CN111697979B

CN111697979B - Mobile terminal

Info

Publication number: CN111697979B
Application number: CN202010614101.3A
Authority: CN
Inventors: 赵鑫
Original assignee: Guangdong Hongqin Communication Technology Co Ltd
Current assignee: Guangdong Hongqin Communication Technology Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-12-17
Anticipated expiration: 2040-06-30
Also published as: CN111697979A

Abstract

The invention discloses a mobile terminal, comprising: the antenna comprises a processor, a switch unit, a first signal channel, a second signal channel and an antenna unit; the processor is used for outputting a control signal to the switch unit according to the detected first signal intensity; the switch unit is used for switching on the first signal channel and switching off the second signal channel when receiving a first control signal of the processor; when a second control signal of the processor is received, closing the first signal channel and conducting the second signal channel; the antenna unit is communicated with the first signal channel and the second signal channel and is used for transmitting the first signal or the second signal. According to the invention, the states of the first signal channel and the second signal channel are changed by the switch unit according to the control signal of the processor, so that the first signal transmission data can be switched to the second signal transmission data when the first signal transmission data can not meet the requirement, and the fluency of the data to be transmitted and the efficiency of data transmission are improved.

Description

Mobile terminal

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a mobile terminal.

Background

Data transmission through WIFI is the current cell-phone, the indispensable function of flat board, but often can meet the card pause when using WIFI display to throw the screen wirelessly when specific application, and same frequency WIFI interference, channel crosstalk, external interference source scheduling problem all can cause WIFI display card pause, influence user's result of use. The current solutions are as follows:

1. hardware level:

a. the overall radiation performance of the WIFI antenna is optimized, and the uplink radiation capability of the terminal is improved.

b. And the WIFI impedance power supply and the conduction index are optimized, and the error and the conduction power of an EVM (error Vector Magnitude) are improved.

2. Software layer:

a. and the WIFI frequency hopping technology is used, so that interference channels are avoided.

b. Through reasonable power back-off, the EVM and the transmission quality are improved.

c. The low-order modulation mode is used, and the demodulation is easy.

According to the scheme, the problem that data are transmitted through WIFI in a stuck mode cannot be solved through measures of software and hardware levels due to the limitation of hardware design and the external radio environment of an application scene. With the popularization of 4K high-definition video, a low-order modulation method cannot be adopted to transmit the high-definition video in the future.

Disclosure of Invention

The embodiment of the application provides a terminal, which is used for solving the problem of blockage in the data transmission process.

In a first aspect, an embodiment of the present application provides a terminal, including: the antenna comprises a processor, a switch unit, a first signal channel, a second signal channel and an antenna unit;

the processor is used for outputting a control signal to the switch unit according to the detected first signal intensity;

the switch unit is used for switching on the first signal channel and switching off the second signal channel when receiving a first control signal of the processor; when a second control signal of the processor is received, closing the first signal channel and conducting the second signal channel;

the first signal channel is used for adjusting a signal to be transmitted into a first signal;

the second signal channel is used for adjusting the signal to be transmitted into a second signal;

the antenna unit is communicated with the first signal channel and the second signal channel and is used for transmitting the first signal or the second signal.

According to the scheme, the states of the first signal channel and the second signal channel are changed through the switch unit according to the control signal of the processor, so that the first signal transmission data can not meet the requirement and can be switched to the second signal transmission data, and the fluency of the data to be transmitted and the efficiency of data transmission are improved.

In one possible design, the first signal is a WiFi signal and the second signal is a UWB signal.

According to the scheme, when the WIFI signal transmission is blocked, the WIFI signal is switched to the UWB signal to continue transmission, and the fluency of the data to be transmitted and the data transmission efficiency are improved.

In one possible design, the antenna element is a single antenna; the first signal or the second signal is transmitted through a single antenna;

the control end of the switch unit is connected with the processor; a first input end of the switch unit is connected with the first signal channel; a second input end of the switch unit is connected with the second signal channel; the output end of the switch unit is connected with the antenna.

According to the scheme, the first signal or the second signal is transmitted through the single antenna, the switch unit directly selects the first signal or the second signal modulated by the signal to be transmitted, the second signal is switched to transmit data when the first signal transmission data cannot meet the requirement, and the fluency of the data to be transmitted and the data transmission efficiency are improved.

In one possible design, a power amplifier is further included between the second signal path and the switching unit; the power amplifier is used for amplifying the second signal, wherein the frequency spectrum corresponding to the second signal is 6240-6999 MHz.

According to the scheme, the second signal is subjected to amplification pretreatment, namely, the 6240MHz-6999MHz signal is subjected to pre-amplification, so that the influence on signal attenuation is compensated, and the conduction power is improved.

In one possible design, the antenna element is a dual antenna; the dual antenna comprises a first antenna and a second antenna;

the control end of the switch unit is connected with the processor; the input end of the switch unit is connected with the signal to be transmitted; a first output end of the switch unit is connected with the first signal channel; a second output end of the switch unit is connected with the second signal channel;

the first signal path is connected with a first antenna in the dual antenna;

the second signal path is connected to a second antenna of the dual antennas.

According to the scheme, the first signal and the second signal are respectively transmitted through the double antennas, the switch unit sends the signal to be transmitted into the first signal transmission channel or the second signal transmission channel, the second signal transmission data are switched when the first signal transmission data cannot meet the requirement, and the fluency of the data to be transmitted and the data transmission efficiency are improved.

In one possible design, a power amplifier is further included between the second signal path and the second antenna; the power amplifier is used for amplifying the second signal, wherein the frequency spectrum corresponding to the second signal is 6240-6999 MHz.

In one possible design, the first signal path and the second signal path share a local oscillator.

By the scheme, the WIFI and the UWB are integrated, compatible and improved, and a crystal is saved by the single PRF design.

In one possible design, the power amplifier has a shorting switch;

the short-circuit switch is used for being disconnected when the second signal channel outputs a second signal with 6240-6999MHz spectrum; and the second signal channel is conducted when outputting a second signal with the frequency spectrum of non-6240-6999 MHz.

According to the scheme, signals of 6240MHz-6999MHz are pre-amplified through the design of the short-circuit switch, so that the influence on signal attenuation is compensated, and the conduction power is improved.

In one possible design, the power amplifier employs dc splitting technology in a vertical cascade configuration.

According to the scheme, the power consumption of the circuit is reduced by adopting a direct current separation technology, an effective ground path is provided for DC bias voltage, and a direct current signal is prevented from entering a back-end circuit.

In one possible design, the power amplifier comprises a first RC circuit, a first transistor, a blocking capacitor, a second transistor and a second RC circuit which are sequentially connected in series from a signal input end to a signal output end;

the first transistor and the second transistor are field effect transistors;

the first RC circuit is used for converting a first signal input by the signal input end into a second signal;

the second RC circuit is used for converting the second signal into a third signal;

the signal output end is used for outputting a third signal;

the blocking capacitor is used for filtering a direct current signal in the second signal.

According to the scheme, aiming at the problem of large insertion loss caused by compatible design, the UWB signal amplification can be realized, and simultaneously, the power consumption is reduced and the generation of intermodulation of the frequency mixer due to direct current input is prevented.

Drawings

Fig. 1 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 2 is a schematic diagram of a terminal according to an embodiment of the present application;

fig. 3 is a schematic diagram of a terminal according to an embodiment of the present application;

FIG. 4 is a block diagram of a UWB uplink modulation link provided by an embodiment of the present application;

fig. 5 is a block diagram of a WIFI uplink modulation link provided in the embodiment of the present application;

fig. 6 is a schematic diagram of a terminal according to an embodiment of the present application;

fig. 7 is a schematic diagram of a terminal according to an embodiment of the present application;

fig. 8 is a schematic diagram of a field effect transistor of a terminal according to an embodiment of the present disclosure;

fig. 9 is a schematic diagram of a field effect transistor of a terminal according to an embodiment of the present application;

fig. 10 is a schematic diagram of a power amplifier of a terminal according to an embodiment of the present disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. 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.

First, some terms in the present application are explained so as to be understood by those skilled in the art.

In the present application, a plurality means two or more; in the description of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, nor order.

The terminal provided in the embodiment of the present application may include a mobile phone, a tablet computer, a desktop, a laptop, a notebook, an ultra-mobile personal computer (UMPC), a handheld computer, a netbook, a Personal Digital Assistant (PDA), a wearable electronic device, a virtual reality device, and other electronic devices, which are not limited in any way in the embodiment of the present application.

UWB, Ultra Wideband technology.

Fig. 1 shows an internal structure of a terminal 100 (hereinafter, referred to as a terminal 100) provided in the present application.

As shown in fig. 1, the terminal 100 may include therein: a processor 101, a switch unit 102, a first signal channel 103, a second signal channel 104 and an antenna unit 105;

a processor 101 for outputting a control signal to the switching unit according to the detected first signal strength;

for example, when the signal strength of the first signal is lower than the threshold, the processor outputs a control signal to the switch unit.

The switch unit 102 is configured to, when receiving a first control signal of the processor, turn on the first signal channel and turn off the second signal channel; when a second control signal of the processor is received, closing the first signal channel and conducting the second signal channel;

in one possible embodiment, the first control signal may be high level, and the second control signal may be low level.

For example, when the switch unit receives a high level, the switch unit turns on the first signal channel and turns off the second signal channel; and when receiving the low level, closing the first signal channel and conducting the second signal channel.

The first signal channel 103 is used for adjusting a signal to be transmitted into a first signal;

the second signal channel 104 is used for adjusting a signal to be transmitted into a second signal;

it should be noted that the signal to be transmitted is a baseband signal.

The antenna unit 105 is in communication with the first signal path 103 and the second signal path 104, and is configured to transmit the first signal or the second signal.

In one possible embodiment, the antenna unit is a single antenna; the first signal or the second signal is transmitted through a single antenna;

the control end of the switch unit is connected with the processor; the first input end of the switch unit is connected with the first signal channel; the second input end of the switch unit is connected with the second signal channel; the output end of the switch unit is connected with the antenna.

In the embodiment of the present application, as shown in fig. 2, a pulse repetition frequency (prf) is sent from a local oscillator, and is modulated by a modulator of a first signal path and a modulator of a second signal path, and then reaches an antenna unit through a switch unit.

In another possible embodiment, the antenna unit is a dual antenna; the dual antenna comprises a first antenna and a second antenna;

the control end of the switch unit is connected with the processor; the input end of the switch unit is connected with a signal to be transmitted; the first output end of the switch unit is connected with the first signal channel; the second output end of the switch unit is connected with the second signal channel;

the first signal channel is connected with a first antenna in the double antennas;

the second signal path is connected to a second antenna of the dual antennas.

In the embodiment of the present application, as shown in fig. 3, a signal to be transmitted enters the first signal channel or the second signal channel through the switch unit, the PRF pulse repetition frequency is sent by the local oscillator, and the signal to be transmitted reaches the antenna unit after being modulated by the modulator of the first signal channel or the modulator of the second signal channel.

In the embodiment of the present application, the first signal path and the second signal path share a local oscillator.

In one possible embodiment, the first signal is a WiFi signal and the second signal is a UWB signal.

In this embodiment of the application, the second signal may be based on a bluetooth technology, and the second signal may also be based on an iBeacons technology, which is not specifically limited in this application.

A terminal provided in the embodiments of the present application is described in detail below by taking the first signal as a WiFi signal and the second signal as a UWB signal as an example.

First, UWB technology is briefly introduced as follows:

ultra Wideband (UWB) is a carrier-free communication technology that uses non-sinusoidal narrow pulses on the nanosecond to microsecond level to transmit data. The UWB is a short-distance wireless carrier communication technology, which is different from the current mainstream communication technology path, and the UWB does not need to use a sinusoidal carrier in the conventional communication system, but transmits data by transmitting and receiving extremely narrow pulses having nanosecond or nanosecond level or less, thereby having a bandwidth of GHz level. At present, subnanosecond ultra-narrow pulses are utilized to carry out close-range accurate indoor positioning, and the positioning accuracy can reach the centimeter level.

Further, the characteristics of UWB technology are briefly described below from the perspective of the communication principle:

first, C = BW × log2 (1 + SNR) according to shannon formula.

C is a channel capacity, and BW is a channel bandwidth.

Where SNR = P/BW/N, signal-to-noise ratio.

Further, P is the received signal power and N is the noise power spectral density.

As can be seen from the SNR formula, the BW value is larger, so the ratio of the denominator BW/N is larger. Therefore, the SNR ratio is small, and the communication quality is high due to the low SNR.

It should be noted that the larger value of the channel capacity C indicates that the radio frequency system has a higher channel capacity.

Based on this, UWB has many advantages such as high data transmission rate, low power consumption, strong penetration capability, good anti-multipath effect, and high security, and becomes a better technical path in wireless Local Area Networks (LANs) and Personal Area Networks (PANs).

Further, the UWB signal may be similar to the baseband signal and may employ OOK pulse keying modulation, pulse amplitude modulation, or pulse phase modulation.

In the embodiment of the application, because the frequency adopted by the UWB is higher and the frequency band is wider, although the transmission distance is limited, the UWB hardly affects other wireless signals, and the transmission capacity and the transmission rate are larger, so that the UWB can be applied to solve the problem of data jamming through WIFI transmission.

In order to better explain the invention, a block diagram of the UWB uplink modulation is briefly introduced below, as shown in fig. 4.

As can be seen from fig. 4, the signal to be transmitted is a baseband signal, and the signal to be transmitted is amplitude or phase modulated in the modulator. The local oscillator generates a pulse repetition frequency PRF signal, which is input to the pulse generator. The pulse generator is a generating device of UWB pulse signals, and a linear time domain transient rectangular pulse generator is generally adopted.

It should be noted that, the frequency spectrum currently and commonly used by UWB is: 3244MHz to 4742MHz and 6240MHz to 6999MHz, and the spectrum resources used in each region are different. The modulated signal is input to a power amplifier PA for amplification because of low amplitude energy of the spectrum amplitude. Finally, the modulated signal with certain power is radiated to a far field through the antenna.

Further, as shown in fig. 5, it is a block diagram of a WIFI uplink modulation.

In a WIFI link, a signal to be transmitted is a baseband signal, the signal to be transmitted is modulated in a modulator, and the modulator is generally implemented by using a gilbert unit with high gain, relatively low noise and good linearity. Similarly, the PRF is a repetition frequency signal generated by a local oscillator. The sine wave generator will generate a WIFI sine wave carrier. In the modulator, linear shifting of frequency spectrum is carried out, and baseband signals are boosted to 5GHz WIFI frequency spectrum. Then, the signal is amplified by an internal power amplifier iPA of the chip and then input to an external power amplifier ePA for continuous amplification.

Based on this, a terminal in which the antenna unit is a single antenna and a terminal in which the antenna unit is a dual antenna will be described below.

For a terminal with dual antennas, that is, two antennas are required, as shown in fig. 6, the signal to be transmitted is a baseband signal. The Switch unit adopts FET Switch design, is subjected to bias control by BPI level, and selects to Switch on a UWB modulator channel or a WIFI modulator channel by controlling the FET. The PRF is a local oscillator signal, which is determined by the platform, for example, a 26MHz local oscillator signal of the MTK platform, so that the same PRF is required regardless of the WIFI signal channel or the UWB signal channel. That is, the UWB signal and the WIFI signal are modulated by the respective modulators, and are output to the power amplifier for amplification.

Further, the frequency ranges of the UWB antenna, i.e., the antenna transmitting the UWB signal, are 3244MHz to 4742MHz, 6240MHz to 6999MHz, 2.4G, and 5G.

Further, the frequency ranges of the WIFI antenna, i.e., the antenna transmitting the WIFI signal, are 2.4 to 2.5GHz and 5.15 to 5.85 GHz.

From the above, it can be seen that 6GHz is a doubling of 3GHz, so that the UWB antenna is easier to tune. 5GHz is also the frequency doubling of 2.5GHz, so the WIFI antenna is also easy to tune.

Above-mentioned scheme, because UWB antenna and WIFI antenna are all harmonious easily for antenna design is more convenient.

Further, the terminal with the antenna unit being a dual antenna further comprises a power amplifier located between the second signal path and the second antenna; the power amplifier is used for amplifying a second signal, wherein the frequency spectrum corresponding to the second signal is 6240-6999 MHz.

For a terminal with a single antenna unit, the WIFI antenna and the UWB antenna are combined into one. The frequency range covered by the antenna is 2.4GHz to 2.5GHz, 3.244GHz to 4.742GHz, 5.15GHz to 5.85GHz and 6.24GHz to 7 GHz.

In the embodiment of the present application, whether to switch on the UWB signal channel or the WIFI signal channel may be selected by SP2T, as shown in fig. 7.

As can be seen from FIG. 7, the two RF ports of SP2T are RF1 and RF2, respectively. Wherein, RF1 connects the WIFI signal, and RF2 connects the UWB signal, and its output port connects the antenna.

It should be noted that SP2T is controlled by a BPI control signal from the CPU.

In the embodiment of the application, when the WIFI RSSI value is lower than the threshold value, that is, under the condition that the transmission quality of the WIFI signal is not good, the UWB signal channel is switched to perform modulation uplink transmission.

In one possible implementation, the RF1-RF COMMON signal path is turned on when the BPI is low. When the BPI is high, the RF2-RF COMMON signal path is turned on. Therefore, the broadband antenna is conducted, and a WIFI signal channel and a UWB signal channel are considered at the same time.

Furthermore, the terminal with the antenna unit as a single antenna further comprises a power amplifier positioned between the second signal channel and the switch unit; the power amplifier is used for amplifying a second signal, wherein the frequency spectrum corresponding to the second signal is 6240-6999 MHz.

The signal transmission link of the terminal with the single-antenna unit and the terminal with the double-antenna unit is introduced above, and the compatible design of the signal to be transmitted, the WIFI signal channel and the UWB signal channel is explained below.

In a possible embodiment, the logical control of the terminals is realized by field effect transistors FET. The principle of which is briefly described below.

As shown in fig. 8, when the Gate voltage Gate is high, the Source and Drain of the fet are in an On state, and the equivalent circuit is a parasitic resistor Ron. When the Gate voltage Gate is at a low level, the depletion layer of the fet no longer has the transferred charges, and the Source and the Drain are disconnected. The equivalent circuit model becomes a parallel circuit of Coff and Roff.

Further, fig. 8 illustrates the case where the WIFI signal channel is turned on, and it can be seen that the WIFI signal channel is composed of four field effect transistors.

Specifically, ON1 is controlled by CPU BPI to turn FET Source and Drain ON, and OFF2 is low to reduce spurious ground signals and allow more of the signal to pass through the mixer path. OFF1 disconnects the pulse generator from the mixer FET and ON2 provides a bias voltage that acts to provide a ground path for the UWB signal channel so as not to interfere with its subsequent circuitry.

Further, when the UWB signal path is on, as shown in fig. 9. Since the principle is the same as that when the WIFI signal channel is switched on, the description is omitted here.

Specifically, since the OFF1 FET in the WIFI signal channel is an OFF voltage, a signal to be transmitted cannot enter the WIFI signal channel at the rear end through the OFF1 and the ON 2.

Further, the ON1 FET is high, and Source and Drain are turned ON by the FET due to the Gate high voltage. The OFF2 bias is low and is therefore OFF. The effect of OFF2 is not to allow signal loss through parasitic loops, but rather to continue on to the UWB signal path with lower back-end impedance.

Furthermore, because the UWB signal frequency is higher, the skin effect is obvious, and the insertion loss of the microstrip transmission line is larger. In addition, the switch is a CMOS process, which causes non-linear distortion.

According to the scheme, the problem of unsmooth WIFI signal transmission is solved through the compatible design of WIFI and UWB. When WIFI signal transmission produces the card owing to reasons such as channel interference and dunes, RSSI worsens when certain threshold value, switches to UWB signal channel transmission signal promptly, and UWB has the bandwidth width, is difficult to receive the advantage of disturbing, can solve the transmission card problem of duning, has promoted user experience.

Based on this, in order to compensate for the influence on signal attenuation and improve the conducted power, the embodiment of the application pre-amplifies 6240MHz-6999MHz signals in UWB signals in a UWB signal channel.

Further, the power amplifier has a short-circuit switch;

the short-circuit switch is used for being disconnected when the second signal channel outputs the second signal of the 6240-6999MHz spectrum; and is conducted when the second signal channel outputs the second signal with the frequency spectrum of non-6240-6999 MHz.

From the above, it can be seen that what the present application preamplifies is that the short-circuit switch is closed at a UWB signal of 3244MHz to 4742MHz, i.e., no amplification is performed at a relatively low frequency, and passes through the UWB signal path behind. Only 6240MHz to 6999MHz UWB signals are amplified.

Further, as shown in fig. 10, the power amplifier design is based on CMOS process.

In the embodiment of the application, the power amplifier adopts a direct current separation technology and is in a vertical cascade structure.

On the other hand, in the amplifier using the dc separation technique, the stack structure thereof greatly limits the reduction of the operating voltage, and since the operating voltage and the power consumption of the circuit have a square variation relationship, the design for reducing the operating voltage of the circuit is adopted in order to reduce the power consumption of the circuit. On the other hand, the direct current separation technology can provide an effective down-ground path for the DC bias voltage, and prevent the direct current signal from entering the back-end circuit to generate intermodulation in the mixer.

Further, the power amplifier comprises a first RC circuit, a first transistor, a blocking capacitor, a second transistor and a second RC circuit which are sequentially connected in series from the signal input end to the signal output end;

the first transistor and the second transistor are field effect transistors;

a second RC circuit for converting the second signal into a third signal;

the signal output end is used for outputting a third signal;

the blocking capacitor is used for filtering the direct current signal in the second signal.

As can be seen from fig. 10, the UWB signal to be amplified is input from RFin, amplified, and output from RFout.

In the embodiment of the present application, specifically, the first RC circuit includes a capacitor C1 and a resistor R1; the second RC circuit comprises a capacitor C2 and a resistor R2; the first transistor is M1; the second transistor is M2; the blocking capacitance is C4. The dc current flow between the two NMOS transistors is blocked by C4.

In the embodiment of the present application, the power amplifier further includes a fifth inductor L5 located at the source of the first transistor and a fourth inductor L4 located at the drain of the second transistor.

Further, in order to provide a normal power supply voltage for the two NMOS transistors, it is ensured that the two transistors operate in a saturation region, and L4 and L5 play a role in a circuit, so that the two transistors operate in the saturation region, wherein L4 is connected to the source of M2, it is ensured that current flows out of M2 to the CMOS ground, and L5 is connected to the drain of M1. To ensure the normal power supply of the circuit, the other end of L5 is connected to the power supply.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims

1. A mobile terminal, comprising: the antenna comprises a processor, a switch unit, a first signal channel, a second signal channel and an antenna unit;

the processor is used for outputting a control signal to the switch unit according to the detected signal intensity of the first signal;

the antenna unit is communicated with the first signal channel and the second signal channel and is used for transmitting the first signal or the second signal;

the first signal is a WiFi signal, and the second signal is a UWB signal;

the mobile terminal further comprises a power amplifier located between the second signal path and the switching unit;

the power amplifier has a short circuit switch;

the short-circuit switch is used for being disconnected when the second signal channel outputs a second signal with 6240-6999MHz spectrum; conducting when the second signal channel outputs a second signal with a frequency spectrum of non-6240-6999 MHz;

the power amplifier adopts a direct current separation technology and is in a vertical cascade structure;

the power amplifier comprises a first RC circuit, a first transistor, a blocking capacitor, a second transistor and a second RC circuit which are sequentially connected in series from a signal input end to a signal output end;

the first transistor and the second transistor are field effect transistors;

the first RC circuit is used for converting a second signal input by the signal input end into a third signal;

the second RC circuit is used for converting the third signal into a fourth signal;

the signal output end is used for outputting a fourth signal;

the blocking capacitor is used for filtering a direct current signal in the third signal.

2. The mobile terminal of claim 1, wherein the antenna unit is a single antenna; the first signal or the second signal is transmitted through a single antenna;

3. The mobile terminal of claim 1, wherein the antenna unit is a dual antenna; the dual antenna comprises a first antenna and a second antenna;

the first signal path is connected with a first antenna in the dual antenna;

the second signal path is connected to a second antenna of the dual antennas.

4. The mobile terminal of any of claims 1-3, wherein the first signal path and the second signal path share a local oscillator.