CN107181045B - Antenna of mobile terminal and mobile terminal with same - Google Patents
Antenna of mobile terminal and mobile terminal with same Download PDFInfo
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- CN107181045B CN107181045B CN201710464235.XA CN201710464235A CN107181045B CN 107181045 B CN107181045 B CN 107181045B CN 201710464235 A CN201710464235 A CN 201710464235A CN 107181045 B CN107181045 B CN 107181045B
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- 239000002184 metal Substances 0.000 claims abstract description 19
- 230000005404 monopole Effects 0.000 claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims description 35
- 238000013461 design Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 230000005855 radiation Effects 0.000 description 19
- 230000004044 response Effects 0.000 description 18
- 238000004891 communication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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Classifications
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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
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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
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different 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
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/328—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors between a radiating element and ground
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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
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
Abstract
The invention provides an antenna of a mobile terminal and the mobile terminal with the antenna, wherein the mobile terminal is provided with a metal shell, the end part of the metal shell is cut to form a gap, the metal shell is divided into a narrow body part at one side of the edge of the end part and a body part at the other side by the gap, and the antenna comprises a first resonant circuit and a second resonant circuit; the first resonant circuit is coupled with the gap and comprises a first radiator, a feed end arranged on the body part, a first grounding end arranged on the body part, a first feed assembly and a fourth feed assembly, so as to form a loop antenna unit; the second resonant circuit is coupled with the gap and comprises a second radiator, a fourth grounding end arranged on the body part and a second feed component, so that a monopole antenna unit is formed. The technical scheme of the invention reduces the number of components of the antenna and the complexity of the whole design, and reduces the cost; the influence of the hand effect of the user on the antenna performance is reduced.
Description
Technical Field
The present invention relates to the field of mobile terminals, and in particular, to an antenna for a mobile terminal and a mobile terminal having the same.
Background
Today, with the development of communication technology, 2G, 3G, 4G, WIFI, GPS networks coexist, and in order to be compatible with different networks, an antenna of a mobile device needs to be able to operate on multiple frequency bands. In the field of mobile terminal devices, the design environment of antennas is very complex, space is limited, and sharing of the space structure with other functional components has to be considered. One of the limitations is simply designing a single antenna that cannot cover all the frequency bands required, and multiple antenna elements must be designed to meet the need to operate over multiple frequency bands. In addition, in recent years, wireless communication devices often employ metal as a housing, providing a better aesthetic effect than conventional plastic housing devices. However, designing antennas for such devices is difficult because most of the signals are hindered by metal components.
Attempts have been made in the prior art to solve this problem, and a common technical solution is to provide a slot in a metal casing, and to design an antenna based on the slot structure. As disclosed in U.S. patent publication (publication No. US9350081B 2), a switchable multi-radiator wideband antenna apparatus and a method of controlling the same, the antenna apparatus being provided in a hand-held mobile device (e.g., a cellular phone or a smart phone) operable in a low frequency band and a high frequency band. The antenna device comprises a metal radiator, two feed assemblies and a grounding assembly. A feed assembly is used to tune the antenna to operate in both the low and high frequency bands. The other feed assembly is used for enabling the antenna to work in a high-frequency band. A switching assembly is used to change the signal flow direction of the feeding assembly. The body (e.g., hand) of the user may cover or obstruct one of the antenna assemblies while the device is in operation. For the situation that the performance of the covered or blocked antenna component is reduced, the signal flow direction is automatically switched to another component, so that the robustness of the mobile device is improved.
The prior art enables support for multiple communication bands by providing multiple antenna assemblies within a mobile device, however the following problems remain:
1. the bandwidth of the antenna design in the prior art is narrower in the low frequency band (LB), and in order to cover the whole low frequency band, 3-4 frequency modulation states are often required;
2. if all frequency bands need to be covered in the same mobile equipment, a plurality of frequency modulation components are needed;
3. it is difficult to obtain optimal performance at low frequency, intermediate frequency and high frequency,
4. all fm components cannot be accessed with a single antenna feed.
Therefore, it is desirable to design an antenna suitable for a mobile terminal that can meet the operating requirements of multiple frequency bands with limited design environmental conditions while reducing component costs.
Disclosure of Invention
In order to overcome the technical defects, the invention aims to provide an antenna of a mobile terminal, wherein a slot is arranged on a metal shell of the mobile terminal, and a coupling antenna is designed based on the slot, so that the technical effects of covering multiple frequency bands and saving the cost of components are realized.
The invention discloses an antenna of a mobile terminal, which is provided with a metal shell, wherein the end part of the metal shell is cut to form a gap, the metal shell is divided into a narrow body part at one side of the edge of the end part and a body part at the other side by the gap, and the antenna comprises a first resonant circuit and a second resonant circuit; the first resonant circuit is coupled with the gap and comprises a first radiator, a feed end arranged on the body part, a first grounding end arranged on the body part, a first feed assembly and a fourth feed assembly, so as to form a loop antenna unit; the second resonant circuit is coupled with the gap and comprises a second radiator, a fourth grounding end arranged on the body part and a second feed component, so that a monopole antenna unit is formed.
Preferably, the first radiator is in an open ring shape and is arranged on the narrow body part, one end of the opening extends to the edge of the gap to form a first end part, the first end part is connected with the first grounding end through a first feed assembly, and the first feed assembly comprises a first inductor and a first capacitor which are connected in series; the other end of the opening extends along the gap to form a second end part, the second end part is connected with the feeding end through a fourth feeding assembly, the fourth feeding assembly comprises a second inductor and a signal source which are connected in series, and the second inductor is arranged in the gap and has the same arrangement direction as the second end part.
Preferably, the first resonant circuit further includes a second ground terminal provided to the body portion; the other end of the first radiator opening extends to the body part along the direction orthogonal to the second end part to form a third end part; the first resonant circuit further comprises a fifth feed assembly, the fifth feed assembly further comprises a second capacitor, and the third end portion is connected with the second grounding end through the second capacitor.
Preferably, the second radiator is a monopole type; the second feed assembly comprises a third inductor and a third capacitor which are connected in series.
Preferably, the antenna further includes a ground switching circuit coupled to the slot, and the ground switching circuit includes a third radiator, a third ground terminal disposed on the body portion, and a third feeding assembly.
Preferably, the third radiator is a monopole type; the third feed assembly comprises a change-over switch, a fourth capacitor and a grounding resistor, wherein the fourth capacitor and the grounding resistor are connected in parallel with the third radiator, and the change-over switch selects the fourth capacitor or the grounding resistor to be connected with the third grounding end.
Preferably, the first inductor and the third inductor are adjustable inductors, and the second capacitor is an adjustable capacitor.
The invention also discloses a mobile terminal comprising any antenna.
Preferably, a first antenna and a second antenna are arranged in the mobile terminal, and the two antennas have the same structure and are axially symmetrical.
After the technical scheme is adopted, compared with the prior art, the method has the following beneficial effects:
1. more frequency bands can be covered in the same antenna frequency modulation state, so that the number of components and the whole design complexity can be reduced, and the cost is reduced;
2. the influence of the hand effect of the user on the antenna performance is reduced.
Drawings
Fig. 1 is a schematic diagram of an antenna of a mobile terminal according to a preferred embodiment of the present invention;
fig. 2 is a schematic diagram of the topology of an antenna of a mobile terminal according to a preferred embodiment of the present invention;
fig. 3 is a detailed structural diagram of an antenna of a mobile terminal according to a preferred embodiment of the present invention;
fig. 4 is a schematic structural view of an antenna of a mobile terminal according to another preferred embodiment of the present invention;
FIG. 5 is a diagram showing experimental results of the radiation efficiency of the antenna of the mobile terminal according to a preferred embodiment of the present invention;
fig. 6 is a schematic diagram illustrating the experimental results of the antenna frequency band response of the mobile terminal according to a preferred embodiment of the present invention.
Reference numerals:
10-antenna, 20-metal housing, 21-narrow body, 22-body, 23-slot, 30-first resonant circuit, 31-first radiator, 311-first end, 312-second end, 313-third end, 32-feed, 33-first ground, 34-first feed, 341-first inductance, 342-first capacitance, 35-fourth feed, 351-second inductance, 352-signal source, 36-second ground, 37-fifth feed, 371-second capacitance, 40-second resonant circuit, 41-second radiator, 42-fourth ground, 43-second feed, 431-third inductance, 432-third capacitance, 50-ground switching circuit, 51-third radiator, 52-third ground, 53-third feed, 531-switching switch, 532-fourth capacitance, 533-ground resistance, 60-first antenna, 70-second antenna, 81-second radiation efficiency, 82-third radiation efficiency curve, 91-frequency band response curve, 91-third radiation efficiency curve, 92-frequency band response curve, 93-third radiation curve.
Detailed Description
Advantages of the invention are further illustrated in the following description, taken in conjunction with the accompanying drawings and detailed description.
Referring to fig. 1, there is shown a schematic structure of an antenna 10 of a mobile terminal according to a preferred embodiment of the present invention, the mobile terminal includes:
-a metal casing 20
The metal casing 20 is disposed on the surface of the mobile terminal, and mainly includes a back surface and four narrow sides, and is used for installing and protecting the internal components of the mobile terminal. The end of the metal shell 20 is cut to form a slit 23, and the metal shell is divided by the slit 23 into a narrow body 21 on one side of the end edge and a body 22 on the other side. The slit 23 may be provided at an upper end portion of the mobile terminal or at a lower end portion of the mobile terminal. The gap 23 is filled with a nonmetallic material to isolate the narrow body 21 and the body 22, so that the narrow body 21 and the body 22 are in an insulating state, and vibration induction is performed according to signals of the feed assembly.
The antenna 10 includes:
first resonant circuit 30
The first resonant circuit 30 is coupled to the slot 23, and includes a first radiator 31, a feed end 32 provided in the body 22, a first ground end 33 provided in the body 22, a first feed element 34, and a fourth feed element 35, which constitute a loop antenna unit. By resonance, it is meant that the frequency of one oscillating circuit causes it to resonate with another oscillating circuit (or electromagnetic wave) that is oscillating. The function of the first resonant circuit 30 in the antenna 10 is critical, and without the first resonant circuit 30, the antenna 10 cannot oscillate, i.e. cannot transmit or receive electromagnetic wave signals.
The first radiator 31 is an antenna in the narrow sense, which is a transducer that converts a signal propagating on a wired medium into an electromagnetic wave propagating in an unbounded medium (usually free space), or vice versa; is a component used in a radio device to transmit or receive electromagnetic waves. Engineering systems such as radio communication, broadcasting, television, radar, navigation, electronic countermeasure, remote sensing, radio astronomy and the like all rely on antennas to work when information is transmitted by electromagnetic waves. Usually antennas are reversible, i.e. the same pair of antennas can be used as both a transmitting antenna and a receiving antenna; the same antenna is the same as the basic characteristic parameters of transmission or reception; i.e. the reciprocal theorem of antennas. In this embodiment, the antenna 10 has a broader meaning than a narrower meaning, and further includes components such as the first resonant circuit 30 and the second resonant circuit 40, so that the antenna 10 can work in a plurality of frequency bands and the frequency can be adjusted. The antenna 10 works in a frequency band of a mobile communication network, and comprises a plurality of network modes such as 2G, 3G, 4G and the like, so as to support the information interaction between the mobile terminal and the outside.
The coupling refers to a phenomenon that there is a close fit and interaction between inputs and outputs of two or more circuit elements or electrical networks, etc., and energy is transferred from one side to the other side through the interaction. In this embodiment, the first resonant circuit 30 is coupled to the slot 23, that is, electric energy and electromagnetic energy are induced between the two, so as to emit electromagnetic waves or receive electromagnetic waves, thereby realizing a signal transmission function. The loop antenna is a structure in which a metal wire is wound into a certain shape, such as a circle, a square, a triangle, etc., and both ends of the conductor are used as output ends. Especially small loop antennas are most practical, such as antennas in radios, portable radio receiver antennas, radio navigation positioning antennas, probe antennas for field intensity gauges, etc. In this embodiment, the components of the first resonant circuit 30 form a loop antenna unit, so as to fully exploit the advantages of the loop antenna. The feed end 32 connects the antenna 10 and a feed line, and becomes a signal input end or an output end of the antenna 10. In this embodiment, only one feeding end 32 is provided, that is, the multi-band coverage of the antenna 10 is achieved through one feeding end 32, which is also a technical advantage of the present invention, so that the design space is saved, and the antenna structure resources are fully utilized.
Second resonant circuit 40
The second resonant circuit 40, coupled to the slot 23, includes a second radiator 41, a fourth ground 42 provided in the body 22, and a second feeding element 43, and constitutes a monopole antenna unit. The monopole antenna is a vertical quarter-wavelength antenna, and the antenna is equivalently arranged on a ground plane, and can be an actual ground, an effective ground of a vehicle body, a human body and the like. In this embodiment, each component of the second resonant circuit 40 forms a monopole antenna, and is connected across the two sides of the slot 23, and the ground plane thereof is the body 22.
Ground switching circuit 50
And a ground switching circuit 50 coupled to the slit 23, wherein the ground switching circuit 50 includes a third radiator 51, a third ground terminal 52 provided in the body 22, and a third power feeding unit 53. The ground switching circuit 50 is monopole-shaped and is connected across the two sides of the slot 23, and the ground plane thereof is the body 22.
In summary, the antenna 10 shown in fig. 1 has a macroscopic structure, and the arrangement of the first resonant circuit 30, the second resonant circuit 40, the ground switching circuit 50 and the slot 23 can be seen, and the internal structure of the above-mentioned circuits is described in detail below.
Referring to fig. 2, a schematic topology of an antenna 10 of a mobile terminal according to a preferred embodiment of the present invention is shown, wherein the connection relationship among the components inside the first resonant circuit 30, the second resonant circuit 40 and the ground switching circuit 50 is shown.
The first resonant circuit 30 further includes a second ground terminal 36 and a fifth feed assembly 37 disposed on the body portion 22. The first radiator 31 is connected with the first feeding assembly 34, the fourth feeding assembly 35 and the fifth feeding assembly 37; the first feeding component 34 is connected to the first ground terminal 33; the fourth feeding component 35 is connected with the feeding end 32; the fifth feeding assembly 37 is connected to the second ground 36.
Inside the second resonant circuit 40, the second radiator 41 is connected to the second feeding element 43, and the second feeding element 43 is connected to the fourth ground 42.
Inside the ground switching circuit 50, the third radiator 51 is connected to the third power feeding component 53, and the third power feeding component 53 is connected to the third ground terminal 52.
Referring to fig. 3, the internal structure and structural features of the first resonant circuit 30, the second resonant circuit 40 and the ground switching circuit 50 are further described for illustrating a detailed structural schematic diagram of an antenna of a mobile terminal according to a preferred embodiment of the present invention.
The first radiator 31 is in an open ring shape and is disposed on the narrow body 21, one end of the opening extends to the edge of the slit 23 to form a first end 311, and the first end 311 is connected to the first ground terminal 33 through a first feeding component 34. The other end of the opening extends along the slot 23 to form a second end 312, and the second end 312 is connected to the feeding end 32 through the fourth feeding assembly 35. The other end of the opening extends to the body portion 22 in a direction orthogonal to the second end 312 to form a third end 313.
The first feeding set 34 includes:
first inductance 341
And one end of the first inductor 341 is connected to the first ground terminal 33, and the other end is connected to the first capacitor 342.
First capacitor 342
And a first capacitor 342 having one end connected to the first inductor 341 and the other end connected to the first end 311. The first capacitor 342 and the first inductor 341 are in a series resonance state during operation.
The fourth feeding assembly 35 includes:
second inductance 351
The second inductor 351 is disposed in the slit 23 and has the same arrangement direction as the second end 312. The second inductor 351 has one end connected in series with the signal source 352 and the other end connected to the third terminal 313.
Signal source 352
A signal source 352 has one end connected to the feeding terminal 32 and the other end connected to the second inductor 351. The signal source 32 emits an electric signal of a certain frequency, resonates in the antenna 10, and is emitted as electromagnetic waves by the first radiator 31.
The fifth feeding assembly 37 includes:
second capacitor 371
And a second capacitor 371 having one end connected to the second ground terminal 36 and the other end connected to the third terminal 313.
The second feeding assembly 43 includes:
third inductance 431
And a third inductor 431 having one end connected to the fourth ground terminal 42 and the other end connected to the third capacitor 432.
Third capacitor 432
And a third capacitor 432 having one end connected to the second radiator 41 and the other end connected to the third inductor 431. The third capacitor 432 and the third inductor 431 operate in a series resonance state.
The third feeding assembly 53 includes:
-a change-over switch 531
The switch 531 includes a fixed end and a selection end, the fixed end is connected to the third ground terminal 52, and the selection end is connected to the fourth capacitor 532 and the ground resistor 533, respectively. The switch 531 is connected to one of the fourth capacitor 532 and the grounding resistor 533, so that the third radiator 51 is in a capacitor grounding or resistor grounding state, and the antenna 10 is indirectly in a different working state.
Fourth capacitance 532
And a fourth capacitor 532, one end of which is connected to the third radiator 51, and the other end of which is connected to the selection end of the switch 531, and which is grounded or suspended according to the operating state of the switch 531.
Ground resistance 533
And a grounding resistor 533, one end of which is connected to the third radiator 51, and the other end of which is connected to the selection end of the switch 531, and which is grounded or suspended according to the operating state of the switch 531. It can be easily seen that the grounding resistor 533 and the fourth capacitor 532 are connected in parallel to the third radiator 51, and are grounded respectively according to the operating state of the switch 531.
As a further improvement of the antenna 10, the first and third inductors 341, 431 are adjustable inductors, and the second capacitor 371 is an adjustable capacitor. In this embodiment, the adjustable components are selected as the type selection requirements of the above-mentioned inductance and capacitance, so that the inductance values of the first inductance 341 and the third inductance 431 can be changed, and the capacitance value of the second capacitance 371 can be changed. The change of the inductance value and the capacitance value changes the resonant frequency of the antenna 10, so that the antenna 10 can work at different frequencies by adjusting the inductance value and the capacitance value.
Referring to fig. 4, a schematic structure of an antenna of a mobile terminal according to another preferred embodiment of the present invention is shown, where the mobile terminal includes:
first antenna 60
The first antenna 60 has the same structure as the antenna 10, and is disposed on the left side of the upper end of the mobile terminal, so as to cover a plurality of frequency bands.
-a second antenna 70
The second antenna 70 has the same structure as the first antenna 60, is disposed on the right side of the upper end of the mobile terminal, is axially symmetrical to the first antenna 60, and can cover a plurality of frequency bands.
In this embodiment, two antennas are disposed in the mobile terminal, and the working states of the first antenna 60 and the second antenna 70 may be interchanged, for example, the first antenna 60 works in a transmitting state, and the second antenna 70 works in a receiving state. In addition, the antenna with better performance can be preferentially selected to work according to the signal radiation conditions of the antenna and the antenna, because the mobile terminal is often held by a user, and the electromagnetic wave radiation performance of the area shielded by the holding is often poor, the antenna is arranged in a state that at least one antenna is not shielded, and the communication performance of the mobile terminal is ensured.
Referring to fig. 5, in order to schematically illustrate the experimental results of the radiation efficiency of the antenna of the mobile terminal according to a preferred embodiment of the present invention, the experimental results of the radiation efficiency in 3 frequency modulation states are shown, which are a first radiation efficiency curve 81, a second radiation efficiency curve 82 and a third radiation efficiency curve 83. In FIG. 5, the abscissa is frequency in MHz, i.e., megahertz, and the abscissa axis ranges from 600MHz to 2670MHz; the ordinate is the radiation efficiency in dB, and the range of the ordinate is-1 dB to-6 dB.
The first radiation efficiency curve 81 has a better radiation efficiency in the frequency bands 780 MHz-960 MHz and 1950 MHz-2670 MHz, and in this frequency modulation state, the antenna 10 has better performance in the low frequency band and the high frequency band.
The second radiation efficiency curve 82 has better radiation efficiency at the frequency bands of 700 MHz-780 MHz and 1710 MHz-2310 MHz, and in this frequency modulation state, the antenna 10 has better performance in the middle frequency band and the high frequency band.
The third radiation efficiency curve 83 has better radiation efficiency at the frequency bands of 600 MHz-650 MHz, 860 MHz-1000 MHz, 1650 MHz-2250 MHz, and the antenna 10 has better performance at the intermediate frequency in the frequency modulation state.
Referring to fig. 6, in order to schematically illustrate the experimental results of the frequency band response of the antenna of the mobile terminal according to a preferred embodiment of the present invention, the experimental results of the frequency band response in 3 fm states are shown, which are a first frequency band response curve 91, a second frequency band response curve 92 and a third frequency band response curve 93. In FIG. 6, the abscissa is frequency, ranging from 500MHz to 3000MHz; the ordinate is the band response parameter.
The first band response curve 91 has a better band response at the frequency bands of 1050 MHz-1950 MHz, 2200 MHz-2400 MHz and 2700 MHz-3000 MHz, and in this frequency modulation state, the antenna 10 has better performance in the middle frequency band and a narrower response range in the high frequency band.
The second band response curve 92 has a better band response at the frequency bands of 800 MHz-1800 MHz and 2100 MHz-3000 MHz, and in this frequency modulation state, the antenna 10 has better performance in the medium frequency band and the high frequency band, and has significant response attenuation in the low frequency band.
The third band response curve 93 has better band response at the frequency bands of 650 MHz-1700 MHz and 2100 MHz-3000 MHz, and in this frequency modulation state, the antenna 10 has better performance at the low frequency band, the middle frequency band and the high frequency band, and the response range is wider.
Since the experimental results illustrated in fig. 5 and 6 are obtained under limited preset conditions, the technical effects of the antenna system according to the present invention are not limited to the experimental results illustrated in fig. 5 and 6. In practical applications, the frequency modulation parameters of the antenna system 10 are adjusted accordingly, so as to obtain different communication technical performances.
It should be noted that the embodiments of the present invention are preferred and not limited in any way, and any person skilled in the art may make use of the above-disclosed technical content to change or modify the same into equivalent effective embodiments without departing from the technical scope of the present invention, and any modification or equivalent change and modification of the above-described embodiments according to the technical substance of the present invention still falls within the scope of the technical scope of the present invention.
Claims (5)
1. An antenna for a mobile terminal having a metal case, an end of which is cut to form a slit, the metal case being divided into a narrow body portion on one side of an end edge and a body portion on the other side by the slit,
the antenna comprises a first resonant circuit and a second resonant circuit;
the first resonant circuit is coupled with the gap and comprises a first radiator, a feed end arranged on the body part, a first grounding end arranged on the body part, a first feed assembly and a fourth feed assembly, so as to form a loop antenna unit; the second resonant circuit is coupled with the gap and comprises a second radiator, a fourth grounding end arranged on the body part and a second feed component, so that a monopole antenna unit is formed;
the first radiator is in an open ring shape and is arranged on the narrow body part, one end of the opening extends to the edge of the gap to form a first end part, the first end part is connected with the first grounding end through a first feed assembly, and the first feed assembly comprises a first inductor and a first capacitor which are connected in series;
the other end of the opening extends along the gap to form a second end part, the second end part is connected with the feed end through a fourth feed assembly, the fourth feed assembly comprises a second inductor and a signal source which are connected in series, and the second inductor is arranged in the gap and has the same arrangement direction as the second end part;
the first resonant circuit further comprises a second grounding end arranged on the body part;
the other end of the first radiator opening extends to the body part along the direction orthogonal to the second end part to form a third end part;
the first resonant circuit further comprises a fifth feed assembly, the fifth feed assembly further comprises a second capacitor, and the third end part is connected with the second grounding end through the second capacitor;
the second radiator is of a single pole type; the second feed assembly comprises a third inductor and a third capacitor which are connected in series; the first inductor and the third inductor are adjustable inductors, and the second capacitor is an adjustable capacitor.
2. The antenna of claim 1, wherein the antenna comprises,
the antenna also comprises a grounding switching circuit which is coupled with the gap, and the grounding switching circuit comprises a third radiator, a third grounding end arranged on the body part and a third feed component.
3. The antenna of claim 2, wherein the antenna comprises,
the third radiator is of a single pole type;
the third feed assembly comprises a change-over switch, a fourth capacitor and a grounding resistor, wherein the fourth capacitor and the grounding resistor are connected in parallel with the third radiator, and the change-over switch selects the fourth capacitor or the grounding resistor to be connected with the third grounding end.
4. A mobile terminal, characterized by comprising an antenna according to any of claims 1-3.
5. The mobile terminal of claim 4, wherein,
two antennas as claimed in any one of claims 1-3 are arranged in the mobile terminal, and the two antennas have the same structure and are axially symmetrical.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710464235.XA CN107181045B (en) | 2017-06-19 | 2017-06-19 | Antenna of mobile terminal and mobile terminal with same |
| PCT/CN2017/089478 WO2018232677A1 (en) | 2017-06-19 | 2017-06-22 | Antenna for mobile terminal and mobile terminal having said antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710464235.XA CN107181045B (en) | 2017-06-19 | 2017-06-19 | Antenna of mobile terminal and mobile terminal with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
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| WO (1) | WO2018232677A1 (en) |
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| EP3709441B1 (en) * | 2017-12-28 | 2023-11-01 | Huawei Technologies Co., Ltd. | Multi-frequency antenna and mobile terminal |
| CN108493616A (en) * | 2018-02-28 | 2018-09-04 | 上海与德科技有限公司 | Antenna |
| CN108987908B (en) * | 2018-07-27 | 2021-05-18 | 北京小米移动软件有限公司 | Antenna and mobile terminal |
| CN109687148B (en) * | 2018-11-23 | 2021-08-24 | 合肥联宝信息技术有限公司 | Multi-antenna structure with metal ring combined with slit |
| CN109586036B (en) * | 2018-12-29 | 2021-04-06 | 维沃移动通信有限公司 | Antenna structure and wireless communication terminal |
| CN111628298B (en) * | 2019-02-27 | 2022-03-11 | 华为技术有限公司 | Integrated antenna and electronic device |
| CN112186354A (en) * | 2019-07-03 | 2021-01-05 | 华为技术有限公司 | Antenna and terminal equipment |
| CN114447583B (en) * | 2019-08-23 | 2023-09-01 | 华为技术有限公司 | Antenna and electronic equipment |
| CN112952361B (en) * | 2019-11-26 | 2022-04-12 | 华为技术有限公司 | Electronic device |
| CN111725602B (en) * | 2020-03-19 | 2022-03-01 | 上海航天测控通信研究所 | Modular combined helical antenna |
| CN113708093B (en) * | 2020-05-22 | 2024-02-06 | 北京小米移动软件有限公司 | Antenna structure and electronic equipment |
| CN113745809B (en) * | 2020-05-27 | 2023-08-22 | 华为技术有限公司 | Electronic equipment |
| CN112018519B (en) * | 2020-08-31 | 2022-03-15 | 维沃移动通信有限公司 | Antenna structure and electronic equipment |
| CN114284695B (en) * | 2020-09-28 | 2023-07-07 | 华为技术有限公司 | Antenna unit and communication device |
| CN112542694B (en) * | 2020-12-09 | 2023-06-09 | Oppo广东移动通信有限公司 | Antenna assembly and electronic equipment |
| CN112768959B (en) * | 2020-12-29 | 2024-01-02 | Oppo广东移动通信有限公司 | Antenna assembly and electronic equipment |
| CN113690577B (en) * | 2021-08-31 | 2023-07-07 | 维沃移动通信（杭州）有限公司 | Wearing equipment and control method thereof |
| CN115764307A (en) * | 2021-09-03 | 2023-03-07 | 荣耀终端有限公司 | Terminal monopole antenna |
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| Publication number | Publication date |
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| WO2018232677A1 (en) | 2018-12-27 |
| CN107181045A (en) | 2017-09-19 |
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