CN109039397B - Antenna circuit of mobile terminal, control method and device - Google Patents
Antenna circuit of mobile terminal, control method and device Download PDFInfo
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- CN109039397B CN109039397B CN201810863117.0A CN201810863117A CN109039397B CN 109039397 B CN109039397 B CN 109039397B CN 201810863117 A CN201810863117 A CN 201810863117A CN 109039397 B CN109039397 B CN 109039397B
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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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
- 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
- H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/006—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
Abstract
The invention provides an antenna circuit, a control method and a device of a mobile terminal, wherein the antenna circuit comprises the following components: the antenna comprises at least two antennas, wherein each antenna is connected with an antenna tuner respectively; a radio frequency circuit electrically connected to a first antenna of the at least two antennas; the power detection module is connected with the radio frequency circuit; a receiving path, wherein each second antenna except the first antenna in the at least two antennas is connected to the receiving path through a switch, and each switch is connected with the power detection module; and the controller is respectively connected with the power detection module and the antenna tuner. Therefore, the scheme of the invention solves the problem of poor antenna efficiency caused by low isolation among multiple antennas.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to an antenna circuit, a control method, and an apparatus for a mobile terminal.
Background
At present, the frequency bands required to be supported by mobile phone terminals are continuously increased. Therefore, in order to improve the antenna efficiency, most terminals adopt the sub-antenna technology, thereby increasing the number of antennas. In addition, with the continuous evolution and iteration of communication technology, Multiple-Input Multiple-Output (MIMO) technology is gradually introduced into business, and a terminal supports MIMO technology more in a mainstream trend, from 2X2MIMO to mainstream 4X4MIMO or to next nxn MIMO.
The fixed terminal shape determines that the antenna space is limited, so that a series of problems are caused by dense antenna distribution, for example, the isolation between the MIMO antennas is too low to influence the antenna efficiency, and the worse the isolation between the antennas is, the stronger the mutual absorption capacity of the radiation energy between the antennas is; and if the isolation between the main radio frequency and the WIFI antenna is too low, the coexistence interference problem is caused, and the like, so that the working efficiency of the whole antenna system is influenced.
Disclosure of Invention
The embodiment of the invention provides an antenna circuit, a control method and a control device of a mobile terminal, which aim to solve the problem of poor antenna efficiency caused by too low isolation among multiple antennas.
In a first aspect, an embodiment of the present invention provides an antenna circuit of a mobile terminal, including:
the antenna comprises at least two antennas, wherein each antenna is connected with an antenna tuner respectively;
a radio frequency circuit electrically connected to a first antenna of the at least two antennas;
the power detection module is connected with the radio frequency circuit and used for acquiring the transmitting power when the first antenna transmits signals;
a receiving path, wherein each second antenna of the at least two antennas except the first antenna is connected to the receiving path through a switch, and each switch is connected to the power detection module; the switch includes a first state that communicates the second antenna with the receive path and a second state that communicates the second antenna with the power detection module; when the switch is in the second state, acquiring the receiving power on the second antenna through the power detection module;
and the controller is electrically connected with the power detection module and the antenna tuner respectively, and is used for calculating the isolation between the first antenna and the corresponding second antenna according to the transmitting power of the first antenna and the receiving power of at least one second antenna acquired by the power detection module, and controlling the antenna tuner connected with the first antenna and/or the corresponding second antenna to adjust the circuit impedance according to the isolation.
In a second aspect, an embodiment of the present invention provides a method for controlling an antenna circuit, where the method is applied to the antenna circuit, and the method includes:
outputting a first control signal to a change-over switch on at least one second antenna, and controlling the change-over switch to be in the second state;
and outputting a second control signal to the first antenna to control the first antenna to transmit a signal.
In a third aspect, an embodiment of the present invention provides a control apparatus for an antenna circuit, which is applied to the antenna circuit described above, and the apparatus includes:
the first control module is used for outputting a first control signal to a selector switch on at least one second antenna and controlling the selector switch to be in the second state;
and the second control module is used for outputting a second control signal to the first antenna and controlling the first antenna to transmit a signal.
The embodiment of the invention has the beneficial effects that:
according to the embodiment of the invention, the transmitting power of the first antenna during signal transmitting can be detected through the power detection module, the passage between the second antenna and the power detection module is conducted through controlling each selector switch, so that the receiving power of at least one second antenna during signal receiving is detected through the power detection module, the isolation between the first antenna and the second antenna corresponding to the receiving power is calculated through the controller according to the transmitting power and the receiving power, and the antenna tuner is adjusted according to the isolation. Therefore, the embodiment of the invention can detect the isolation between the first antenna and any one of the second antennas, thereby weakening the mutual influence degree between the first antenna and any one of the second antennas, reducing the mutual interference, and further solving the problem of poor antenna efficiency caused by too low isolation between multiple antennas.
Drawings
Fig. 1 is a schematic circuit diagram of an antenna circuit of a mobile terminal according to an embodiment of the present invention;
FIG. 2 shows a basic signal flow diagram of FIG. 1;
fig. 3 is a second schematic circuit diagram of an antenna circuit of a mobile terminal according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a method for controlling an antenna circuit according to an embodiment of the present invention;
fig. 5 is a block diagram of a mobile terminal according to an embodiment of the present invention;
fig. 6 is a second schematic block diagram of a mobile terminal according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a hardware structure of a mobile terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides an antenna circuit of a mobile terminal, as shown in fig. 1, the antenna circuit of the mobile terminal includes:
the antenna comprises at least two antennas, wherein each antenna is connected with an antenna tuner respectively;
a radio frequency circuit electrically connected to a first antenna 101 of the at least two antennas;
the power detection module is connected with the radio frequency circuit and used for acquiring the transmitting power when the first antenna 101 transmits signals;
a receiving path to which each of the second antennas 102 except for the first antenna 101 of the at least two antennas is connected through a switch, and each of the switches is connected to the power detection module; the switch includes a first state that communicates the second antenna 102 with the receive path and a second state that communicates the second antenna 102 with the power detection module; when the switch is in the second state, acquiring the received power of the second antenna 102 through the power detection module;
and the controller is electrically connected with the power detection module and the antenna tuner respectively, and is used for calculating the isolation between the first antenna and the corresponding second antenna according to the transmitting power of the first antenna and the receiving power of at least one second antenna acquired by the power detection module, and controlling the antenna tuner connected with the first antenna and/or the corresponding second antenna to adjust the circuit impedance according to the isolation.
As can be seen from the above, when the rf circuit transmits a signal, the signal is transmitted from the first antenna 101, and enters the power detection module, so that the power detection module detects the transmission power of the first antenna. The power transmitted by the first antenna 101 is received by the other antennas (i.e. the second antenna 102). When the switch turns on the path between the second antenna 102 and the power detection module, the power detection module can detect the received power of the second antenna 102. The controller calculates the isolation between the first antenna and the second antenna according to the transmitting power of the first antenna and the receiving power of the second antenna.
The path between each second antenna 102 and the power detection module can be sequentially conducted by controlling the switch, so that the embodiment of the invention can detect the isolation between the first antenna and any one of the second antennas, and adjust the antenna tuner according to the isolation to optimize the isolation between the antennas, i.e., weaken the mutual influence between the antennas, and reduce the mutual interference, thereby improving the performance of the antenna system of the mobile terminal and improving the use experience of users.
Further, the controller is configured to calculate an isolation between the first antenna and one of the second antennas according to the following:
ΔP(i)＝Pt-Pr(i)；
where Δ p (i) represents the isolation between the first antenna and the ith second antenna, Pt represents the transmission power of the first antenna, and pr (i) represents the reception power on the ith second antenna.
I.e. the difference between the transmitting power of the first antenna and the receiving power of one of the second antennas, is the isolation between the first antenna and the second antenna.
In addition, in the process that the controller controls the antenna tuner connected to the first antenna and/or the corresponding second antenna to perform circuit impedance adjustment according to the isolation, the controller may specifically be configured to:
and comparing the calculated isolation with a preset threshold value, and controlling the antenna tuner connected with the first antenna and/or the corresponding second antenna to adjust the circuit impedance when the isolation is smaller than the preset threshold value.
That is, when the isolation between the first antenna and any one of the second antennas is smaller than the preset threshold, the controller may control the antenna tuner connected to the first antenna to adjust the circuit impedance, or control the antenna tuner connected to the second antenna to adjust the circuit impedance, or control both the antenna tuner connected to the first antenna and the antenna tuner connected to the second antenna to adjust the circuit impedance.
Each antenna tuner is provided with an independent logic control line, and the adjustment of antenna matching can be realized. And each antenna tuner comprises a capacitance with a variable capacitance value and/or an inductance with a variable inductance value and/or a variable resistance, so that the circuit impedance of the antenna tuning circuit can be adjusted by changing the variable resistance, the capacitance and the inductance, and different circuit states can be realized by different circuit impedances. The antenna radiation directivity and the radiation efficiency are changed due to different circuit impedances, and therefore the isolation between the antennas can be changed by controlling the antenna tuner to adjust the circuit impedance, and the antenna efficiency is improved.
Further, the antenna circuit further includes: and the coupler is arranged on a connecting circuit used for connecting the radio frequency circuit and the power detection module.
Further, the antenna circuit further includes:
the control switch comprises a plurality of input ends, output ends and a connecting switch, the input ends are respectively connected with the coupler and the change-over switches of the second antennas in a one-to-one correspondence mode, the output ends are connected with the power detection module, and the connecting switch can switch between states of enabling the output ends to be connected with any input ends.
That is, as shown in fig. 1, the control switch 103 may control the on and off of the path between the coupler and the power detection module, and the on and off of the path between the switch of each second antenna and the power detection module, respectively.
Therefore, when the control switch conducts a path between the coupler and the power detection module, the power detection module can obtain the transmission power when the first antenna transmits the signal; when the switch of any one of the second antennas is in the second state and the control switch turns on the path between the switch and the power detection module, the power detection module may obtain the received power on the second antenna.
Therefore, the setting of the control switch enables the connecting circuit needing power detection to be respectively conducted with the power detection module, so that the power detection module can only comprise one unit circuit with the power detection function, the circuit structure of the embodiment of the invention is simplified, and the arrangement space on the mobile terminal is saved.
In addition, when the antenna circuit further includes a coupler and a control switch, a flow chart of signals of the antenna circuit is shown in fig. 2. A part of a main radio frequency signal emitted by the radio frequency circuit is processed into a coupling signal by the coupler, and the coupling signal enters the power detection module and is subjected to power detection by the power detection module; the other part of the main radio frequency signal emitted by the radio frequency circuit enters the first antenna as a radio frequency signal and is radiated by the first antenna. The signal radiated by the first antenna is received by the 1 st to the n th second antennas, and then enters the power detection module through the 1 st to the n th change-over switches and the control switch, and is detected by the power detection module. Therefore, the isolation between the first antenna and any one of the second antennas is judged according to the power value detected by the power detection module, and the antenna tuner is further adjusted according to the isolation.
Further, the controller is further configured to calculate the transmit power of the first antenna according to:
Pt＝P1+W1+K-W2；
wherein Pt denotes a transmission power of the first antenna, P1 denotes a power value detected by the power detection module when a path between the coupler and the power detection module is turned on, W1 denotes a loss power of the control switch, K denotes a coupling coefficient of the coupler, and W2 denotes a loss power of the coupler to a feed point of the first antenna.
Wherein the power loss of the control switch and the power loss of the coupler to the feed point of the first antenna are determined in advance by relevant experimental data.
Further, the controller is further configured to calculate the received power on one of the second antennas according to the following:
Pr(i)＝P2(i)+W3(i)；
wherein pr (i) represents the received power of the ith second antenna, P2(i) represents the power value detected by the power detection module when the path between the ith second antenna and the power detection module is turned on, and W3(i) represents the power loss of the power detection module to the feed point of the ith second antenna.
And the loss power of the power detection module to the feed point of each second antenna is determined in advance through relevant experimental data.
Preferably, as shown in fig. 3, the antenna circuit further includes:
a radio frequency path changeover switch provided on a connection circuit for connecting the first antenna and the radio frequency circuit and a connection circuit for connecting the second antenna and the changeover switch; wherein the radio frequency path switch is configured to connect one of the at least two antennas to the radio frequency circuit. Specifically, the rf path switch may be a double-pole double-throw (DPDT) switch, and the DPDT switch is disposed on a connection circuit from the first antenna to the rf circuit and a connection circuit from one second antenna to the corresponding switch.
As shown in fig. 3, the rf path switch includes an input terminal connected to the first antenna and the at least one second antenna, an output terminal connected to the rf circuit and the at least one switch, and a toggle switch for connecting the input terminal to the corresponding output terminal. In fig. 3, the rf path switch 104 may conduct a path between the first antenna 101 and one of the switches connected to the rf path switch 104, and conduct a path between one of the second antennas 102 connected to the rf path switch 104 and the rf circuit. That is, in the process of performing the isolation detection, one of the second antennas 102 connected to the rf path switching switch 104 is used as a transmitting antenna, and the first antenna 101 is used as a receiving antenna.
Therefore, when the isolation detection is performed, one antenna can be arbitrarily selected from all antennas included in the antenna circuit as a transmitting antenna and the others as receiving antennas by controlling the rf path changeover switch 104, so that the isolation between the transmitting antenna and any one receiving antenna can be obtained. Therefore, the setting of the radio frequency path switch 104 can detect not only the isolation between the first antenna and each second antenna, but also the isolation between any two second antennas, that is, the setting of the radio frequency path switch 104, so that the embodiment of the present invention can detect the isolation between any two antennas in all antennas included in the antenna circuit.
It should be noted that, when the antenna circuit includes the above-mentioned rf path switch, the first antenna originally used as a transmitting antenna may also require a receiving power, and if the antenna circuit further includes a coupler disposed on a connection circuit from the rf circuit to the power detection module, the coupler is required to be a bidirectional coupler.
In summary, in the embodiments of the present invention, the power detection module may detect the transmission power when the first antenna transmits a signal, and the switches are controlled to turn on the paths between the second antennas and the power detection module, so that the power detection module detects the received power when at least one second antenna receives a signal, and the controller calculates the isolation between the first antenna and the second antenna corresponding to the received power according to the transmission power and the received power, and then adjusts the antenna tuner according to the isolation. Therefore, the embodiment of the invention can detect the isolation between the first antenna and any one of the second antennas, thereby weakening the mutual influence degree between the first antenna and any one of the second antennas, reducing the mutual interference, and further solving the problem of poor antenna efficiency caused by too low isolation between multiple antennas.
An embodiment of the present invention further provides a control method of an antenna circuit, which is applied to the antenna circuit described above, and as shown in fig. 4, the method includes:
step 401: and outputting a first control signal to a change-over switch on at least one second antenna to control the change-over switch to be in the second state.
When the change-over switch is in the second state, the path between the second antenna connected with the change-over switch and the power detection module is conducted.
Step 402: and outputting a second control signal to the first antenna to control the first antenna to transmit a signal.
When the first antenna transmits a signal, the power detection module may detect the transmission power of the first antenna. In addition, after the second antenna connected to the switch in the second state receives the power transmitted by the first antenna, the power detection module may be used to receive the power on the second antenna.
After the transmitting power of the first antenna and the receiving power of the second antenna are obtained, the isolation between the first antenna and the second antenna can be calculated through a controller in the antenna circuit, so that the antenna tuner connected with the first antenna and/or the corresponding second antenna is controlled to adjust the circuit impedance according to the isolation.
Therefore, when the control method of the antenna circuit of the embodiment of the invention is applied to the antenna circuit, the isolation between the first antenna and any one of the second antennas can be detected, so that the degree of mutual influence between the first antenna and any one of the second antennas is weakened, the mutual interference is reduced, and the problem of poor antenna efficiency caused by too low isolation between multiple antennas is solved.
Preferably, before the step of outputting the first control signal to the switch on at least one of the second antennas, the method further comprises:
and detecting whether the mobile terminal is in a preset working mode, and executing the step of outputting a first control signal to a change-over switch on at least one second antenna to control the change-over switch to be in the second state when the mobile terminal is in the preset working mode.
That is, the control method of the antenna circuit according to the embodiment of the present invention is not executed when the mobile terminal is in the preset operation mode, and the control method of the antenna circuit according to the embodiment of the present invention is not executed when the mobile terminal is not in the preset operation mode.
Further, the detecting whether the mobile terminal is in the preset working mode includes:
detecting whether the mobile terminal is in a multiple-input multiple-output (MIMO) mode;
or
And detecting whether a main radio frequency antenna and a WIFI antenna of the mobile terminal simultaneously work in adjacent frequency bands.
Namely, the preset working mode is an MIMO mode or a mode in which the main radio frequency antenna and the WIFI antenna simultaneously work in adjacent frequency bands.
When the mobile terminal operates in a normal mode (i.e., a non-MIMO mode) or the external base station environment does not support the MIMO terminal, the mobile terminal is configured to use the default antenna setting, that is, the number of radio frequency paths enabled by the radio frequency module of the mobile terminal is small, and the number of operating antennas is also small. When the mobile terminal enters an environment supporting MIMO technical communication and the mobile terminal itself also enters an MIMO mode, the isolation between MIMO multiple antennas is required, so that the control method of the antenna circuit of the embodiment of the invention can be used for firstly detecting the isolation between the antennas at the moment and further judging whether the antenna tuner needs to be adjusted to optimize the isolation between the antennas, thereby reducing the coherence between the antennas and weakening the influence between the antennas.
In addition, when the main radio frequency module of the mobile terminal works in an LTE B40 high channel (2.3G-2.4G), the mobile terminal is also connected with 2.4G WIFI (2.4G-2.4835 GHz) at the moment and is registered in a WIFI low channel; or when the WIFI of the mobile terminal needs to be used as a hotspot, the working frequency bands of the main radio frequency antenna and the WIFI antenna are close to each other, and the main radio frequency antenna and the WIFI antenna have large interference, so that the user experience is seriously influenced. And because of the space limitation of the mobile terminal, the antenna debugging is the efficiency of the main radio frequency antenna or the WIFI antenna, and the isolation between the two antennas is difficult to be greatly increased, so that the isolation needs to be increased under a specific use environment, and mutual interference is avoided. Therefore, when the main radio-frequency antenna and the WIFI antenna work in adjacent frequency bands simultaneously, the control method of the antenna circuit provided by the embodiment of the invention can be used for detecting the isolation between the main radio-frequency antenna and the WIFI antenna, so that the mutual influence degree between the main radio-frequency antenna and the WIFI antenna is weakened, the mutual interference is reduced, and the problem of poor antenna efficiency caused by too low isolation between the multiple main radio-frequency antennas and the WIFI antenna is solved.
Further, the step of outputting a first control signal to a switch on at least one of the second antennas to control the switch to assume the second state includes: and outputting a first control signal to a change-over switch on the WIFI antenna, and controlling the change-over switch on the WIFI antenna to be in the second state.
Further, the step of outputting a second control signal to the first antenna to control the first antenna to transmit a signal includes: and outputting a second control signal to the main radio frequency antenna to control the main radio frequency antenna to transmit a signal.
Namely, when the main radio frequency antenna and the WIFI antenna of the mobile terminal work at adjacent frequency bands simultaneously, the transmission power of the main radio frequency antenna can be controlled, and the power is received by the WIFI antenna, so that the isolation detection is carried out.
Specifically, for example, the first antenna in fig. 1 is a main rf antenna, and one of the second antennas is a WIFI antenna. Transmitting power or a specific signal through the main radio frequency circuit, so that the power detection module detects the power value P1 through the coupler; meanwhile, radio frequency energy is synchronously received by the WIFI antenna through spatial radiation, at the moment, the switch is controlled to switch the channel to power detection, and the power value P2 is detected by the power detection module, so that the transmitting power of the main radio frequency antenna and the receiving power of the WIFI antenna are obtained according to P1, P2, a calculation formula of the transmitting power and a calculation formula of the receiving power, and further the isolation between the main radio frequency antenna and the WIFI antenna (namely the difference between the transmitting power of the main radio frequency antenna and the receiving power of the WIFI antenna) is obtained. And then, judging whether the isolation degree at the moment meets a preset threshold value, if not, adjusting an antenna tuner of the main radio frequency antenna and/or the WIFI antenna, and optimizing the isolation degree between the two antennas.
Furthermore, preferably, the step of outputting a first control signal to a switch on at least one of the second antennas to control the switch to assume the second state includes:
and outputting a first control signal to a change-over switch on the main radio-frequency antenna, and controlling the change-over switch on the main radio-frequency antenna to be in the second state.
Preferably, the step of outputting the second control signal to the first antenna and controlling the first antenna to transmit the signal includes:
and outputting a second control signal to the WIFI antenna to control the WIFI antenna to transmit a signal.
Namely, when the main radio frequency antenna and the WIFI antenna of the mobile terminal work at adjacent frequency bands simultaneously, the transmitting power of the WIFI antenna can be controlled, and the main radio frequency antenna receives power, so that isolation detection is carried out.
An embodiment of the present invention further provides a control device of an antenna circuit, which is applied to the above-mentioned antenna circuit, as shown in fig. 5, the control device 500 of the antenna circuit includes:
a first control module 502, configured to output a first control signal to a switch on at least one of the second antennas, so as to control the switch to be in the second state;
the second control module 503 is configured to output a second control signal to the first antenna, and control the first antenna to transmit a signal.
Preferably, as shown in fig. 6, the apparatus further comprises:
the working mode detecting module 501 is configured to detect whether the mobile terminal is in a preset working mode, and when the mobile terminal is in the preset working mode, trigger the first control module to output a first control signal to a switch on at least one of the second antennas, so as to control the switch to be in the second state.
Preferably, as shown in fig. 6, the operation mode detection module 501 includes:
a first detecting unit 5011, configured to detect whether the mobile terminal is in a multiple-input multiple-output, MIMO, mode;
or
The second detection unit 5012 is configured to detect whether the main rf antenna and the WIFI antenna of the mobile terminal simultaneously operate in adjacent frequency bands.
Preferably, as shown in fig. 6, the first control module 502 includes:
the first control unit 5021 is configured to output a first control signal to a switch on the WIFI antenna, and control the switch on the WIFI antenna to be in the second state.
Preferably, as shown in fig. 6, the second control module 503 includes:
a second control unit 5031, configured to output a second control signal to the main rf antenna to control the main rf antenna to transmit a signal.
Preferably, as shown in fig. 6, the first control module 502 includes:
the third control unit 5022 is configured to output a first control signal to a switch on the main rf antenna, and control the switch on the main rf antenna to be in the second state.
Preferably, as shown in fig. 6, the second control module 503 includes:
a fourth control unit 5032, configured to output a second control signal to the WIFI antenna, and control the WIFI antenna to transmit a signal.
As can be seen from the above, in the embodiments of the present invention, a first antenna of an antenna circuit can be controlled to transmit a signal, so that the power detection module detects the transmission power of the first antenna, and controls the conduction of a path between at least one second antenna and the power detection module, so that the power detection module detects the reception power of the second antenna, and then the controller calculates the isolation between the first antenna and the second antenna corresponding to the reception power according to the transmission power and the reception power, and further adjusts the antenna tuner according to the isolation. Therefore, the embodiment of the invention can detect the isolation between the first antenna and any one of the second antennas, thereby weakening the mutual influence degree between the first antenna and any one of the second antennas, reducing the mutual interference, and further solving the problem of poor antenna efficiency caused by too low isolation between multiple antennas.
An embodiment of the present invention further provides a mobile terminal, as shown in fig. 7, where the mobile terminal 700 includes but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, a processor 710, a power supply 711, and the like. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 7 is not intended to be limiting of mobile terminals, and that a mobile terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the mobile terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.
The mobile terminal 700 further includes the antenna circuit 712. The processor 710 is configured to output a first control signal to a switch on at least one of the second antennas of the antenna circuit 712, and control the switch to assume the second state; and outputting a second control signal to the first antenna of the antenna circuit 712 to control the first antenna to transmit a signal.
Therefore, in the mobile terminal 700 according to the embodiment of the present invention, the processor 710 controls the first antenna of the antenna circuit to transmit a signal, so as to detect the transmission power of the first antenna through the power detection module, and control the conduction of the path between the at least one second antenna and the power detection module, so as to detect the reception power of the second antenna through the power detection module, and further calculate the isolation between the first antenna and the second antenna corresponding to the reception power according to the transmission power and the reception power through the controller, so as to adjust the antenna tuner according to the isolation. Therefore, the embodiment of the invention can detect the isolation between the first antenna and any one of the second antennas, thereby weakening the mutual influence degree between the first antenna and any one of the second antennas, reducing the mutual interference, and further solving the problem of poor antenna efficiency caused by too low isolation between multiple antennas.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 701 may be used for receiving and sending signals during a message transmission and reception process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 710; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 701 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 701 may also communicate with a network and other devices through a wireless communication system.
The mobile terminal provides the user with wireless broadband internet access via the network module 702, such as helping the user send and receive e-mails, browse web pages, and access streaming media.
The audio output unit 703 may convert audio data received by the radio frequency unit 701 or the network module 702 or stored in the memory 709 into an audio signal and output as sound. Also, the audio output unit 703 may also provide audio output related to a specific function performed by the mobile terminal 700 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 703 includes a speaker, a buzzer, a receiver, and the like.
The input unit 704 is used to receive audio or video signals. The input Unit 704 may include a Graphics Processing Unit (GPU) 7041 and a microphone 7042, and the Graphics processor 7041 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 706. The image frames processed by the graphic processor 7041 may be stored in the memory 709 (or other storage medium) or transmitted via the radio unit 701 or the network module 702. The microphone 7042 may receive sounds and may be capable of processing such sounds into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 701 in case of a phone call mode.
The mobile terminal 700 also includes at least one sensor 705, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 7061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 7061 and/or a backlight when the mobile terminal 700 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of the mobile terminal (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), and vibration identification related functions (such as pedometer, tapping); the sensors 705 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.
The display unit 706 is used to display information input by the user or information provided to the user. The Display unit 706 may include a Display panel 7061, and the Display panel 7061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 707 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 707 includes a touch panel 7071 and other input devices 7072. The touch panel 7071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 7071 (e.g., operations by a user on or near the touch panel 7071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 7071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 710, receives a command from the processor 710, and executes the command. In addition, the touch panel 7071 can be implemented by various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 707 may include other input devices 7072 in addition to the touch panel 7071. In particular, the other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein again.
Further, the touch panel 7071 may be overlaid on the display panel 7061, and when the touch panel 7071 detects a touch operation on or near the touch panel 7071, the touch operation is transmitted to the processor 710 to determine the type of the touch event, and then the processor 710 provides a corresponding visual output on the display panel 7061 according to the type of the touch event. Although the touch panel 7071 and the display panel 7061 are shown in fig. 7 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 7071 and the display panel 7061 may be integrated to implement the input and output functions of the mobile terminal, which is not limited herein.
The interface unit 708 is an interface through which an external device is connected to the mobile terminal 700. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 708 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 700 or may be used to transmit data between the mobile terminal 700 and external devices.
The memory 709 may be used to store software programs as well as various data. The memory 709 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 709 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 710 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 709 and calling data stored in the memory 709, thereby integrally monitoring the mobile terminal. Processor 710 may include one or more processing units; preferably, the processor 710 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 710.
The mobile terminal 700 may also include a power supply 711 (e.g., a battery) for powering the various components, and the power supply 711 may be logically coupled to the processor 710 via a power management system that may enable managing charging, discharging, and power consumption by the power management system.
In addition, the mobile terminal 700 includes some functional modules that are not shown, and thus will not be described in detail herein.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the above-mentioned control method for an antenna circuit, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (17)
1. An antenna circuit of a mobile terminal, comprising:
the antenna comprises at least two antennas, wherein each antenna is connected with an antenna tuner respectively;
a radio frequency circuit electrically connected to a first antenna of the at least two antennas;
the power detection module is connected with the radio frequency circuit and used for acquiring the transmitting power when the first antenna transmits signals;
a receiving path, wherein each second antenna of the at least two antennas except the first antenna is connected to the receiving path through a switch, and each switch is connected to the power detection module; the switch includes a first state that communicates the second antenna with the receive path and a second state that communicates the second antenna with the power detection module; when the switch is in the second state, acquiring the receiving power on the second antenna through the power detection module;
the controller is electrically connected with the power detection module and the antenna tuner respectively, and is used for calculating the isolation between the first antenna and the corresponding second antenna according to the transmitting power of the first antenna and the receiving power of at least one second antenna acquired by the power detection module, and controlling the antenna tuner connected with the first antenna and/or the corresponding second antenna to adjust the circuit impedance according to the isolation;
the antenna circuit further includes:
the coupler is arranged on a connecting circuit used for connecting the radio frequency circuit and the power detection module;
the antenna circuit further includes:
the control switch comprises a plurality of input ends, output ends and connecting switches, the input ends are respectively connected with the coupler and the selector switch of each second antenna in a one-to-one correspondence mode, the output ends are connected with the power detection module, and the connecting switches can be switched between states of enabling the output ends to be connected with any one of the input ends;
the controller is further configured to calculate a transmit power of the first antenna according to:
Pt＝P1+W1+K-W2；
wherein Pt denotes a transmission power of the first antenna, P1 denotes a power value detected by the power detection module when a path between the coupler and the power detection module is turned on, W1 denotes a loss power of the control switch, K denotes a coupling coefficient of the coupler, and W2 denotes a loss power of the coupler to a feed point of the first antenna;
the controller is further configured to calculate a received power on one of the second antennas according to:
Pr(i)＝P2(i)+W3(i)；
wherein pr (i) represents the received power of the ith second antenna, P2(i) represents the power value detected by the power detection module when the path between the ith second antenna and the power detection module is turned on, and W3(i) represents the power loss of the power detection module to the feed point of the ith second antenna.
2. The antenna circuit of claim 1, further comprising:
a radio frequency path changeover switch provided on a connection circuit for connecting the first antenna and the radio frequency circuit and a connection circuit for connecting the second antenna and the changeover switch;
wherein the radio frequency path switch is configured to connect one of the at least two antennas to the radio frequency circuit.
3. The antenna circuit of claim 1, wherein the controller is configured to calculate the isolation between the first antenna and one of the second antennas according to:
ΔP(i)＝Pt-Pr(i)；
where Δ p (i) represents the isolation between the first antenna and the ith second antenna, Pt represents the transmission power of the first antenna, and pr (i) represents the reception power on the ith second antenna.
4. A method for controlling an antenna circuit, the method being applied to the antenna circuit of any one of claims 1 to 3, the method comprising:
outputting a first control signal to a change-over switch on at least one second antenna, and controlling the change-over switch to be in the second state;
and outputting a second control signal to the first antenna to control the first antenna to transmit a signal.
5. The method of claim 4, wherein prior to the step of outputting the first control signal to the switch on the at least one second antenna, the method further comprises:
and detecting whether the mobile terminal is in a preset working mode, and executing the step of outputting a first control signal to a change-over switch on at least one second antenna to control the change-over switch to be in the second state when the mobile terminal is in the preset working mode.
6. The method according to claim 5, wherein the detecting whether the mobile terminal is in the preset operation mode comprises:
detecting whether the mobile terminal is in a multiple-input multiple-output (MIMO) mode;
or
And detecting whether a main radio frequency antenna and a WIFI antenna of the mobile terminal simultaneously work in adjacent frequency bands.
7. The method of claim 6, wherein the step of outputting a first control signal to a switch on at least one of the second antennas to control the switch to assume the second state comprises:
and outputting a first control signal to a change-over switch on the WIFI antenna, and controlling the change-over switch on the WIFI antenna to be in the second state.
8. The method of claim 7, wherein the step of outputting the second control signal to the first antenna to control the first antenna to transmit signals comprises:
and outputting a second control signal to the main radio frequency antenna to control the main radio frequency antenna to transmit a signal.
9. The method of claim 6, wherein the step of outputting a first control signal to a switch on at least one of the second antennas to control the switch to assume the second state comprises:
and outputting a first control signal to a change-over switch on the main radio-frequency antenna, and controlling the change-over switch on the main radio-frequency antenna to be in the second state.
10. The method of claim 9, wherein the step of outputting the second control signal to the first antenna to control the first antenna to transmit signals comprises:
and outputting a second control signal to the WIFI antenna to control the WIFI antenna to transmit a signal.
11. A control device for an antenna circuit, applied to the antenna circuit according to any one of claims 1 to 3, the device comprising:
the first control module is used for outputting a first control signal to a selector switch on at least one second antenna and controlling the selector switch to be in the second state;
and the second control module is used for outputting a second control signal to the first antenna and controlling the first antenna to transmit a signal.
12. The apparatus of claim 11, further comprising:
and the working mode detection module is used for detecting whether the mobile terminal is in a preset working mode or not, and triggering the first control module to output a first control signal to at least one change-over switch on the second antenna when the mobile terminal is in the preset working mode, so as to control the change-over switch to be in the second state.
13. The apparatus of claim 12, wherein the operating mode detection module comprises:
a first detecting unit, configured to detect whether the mobile terminal is in a MIMO mode; or
And the second detection unit is used for detecting whether the main radio frequency antenna and the WIFI antenna of the mobile terminal simultaneously work in adjacent frequency bands.
14. The apparatus of claim 13, wherein the first control module comprises:
and the first control unit is used for outputting a first control signal to the change-over switch on the WIFI antenna and controlling the change-over switch on the WIFI antenna to be in the second state.
15. The apparatus of claim 14, wherein the second control module comprises:
and the second control unit is used for outputting a second control signal to the main radio-frequency antenna and controlling the main radio-frequency antenna to transmit a signal.
16. The apparatus of claim 14, wherein the first control module comprises:
and the third control unit is used for outputting a first control signal to the change-over switch on the main radio-frequency antenna and controlling the change-over switch on the main radio-frequency antenna to be in the second state.
17. The apparatus of claim 16, wherein the second control module comprises:
and the fourth control unit is used for outputting a second control signal to the WIFI antenna and controlling the WIFI antenna to transmit a signal.
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| CN201810863117.0A CN109039397B (en) | 2018-08-01 | 2018-08-01 | Antenna circuit of mobile terminal, control method and device |
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