CN111092295A - Antenna, antenna adjusting method, terminal and storage medium - Google Patents
Antenna, antenna adjusting method, terminal and storage medium Download PDFInfo
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- CN111092295A CN111092295A CN201911293597.2A CN201911293597A CN111092295A CN 111092295 A CN111092295 A CN 111092295A CN 201911293597 A CN201911293597 A CN 201911293597A CN 111092295 A CN111092295 A CN 111092295A
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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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
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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
- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3833—Hand-held transceivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The embodiment of the invention discloses an antenna, an antenna adjusting method, a terminal and a storage medium. The antenna comprises a first antenna and a second antenna which work in different frequency bands, wherein the first antenna comprises a first antenna body, the second antenna comprises a second antenna body, and a preset gap is formed between the first antenna body and the second antenna body; the first antenna also comprises an impedance tuning circuit, and the impedance tuning circuit is arranged between the first antenna body and the first antenna feed point; the impedance tuning circuit comprises a variable capacitor, a first inductor, a second inductor, a first change-over switch and a second change-over switch, wherein one end of the variable capacitor is connected with the first antenna body through a first branch circuit, and the other end of the variable capacitor is connected with the first antenna feed point through a second branch circuit; one end of the first change-over switch is connected with the first branch circuit, and the other end of the first change-over switch is grounded through the first inductor; one end of the second change-over switch is connected with the second branch circuit, and the other end of the second change-over switch is grounded through the second inductor. The antenna carries out signal fusion, and full-band coverage is realized under the condition of multiple CA.
Description
Technical Field
Embodiments of the present invention relate to antenna technologies, and in particular, to an antenna, an antenna adjustment method, a terminal, and a storage medium.
Background
The existing mobile phone antenna is usually designed in an integrated mode and is arranged inside a mobile phone, the screen occupation ratio of the current mobile phone is larger and larger, so that the clearance area of the mobile phone antenna is seriously compressed, the effective bandwidth and the antenna radiation efficiency of the mobile phone antenna are difficult to balance, and the performance of the antenna is reduced.
Disclosure of Invention
The embodiment of the invention provides an antenna, an antenna adjusting method, a terminal and a storage medium, which are used for expanding the effective bandwidth of the antenna under the condition of small antenna clearance area.
In one embodiment, the present invention provides an antenna, including a first antenna and a second antenna operating in different frequency bands, where the first antenna includes a first antenna body, the second antenna includes a second antenna body, and a preset gap is provided between the first antenna body and the second antenna body; the first antenna further comprises an impedance tuning circuit disposed between the first antenna body and the first antenna feed point; wherein the content of the first and second substances,
the impedance tuning circuit comprises a variable capacitor, a first inductor, a second inductor, a first change-over switch and a second change-over switch, wherein one end of the variable capacitor is connected with the first antenna body through a first branch circuit, and the other end of the variable capacitor is connected with the first antenna feed point through a second branch circuit; one end of the first change-over switch is connected with the first branch circuit, and the other end of the first change-over switch is grounded through the first inductor; one end of the second change-over switch is connected with the second branch circuit, and the other end of the second change-over switch is grounded through the second inductor.
In an embodiment, there is further provided an antenna adjusting method applied to the antenna according to any embodiment of the present invention, where the antenna adjusting method includes:
acquiring a base station signal;
and adjusting the working states of the first change-over switch and the second change-over switch according to the frequency of the base station signal, and adjusting the capacitance value of the variable capacitor according to the frequency of the base station signal so as to match the working frequency of the first antenna with the frequency of the base station signal.
In an embodiment, a terminal is further provided, where the terminal is provided with the antenna adjustment antenna according to any embodiment of the present invention.
In one embodiment, there is also provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the antenna adjustment method according to any of the embodiments of the present invention.
According to the embodiment of the invention, a first antenna covers a medium-low frequency signal, and a second antenna covers a high-frequency signal; the first antenna is provided with the impedance tuning circuit, so that tuning of low-frequency signals is realized, the antenna achieves a resonance effect with base station signals in a low-frequency signal section, and signal matching of the medium-frequency band is realized through a frequency doubling technology. And the high-frequency signal is slightly influenced by the outside, so that good signal coverage and signal matching can be realized without tuning. Through the signal fusion to first antenna and second antenna for the antenna that this embodiment provided can satisfy the requirement of full frequency channel coverage under the many CA condition, has expanded the bandwidth of antenna, has solved the terminal and has occupied under the condition of comparing at big screen, and antenna performance descends, can not cover the problem of full frequency channel.
Drawings
Fig. 1 is a block diagram of a structure of an antenna according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an impedance tuning circuit according to an embodiment of the present invention;
fig. 3 is a flowchart of an antenna adjustment method according to an embodiment of the present invention;
fig. 4 is a diagram of a scattering parameter simulation effect of an antenna obtained based on the switching logic and the adjustment parameter of table one according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a terminal configured with an antenna according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The antenna provided by the embodiment of the invention can be suitable for the condition that the performance of the antenna is reduced due to the reduction of the clearance area of the antenna, the clearance area is a clean space reserved for the antenna, and irrelevant parts such as a metal element, an isolation battery, an oscillator, a shielding case, a camera and the like are not arranged in the space. Currently, in a full-screen terminal, a clear area is severely compressed due to an increase in screen occupation ratio, resulting in a decrease in effective bandwidth of an antenna and a decrease in communication efficiency. Fig. 1 is a block diagram of a structure of an antenna according to an embodiment of the present invention, where the antenna 10 includes: the antenna comprises a first antenna 110 and a second antenna 120 working in different frequency bands, wherein the first antenna 110 comprises a first antenna body 111, the second antenna 120 comprises a second antenna body 121, and a gap is formed between the first antenna body 111 and the second antenna body 121; the first antenna 110 further includes an impedance tuning circuit 112, the impedance tuning circuit 112 is disposed between the first antenna body 111 and the first antenna feed point 113; fig. 2 is a schematic structural diagram of the impedance tuning circuit provided in this embodiment, wherein,
the impedance tuning circuit 112 includes a variable capacitor 1120, a first inductor 1123, a second inductor 1124, a first switch 1121, and a second switch 1122, wherein one end of the variable capacitor 1120 is connected to the first antenna body 111 through a first branch, and the other end is connected to the first antenna feed point 113 through a second branch; one end of the first switch 1121 is connected to the first branch, and the other end is grounded through the first inductor 1123; the second switch 1122 has one end connected to the second branch and the other end connected to ground through the second inductor 1124.
Among them, the antenna 10 can efficiently radiate electromagnetic waves to a space or can efficiently receive electromagnetic waves. The first antenna 110 and the second antenna 120 operate in different frequency bands, so that the antennas can adapt to a multi-CA (Carrier Aggregation) condition, specifically, the first antenna 110 operates in a medium-low frequency band, the second antenna 120 operates in a high frequency band, and frequency coverage of full-frequency band signals can be achieved under the multi-CA condition by fusing oscillation current signals transmitted by the two antennas or received electromagnetic wave signals. For example, the transmit signals or receive signals of the two antennas may be fused by radio frequency circuitry. In one embodiment, the rf circuit selects an rf device with a signal combining function, and may be specifically a combiner, to effectively combine signals of the first antenna 110 and the second antenna 120. In one embodiment, signals of the first antenna 110 and the second antenna 120 are fused and output by using a dual-port synthesizer, two signal input ports of the dual-port synthesizer are respectively connected to the first antenna feed point 113 and the second antenna feed point 122, and a signal output port of the dual-port synthesizer is connected to a radio frequency front end in the terminal, so that the terminal covers full-band signals through the first antenna 110 and the second antenna 120.
In one embodiment, the operating frequency band of the first antenna 110 is 0.6GHz to 2.2 GHz; the working frequency band of the second antenna 120 is 2.3 to 2.7 GHz. Further, the working frequency band of the first antenna 110 includes a low frequency band and a middle frequency band, wherein the low frequency band is 600MHz to 960MHz, and the middle frequency band is 1.71GHz to 2.2 GHz.
The lengths of the first antenna body 111 and the second antenna body 121 are determined according to the signal wavelength of the respective working frequency bands, wherein the length of the first antenna body 111 is determined according to the signal wavelength of the low frequency band. A preset gap is provided between the first antenna body 111 and the second antenna body 121 to physically form two independent antenna 10 structures, so that the first antenna 110 and the second antenna 120 can independently work in different frequency bands. In one embodiment, a preset gap between the first antenna body 111 and the second antenna body 121 is set to be not less than 2mm to avoid mutual interference between the first antenna 110 and the second antenna 120.
The impedance tuning circuit 112 is a matching network of the first antenna 110, and the low frequency signal is tuned by the impedance tuning circuit 112 to match the low frequency signal to the resonance frequency of the base station signal. Because the low frequency signal is easily affected by the environment, for example, the low frequency signal is more sensitive to the size of the clearance area, the low frequency signal is more easily affected by other radio frequency signals, and the like, the impedance tuning circuit 112 is arranged to tune the first antenna 110, so that the operating frequency of the first antenna 110 is switched during the low frequency signal, and the operating frequency of the antenna is matched with the frequency of the base station signal.
In one embodiment, the first antenna 110 achieves coverage of the intermediate frequency signal through a frequency tripling technique. Specifically, when the terminal operates in a SISO (single input single output) communication state, because the terminal only needs to match a signal of a certain frequency band at the same time, when the base station signal is in the middle frequency band, the impedance tuning circuit 112 is adjusted, that is, the low frequency signal is adjusted, and then the coverage and matching of the middle frequency signal are realized through frequency tripling. When the terminal operates in the multi-CA communication state, the first antenna 110 mainly matches the low frequency signal, so that the first antenna 110 has the best matching effect with the base station signal in the low frequency signal section, and the intermediate frequency signal does not need to reach the best matching state.
The impedance tuning circuit 112 is a unitary structure, that is, the impedance tuning circuit 112 is a device packaged as a whole. In one embodiment, the impedance tuning circuit 112 receives the control signal and outputs the signal by way of pins, and outputs the adjustment result of the impedance tuning circuit as a whole. The first switch 1121 is used to control the first inductor 1123 to be turned on or off, and the second switch 1122 is used to control the second inductor 1124 to be turned on or off, so that the impedance tuning circuit has two different tuning modes by adjusting the working states of the two switches. Therefore, the on/off of the two switches can be controlled according to the transmission frequency of the base station, and the capacitance value of the variable capacitor 1120 can be adjusted, so as to switch the resonance point of the first antenna 110, and make the first antenna 110 modulated to match the signal frequency of the base station.
The inductance parameters of the first inductor 1123, the second inductor 1124, and the capacitance parameter of the variable capacitor 1120 are determined according to the S parameter (scattering parameter) of the antenna and the conversion efficiency of the antenna. Specifically, after the terminal device is assembled, in a debugging stage, the inductance value and the capacitance value in the impedance tuning circuit need to be determined according to the S parameter of the antenna, because hardware for generating radio frequency signals in different terminal devices may be different, and the strength of the radio frequency signals affecting the antenna is also different, so after the terminal device is assembled, the specific inductance value and capacitance value need to be determined by combining the S parameter of the antenna, so that the antenna has the best conversion efficiency.
It should be noted that the impedance tuning circuit provided in this embodiment is a simplified circuit structure, and the specific structures of the switch and the variable capacitor 1120 shown in the figure may have different expressions, which is not described again in this embodiment.
The first antenna 110 is a Monopole antenna or an ifa (inverted antenna) antenna; the second antenna 120 is one of a Monopole antenna, an IFA antenna, and a Loop antenna (Loop antenna). In one embodiment, the first antenna 110 is a Monopole antenna and the second antenna 120 is a Loop antenna.
The antenna 10 includes a metal part and a plastic part connected as a whole, the metal part includes a first metal part as the first antenna body 111 and a second metal part as the second antenna body 121, one part of the plastic part covers the metal part, and the other part is located at a preset gap to form an antenna clearance area.
In one embodiment, in order to increase the clearance area of the antenna as much as possible under the condition of large screen ratio, the metal part and the plastic part are made in an injection molding mode. In particular to a process for synthesizing an integrated outer frame by die-casting middle frame metal and in-mold injection molding, wherein,
the die-casting forming middle frame metal comprises: smelting an ADC12 alloy (No. 12 aluminum material), die-casting and molding, wherein a stamping process is performed by rough machining and then fine machining, meanwhile, a tapping machine is used for machining a screw hole, surface phosphating (skin coating) is performed on the alloy to improve the adhesive force, and then laser etching is performed on a metal position needing to enhance the conductive capability to manufacture a first antenna body 111 and a second antenna body 121;
the in-mold injection molding comprises the following steps: the method is characterized in that plastic and 10% glass fiber materials are adopted for injection molding, then a numerical control machine tool is used for processing and polishing metal connecting materials, side hole positions and the like, and finally paint is sprayed to finish the process flow. Therefore, the plastic part is manufactured, and the plastic part is wrapped by the metal part to form an integrated antenna 10 type structure.
The first antenna body 111 and the second antenna body 121 are formed by die-casting metal, and the die-casting metal is combined with the in-mold injection molding, so that the antenna 10 body is bonded with plastic cement and the like, the integration of a product can be realized, and the surface decoration of the product or the characteristic structure of the product can be realized.
The first antenna body 111 and the second antenna body 121 are manufactured in an in-mold injection molding mode, so that the clearance area of the antenna is increased, the bandwidth of the antenna is expanded, the radiation efficiency of the antenna is improved, and all indexes of the first antenna body 111 and the second antenna body 121 meet the standard; and the production cost is reduced, and the method has good economical efficiency.
The second antenna 120 works in the high-frequency signal section, and the high-frequency signal is less interfered by the environment, so that impedance adjustment of the second antenna 120 is not needed, specifically, the second antenna body 121 is connected with the second antenna feed point 122 through the elastic piece, and the coverage of the antenna on the high-frequency signal section is realized.
The antenna provided by the embodiment covers the medium-low frequency signal through the first antenna, and covers the high-frequency signal through the second antenna; the first antenna is provided with the impedance tuning circuit, so that tuning of low-frequency signals is realized, the antenna achieves a resonance effect with base station signals in a low-frequency signal section, and signal matching of the medium-frequency band is realized through a frequency doubling technology. And the high-frequency band signal is slightly influenced by the outside, so that good signal coverage and signal matching can be realized without tuning. By fusing the signals of the first antenna and the second antenna, the antenna provided by the embodiment can meet the requirement of full-band coverage under the multi-CA combination condition that low and medium frequency bands coexist simultaneously, the ultra-wide frequency band coverage of 600 MHz-3 GHz is realized, the bandwidth of the antenna is expanded, and the problems that the performance of the antenna is reduced and the full band cannot be covered under the condition that the terminal occupies a large screen are solved.
Based on the above antenna, this embodiment further provides an antenna adjusting method, which is applicable to a case of multi-CA combination, and fig. 3 is a flowchart of the antenna adjusting method provided in this embodiment, where the method includes:
and S310, acquiring a base station signal.
The terminal acquires the frequency of the base station signal by monitoring the base station signal. And matching the medium and low frequency signals of the base station through the first antenna and matching the high frequency signals of the base station through the second antenna. In one embodiment, the frequency range of the medium-low frequency band signal is 0.6 GHz-2.2 GHz, the frequency range of the high-frequency band signal is 2.3-2.7 GHz, the first antenna and the second antenna work in different frequency bands, the two independent antennas are used for realizing the comprehensive coverage of the medium-low frequency signal and the high-frequency signal, and the working bandwidth of the antennas is widened.
The first antenna and the second antenna are subjected to signal fusion through the radio frequency device, the requirement of multi-CA combination can be met, and full-band coverage of signals under the condition of multi-CA combination is achieved.
S320, adjusting the working states of the first change-over switch and the second change-over switch according to the frequency of the base station signal, and adjusting the capacitance value of the variable capacitor according to the frequency of the base station signal so as to enable the working frequency of the first antenna to be matched with the frequency of the base station signal.
If the base station signal belongs to the first preset frequency band, the working frequency of the first antenna needs to be adjusted, so that the oscillation frequency of the first antenna and the base station signal are resonated. The basic operating principle of the tuned circuit is shown in equation (1),
wherein f is the oscillation frequency of the oscillation circuit, L is the inductance value, and C is the capacitance value.
It can be seen that the frequency of the oscillating circuit can be adjusted by adjusting the inductance or the capacitance, and usually, the tuning of the oscillating circuit is realized by adjusting the capacitance.
The inductance value of the impedance tuning circuit can be adjusted through the states of the first change-over switch and the second change-over switch, so that the first readjustment of the impedance tuning circuit is realized by adjusting the working states of the two change-over switches. Further, by adjusting the capacitance value of the variable capacitor, a second readjustment of the impedance tuning circuit is achieved. Therefore, the impedance tuning circuit provided by the embodiment adjusts the oscillation frequency of the impedance tuning circuit by adjusting the inductance and the capacitance doubly. And the efficiency of adjusting the impedance tuning circuit can be improved by adjusting the inductance and then adjusting the capacitance.
In one embodiment, adjusting the operating states of the first switch and the second switch according to the frequency of the base station signal specifically includes:
comparing the frequency of the base station signal with a preset frequency threshold;
if the frequency of the base station signal is greater than the preset frequency threshold, controlling the first switch to be switched off, and controlling the second switch to be switched on;
and if the frequency of the base station signal is less than or equal to the preset frequency threshold, controlling the first change-over switch to be switched on, and switching off the second change-over switch.
The preset frequency threshold value can be determined according to the working efficiency of the antenna and the scattering parameters of the antenna. Specifically, the frequency of the control signal changes in a low frequency band, the working states of the two change-over switches are adjusted, and the working efficiency of the antenna and the scattering parameters of the antenna under corresponding working conditions are detected, so that a frequency value which has a significant influence on the working efficiency of the antenna and the scattering parameters of the antenna is determined and used as a preset frequency threshold value. In one embodiment, in the process of changing the signal frequency from 960MHz to 600MHz (i.e. low-band signal), when the signal frequency is greater than 800MHz, the scattering parameter of the antenna and the operating efficiency of the antenna when the first switch is turned off and the second switch is turned on are better than those when the first switch is turned on and the second switch is turned off, and vice versa when the signal frequency is less than or equal to 800 MHz. Namely, at 800MHz, the influence of the combined state of the first switch and the second switch on the scattering parameter of the antenna and the working efficiency of the antenna just appears as a boundary, and accordingly, the preset frequency threshold in this embodiment is 800 MHz. The working state of the selector switch is determined based on the comparison result of the base station signal and the preset frequency threshold, so that the impedance tuning circuit can achieve the best tuning effect.
Controlling the first switch to be switched off and the second switch to be switched on, wherein at the moment, the impedance tuning circuit forms a circuit structure which is firstly connected with a capacitor in series and then connected with an inductor in parallel; and controlling the first switch to be switched on and the second switch to be switched off, wherein at the moment, the impedance tuning circuit forms a circuit structure that an inductor is firstly connected in parallel and then a capacitor is connected in series. The frequency modulation effect of the oscillating circuit is different between the circuit structure of firstly connecting the capacitor in series and then connecting the inductor in parallel and the circuit structure of firstly connecting the inductor in parallel and then connecting the capacitor in series. Therefore, the impedance tuning circuit has different circuit structures by controlling the working states of the two change-over switches, so that the impedance tuning circuit can tune the antenna according to the preset circuit structure.
Adjusting the capacitance value of the variable capacitor according to the frequency of the base station signal specifically includes:
determining a subdivided wave band to which the base station signal belongs according to the frequency of the base station signal;
and adjusting the capacitance value of the variable capacitor to a matching value corresponding to the subdivided wave band.
Wherein the high frequency signal and the medium and low frequency signals each comprise a plurality of sub-divided bands. The matching value is a capacitance value preset in the terminal to enable the impedance tuning circuit to achieve an optimal tuning state, and is a capacitance value corresponding to each of the divided bands. Each subdivided wave band corresponds to a matching value, and after the subdivided wave band of the base station signal is determined, the terminal can determine the matching value through a preset corresponding relation. When the capacitance value of the variable capacitor is adjusted to a matching value, the resonant frequency of the antenna can be adjusted to a preset subdivided waveband, so that the first antenna has the best communication efficiency. The corresponding relation between the matching value and the subdivided wave band is preset in the system, in one embodiment, a corresponding relation list between the subdivided wave band and the matching value is preset in the terminal, and the terminal determines the matching value corresponding to the current base station signal by searching the corresponding relation list.
In one embodiment, the preset frequency threshold is set to 800MHz, and tuning is performed according to the operating state and the capacitance value shown in table one, so that good matching of the low-frequency band signal is achieved. For example, when the frequency of the base station signal is 670MHz, which is smaller than the preset frequency threshold of 800MHz, the first switch is controlled to be in the on state, and the second switch is controlled to be in the off state. And further confirming that the current base station signal belongs to a subdivided wave band of 600-700 MHz, so that the capacitance value of the variable capacitor is adjusted to be a matching value of 8.5pf, and the tuning of the antenna is completed.
Watch 1
| Subdivided wave band | Variable capacitance | First switch | Second change-over switch |
| 600MHz～700MHz | 8.5pf | Conduction of | Disconnect |
| 700MHz～800MHz | 5.6pf | Conduction of | Disconnect |
| 800MHz～900MHz | 2.7pf | Disconnect | Conduction of |
| 900MHz～960MHz | 1.5pf | Disconnect | Conduction of |
Fig. 4 is a scattering parameter simulation effect diagram of the antenna obtained based on the switching logic and the adjustment parameter of table one provided in this embodiment, and it can be seen from fig. 4 that, by using the parameters in the table one, the resonance of the antenna is deepened, the radiation efficiency of the antenna is improved, and the antenna has a good signal matching effect in a low-frequency signal section.
The inductance is adjusted by adjusting the two change-over switches, the resonant frequency of the antenna is adjusted by adjusting the capacitance value, and finally the working frequency of the first antenna is matched with the frequency of a base station signal.
The principle of the antenna adjusting method is as follows: the transmitting frequency of the base station is compared with a first preset frequency threshold value, and the inductance is adjusted through the change-over switch; adjusting the variable capacitor to an optimal matching point based on the frequency of the base station signal, so that the resonant frequency of the first antenna is matched with the frequency of the base station signal, and tuning of the low-frequency signal section is completed; and the high frequency band is matched through the second antenna, so that the full frequency band is covered.
According to the technical scheme of the embodiment, when the base station signal is determined to belong to the low-frequency signal, the inductance is adjusted by controlling the working states of the two change-over switches; then, by determining the frequency segment of the reference signal, the variable capacitor is adjusted to enable the capacitance value to reach a matching value; through carrying out dual regulation to inductance and electric capacity, realize adjusting the resonant frequency of antenna for the resonant frequency of antenna and the frequency phase-match of basic station signal let the transmission or the receiving efficiency of antenna reach the best, thereby improved communication effect. And further, the high-frequency signal of the base station is matched through the set second antenna, so that the antenna has good matching to a high-frequency band. In the embodiment, the first antenna and the second antenna are respectively matched with the medium-low frequency band signal and the high-frequency band signal, and the high-frequency signal and the medium-low frequency signal are fused through the synthesis device, so that the antenna can meet the signal coverage requirement under the multi-CA combination condition when the medium-low high frequency band signal and the medium-high frequency band signal coexist simultaneously, the ultra-wide frequency band coverage of 600 MHz-3 GHz is realized, the problem of insufficient bandwidth caused by reduction of a clearance area of the antenna is solved, and the communication bandwidth of the antenna is fully expanded.
In addition, this embodiment still provides a terminal, and this terminal is provided with the antenna that this embodiment provided to make terminal equipment can work in full frequency channel.
In one embodiment, a schematic structural diagram of a terminal configured with an antenna is shown in fig. 5, wherein the terminal includes a metal shell and a plastic shell (not shown in the figure) that are integrally connected, the plastic shell covers the metal shell, and the metal shell includes a first antenna body 111 and a second antenna body 121. The antenna may be disposed in a top region of the terminal, wherein the second antenna 120 is disposed on the left side, the first antenna 110 is disposed on the right side, and the first antenna body 111 and the second antenna body 121 are disposed in the terminal by means of in-mold injection. The first antenna body 111 is connected to the first antenna feed point 113 through the impedance tuning circuit 112, and the second antenna body 121 is connected to the second antenna feed point 122 through the spring.
The terminal provided in the present embodiment is further described below as an embodiment. Fig. 6 is a schematic structural component diagram of the terminal provided in this embodiment, and fig. 6 is a block diagram of an exemplary terminal 612 suitable for implementing an embodiment of the present invention. The terminal 612 shown in fig. 6 is only an example, and should not bring any limitation to the functions and the scope of the application of the embodiments of the present invention.
As shown in fig. 6, terminal 612 is in the form of a general purpose computing terminal. The components of terminal 612 may include, but are not limited to: one or more processors or processing units 616, a system memory 628, and a bus 618 that couples various system components including the system memory 628 and the processing unit 616.
The system memory 628 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM)630 and/or cache memory 632. Terminal 612 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 634 may be used to read from or write to non-removable, nonvolatile magnetic media (not shown in FIG. 6, commonly referred to as a "hard disk drive"). Although not shown in FIG. 6, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In such cases, each drive may be connected to bus 618 by one or more data media interfaces. Memory 628 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.
A program/utility 640 having a set (at least one) of program modules 642 may be stored, for example, in memory 628, such program modules 642 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. The program modules 642 generally perform the functions and/or methods of the described embodiments of the present invention.
The terminal 612 may also communicate with one or more external terminals 614 (e.g., keyboard, pointing terminal, display 624, etc.), with one or more terminals that enable a user to interact with the terminal 612, and/or with any terminals (e.g., network card, modem, etc.) that enable the terminal 612 to communicate with one or more other computing terminals. Such communication may occur via input/output (I/O) interfaces 622. Also, the terminal 612 can communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN) and/or a public network, such as the Internet) via the network adapter 620. As shown, the network adapter 620 communicates with the other modules of the terminal 612 via a bus 618. It should be appreciated that although not shown, other hardware and/or software modules may be used in conjunction with the terminal 612, including but not limited to: microcode, end drives, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
The processing unit 616 executes programs stored in the system memory 628, so as to execute various functional applications and data processing, for example, implement the antenna adjusting method provided by the embodiment of the present invention, where the method specifically includes:
acquiring a base station signal;
and adjusting the working states of the first change-over switch and the second change-over switch according to the frequency of the base station signal, and adjusting the capacitance value of the variable capacitor according to the frequency of the base station signal so as to match the working frequency of the first antenna with the frequency of the base station signal.
The product can execute the method provided by the embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
The present embodiment also provides a computer-readable storage medium on which a computer program is stored, the program, when executed by a processor, implementing an antenna adjustment method according to an embodiment of the present invention, the method including: acquiring a base station signal; and adjusting the working states of the first change-over switch and the second change-over switch according to the frequency of the base station signal, and adjusting the capacitance value of the variable capacitor according to the frequency of the base station signal so as to match the working frequency of the first antenna with the frequency of the base station signal.
In one embodiment, the computer program when executed by the processor further performs the steps of: when the frequency of the base station signal is greater than a preset frequency threshold value, controlling the first switch to be switched off, and controlling the second switch to be switched on; and when the frequency of the base station signal is less than or equal to the preset frequency threshold, controlling the first change-over switch to be switched on, and switching off the second change-over switch.
In one embodiment, the computer program when executed by the processor further performs the steps of: determining a subdivided wave band to which the base station signal belongs according to the frequency of the base station signal; and adjusting the capacitance value of the variable capacitor to a matching value corresponding to the subdivided wave band.
Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + +, or the like, as well as conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The antenna is characterized by comprising a first antenna and a second antenna which work in different frequency bands, wherein the first antenna comprises a first antenna body, the second antenna comprises a second antenna body, and a preset gap is formed between the first antenna body and the second antenna body; the first antenna further comprises an impedance tuning circuit disposed between the first antenna body and the first antenna feed point; wherein the content of the first and second substances,
the impedance tuning circuit comprises a variable capacitor, a first inductor, a second inductor, a first change-over switch and a second change-over switch, wherein one end of the variable capacitor is connected with the first antenna body through a first branch circuit, and the other end of the variable capacitor is connected with the first antenna feed point through a second branch circuit; one end of the first change-over switch is connected with the first branch circuit, and the other end of the first change-over switch is grounded through the first inductor; one end of the second change-over switch is connected with the second branch circuit, and the other end of the second change-over switch is grounded through the second inductor.
2. The antenna of claim 1, wherein the operating frequency band of the first antenna is 0.6 GHz-2.2 GHz; the working frequency band of the second antenna is 2.3-2.7 GHz.
3. The antenna of claim 1, wherein the antenna comprises a metal part and a plastic part integrally connected, the metal part comprises a first metal part as the first antenna body and a second metal part as the second antenna body, a part of the plastic part covers the metal part, and another part of the plastic part is located at the predetermined gap to form an antenna clearance area.
4. The antenna of claim 1, further comprising a radio frequency device by which the first antenna and the second antenna are signal fused.
5. An antenna adjusting method applied to the antenna according to any one of claims 1 to 4, wherein the antenna adjusting method comprises:
acquiring a base station signal;
and adjusting the working states of the first change-over switch and the second change-over switch according to the frequency of the base station signal, and adjusting the capacitance value of the variable capacitor according to the frequency of the base station signal so as to match the working frequency of the first antenna with the frequency of the base station signal.
6. The method for adjusting the antenna according to claim 5, wherein the adjusting the operating states of the first switch and the second switch according to the frequency of the base station signal comprises:
when the frequency of the base station signal is greater than a preset frequency threshold value, controlling the first switch to be switched off, and controlling the second switch to be switched on;
and when the frequency of the base station signal is less than or equal to a preset frequency threshold value, controlling the first change-over switch to be switched on, and switching off the second change-over switch.
7. The antenna adjusting method according to claim 5, wherein the adjusting the capacitance value of the variable capacitor according to the frequency of the base station signal comprises:
determining a subdivided wave band to which the base station signal belongs according to the frequency of the base station signal;
and adjusting the capacitance value of the variable capacitor to a matching value corresponding to the subdivided waveband.
8. A terminal, characterized in that the terminal is provided with an antenna adjustment antenna according to any of claims 1-4.
9. The terminal of claim 8, wherein the terminal comprises a metal shell and a plastic shell integrally connected, the plastic shell covering the metal shell, and the metal shell comprising the first antenna body and the second antenna body.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the antenna adjustment method according to any one of claims 5-7.
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