And subtracting the power of the P from the power of the. For example, if the signal strength of the bandx signal received by the high-frequency antenna is-78 dBm and the signal strength of the bandx signal received by the low-frequency antenna is-98 dBm, the direct relative isolation between the two antennas is-78 dBm- (-98dBm) ═ 20dB (the unit of the received signal strength is dBm and the unit of the isolation is dB).

The state of the low-frequency antenna tuning circuit corresponding to the value with the maximum isolation is selected, namely the state can ensure the best matching of the isolation of the two antennas when the low-frequency antenna tuning circuit works in band x, and the low-frequency antenna tuning circuit is controlled to be adjusted to the state.

And S203, adjusting the second antenna tuning circuit to a target circuit state, and controlling the adjusted second antenna tuning circuit to tune the frequency of the second antenna.

After the second antenna tuning circuit is adjusted to the target circuit state, the adjusted second antenna tuning circuit can be controlled to perform frequency tuning on the second antenna in the current processing idle state, so that the isolation between the second antenna subjected to frequency tuning and the first antenna is increased, the isolation between the two antennas in the terminal can be improved while the signal transmission efficiency of the current working antenna is not influenced, and the effective radiation efficiency of the current working antenna is effectively improved.

The embodiments described below provide tuning methods for tunable antennas in terminals corresponding to the method embodiments provided above, i.e. the embodiments described below mainly provide a method for tuning a frequency of a first antenna when a second antenna of a terminal operates in a second frequency band. It should be noted that, for the explanation of the related contents in the following embodiments, reference may be made to the above method embodiments, and details are not described here.

As shown in fig. 3, the method comprises the steps of:

s301, acquiring a second initial isolation between the second antenna and the first antenna when the second antenna works in a second frequency band.

S302, determining a target circuit state of a first antenna tuning circuit connected with a first antenna.

For example, after the first antenna tuning circuit performs frequency tuning on the first antenna in the target circuit state, the isolation between the first antenna and the second antenna is greater than the second initial isolation, and the circuit impedances of the first antenna tuning circuit in different circuit states are different.

Illustratively, in determining the target circuit state for the first antenna tuning circuit, the target circuit state may be determined in two ways:

the first implementation mode comprises the following steps: the optimal resonant frequency of the first antenna in the current working frequency band is found out from a preset resonant frequency table, wherein the resonant frequency table comprises the optimal resonant frequency of the first antenna in different working frequency bands and the circuit state of the first antenna tuning circuit corresponding to each optimal resonant frequency.

The second implementation mode comprises the following steps: the first antenna tuning circuit is sequentially adjusted to each circuit state, frequency tuning is carried out on the first antenna, and the circuit state corresponding to the maximum isolation degree between the first antenna and the first antenna after frequency tuning is taken as a target circuit state.

And S303, adjusting the first antenna tuning circuit to a target circuit state, and controlling the adjusted first antenna tuning circuit to tune the frequency of the first antenna.

Through the steps, the isolation between the first antenna and the second antenna which are tuned by frequency can be increased, so that the isolation between the two antennas in the terminal can be improved while the signal transmission efficiency of the current working antenna is not influenced, and the effective radiation efficiency of the current working antenna is effectively improved.

The following describes embodiments of the apparatus provided by embodiments of the present application, which correspond to the embodiments of the method provided above. It should be noted that, for the following explanation of the related contents in the embodiments of the apparatus, reference may be made to the above-mentioned embodiments of the method.

Fig. 4 shows a schematic diagram of a possible structure of the tuning apparatus for a tunable antenna in a terminal according to the above embodiment, and referring to fig. 4, the apparatus includes: an obtainingmodule 41, a determiningmodule 42, and an adjustingmodule 43, wherein:

the obtainingmodule 41 is configured to obtain a first initial isolation between the first antenna and the second antenna when the first antenna operates in the first frequency band.

A determiningmodule 42 for determining a target circuit state of a second antenna tuning circuit connected to the second antenna; the second antenna tuning circuit is used for tuning the frequency of the second antenna in a target circuit state, and then the isolation between the second antenna and the first antenna is larger than the first initial isolation; the second antenna tuning circuit has different circuit impedances in different circuit states.

And an adjustingmodule 43, configured to adjust the second antenna tuning circuit to a target circuit state, and control the adjusted second antenna tuning circuit to perform frequency tuning on the second antenna.

Optionally, the determiningmodule 42 is specifically configured to:

and sequentially adjusting the second antenna tuning circuit to each circuit state, performing frequency tuning on the second antenna, and taking the circuit state corresponding to the maximum isolation between the frequency-tuned second antenna and the first antenna as a target circuit state.

Optionally, the obtainingmodule 41 is specifically configured to:

recording the signal intensity of a first frequency band signal received by a first antenna when the first antenna works in a first frequency band; switching a working antenna of the terminal from a first antenna to a second antenna, and recording the signal intensity of a first frequency band signal received by the second antenna when the second antenna works in a first frequency band; and taking the absolute difference between the signal strength of the first frequency band signal received by the first antenna and the signal strength of the first frequency band signal received by the second antenna as a first initial isolation.

Optionally, the obtainingmodule 41 is further configured to obtain a second initial isolation between the second antenna and the first antenna when the second antenna operates in the second frequency band.

A determiningmodule 42, further configured to determine a target circuit state of a first antenna tuning circuit connected to the first antenna; after the first antenna tuning circuit performs frequency tuning on the first antenna in a target circuit state, the isolation between the first antenna and the second antenna is greater than a second initial isolation; the first antenna tuning circuit has different circuit impedances in different circuit states.

The adjustingmodule 43 is further configured to adjust the first antenna tuning circuit to a target circuit state, and perform frequency tuning on the first antenna.

Further optionally, the determiningmodule 42 is specifically configured to:

and sequentially adjusting the first antenna tuning circuit to each circuit state, respectively tuning the frequency of the first antenna, and taking the circuit state corresponding to the maximum isolation between the frequency-tuned first antenna and the first antenna as a target circuit state.

It should be noted that, in a specific implementation process, each step executed in the method flows shown in fig. 2 and 3 may be implemented by a processor in a hardware form executing a computer execution instruction in a software form stored in a memory, and is not described herein again to avoid repetition. The program corresponding to the action executed by the device can be stored in the memory of the device in a software form, so that the processor can call and execute the operation corresponding to each module. The memory above may include volatile memory (volatile memory), such as random-access memory (RAM); a non-volatile memory (non-volatile memory) such as a read-only memory (ROM), a flash memory (flash memory), a Hard Disk Drive (HDD) or a solid-state drive (SSD); combinations of the above categories of memory may also be included.

The processor in the above-provided apparatus may be a single processor or may be a collective term for a plurality of processing elements. For example, the processor may be a central processing unit (CPU; other general purpose processors, Digital Signal Processor (DSP), Application Specific Integrated Circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, etc.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses and modules may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is merely a logical division, and in actual implementation, there may be other divisions, for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A method for tuning a tunable antenna in a terminal, the terminal comprising at least a first antenna and a second antenna, the method comprising:

adjusting the second antenna tuning circuit to a target circuit state, and controlling the adjusted second antenna tuning circuit to perform frequency tuning on the second antenna;

determining a target circuit state of a second antenna tuning circuit connected to the second antenna, comprising:

sequentially adjusting the second antenna tuning circuit to each circuit state, performing frequency tuning on the second antenna, and taking the circuit state corresponding to the maximum isolation between the frequency-tuned second antenna and the first antenna as a target circuit state;

obtaining a first initial isolation between a first antenna and a second antenna when the first antenna operates in a first frequency band, the method includes:

recording the signal intensity of a first frequency band signal received by the first antenna when the first antenna works in a first frequency band;

switching a working antenna of the terminal from a first antenna to a second antenna, and recording the signal intensity of a first frequency band signal received by the second antenna when the second antenna works in a first frequency band;

and taking an absolute difference value between the signal strength of the first frequency band signal received by the first antenna and the signal strength of the first frequency band signal received by the second antenna as a first initial isolation.

2. The method of claim 1, further comprising:

acquiring a second initial isolation between the second antenna and the first antenna when the second antenna works in a second frequency band;

determining a target circuit state of a first antenna tuning circuit connected to the first antenna; after the first antenna tuning circuit performs frequency tuning on the first antenna in a target circuit state, the isolation between the first antenna and the second antenna is greater than the second initial isolation; the circuit impedance of the first antenna tuning circuit is different under different circuit states;

and adjusting the first antenna tuning circuit to a target circuit state, and tuning the frequency of the first antenna.

3. The method of claim 2, wherein determining a target circuit state for a first antenna tuning circuit connected to the first antenna comprises:

4. An apparatus for tuning a tunable antenna in a terminal, the terminal comprising at least a first antenna and a second antenna, comprising:

the adjusting module is used for adjusting the second antenna tuning circuit to a target circuit state and controlling the adjusted second antenna tuning circuit to tune the frequency of the second antenna;

the determining module is specifically configured to:

the acquisition module is specifically configured to:

5. The apparatus of claim 4, wherein:

the acquisition module is further configured to acquire a second initial isolation between the second antenna and the first antenna when the second antenna operates in a second frequency band;

the determining module is further configured to determine a target circuit state of a first antenna tuning circuit connected to the first antenna; after the first antenna tuning circuit performs frequency tuning on the first antenna in a target circuit state, the isolation between the first antenna and the second antenna is greater than the second initial isolation; the circuit impedance of the first antenna tuning circuit is different under different circuit states;

the adjusting module is further configured to adjust the first antenna tuning circuit to a target circuit state, and perform frequency tuning on the first antenna.

6. The apparatus of claim 5, wherein the determining module is specifically configured to: