CN108306117B - Antenna system and terminal - Google Patents
Antenna system and terminal Download PDFInfo
- Publication number
- CN108306117B CN108306117B CN201711486978.3A CN201711486978A CN108306117B CN 108306117 B CN108306117 B CN 108306117B CN 201711486978 A CN201711486978 A CN 201711486978A CN 108306117 B CN108306117 B CN 108306117B
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- Prior art keywords
- antenna system
- metal frame
- radiator
- antenna
- electrical component
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-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2258—Supports; Mounting means by structural association with other equipment or articles used with computer equipment
- H01Q1/2266—Supports; Mounting means by structural association with other equipment or articles used with computer equipment disposed inside the computer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
- H01Q1/244—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas extendable from a housing along a given path
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Support Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The embodiment of the invention relates to the field of communication, and discloses an antenna system and a terminal. In the present invention, an antenna system includes: the antenna comprises a first radiator, a second radiator, a feed point, a first metal frame and a second metal frame; the first metal frame and the second metal frame are obtained by dividing the whole metal frame of the terminal middle frame by a first broken joint and a second broken joint which are positioned on a first short edge of the terminal middle frame, and the first metal frame is electrically connected with the first radiator and the second radiator; wherein the feed point is located to the right of the feed point. The antenna system can keep better performance while tuning the frequency band of the antenna under the condition of few antenna clearance areas of the terminal, and has wider high-frequency bandwidth so as to meet the use requirement of multi-carrier aggregation.
Description
Technical Field
The embodiment of the invention relates to the field of communication, in particular to an antenna system and a terminal.
Background
With the continuous development of technology, wireless communication technology is continuously advancing. Wireless communication technology has been applied to various fields such as mobile phones, notebook computers, and the like. For aesthetic reasons, most of the fields place the antenna in the housing of the electronic device, i.e. use a hidden antenna. However, when the antenna is in close proximity to other electronic devices, the performance of the antenna may be affected by electromagnetic radiation generated by the operation of the other electronic devices. A certain space needs to be left in the housing for arranging the antenna.
However, the inventors found that at least the following problems exist in the prior art: with the light, thin and diversified requirements of people on electronic products, the space for accommodating the antenna is smaller and smaller. In order to improve the aesthetic feeling of the whole electronic device, designers of electronic devices are beginning to research the electronic appearance design of a near-full screen. So full screen will be a mainstream direction for electronic device design in the coming years. However, as the screen occupancy of the screen becomes higher and higher, the environment of the antenna becomes worse and worse. The radiation performance and bandwidth of the antenna are limited by the physical characteristics of the antenna, and how to implement multi-band switching in such an environment and the antenna has a better performance level is a great challenge for designers.
Disclosure of Invention
An object of the embodiments of the present invention is to provide an antenna system and a terminal, which can tune the bandwidth of an antenna and have a wider high-frequency bandwidth even when the antenna clearance area of the terminal is small.
To solve the above technical problem, an embodiment of the present invention provides an antenna system, including: the antenna comprises a first radiator, a second radiator, a feed point, a first metal frame and a second metal frame; the first metal frame and the second metal frame are obtained by dividing the whole metal frame of the terminal middle frame by a first broken joint and a second broken joint which are positioned on a first short edge of the terminal middle frame, and the first metal frame is electrically connected with the first radiator and the second radiator; wherein the feed point is positioned at the right side of the feed point;
the first radiator includes: the first radiation part covers the feed point and is parallel to the first short edge, the second radiation part extends from the first radiation part towards the direction close to the first short edge and is parallel to the first long edge, the third radiation part extends from the second radiation part towards the direction far away from the first long edge and is parallel to the first short edge, and the fourth radiation part extends from the third radiation part towards the direction close to the circuit board in a bending way; the first radiator is electrically connected with the circuit board through the feed point and the feed point;
the second radiator includes: the second radiator is connected with the state change switch on the circuit board through the connection point;
the first metal frame is electrically connected with the fourth radiation part of the first radiation body through a first elastic sheet, and the first metal frame is electrically connected with the sixth radiation part of the second radiation body through a second elastic sheet; the second metal frame is electrically connected with the circuit board through a third elastic sheet.
Embodiments of the present invention also provide a terminal including the antenna system as mentioned in the above embodiments.
Compared with the prior art, the embodiment of the invention has the advantages that the first radiator and the second radiator are matched with the first metal frame and the second metal frame of the terminal middle frame, so that the medium-frequency band and the high-frequency band of the antenna system can be integrated into a wider frequency band by the antenna system, and the working frequency band of the antenna system covers the 1710-2700MHz frequency band. By changing the state change-over switch on the circuit board, the low-frequency working frequency band of the antenna system can be tuned, and the high-frequency band can be completely covered in each state.
In addition, the state conversion switch at least comprises 5 states;
when the state change-over switch is switched to a first working state, the working frequency range of the antenna system covers 880MHz-960MHz, 1710MHz-2200MHz and 2300MHz-2700 MHz;
when the state change-over switch is switched to a second working state, the working frequency range of the antenna system covers 791MHz-862MHz, 824MHz-894MHz, 1710MHz-2200MHz and 2300MHz-2700 MHz;
when the state change-over switch is switched to a third working state, the working frequency range of the antenna system covers 703MHz-803MHz, 1710MHz-2200MHz and 2300MHz-2700 MHz;
when the state change-over switch is switched to a fourth working state, the working frequency range of the antenna system covers 663MHz-698MHz, 1710MHz-2200MHz and 2300MHz-2700 MHz;
when the state change-over switch is switched to the fifth working state, the working frequency range of the antenna system covers 617MHz-652MHz, 824MHz-894MHz, 1710MHz-2200MHz and 2300MHz-2700 MHz.
The low-frequency switching of the antenna system has at least 5 working states, and the impedance of the antenna system is changed through the state change switch, so that the multiband frequency extension is realized, and all low-frequency bands of LTE (Long Term Evolution) are covered by the multiband frequency extension.
In addition, the third elastic sheet is connected with the grounding end of the circuit board through the first electrical assembly.
In addition, the antenna system further includes: a second electrical component and a third electrical component;
one end of the second electrical component is connected with the connecting end of the radio frequency conversion circuit, and the other end of the second electrical component is grounded;
one end of the third electrical component is connected with the connecting end of the radio frequency conversion circuit, and the other end of the third electrical component is connected with the feed point.
In addition, the second electrical component is a capacitor, and the third electrical component is an inductor.
In addition, the antenna system further includes: an antenna mount; the first radiating body and the second radiating body are laser-etched on the antenna support.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural view of an antenna system according to a first embodiment of the present invention;
fig. 2 is a partial size diagram of a first radiator and a second radiator according to a first embodiment of the present invention;
fig. 3 is a circuit diagram of a matching circuit of the first embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a connection relationship between the entire metal frame and the circuit board of the terminal of the antenna system according to the second embodiment of the present invention;
fig. 5 is a schematic view of the connection relationship between the antenna holder and the circuit board according to the second embodiment of the present invention;
fig. 6 is an efficiency diagram of an antenna system according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present invention in its various embodiments. However, the technical solution claimed in the present invention can be implemented without these technical details and various changes and modifications based on the following embodiments.
A first embodiment of the invention relates to an antenna system, as shown in fig. 1. The antenna system includes: the first radiator 11, the second radiator 12, the feeding point 131, the feeding point 132, the first metal frame 141, and the second metal frame 142; the first metal frame 141 and the second metal frame 142 are obtained by dividing the whole metal frame of the terminal middle frame by the first broken seam and the second broken seam located on the first short edge 14 of the terminal middle frame, and the first metal frame 141 is electrically connected with the first radiator 11 and the second radiator 12; wherein the feeding point 132 is located to the right of the feeding point 131.
It should be noted that the left and right directions in this embodiment are described as the left and right sides in a situation where the terminal is vertically placed and the face of the person is facing the screen.
The first radiator 11 includes: a first radiation part 111 covering the feed point 132 and being parallel to the first short side 14 of the terminal middle frame, a second radiation part 112 extending from the first radiation part 111 towards the direction close to the first short side 14 of the terminal middle frame and being parallel to the first long side (not shown in the figure) of the terminal middle frame, a third radiation part 113 extending from the second radiation part 112 towards the first long side far away from the terminal middle frame and being parallel to the first short side 14 of the terminal middle frame, and a fourth radiation part 114 extending from the third radiation part towards the direction 113 close to the circuit board 16; wherein the third radiating portion 113 covers the feeding point 131, and the first radiating body 11 is electrically connected to the circuit board 16 through the feeding point 131 and the feeding point 132.
The second radiator 12 includes: a fifth radiation part 121 covering the connection point 133, and a sixth radiation part 122 bent and extended from the fifth radiation part 121 toward the direction close to the circuit board 16, wherein the connection point 133 is located at the left side of the feeding point 131.
Note that the point 134 in the drawing is a spare point for adjusting the performance setting of the first radiator 11, and is not an essential feature of the present embodiment.
In one embodiment, the dimensions of the first radiator and the second radiator are shown in fig. 2.
Wherein the antenna system further comprises an antenna mount 19; the first radiator 11 and the second radiator 12 are laser-engraved on the antenna mount 19.
It should be noted that, as can be understood by those skilled in the art, in practical applications, the first radiator 11 and the second radiator 12 may also be disposed inside the terminal in other manners, and the present embodiment does not limit the arrangement manner of the first radiator 11 and the second radiator 12.
Wherein the antenna system further comprises a matching circuit comprising therein a second electrical component 192 and a third electrical component 193; one end of the second electrical component 192 is connected to the connection end of the rf conversion circuit 21, and the other end is grounded; the third electrical component 193 has one end connected to the connection end of the rf conversion circuit 21 and the other end connected to the feeding point. In one embodiment, the matching circuit is shown in fig. 3, the second electrical component 192 is a capacitor and the third electrical component 193 is an inductor. By adjusting the matching circuit, the efficiency of the antenna system can be improved as much as possible.
The above description is only for illustrative purposes and does not limit the technical aspects of the present invention.
Compared with the prior art, the antenna system in the embodiment enables the medium-frequency band and the high-frequency band of the antenna system to be integrated into a wider frequency band through the matching of the first radiator and the second radiator with the first metal frame and the second metal frame of the terminal middle frame, so that the working frequency band of the antenna system covers the 1710MHz-2700MHz frequency band. By changing the state change-over switch on the circuit board, the low-frequency working frequency band of the antenna system can be tuned, and each state is ensured to completely cover the high-frequency band.
A second embodiment of the present invention relates to an antenna system, and the second embodiment is to describe in detail a connection relationship between a whole metal frame of a terminal and a circuit board, a connection relationship between an antenna bracket and the circuit board, and an operating state of a state switch on the basis of the first embodiment.
In the second embodiment, the connection relationship between the entire metal frame of the terminal and the circuit board 16 is shown in fig. 4. The first metal frame 141 is electrically connected to the fourth radiation portion 114 of the first radiator 11 through the first elastic sheet 171, and is electrically connected to the sixth radiation portion 122 of the second radiator 12 through the second elastic sheet 172. Since the first metal frame 141 is electrically connected to the first radiator 11 and the second radiator 12, the current of the first radiator 11 and the second radiator 12 can be transmitted to the first metal frame 141. The first metal frame 141 generates current therein and radiates electromagnetic waves outward.
The second metal frame 142 is provided with an inward horizontal protrusion, and the protrusion is electrically connected to the circuit board 16 through the third elastic sheet 173.
It should be noted that the third elastic sheet 173 is electrically connected to the ground terminal of the circuit board 16, and a first electrical component (not shown) or a circuit may be disposed between the third elastic sheet 173 and the circuit board 16 for improving the performance of the second metal frame 142.
As shown in fig. 5, the antenna support 19 is connected to the circuit board 16, and the back surface of the antenna support is provided with elastic pieces corresponding to the feeding point 131, the feeding point 132 and the connection point 133. The connection between the first radiator 11 and the circuit board 16 is realized by the feed point 131 and the feed point 132. The connection of the second radiator 12 to the state change switch on the circuit board 16 is realized through a connection point 133. The state change-over switch on the circuit board 16 includes at least 5 states, and when the state change-over switch is in different states, the antenna system is in different working states.
In one embodiment, the state switch is an RFMD QM13114 switch, and the switch makes the impedance of the antenna change differently through different parallel states of 4 branches, so as to implement conversion between 8 states, and 5 states are used in this embodiment. When the state change-over switch is switched to the first working state, the working frequency band of the antenna system covers 880MHz-960MHz, 1710MHz-2200MHz and 2300MHz-2700 MHz. When the state change-over switch is switched to a second working state, the working frequency range of the antenna system covers 791MHz-862MHz, 824MHz-894MHz, 1710MHz-2200MHz and 2300MHz-2700 MHz; when the state change-over switch is switched to a third working state, the working frequency range of the antenna system covers 703MHz-803MHz, 1710MHz-2200MHz and 2300MHz-2700 MHz. When the state change-over switch is switched to a fourth working state, the working frequency range of the antenna system covers 663MHz-698MHz, 1710MHz-2200MHz and 2300MHz-2700 MHz. When the state change-over switch is switched to the fifth working state, the working frequency range of the antenna system covers 617MHz-652MHz, 824MHz-894MHz, 1710MHz-2200MHz and 2300MHz-2700 MHz.
The efficiency diagram of the antenna system is shown in fig. 6. Wherein curve 1 represents the first operating state, curve 2 represents the second operating state, curve 3 represents the third operating state, curve 4 represents the fourth operating state, and fig. 5 represents the fifth operating state. As can be seen from fig. 6, in the five states, the efficiency in the frequency band of 1710MHz to 2700MHz is mostly higher than 30%, which indicates that the antenna system can implement multi-carrier aggregation of all high frequencies. In addition, the five states of the antenna system respectively cover 617-652 MHz frequency band, 663MHz-698MHz frequency band, 703MHz-803MHz frequency band, 824MHz-894MHz frequency band and 880MHz-960MHz frequency band, which shows that the antenna system can realize the switching from 900MHz frequency band to 600MHz frequency band, and can be used in the whole LTE low frequency system.
The antenna system has at least 5 working states, and the impedance of the antenna system is changed through the state conversion switch, so that the switching among a plurality of frequency bands is realized, and the bandwidth of each frequency band is very wide.
The above description is only for illustrative purposes and does not limit the technical aspects of the present invention.
Compared with the prior art, the antenna system provided in the embodiment enables the use of high-frequency multi-carrier aggregation to be considered when the antenna system switches each working state by matching the first radiator and the second radiator with the first metal frame and the second metal frame of the terminal middle frame, so that the working frequency band of the antenna system covers the 1710-2700MHz frequency band. By changing the state change-over switch on the circuit board, the low-frequency working frequency band of the antenna system and the impedance modulation of the whole antenna system can be tuned.
A third embodiment of the present invention provides a terminal including the antenna system provided in the first or second embodiment. The terminal is particularly suitable for electronic devices with full-screen.
Of course, the terminal should also include hardware such as a processor, memory, etc., where the memory and processor are connected by a bus, which may include any number of interconnected buses and bridges that link various circuits of the memory and processor together. The bus may also link various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface between the bus and the antenna system. The data processed by the processor is transmitted over the wireless medium through the antenna system, which further receives the data and transmits the data to the processor. The processor is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory may be used to store data used by the processor in performing operations.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (7)
1. An antenna system, comprising: the antenna comprises a first radiator, a second radiator, a feed point, a first metal frame and a second metal frame; the first metal frame and the second metal frame are obtained by dividing the whole metal frame of the terminal middle frame by a first broken joint and a second broken joint which are positioned on a first short edge of the terminal middle frame, and the first metal frame is electrically connected with the first radiator and the second radiator; wherein the feed point is located to the right of the feed point;
the first radiator includes: the first radiation part covers the feed place and is parallel to the first short side, the second radiation part extends from the first radiation part towards the direction close to the first short side and is parallel to the first long side, the third radiation part extends from the second radiation part towards the direction far away from the first long side and is parallel to the first short side, and the fourth radiation part extends from the third radiation part towards the direction close to the circuit board in a bending mode; the third radiating part covers the feeding point, and the first radiating body is electrically connected with the circuit board through the feeding point and the feeding point;
the second radiator includes: the second radiator is connected with the state change switch on the circuit board through the connection point;
the first metal frame is electrically connected with the fourth radiation part of the first radiation body through a first elastic sheet, and the first metal frame is electrically connected with the sixth radiation part of the second radiation body through a second elastic sheet; the second metal frame is electrically connected with the circuit board through a third elastic sheet.
2. The antenna system of claim 1, wherein the state change switch comprises at least 5 states;
when the state change-over switch is switched to a first working state, the working frequency range of the antenna system covers 880MHz-960MHz, 1710MHz-2200MHz and 2300MHz-2700 MHz;
when the state change-over switch is switched to a second working state, the working frequency range of the antenna system covers 791MHz-862MHz, 824MHz-894MHz, 1710MHz-2200MHz and 2300MHz-2700 MHz;
when the state change-over switch is switched to a third working state, the working frequency range of the antenna system covers 703MHz-803MHz, 1710MHz-2200MHz and 2300MHz-2700 MHz;
when the state change-over switch is switched to a fourth working state, the working frequency range of the antenna system covers 663MHz-698MHz, 1710MHz-2200MHz and 2300MHz-2700 MHz;
when the state change-over switch is switched to a fifth working state, the working frequency range of the antenna system covers 617MHz-652MHz, 824MHz-894MHz, 1710MHz-2200MHz and 2300MHz-2700 MHz.
3. The antenna system of claim 1, wherein the third spring plate is connected to a ground terminal of the circuit board via a first electrical component.
4. The antenna system of claim 1, further comprising: a second electrical component and a third electrical component;
one end of the second electrical component is connected with the connecting end of the radio frequency conversion circuit, and the other end of the second electrical component is grounded;
one end of the third electrical component is connected with the connecting end of the radio frequency conversion circuit, and the other end of the third electrical component is connected with the feed point.
5. The antenna system of claim 4, wherein the second electrical component is a capacitor and the third electrical component is an inductor.
6. The antenna system of claim 1, further comprising: an antenna mount;
the first radiating body and the second radiating body are laser engraved on the antenna bracket.
7. A terminal, characterized in that it comprises an antenna system according to any of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711486978.3A CN108306117B (en) | 2017-12-29 | 2017-12-29 | Antenna system and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711486978.3A CN108306117B (en) | 2017-12-29 | 2017-12-29 | Antenna system and terminal |
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| CN108306117A CN108306117A (en) | 2018-07-20 |
| CN108306117B true CN108306117B (en) | 2020-11-17 |
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| CN201711486978.3A Expired - Fee Related CN108306117B (en) | 2017-12-29 | 2017-12-29 | Antenna system and terminal |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713461A (en) * | 2018-12-30 | 2019-05-03 | 瑞声精密制造科技(常州)有限公司 | A kind of separate antennas system |
| CN112768904B (en) * | 2019-11-05 | 2022-08-05 | RealMe重庆移动通信有限公司 | Antenna radiator, antenna assembly and electronic equipment |
| CN112563740B (en) * | 2020-12-02 | 2022-08-09 | 捷开通讯(深圳)有限公司 | Antenna structure and electronic equipment |
| CN113644427A (en) * | 2021-08-03 | 2021-11-12 | 深圳市华信微通信技术有限公司 | Ultra-wideband 5G combined antenna for mobile phone |
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| US9203140B2 (en) * | 2012-08-30 | 2015-12-01 | Sony Corporation | Multi-band frame antenna |
| US9711841B2 (en) * | 2013-09-20 | 2017-07-18 | Sony Corporation | Apparatus for tuning multi-band frame antenna |
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| CN107275753B (en) * | 2016-04-08 | 2020-06-19 | 北京小米移动软件有限公司 | Antenna of terminal |
| CN106898859A (en) * | 2017-01-19 | 2017-06-27 | 瑞声科技(新加坡)有限公司 | Antenna and mobile terminal |
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- 2017-12-29 CN CN201711486978.3A patent/CN108306117B/en not_active Expired - Fee Related
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| US7009564B2 (en) * | 2003-09-19 | 2006-03-07 | The United States Of America As Represented By The Secretary Of The Navy | TM microstrip antenna |
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| CN108306117A (en) | 2018-07-20 |
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