CN109818134B - Terminal with metal frame antenna - Google Patents
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- CN109818134B CN109818134B CN201910205346.8A CN201910205346A CN109818134B CN 109818134 B CN109818134 B CN 109818134B CN 201910205346 A CN201910205346 A CN 201910205346A CN 109818134 B CN109818134 B CN 109818134B
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Abstract
The application provides a terminal with a metal frame antenna, which comprises a dielectric substrate, a metal floor and a metal frame; the edge of the metal floor is provided with a first gap, a second gap, a third gap and a fourth gap which are not communicated with each other; a first breakpoint, a second breakpoint, a third breakpoint and a fourth breakpoint are correspondingly arranged at one end of the metal frame connected with the first gap, the second gap, the third gap and the fourth gap; and the second surface of the dielectric substrate is respectively provided with a first matching network, a second matching network, a third matching network and a fourth matching network, and the first matching network, the second matching network, the third matching network and the fourth matching network are respectively connected with one end of the first gap, one end of the second gap, one end of the third gap and one end of the fourth gap in a one-to-one corresponding feeding manner. The terminal provided by the application reduces the size of the clearance space required by the antenna in the mobile terminals such as mobile phones, and meets the development requirements under the trend that the clearance areas of the mobile terminals such as mobile phones are narrower and narrower.
Description
Technical Field
The application relates to the technical field of communication equipment, in particular to a terminal with a metal frame antenna.
Background
With the development of intelligent terminal technology, mobile terminals such as mobile phones and the like have more and more information transfer functions, and one-to-many link scenes of a single communication terminal are quite common, such as mobile phones and a plurality of base stations, positioning equipment and a plurality of satellites, routing equipment and a plurality of data terminals and the like. Therefore, in order to adapt to the usage scenarios of the mobile terminals such as mobile phones, the performance requirements of the mobile terminals such as mobile phones on the antennas thereof are increasing.
In recent years, mobile terminals such as full-screen mobile phones are more and more sought after by users because the ultra-high screen occupation ratio brings better visual experience to the users. With the development of the full-screen of mobile terminals such as mobile phones, the larger screen occupation ratio, the thinner terminal thickness and the narrower screen margin make the space reserved for the terminal antenna smaller and smaller, and the space reserved for the terminal antenna is usually smaller than 2 mm. However, the requirement of the antenna structure of the mobile terminal such as the mobile phone on the width of the clearance area is usually greater than 3mm at present, when the antenna structure of this type is applied to the mobile terminal such as the mobile phone with a relatively small clearance area, the occupied area of the terminal antenna is reduced (the occupied space of the antenna of the mobile terminal such as the mobile phone is reduced), the Q value of the antenna is increased, so that the bandwidth of the mobile terminal antenna such as the mobile phone is narrowed, and the efficiency is also deteriorated, especially at a low frequency band.
Therefore, in order to meet the development requirement of the full-screen of the mobile terminal such as a mobile phone, how to provide the mobile terminal such as a mobile phone with an antenna structure more suitable for the narrow headroom environment is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The application provides a terminal with metal frame antenna, reduces the required headroom size of antenna in mobile terminals such as cell-phone, adapts to the development demand under the increasingly narrow and small trend in mobile terminals's such as cell-phone headroom district.
The application provides a terminal with a metal frame antenna, which comprises a dielectric substrate, wherein a metal floor is arranged on a first surface of the dielectric substrate; the metal frame surrounds the periphery of the medium substrate;
the edge of the metal floor is provided with a first gap, a second gap, a third gap and a fourth gap which are not communicated with each other, and one sides of the first gap, the second gap, the third gap and the fourth gap, which are far away from the metal floor, are connected with the metal frame;
a first breakpoint, a second breakpoint, a third breakpoint and a fourth breakpoint are correspondingly arranged at one end of the metal frame connected with the first gap, the second gap, the third gap and the fourth gap;
and the second surface of the dielectric substrate is respectively provided with a first matching network, a second matching network, a third matching network and a fourth matching network, and the first matching network, the second matching network, the third matching network and the fourth matching network are respectively connected with one end of the first gap, one end of the second gap, one end of the third gap and one end of the fourth gap in a one-to-one corresponding feeding manner.
The application provides a terminal with metal frame antenna in the terminal, metal bottom plate and metal frame department of meeting set up first gap, second gap, third gap and fourth gap independent each other on the dielectric substrate, correspond at the one end of the metal frame that meets with first gap, second gap, third gap and fourth gap and set up first breakpoint, second breakpoint, third breakpoint and fourth breakpoint, feed first gap, second gap, third gap and fourth gap through corresponding first matching network, second matching network, third matching network and fourth matching network respectively, form the 4X 4MIMO antenna based on terminal metal frame. The terminal with the metal frame antenna provided by the application utilizes the gap between the metal floor and the metal frame, the breakpoint on the metal frame and the metal frame to construct the antenna of the terminal, wherein the gap is used for providing a clearance area. In specific use, the widths of the first gap, the second gap, the third gap and the fourth gap can be generally less than 2mm, so that the size of an area needing clearance from an antenna in the terminal is correspondingly reduced, and the development trend of a narrow clearance environment of the terminal is facilitated to adapt.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic structural diagram of a terminal having a metal frame antenna according to an embodiment of the present disclosure;
fig. 2 is a front view of a terminal with a metal frame antenna according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a first antenna according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a second antenna according to an embodiment of the present application;
fig. 5 is a schematic diagram of simulation results of a first antenna and a second antenna in a terminal according to an embodiment of the present application;
fig. 6 is a schematic diagram illustrating efficiencies of a first antenna and a second antenna in a terminal according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of another terminal with a metal frame antenna according to an embodiment of the present application.
Wherein:
1-dielectric substrate, 2-metal floor, 3-metal frame, 4-first gap, 5-second gap, 6-third gap, 7-fourth gap, 8-first breakpoint, 9-second breakpoint, 10-third breakpoint, 11-fourth breakpoint, 12-first matching network, 121-first feeding branch, 122-first inductor, 123-first capacitor, 124-second capacitor, 13-second matching network, 131-first matching circuit, 132-second matching circuit, 133-first switch, 134-second switch, 135-third switch, 136-first cross-over capacitor, 14-third matching network, 15-fourth matching network.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The terminal with the metal frame antenna provided by the embodiment of the application comprises a mobile phone, a PC (personal computer) and the like, wherein the terminal is provided with a metal frame 3. For convenience of description, the following description will be made in detail by taking a mobile phone as an example.
Fig. 1 is a schematic structural diagram of a terminal with a metal frame antenna according to an embodiment of the present application, and fig. 2 is a front view of the terminal with the metal frame antenna according to the embodiment of the present application. As shown in fig. 1 and 2, the terminal with a metal frame antenna provided in the embodiment of the present application includes a dielectric substrate 1 and a metal frame 3, wherein a metal floor 2 is disposed on a first surface of the dielectric substrate 1, and the metal frame 3 surrounds the dielectric substrate 1; the edge of the metal floor 2 is provided with a first gap 4, a second gap 5, a third gap 6 and a fourth gap 7 which are not communicated with each other, and one sides of the first gap 4, the second gap 5, the third gap 6 and the fourth gap 7, which are far away from the metal floor 2, are connected with the metal frame 3; a first breakpoint 8, a second breakpoint 9, a third breakpoint 10 and a fourth breakpoint 11 are correspondingly arranged at one end of the metal frame 3 connected with the first gap 4, the second gap 5, the third gap 6 and the fourth gap 7; the second surface of the dielectric substrate 1 is respectively provided with a first matching network 12, a second matching network 13, a third matching network 14 and a fourth matching network 15, and the first matching network 12, the second matching network 13, the third matching network 14 and the fourth matching network 15 are respectively in one-to-one corresponding feed connection with one end of the first slot 4, the second slot 5, the third slot 6 and the fourth slot 7.
In the embodiment of the present application, the dielectric substrate 1 may be a printed circuit board of a mobile phone. In general, the back surface of the dielectric substrate 1 is referred to as the first surface of the dielectric substrate 1, and the front surface of the dielectric substrate 1 is referred to as the second surface of the dielectric substrate 1, but the present invention is not limited thereto. The metal floor 2 may be a reference ground printed to the first side of the dielectric substrate 1, and the edge of the metal floor 2 is connected to the metal frame 3.
The first gap 4, the second gap 5, the third gap 6 and the fourth gap 7 are arranged at the edge of the metal floor 2, and the first gap 4, the second gap 5, the third gap 6 and the fourth gap 7 are independent and not communicated with each other. In the embodiment of the present application, the first slit 4, the second slit 5, the third slit 6, and the fourth slit 7 are all rectangular narrow slits, one side of the first slit 4, the second slit 5, one side of the third slit 6, and one side of the fourth slit 7 in the length extending direction are connected to the metal frame 3, that is, one side of the first slit 4, one side of the second slit 5, one side of the third slit 6, and one side of the fourth slit 7 away from the metal floor 2 are connected to the metal frame 3, and the first slit 4, the second slit 5, the third slit 6, and the fourth slit 7 are distributed along the edge of the metal frame 3. Specifically, the positions of the first slit 4, the second slit 5, the third slit 6, and the fourth slit 7 may be selected according to the actual length and the size of the terminal metal floor 2, that is, the first slit 4, the second slit 5, the third slit 6, or the fourth slit 7 may be disposed on the long side or the short side of the terminal, which is not specifically limited in the present application, and may be selected according to the actual needs thereof.
Correspondingly set up first breakpoint 8, second breakpoint 9, third breakpoint 10 and fourth breakpoint 11 on metal frame 3, first breakpoint 8, second breakpoint 9, third breakpoint 10 and fourth breakpoint 11 set up the one end at metal frame 3 that meets with first gap 4, second gap 5, third gap 6 and fourth gap 7 respectively corresponding. That is, the first break point 8 is disposed at one end of the first gap 4 connected to the metal frame 3, the second break point 9 is disposed at one end of the second gap 5 connected to the metal frame 3, the third break point 10 is disposed at one end of the third gap 6 connected to the metal frame 3, and the fourth break point 11 is disposed at one end of the fourth gap 7 connected to the metal frame 3. Because the first slit 4 is a rectangular narrow slit, two ends exist in the extending direction of the length of the metal frame 3 connected with the first slit, and the setting position of the first break point 8 can be arbitrarily selected from the two ends, and can be specifically selected according to the actual needs of the metal frame, which is not specifically limited in the application.
The first matching network 12 feeds the first slot 4, the second matching network 13 feeds the second slot 5, the third matching network 14 feeds the third slot 6, and the fourth matching network 15 feeds the fourth slot 7, wherein the feeds include direct feeds and coupled feeds. Specifically, the first matching network 12, the second matching network 13, the third matching network 14, and the fourth matching network 15 are connected to the first slot 4, the second slot 5, the third slot 6, and the fourth slot 7 by microstrip feed line feeding. The first matching network 12, the second matching network 13, the third matching network 14 and the fourth matching network 15 are respectively composed of a capacitor, an inductor and a microstrip feeder, can be designed into an L-type, pi-type or other resonant matching network structure, and can be formed by one or more capacitors or inductors or a combination of capacitors and inductors, and used for tuning the self-impedance of the antenna, so that the antenna can self-resonate in a required working frequency band. Specifically, the first matching network 12 is in feed connection with the first slot 4, and the metal frame 3 connected with the first slot 4 and the first slot 4 forms a first antenna; the second matching network 13 is in feed connection with the second slot 5, and the metal frame 3 connected with the second slot 5 and the second slot 5 forms a second antenna; the third matching network 14 is in feed connection with the third slot 6, and the metal frame 3 connected with the third slot 6 and the third slot 6 forms a third antenna; the fourth matching network 15 is in feed connection with the fourth slot 7, and the metal frame 3 connected with the fourth slot 7 and the fourth slot 7 forms a fourth antenna; thereby forming a 4 × 4MIMO antenna. The first matching network 12, the second matching network 13, the third matching network 14 and the fourth matching network 15 are used for tuning the resonance frequency point and the bandwidth of the corresponding antenna.
The terminal with the metal frame antenna provided in the embodiment of the present application, a first gap 4, a second gap 5, a third gap 6, and a fourth gap 7 that are independent from each other are provided at a joint of a metal base plate and a metal frame 3 on a dielectric substrate 1, a first breakpoint 8, a second breakpoint 9, a third breakpoint 10, and a fourth breakpoint 11 are correspondingly provided at one end of the metal frame 3 connected to the first gap 4, the second gap 5, the third gap 6, and the fourth gap 7, and the first gap 4, the second gap 5, the third gap 6, and the fourth gap 7 are fed through a corresponding first matching network 12, a second matching network 13, a third matching network 14, and a fourth matching network 15, respectively, so as to form a 4 × 4MIMO antenna based on the metal frame 3 of the terminal. In the terminal with the metal frame antenna provided in the embodiment of the present application, the antenna of the terminal is constructed by using the gap between the metal floor 2 and the metal frame 3, the break point on the metal frame 3, and the metal frame 3, where the gap is used to provide a clearance area. In a specific use, the widths of the first slot 4, the second slot 5, the third slot 6 and the fourth slot 7 can be generally less than 2mm, so that the size of an antenna in the terminal to a clearance area is correspondingly reduced, and the terminal is convenient to adapt to the development trend of a narrow clearance environment of the terminal.
When the positions of the first break point 8, the second break point 9, the third break point 10 or the fourth break point 11 are changed relative to the first slot 4, the second slot 5, the third slot 6 and the fourth slot 7 in the embodiment of the present application, the corresponding matching network and the feeding form will be changed correspondingly. Fig. 1 and 2 only provide an arrangement of a first slit 4, a second slit 5, a third slit 6 and a fourth slit 7, which is used for illustrative purposes, but not limiting the present application, and the following describes the technical solution provided by the embodiments of the present application in detail with reference to fig. 1.
As shown in fig. 1 and 2, when the first slits 4 are distributed along the long side of the metal frame 3, one end of the first slit 4 is close to the short side of the metal frame 3, and the other end of the first slit 4 is far away from the short side. Note that one end of the first slit 4 near the short side is a start end of the first slit 4, and the other end of the first slit 4 is an end of the first slit 4. The first break point 8 is arranged at the position of the metal frame 3 corresponding to the end point. A point on the first slot 4 near the first break point 8 is selected as a feed point, and the tail end of the first matching network 12 performs coupling feed on the first slot 4 through a microstrip feed line at the feed point, that is, the microstrip feed line is connected with the first slot 4, that is, the formed first antenna is a slot antenna, and the radiation of the first antenna depends on the electric field of the first slot 4. Therefore, the first antenna selects the feed point near the first break point 8, the electric field intensity is relatively high, low-frequency resonance is more easily excited by combining with coupling feed, the first antenna can cover low-frequency bandwidth, and the performance of the mobile terminal antenna such as a mobile phone and the like in a low-frequency band is ensured.
Further, as shown in fig. 3, a first feeding branch 121 is disposed at the end of the first matching network 12, and the first matching network 12 performs coupling feeding on the first slot 4 through the first feeding branch 121. The first feeding branch 121 is an L-shaped feeding branch, and the first feeding branch 121 extends towards the direction in which the first gap 4 is far away from the first break point 8. The first feed branch 121 is used to increase the contact area between the first matching network 12 and the first slot 4, so as to further ensure the coverage of the first antenna at the low frequency bandwidth.
In the embodiment of the present application, the first matching network 12 includes a first inductor 122, a first capacitor 123, and a second capacitor 124; a first signal end of the first capacitor 123 is connected to a start end of the first matching network 12, and a second signal end of the first capacitor 123 is connected to a tail end of the first matching network 12; a first signal terminal of the second capacitor 124 is connected to a second signal terminal of the first capacitor 123, and a second signal terminal of the second capacitor 124 is grounded; a first signal terminal of the first inductor 122 is connected to a second signal terminal of the first capacitor 123, and a second signal terminal of the first inductor 122 is grounded. That is, the first matching network 12 performs impedance matching on the first antenna through the parallel inductor, the parallel capacitor and the series capacitor, reduces reflection and interference of a line, enables maximum power transmission from an information source to a load, increases the length of the antenna to a certain extent, enables resonance generated by the first antenna to be biased toward low frequency, facilitates miniaturization development of the antenna, and ensures coverage of the first antenna in low frequency bandwidth.
As shown in fig. 1 and 2, when the second gap 5 is distributed along the long side of the metal frame 3, the second gap 5 and the first gap 4 are located on the same side of the metal floor 2. The second gap 5 takes one end close to the first gap 4 as a starting end, and takes the other end far away from the first gap 4 as an end, and the second break point 9 is arranged at the position corresponding to the end of the metal frame 3, namely, the second break point 9 is arranged on the metal frame 3 connected with one end of the second gap 5 far away from the first gap 4. And selecting a point on the metal frame 3 connected with the second gap 5 and far away from the second breakpoint 9 as a feed point, wherein the second matching network 13 is connected with the feed point, and the second distribution network is directly connected with the second gap 5 through the feed point. The position of the feed point is arranged at one end, far away from the second break point 9, of the metal frame 3 connected with the second gap 5, so that the length of the metal frame between the feed point and the second break point 9 is ensured. The second antenna radiates by using the metal frame 3 corresponding to the second slot 5 and the metal floor 2 adjacent to the metal frame 3, and due to the fact that the radiation principle of the second antenna is different from that of the first antenna, the surface currents flowing on the adjacent metal floor 2 and flowing on each other of the second antenna and the first antenna are weaker, energy coupling between the second antenna and the first antenna is weaker, and isolation between the first antenna and the second antenna is improved.
As shown in fig. 4, the second matching network 13 includes a first matching circuit 131, a second matching circuit 132, a first switch 133 and a second switch 134, the first switch 133 correspondingly controls the first matching circuit 131 to be connected to the end of the second matching network 13, and the second switch 134 correspondingly controls the second matching circuit 132 to be connected to the end of the second matching network 13. That is, the first switch 133 controls the use of the first matching circuit 131, and the second switch 134 controls the use of the second matching circuit 132. Therefore, the second antenna resonant frequency band and the bandwidth are reconstructed through the switching of the matching circuit.
In this embodiment, a third switch 135 is connected in parallel to the metal frame 3 connected to the second slot 5, one end of the third switch 135 is connected to the metal frame 3, the other end of the third switch 135 is connected to a first signal terminal of a first cross-over capacitor 136, and a second signal terminal of the first cross-over capacitor 136 is grounded. The third switch 135 controls the connection and disconnection of the first crossover capacitor 136. When the third switch 135 is closed, the first crossover capacitor 136 is connected to the metal frame 3 through the third switch 135, that is, the first crossover capacitor 136 is connected to the antenna, so that the electrical length of the second antenna is changed, the reconfiguration of the second antenna is realized, and the adjustment, switching and change of the resonant frequency band and the bandwidth of the second antenna are further realized.
Further, by using the second matching network 13 comprising the first matching circuit 131, the second matching circuit 132, the first switch 133 and the second switch 134 in combination with the first crossover capacitor 136, a more optimal reconfiguration of the second antenna structure is achieved. For example, when the first switch 133 is closed, the second switch 134 and the third switch 135 are opened, and the first matching circuit 131 is turned on, the resonant frequency band of the second antenna can cover 824-894 MHz; the first switch 133 is opened, the second switch 134 and the third switch 135 are closed, the second matching circuit 132 and the first cross-over capacitor 136 are closed, and the resonant frequency band of the second antenna can cover 880-960 NHz. Therefore, the resonance and the bandwidth of the second antenna are tuned by accessing different matching circuits in a reconfigurable mode, and the resonance frequency band of the second antenna covers 824-960 MHz.
In the embodiment of the present application, the first matching circuit 131 includes a second inductor, a third capacitor, and a fourth capacitor; a first signal end of the third capacitor is connected to the first switch 133, a second signal end of the third capacitor is connected to a first signal end of the fourth capacitor, and a second signal end of the fourth capacitor is connected to the end of the first matching circuit 131; the first signal end of the second inductor is connected with the second signal end of the third capacitor, and the second signal end of the second inductor is grounded; and the first signal end of the third inductor is connected with the second signal end of the fourth capacitor, and the second signal end of the third inductor is grounded. The specific structure of the second matching circuit 132 may adopt a structure similar to that of the first matching circuit 131, and the detailed description is given in the first matching circuit 131, but the present invention is not limited thereto, and other existing matching circuits may be selected as needed, and are not described herein again.
Fig. 5 is a schematic diagram of simulation results of a first antenna and a second antenna provided in an embodiment of the present application, and fig. 6 is a schematic diagram of efficiencies of the first antenna and the second antenna. As shown in fig. 5, it can be seen that the first antenna can cover 824-960MHz under the adjustment of the first matching network 12, the second antenna can also cover 824-960MHz by switching two states in a reconfigurable manner, and the isolation of the two antennas is below-10 db, i.e. the two antennas on the same side still maintain good isolation when the feeding positions are close to each other. As shown in fig. 6, the efficiency of both antennas is above 45%, which meets the actual terminal requirements.
In the embodiment of the present application, the position relationship between the third slot 6 and the third break point 10, and the settings of the third matching network 14 and the like can be referred to the settings of each structure in the first antenna or the second antenna, that is, the structure of the third antenna can be referred to the first antenna or the second antenna; similarly, the position relationship between the fourth slot 7 and the fourth break point 11, and the settings of the fourth matching network 15 and the like can refer to the settings of each structure in the first antenna or the second antenna, that is, the structure of the fourth antenna can refer to the first antenna or the second antenna, and details are not repeated here.
In the present embodiment, the first gap 4 and the third gap 6 are symmetrical with respect to a central axis of the metal floor 2 in the length direction; the second gap 5 and the fourth gap 7 are symmetrical with respect to a central axis of the metal floor 2 in a length direction. Namely, two rectangular narrow slits are respectively opened along the two sides of the long edge of the metal floor 2, which is beneficial to reducing the influence of components such as a camera, a receiver and the like in the terminal on the performance of the antenna, and is convenient to process and manufacture and beautiful in structure.
Further, the third matching network 14 and the third break point 10 are symmetrical to the first matching network 12 and the first break point 8 about the central axis of the metal floor 2 in the length direction; the fourth matching network 15 and the fourth break point 11 are symmetrical to the second matching network 13 and the second break point 9 about a central axis in the longitudinal direction of the metal floor 2.
In the specific embodiment of the present application, in order to satisfy that the first break point 8, the second break point 9, the third break point 10, and the fourth break point 11 of 824-960MHz can be covered in the antenna resonance frequency band in the terminal, the widths are 1.5mm, and the length of the slot is adjusted according to the size of the terminal. When the breakpoint width is generally increased, the resonant frequency band is biased to a high frequency, and the bandwidth of the antenna is widened; when the break point width is reduced, the resonance band is biased toward a low frequency, and the antenna bandwidth is narrowed.
Fig. 7 is a schematic structural diagram of another terminal with a metal frame antenna according to an embodiment of the present application. As shown in fig. 7, if the feeding manner, the matching network, and the like are unchanged, the slot length of the terminal with the metal frame antenna shown in fig. 1 and 2 is narrowed, and the resonant frequency band of the antenna in the terminal can resonate in the frequency band of 2.4-2.7GHz, 3.3-3.6GHz, or 4.8-5.0 GHz.
All the embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments, and the relevant points may be referred to the part of the description of the method embodiment. It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (7)
1. A terminal with a metal frame antenna comprises a dielectric substrate, wherein a metal floor is arranged on a first surface of the dielectric substrate; the dielectric substrate is characterized by further comprising a metal frame, wherein the metal frame surrounds the periphery of the dielectric substrate;
the edge of the metal floor is provided with a first gap, a second gap, a third gap and a fourth gap which are not communicated with each other, and one sides of the first gap, the second gap, the third gap and the fourth gap, which are far away from the metal floor, are connected with the metal frame;
a first breakpoint, a second breakpoint, a third breakpoint and a fourth breakpoint are correspondingly arranged at one end of the metal frame connected with the first gap, the second gap, the third gap and the fourth gap;
the second surface of the dielectric substrate is respectively provided with a first matching network, a second matching network, a third matching network and a fourth matching network, the first matching network, the second matching network, the third matching network and the fourth matching network are respectively connected with one end of the first gap, the second gap, the third gap and the fourth gap in a one-to-one corresponding feeding manner, the tail end of the first matching network couples and feeds the first gap at the position of the first gap close to the first breakpoint, the tail end of the second matching network is connected with a metal frame connected with the second gap, the connection point of the second matching network and the metal frame is far away from the second breakpoint, the tail end of the third matching network couples and feeds the third gap at the position of the third gap close to the third breakpoint, and the tail end of the fourth matching network is connected with the metal frame connected with the fourth gap, the connection point of the fourth matching network and the metal frame is far away from the fourth breakpoint;
wherein: the first gap and the second gap are distributed along the same side of the metal floor, the third gap and the fourth gap are distributed along the same side of the metal floor, and the first gap and the third gap are positioned on the opposite sides of the metal floor;
the first break point is close to the second gap, the second break point is far away from the first gap, the third break point is close to the fourth gap, and the fourth break point is far away from the third gap.
2. The terminal according to claim 1, wherein a first feeding branch is arranged at an end of the first matching network, and the first feeding couples and feeds the first slot through the first feeding branch;
the first feed branch is an L-shaped feed branch, and the first feed branch extends towards the direction, away from the first break point, of the first gap.
3. The terminal of claim 1, wherein the second matching network comprises a first matching circuit, a second matching circuit, a first switch, and a second switch;
the first switch correspondingly controls the first matching circuit to be connected with the tail end of the second matching network, and the second switch correspondingly controls the second matching circuit to be connected with the tail end of the second matching network.
4. A terminal as claimed in claim 1 or 3, wherein a third switch is connected in parallel to the metal frame connected to the second slot, one end of the third switch is connected to the metal frame, the other end of the third switch is connected to the first signal terminal of the first cross-over capacitor, and the second signal terminal of the first cross-over capacitor is grounded.
5. The terminal of claim 1, wherein the first matching network comprises a first inductance, a first capacitance, and a second capacitance;
a first signal end of the first capacitor is a starting end of the first matching network, and a second signal end of the first capacitor is connected with a tail end of the first matching network; a first signal end of the second capacitor is connected with a second signal end of the first capacitor, and a second signal end of the second capacitor is grounded; the first signal end of the first inductor is connected with the second signal end of the first capacitor, and the second signal end of the first inductor is grounded.
6. A terminal as claimed in claim 3, in which the first matching circuit comprises a second inductance, a third capacitance and a fourth capacitance;
a first signal end of the third capacitor is connected with the first switch, a second signal end of the third capacitor is connected with a first signal end of the fourth capacitor, and a second signal end of the fourth capacitor is connected with the tail end of the first matching circuit; the first signal end of the second inductor is connected with the second signal end of the third capacitor, and the second signal end of the second inductor is grounded; and the first signal end of the third inductor is connected with the second signal end of the fourth capacitor, and the second signal end of the third inductor is grounded.
7. The terminal of claim 1, wherein the first gap and the third gap are symmetrical about a central axis of the metal floor in a length direction; the second gap and the fourth gap are symmetrical about a central axis of the metal floor in the length direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910205346.8A CN109818134B (en) | 2019-03-18 | 2019-03-18 | Terminal with metal frame antenna |
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| CN201910205346.8A CN109818134B (en) | 2019-03-18 | 2019-03-18 | Terminal with metal frame antenna |
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| CN109818134A CN109818134A (en) | 2019-05-28 |
| CN109818134B true CN109818134B (en) | 2021-06-25 |
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| CN201910205346.8A Active CN109818134B (en) | 2019-03-18 | 2019-03-18 | Terminal with metal frame antenna |
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| CN112467372B (en) * | 2019-09-06 | 2022-05-17 | 华为技术有限公司 | Antenna system, mobile terminal and signal transmission method |
| CN114069228B (en) * | 2020-08-07 | 2023-08-22 | 华为技术有限公司 | Antenna power supply system and electronic equipment |
| CN112259966B (en) * | 2020-09-28 | 2024-02-09 | 努比亚技术有限公司 | Multi-band antenna structure |
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| CN206134920U (en) * | 2016-09-26 | 2017-04-26 | 珠海市魅族科技有限公司 | Antenna of mobile terminal and mobile terminal |
| CN108649335A (en) * | 2018-05-15 | 2018-10-12 | Oppo广东移动通信有限公司 | Antenna module, electronic equipment and antenna switching method |
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| CN102760949A (en) * | 2011-04-27 | 2012-10-31 | 鸿富锦精密工业（深圳）有限公司 | Multiple-input-and-output antenna |
| CN103401061B (en) * | 2013-08-08 | 2015-04-15 | 电子科技大学 | Six frequency band smart phone MIMO (Multiple Input Multiple Output) antenna |
| CN103700925B (en) * | 2013-12-24 | 2016-06-22 | 上海安费诺永亿通讯电子有限公司 | A kind of all-metal mobile terminal double-slit antenna |
| CN104638365B (en) * | 2014-12-25 | 2017-12-05 | 中国电子科技集团公司第七研究所 | A kind of four unit broad-band slot mimo antennas of no decoupling arrangements |
| CN106252839A (en) * | 2016-08-30 | 2016-12-21 | 电子科技大学 | A kind of band becket reconfigurable LTE MIMO antenna for mobile phone |
| CN108701889B (en) * | 2016-11-17 | 2020-02-14 | 华为技术有限公司 | Communication terminal |
| CN106450745B (en) * | 2016-11-24 | 2019-05-07 | 北京小米移动软件有限公司 | Antenna and its manufacturing method, terminal |
| CN108270082B (en) * | 2018-01-19 | 2021-02-02 | Oppo广东移动通信有限公司 | Antenna assembly and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206134920U (en) * | 2016-09-26 | 2017-04-26 | 珠海市魅族科技有限公司 | Antenna of mobile terminal and mobile terminal |
| CN108649335A (en) * | 2018-05-15 | 2018-10-12 | Oppo广东移动通信有限公司 | Antenna module, electronic equipment and antenna switching method |
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Address after: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee after: Qingdao Hisense Mobile Communication Technology Co.,Ltd. Address before: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee before: HISENSE MOBILE COMMUNICATIONS TECHNOLOGY Co.,Ltd. |