343A - Antenna system and electronic equipment - Google Patents
Antenna system and electronic equipment Download PDFInfo
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- CN112531343A CN112531343A CN202011387229.7A CN202011387229A CN112531343A CN 112531343 A CN112531343 A CN 112531343A CN 202011387229 A CN202011387229 A CN 202011387229A CN 112531343 A CN112531343 A CN 112531343A
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- 230000008878 coupling Effects 0.000 claims abstract description 22
- 238000010168 coupling process Methods 0.000 claims abstract description 22
- 238000005859 coupling reaction Methods 0.000 claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims 2
- 238000002955 isolation Methods 0.000 abstract description 25
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 16
- CNQCVBJFEGMYDW-UHFFFAOYSA-N lawrencium atom Chemical compound [Lr] CNQCVBJFEGMYDW-UHFFFAOYSA-N 0.000 description 15
- 238000010586 diagram Methods 0.000 description 12
- 230000006870 function Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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Abstract
The application discloses antenna system and electronic equipment includes: a substrate, a first antenna element, a second antenna element, and a third antenna element; the first antenna element, the second antenna element and the third antenna element are all arranged on the substrate, the third antenna element is positioned between the first antenna element and the second antenna element, and the working frequency band of the first antenna element is the same as or close to that of the second antenna element; the third antenna element has at least a first operating frequency band and a second operating frequency band, wherein the first operating frequency band is used for radiating signals outwards, and the second operating frequency band is used for offsetting partial or whole coupling between the first antenna element and the second antenna element. According to the scheme, the isolation among the antennas can be improved while more antennas are arranged in a limited space.
Description
Technical Field
The application belongs to the field of data transmission, and particularly relates to an antenna system and electronic equipment.
Background
In current communication devices, for example, a mobile phone, in order to ensure high-speed data transmission, the mobile phone needs to support a larger number of antennas. On the other hand, the mobile phone not only needs to support a larger number of antennas, but also needs to be more compact in structure to improve the aesthetic degree of the mobile phone, and the mobile phone is compact in structure, so that the space of the antennas is reduced, and the number of the antennas is larger, thereby causing the isolation between the antennas to be poor, and affecting the performance of the antennas.
The current solutions are the following three: (1) the antenna spacing is increased, but due to the space limitation of the mobile phone, enough space cannot be provided to increase the distance between the antennas; (2) the isolation between the two antennas is increased, and also, due to the space limitation of the mobile phone, enough space cannot be provided to increase the isolation between the antennas; (3) in this way, the decoupling network occupies the space of other antennas, so that a sufficient number of antennas cannot be arranged.
Therefore, how to arrange more antennas in a limited space and improve the isolation between the antennas is a problem to be solved at present.
Disclosure of Invention
An object of the embodiments of the present application is to provide an antenna system and an electronic device, which can improve isolation between antennas while laying out a large number of antennas in a limited space.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application discloses an antenna system, including: a substrate, a first antenna element, a second antenna element, and a third antenna element; the first antenna element, the second antenna element and the third antenna element are all arranged on the substrate, the third antenna element is positioned between the first antenna element and the second antenna element, and the working frequency band of the first antenna element is the same as or close to that of the second antenna element; the third antenna element has at least a first operating frequency band and a second operating frequency band, wherein the first operating frequency band is used for radiating signals outwards, and the second operating frequency band is used for offsetting partial or whole coupling between the first antenna element and the second antenna element.
In a second aspect, an embodiment of the present application discloses an electronic device including the antenna system described above.
The technical scheme adopted by the application can achieve the following beneficial effects:
the embodiment of the application discloses an antenna system, wherein a third antenna element is arranged between a first antenna element and a second antenna element which have the same or similar working frequency bands, the third antenna element at least has a first working frequency band and a second working frequency band, the third antenna element is used for radiating signals outwards through the first working frequency band, and is used for offsetting partial or whole coupling between the first antenna element and the second antenna element through the second working frequency band. Therefore, when a new antenna is arranged, the new antenna can counteract partial or all coupling between the first antenna element and the second antenna element, the isolation between the first antenna element and the second antenna element is improved, and further, the isolation between the antennas is improved while more antennas are arranged in a limited space, so that the structure of the electronic equipment is more compact, and the space utilization rate of the electronic equipment is improved.
Drawings
Fig. 1 is a schematic structural diagram of an antenna system disclosed in an embodiment of the present application;
fig. 2 is another schematic structural diagram of an antenna system disclosed in an embodiment of the present application;
fig. 3 is a schematic view of the isolation between the first antenna element and the second antenna element in the case where the third antenna element is not provided in the antenna system;
fig. 4 is a schematic illustration of the isolation between the first antenna element and the second antenna element in the case of the antenna system provided with a third antenna element;
fig. 5 is a schematic structural diagram of an antenna system disclosed in an embodiment of the present application;
fig. 6 is a schematic structural diagram of an antenna system disclosed in an embodiment of the present application;
fig. 7 is a schematic structural diagram of an antenna system disclosed in an embodiment of the present application;
fig. 8 is a schematic structural diagram of an antenna system disclosed in an embodiment of the present application;
fig. 9 is a schematic hardware structure diagram of an electronic device disclosed in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The antenna system and the electronic device provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Fig. 1 shows a schematic structural diagram of an antenna system disclosed in an embodiment of the present application, and as shown in fig. 1, the antenna system may include: a substrate 104, a first antenna element 101, a second antenna element 102, and a third antenna element 103.
The substrate 104 is a main return ground in the antenna system, and the substrate 104 may be a metal front shell or a steel sheet of the electronic device. The first antenna element 101, the second antenna element 102 and the third antenna element 103 are all disposed on the substrate 104, the first antenna element 101, the second antenna element 102 and the third antenna element 103 can be used for radiating energy and enhancing signals to ensure that the electronic device can transmit data at a higher rate, the third antenna element 103 is located between the first antenna element 101 and the second antenna element 102, the operating frequency band of the first antenna element 101 is the same as or close to that of the second antenna element 102, and the coupling generated between the first antenna element 101 and the second antenna element 102 can be cancelled by the third antenna element 103.
The third antenna element 103 has at least a first operating frequency band for radiating signals outwards and a second operating frequency band for cancelling part or all of the coupling between the first antenna element 101 and the second antenna element 102. That is, in the embodiment of the present application, the third antenna element 103 uses at least the first operating frequency band and the second operating frequency band simultaneously in the operating state. For example, in fig. 1, an operating path 108 corresponding to the first operating frequency band of the third antenna element 103 is used for normal operation of the third antenna element 103, and a coupling path 109 corresponding to the second operating frequency band of the third antenna element 103 is used for canceling part or all of energy coupling between the first antenna element 101 and the second antenna element 102.
In the embodiment of the present application, the operating frequency band of the first antenna element 101 is the same as or similar to the operating frequency band of the second antenna element 102, which means that the difference between the operating frequency band of the first antenna element 101 and the operating frequency band of the second antenna element 102 is less than the threshold value. Wherein the threshold value can be determined according to the actual application. For example, if the threshold is 0.2GHz, the operating frequency band of the first antenna element 101 is 2.5GHz, the operating frequency band of the second antenna element 102 is 2.4GHz, and the difference between the operating frequency bands is 0.1GHz and less than 0.2GHz, so the operating frequency band of the first antenna element 101 is close to the operating frequency band of the second antenna element 102.
In the embodiment of the present application, the relative positions of the third antenna element 103 and the first antenna element 101 and the second antenna element 102 do not need to be fixed. For example, the first antenna element 101, the second antenna element 102, and the third antenna element 103 may be disposed parallel to each other, disposed at an angle, disposed partially overlapping each other, or the like, and this embodiment of the present application does not particularly limit this as long as the third antenna element 103 is located between the first antenna element 101 and the second antenna element 102.
Alternatively, as shown in fig. 1, the third antenna element 103 may include a radiator 112 and a ground branch 106, one end of the ground branch 106 is connected to the radiator 112, and the other end is connected to the substrate 104, so that the third antenna element 103 and the substrate 104 may form a loop. Of course, as shown in fig. 1, the first antenna element 101 may also include the first radiator 110 and the first ground branch 105, and the second antenna element 102 may also include the second radiator 111 and the second ground branch 107.
In addition, in the embodiment of the present application, the processing implementation manner of each antenna element is not fixed, and may be implemented in the form of a Flexible Printed Circuit (FPC), a Laser-Direct-Structuring (LDS), a Printing-Direct-Structuring (PDS), a metal frame, a plastic die-cast metal, a plastic embedded metal sheet, and the like, which is not particularly limited in the embodiment of the present application.
The embodiment of the application discloses an antenna system, wherein a third antenna element is arranged between a first antenna element and a second antenna element which have the same or similar working frequency bands, the third antenna element at least has a first working frequency band and a second working frequency band, the third antenna element is used for radiating signals outwards through the first working frequency band, and is used for offsetting partial or whole coupling between the first antenna element and the second antenna element through the second working frequency band. Therefore, when a new antenna is arranged, partial or all coupling between the first antenna element and the second antenna element can be counteracted, the isolation between the first antenna element and the second antenna element is improved, and further, when more antennas are arranged in a limited space, the isolation between the antennas is improved, so that the structure of the electronic equipment is more compact, and the space utilization rate of the electronic equipment is improved.
Fig. 2 shows another schematic structural diagram of an antenna system provided in the embodiment of the present application, and as shown in fig. 2, the antenna system includes a first antenna element a1, a second antenna element a2, and a third antenna element A3. Wherein the substrate G0 is the main return ground for each antenna element. The first antenna element a1 and the second antenna element a2 are in the same or similar operating frequency band, and the third antenna element A3 may be a decoupled antenna.
The third antenna element A3 may include a radiator B3, a feeding structure F3, and a matching circuit M3, where the matching circuit M3 is electrically connected to a feeding position on the radiator B3, and the feeding position on the radiator B3 may be disposed near the substrate G0, or may be disposed near an end of the third antenna element A3, which is not limited in this embodiment. One end of the feeding structure F3 is connected to the matching circuit M3, and the other end is connected to the substrate G0, so that electricity can be taken through the feeding structure F3 and supplied to the third antenna element A3. The matching circuit M3 is used to adjust the input impedance of the third antenna element A3.
Of course, as shown in fig. 2, the first antenna element a1 may also include a radiator B1, a feeding structure F1 and a matching circuit M1, and the second antenna element a2 may include a radiator B2, a feeding structure F2 and a matching circuit M2.
Specifically, the matching circuit M3 may include a first filter circuit, the first filter circuit is electrically connected to the feeding structure F3, the first filter circuit includes a first inductor and a first capacitor, and the first filter circuit is configured to block a frequency band where isolation needs to be improved, that is, a frequency band between the first antenna element a1 and the third antenna element A3 and a frequency band between the second antenna element a2 and the third antenna element A3 may be blocked by the first filter circuit, so that energy generated by radiation between the first antenna element a1 and the second antenna element a2 may be blocked, energy generated by the two may be prevented from entering the third antenna element A3, and isolation between the first antenna element a1 and the second antenna element a2 may be improved.
In fig. 2, the path of the first operating band of the third antenna element a3 may be a 3/4 wavelength path from its end to ground. The path of the second operating band of the third antenna element a3 may be the 1/4 wavelength path of the radiator B3. In the present embodiment, the 1/4 wavelength path of radiator B3 of the third antenna element A3 may be used to couple the operating bands of the first antenna element a1 and the second antenna element a2 to improve the isolation of the first antenna element a1 from the second antenna element a 2.
In the case where the third antenna element A3 is not provided, since the operating frequency bands of the first antenna element a1 and the second antenna element a2 are the same or close to each other, they are coupled to each other through the C1 path in space, and the isolation between the two antennas in the operating frequency band is deteriorated.
As shown in fig. 2, in the case of providing the third antenna element A3, the third antenna element A3 has at least a first operating frequency band and a second operating frequency band, that is, the third antenna element A3 operates at least using the first operating frequency band and the second operating frequency band, the first operating frequency band is used for radiating signals outwards, the second operating frequency band is used for canceling part or all of the coupling between the first antenna element a1 and the second antenna element a2, that is, the newly added coupling paths C2 and C3 can be used for canceling part or all of the coupling between the first antenna element a1 and the second antenna element a2, so as to improve the isolation between the first antenna element a1 and the second antenna element a 2. The working path I1 may be the 1/4 wavelength path of the third antenna element A3, or may be the 3/4 wavelength path of the third antenna element A3, which is not limited in this embodiment. At the same time, the coupling path I2 will also change adaptively.
Specifically, fig. 3 shows a schematic diagram of S-parameter variation when the first antenna element a1 and the second antenna element a2 are simultaneously operated in the case where the third antenna element A3 is not provided. In fig. 3, S11 is the reflection coefficient of the first antenna element a1, S22 is the reflection coefficient of the second antenna element a2, and S21 characterizes the isolation between the first antenna element a1 and the second antenna element a 2. as shown in fig. 2, the isolation S21 between the first antenna element a1 and the second antenna element a2 increases with increasing frequency and starts to decrease with increasing frequency after reaching a peak.
Fig. 4 shows a schematic diagram of the variation of the S-parameter when the first antenna element a1 and the second antenna element a2 are simultaneously operated in the case where the third antenna element A3 is provided. In fig. 4, S33 is the reflection coefficient of the third antenna element A3, S21 represents the isolation between the first antenna element a1 and the second antenna element a2, and S32 represents the isolation between the second antenna element a2 and the third antenna element A3. As shown in fig. 4, in the case where the third antenna element A3 is provided, the isolation of the first antenna element a1 and the second antenna element a2 in the operating band is improved, and the high peak of S21 is reduced. And the isolation of the first antenna element a1, the second antenna element a2, and the third antenna element A3 is not very high. While the third antenna element a3 may also operate in the low frequency part.
In one possible implementation, as shown in fig. 5, the radiator of the third antenna element A3 may have multiple branches, in which case the third antenna element A3 may operate in multiple frequency bands, so that the antenna system can radiate energy in different frequency bands, and thus, the antenna system can receive or transmit signals in different frequency bands. Similarly, the radiators of the first and second antenna elements a1 and a2 may have a plurality of branches.
Further, as shown in fig. 2, the third antenna element a3 may further include: the ground branch G3 has one end of the ground branch G3 connected to the radiator and the other end connected to the substrate G0, and thus a loop is formed between the third antenna element A3 and the substrate G0. Of course, the first antenna element a1 and the second antenna element a2 may include a first ground branch G1 and a second ground branch G2, respectively.
Of course, as shown in fig. 6, the third antenna element A3 may not have the ground branch G3, so that the antenna body of the third antenna element A3 is in a floating state. In this possible implementation, the operating band of the third antenna element a3 (i.e. the first operating band mentioned above) may be excited by an operating path I1 of 1/4 wavelengths from the antenna feed point to the antenna end; the decoupled band, i.e. the above-mentioned second operating band, is excited by the coupling path I2 of 1/2 wavelengths of the radiator of the third antenna element a 3. The first antenna element a1 and the second antenna element a2 achieve improved isolation by canceling some or all of the coupling between the first antenna element a1 and the second antenna element a2 by coupling the coupling path I2 of the third antenna element A3, respectively. Alternatively, the operating band of the third antenna element A3 may be excited by the coupling path I2, and the first antenna element a1 and the second antenna element a2 may be coupled by the coupling path I1 to improve isolation.
In yet another possible implementation, as shown in fig. 7, the third antenna element a3 may further include: the first switch S1, the first switch S1, may be connected between the radiator and the substrate G0. The first switch S1 can switch different channel states to achieve decoupling of different frequency bands. For example, in the case where the first switch S1 is turned on, the first switch S1 serves as a ground branch G3, and thus frequency band decoupling as shown in fig. 2 can be achieved; with the first switch S1 turned off, the third antenna element A3 is suspended, and frequency band decoupling as shown in fig. 6 can be achieved.
In yet another possible implementation, as shown in fig. 8, the third antenna element a3 may further include: the second filter circuit M4, the second filter circuit M4 and the ground branch G3 (not shown in fig. 8) are connected in series between the radiator and the substrate G0, and the frequency band of the third antenna element A3 can be adjusted through the second filter circuit M4.
In particular, the second filter circuit M4 includes a capacitor and/or an inductor. In the case that the second filter circuit M4 is a single capacitor or inductor, the coupling frequency band can be adjusted by using the characteristics of the capacitor or inductor; when the second filter circuit M4 is a combined circuit of a capacitor and an inductor, it is possible to achieve decoupling in multiple frequency bands by using the characteristic that the second filter circuit is equivalent to a capacitor or an inductor of different sizes in different frequency bands.
Further, the third antenna element a3 may further include: a second switch; the second switch, the second filter circuit M4 and the ground branch G3 are connected in series between the radiator and the substrate G0, in which case the second switch is a selection switch, and the antenna system can be controlled to implement different embodiments. The embodiment shown in fig. 2 can be realized in case the second switch is in communication with the ground branch G3, and the embodiment shown in fig. 8 can be realized in case the second switch is in communication with the second filter circuit M4.
Based on the antenna system described above, an embodiment of the present application discloses an electronic device including the antenna system described above. The electronic devices may be a tablet, a notebook, a mobile phone, a watch, and the like, and the embodiments of the present application do not specifically limit the electronic devices.
Fig. 9 shows a schematic diagram of a hardware structure of an electronic device 900 provided in an embodiment of the present application, where the electronic device 900 includes, but is not limited to: a radio frequency unit 901 (e.g., the antenna system described in the above embodiments), a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, and a processor 910.
Those skilled in the art will appreciate that the electronic device 900 may further include a power source (e.g., a battery) for supplying power to various components, and the power source may be logically connected to the processor 910 through a power management system, so as to manage charging, discharging, and power consumption management functions through the power management system. The electronic device structure shown in fig. 9 does not constitute a limitation of the electronic device, and the electronic device may include more or less components than those shown, or combine some components, or arrange different components, and thus, the description is not repeated here.
It should be understood that, in the embodiment of the present application, the input Unit 904 may include a Graphics Processing Unit (GPU) 9041 and a microphone 9042, and the Graphics Processing Unit 9041 processes image data of a still picture or a video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 906 may include a display panel 9061, and the display panel 9061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 907 includes a touch panel 9071 and other input devices 9072. A touch panel 9071 also referred to as a touch screen. The touch panel 9071 may include two parts, a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.
In this embodiment of the application, the radio frequency unit 901 receives downlink data from a network side device and then processes the downlink data to the processor 910; in addition, the uplink data is sent to the network side equipment. Generally, the radio frequency unit 901 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An antenna system, comprising: a substrate, a first antenna element, a second antenna element, and a third antenna element; wherein,
the first antenna element, the second antenna element and the third antenna element are all arranged on the substrate, the third antenna element is positioned between the first antenna element and the second antenna element, and the working frequency band of the first antenna element is the same as or close to that of the second antenna element;
the third antenna element has at least a first operating frequency band and a second operating frequency band, wherein the first operating frequency band is used for radiating signals outwards, and the second operating frequency band is used for offsetting partial or whole coupling between the first antenna element and the second antenna element.
2. The antenna system of claim 1, wherein the third antenna element comprises: the antenna comprises a radiating body, a feed structure and a matching circuit, wherein the matching circuit is connected with a feed position on the radiating body, one end of the feed structure is connected with the matching circuit, and the other end of the feed structure is connected with the substrate.
3. The antenna system of claim 2, wherein the matching circuit comprises a first filtering circuit.
4. The antenna system of claim 2, wherein the radiator of the third antenna element has a plurality of branches.
5. The antenna system of any of claims 2 to 4, wherein the third antenna element further comprises: and one end of the grounding branch is connected with the radiator, and the other end of the grounding branch is connected with the substrate.
6. The antenna system of claim 5, wherein the third antenna element further comprises: and the first switch is connected between the grounding branch and the substrate.
7. The antenna system of claim 5, wherein the third antenna element further comprises: and the second filter circuit and the grounding branch are connected in series between the radiator and the substrate.
8. The antenna system of claim 7, wherein the second filtering circuit comprises a capacitor and/or an inductor.
9. The antenna system of claim 7, wherein the third antenna element further comprises: and the second switch, the second filter circuit and the grounding branch are connected in series between the radiator and the substrate.
10. An electronic device, characterized in that it comprises an antenna system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011387229.7A CN112531343B (en) | 2020-12-01 | 2020-12-01 | Antenna system and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011387229.7A CN112531343B (en) | 2020-12-01 | 2020-12-01 | Antenna system and electronic device |
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| CN112531343A true CN112531343A (en) | 2021-03-19 |
| CN112531343B CN112531343B (en) | 2023-12-05 |
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| CN113644436A (en) * | 2021-08-18 | 2021-11-12 | 维沃移动通信有限公司 | Antenna system and electronic equipment |
| CN113764888A (en) * | 2021-08-09 | 2021-12-07 | 荣耀终端有限公司 | Antenna combination system and terminal equipment |
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| WO2023015979A1 (en) * | 2021-08-09 | 2023-02-16 | 荣耀终端有限公司 | Antenna combination system and terminal device |
| CN113644436A (en) * | 2021-08-18 | 2021-11-12 | 维沃移动通信有限公司 | Antenna system and electronic equipment |
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