Methods and electronic devices for suppressing harmonics

Abstract

This application relates to the field of antenna technology, providing a method and electronic device for suppressing harmonics. The electronic device includes a first module, a second module, a first antenna, a second antenna, and a phase shifter. The first module includes a first channel and a second channel, and the second module includes a first switch. The first channel is connected to the first antenna, and the second channel is connected to the second antenna via the phase shifter and the first switch. The electronic device transmits a first signal through the first channel and the first antenna. When the electronic device transmits the first signal, the first switch is in an open state, and the phase shifter adjusts the phase of the second signal to the first phase. The first phase is opposite to the phase of the third signal. Since the phases of the second and third signals are opposite, the second signal can be canceled out by the third signal. Therefore, the harmonic signals radiated to the second antenna through the first switch can be reduced, thereby improving the performance of the electronic device.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and more specifically, to a method and electronic device for suppressing harmonics. Background Art

[0002] With the development of 5G technology, terminal devices typically need to operate on multiple frequency bands. For example, the operating frequency bands of terminal devices include 900MHz and 1800MHz.

[0003] When the terminal device operates at 900MHz, the second harmonic of 900MHz is 1800MHz. Since the terminal device's operating frequency band includes 1800MHz, meaning that the terminal device has a transmission channel for transmitting 1800MHz signals, the second harmonic of the 900MHz signal can radiate outwards through the 1800MHz signal transmission channel, causing signal leakage in the terminal device and consequently degrading its test performance.

[0004] Therefore, how to avoid the deterioration of the test performance of terminal devices caused by second harmonic leakage has become an urgent problem to be solved. Summary of the Invention

[0005] This application provides a method and electronic device for suppressing harmonics, which can avoid the problem of deteriorated test performance of terminal devices caused by second harmonic leakage in terminal devices.

[0006] In a first aspect, an electronic device is provided, comprising a first module, a second module, a first antenna, a second antenna, and a phase shifter. The first module includes a first channel and a second channel, and the second module includes a first switch. The first channel is connected to the first antenna, and the second channel is connected to the second antenna via the phase shifter and the first switch. The electronic device transmits a first signal via the first channel and the first antenna. When the electronic device transmits the first signal, the first switch is in an open state. The phase shifter is used to adjust the phase of the second signal to the first phase, which is opposite to the phase of the third signal. The second signal refers to the harmonic signal radiated by the first signal to the phase shifter, and the third signal refers to the signal of the second signal reflected back to the first module by the first switch and then reflected back to the first switch.

[0007] The electronic device provided in this embodiment includes a first module, a second module, a first antenna, a second antenna, and a phase shifter. The first module includes a first channel and a second channel, and the second module includes a first switch. The first channel is connected to the first antenna, and the second channel is connected to the second antenna through the phase shifter and the first switch. The electronic device transmits a first signal through the first channel and the first antenna. When the electronic device transmits the first signal, the first switch is in an open state, and the phase shifter adjusts the phase of the second signal to the first phase. The first phase is opposite to the phase of the third signal. The second signal refers to the harmonic signal radiated by the first signal to the phase shifter, and the third signal refers to the signal reflected back to the first module by the first switch and then reflected back to the first switch. Since the phases of the second signal and the third signal are opposite, the second signal can be canceled out by the third signal. Therefore, the harmonic signal radiated to the second antenna through the first switch can be reduced, which reduces the signal radiated outward by the second antenna when the electronic device transmits the first signal, thereby improving the performance of the terminal device in testing CSE.

[0008] In conjunction with the first aspect, in some implementations of the first aspect, the phase difference between the first phase and the third signal is 180°.

[0009] The electronic device provided in the embodiments of this application includes a first module, a second module, a first antenna, a second antenna, and a phase shifter. The first module includes a first channel and a second channel, and the second module includes a first switch. The first channel is connected to the first antenna, and the second channel is connected to the second antenna through the phase shifter and the first switch. The electronic device transmits a first signal through the first channel and the first antenna. When the electronic device transmits the first signal, the first switch is in an open state. The phase shifter is used to adjust the phase of the second signal so that the phase difference between the second signal and the third signal is 180°. The second signal refers to the harmonic signal radiated by the first signal to the phase shifter, and the third signal refers to the signal reflected back to the first module by the first switch and then reflected back to the first switch. This allows the second signal to be canceled out by the third signal to the maximum extent, thereby minimizing the harmonic signal radiated to the second antenna through the first switch and further improving the performance of the terminal device in testing CSE.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, the second signal refers to the second harmonic signal radiated by the first signal to the phase shifter.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the electronic device transmits a fourth signal via a second channel, a phase shifter, a first switch, and a second antenna, the frequency band of the fourth signal being the same as that of the second signal.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, the second module further includes a third channel connected to the second antenna, through which the electronic device transmits a fifth signal, the frequency band of which is the same as that of the second signal.

[0013] The electronic device provided in the embodiments of this application includes a first module, a second module, a first antenna, a second antenna, and a phase shifter. The first module includes a first channel and a second channel, and the second module includes a first switch and a third channel. The first channel is connected to the first antenna, the second channel is connected to the second antenna via the phase shifter and the first switch, and the third channel is also connected to the second antenna. The electronic device transmits a first signal through the first channel and the first antenna, a fourth signal through the second channel, the phase shifter, the first switch, and the second antenna, and a fifth signal through the third channel and the second antenna. Alternatively, the first channel can be connected to the first antenna, and the second channel can be connected to the second antenna via the phase shifter and the first switch. The electronic device can transmit the first signal through the first channel and the first antenna, the fourth signal through the second channel, the first switch, and the second antenna, and the fifth signal through the third channel and the second antenna. In this embodiment, when the electronic device transmits the first signal, the first switch is in the open state. The phase shifter is used to adjust the phase of the second signal to the first phase, which is opposite to the phase of the third signal. The second signal refers to the harmonic signal radiated from the first signal to the phase shifter. The third signal refers to the signal reflected back to the first module by the first switch and then reflected back towards the first switch. The second, fourth, and fifth signals are signals in the same frequency band. This allows the electronic device to reduce the harmonic signal radiated to the second antenna through the first switch when transmitting the first signal, as the phase shifter can change the phase of the harmonic signal (second signal) of the first signal, making the second signal canceled out by the third signal. This reduces the signal radiated outward through the second antenna when the electronic device transmits the first signal, thereby improving the performance of the terminal device in CSE testing. Furthermore, when the electronic device transmits the fourth signal through the second channel, the low insertion loss of the phase shifter does not affect the signal amplitude of the fourth signal transmitted by the electronic device, thus avoiding the performance degradation of the electronic device using the phase shifter in this embodiment when operating in the operating frequency band of the fourth signal.

[0014] Secondly, a method for suppressing harmonics is provided. This method is applied in an electronic device, which includes a first module, a second module, a first antenna, a second antenna, and a phase shifter. The first module includes a first channel and a second channel, and the second module includes a first switch. The first channel is connected to the first antenna, and the second channel is connected to the second antenna through the phase shifter and the first switch. The method includes:

[0015] The first signal is transmitted through the first channel and the first antenna, wherein the first switch is in the off state when the electronic device is transmitting the first signal;

[0016] The phase of the second signal is adjusted to the first phase by a phase shifter. The first phase is opposite to the phase of the third signal. The second signal refers to the harmonic signal radiated by the first signal to the phase shifter. The third signal refers to the signal that is reflected back to the first module by the first switch and then reflected back to the first switch.

[0017] In conjunction with the second aspect, in some implementations of the second aspect, the phase difference between the first phase and the third signal is 180°.

[0018] In conjunction with the second aspect, in some implementations of the second aspect, the second signal refers to the second harmonic signal radiated by the first signal to the phase shifter.

[0019] In conjunction with the second aspect, in some implementations of the second aspect, the method further includes: transmitting a fourth signal through a second channel, a phase shifter, a first switch, and a second antenna, wherein the frequency band of the fourth signal is the same as the frequency band of the second signal, and the first switch is in an on state when transmitting the fourth signal.

[0020] In conjunction with the second aspect, in some implementations of the second aspect, the second module further includes a third channel connected to the second antenna, and the method further includes: transmitting a fifth signal through the third channel and the second antenna, wherein the frequency band of the fifth signal is the same as the frequency band of the second signal.

[0021] This application implements an electronic device and a method for suppressing harmonics. The electronic device includes a first module, a second module, a first antenna, a second antenna, and a phase shifter. The first module includes a first channel and a second channel. The second module includes a first switch. The first channel is connected to the first antenna. The second channel is connected to the second antenna via the phase shifter and the first switch. The electronic device transmits a first signal through the first channel and the first antenna. When the electronic device transmits the first signal, the first switch is in an open state. The phase shifter adjusts the phase of the second signal to the first phase, which is opposite to the phase of the third signal. The second signal refers to the harmonic signal radiated by the first signal to the phase shifter. The third signal refers to the signal of the second signal reflected back to the first module after passing through the first switch and then reflected back towards the first switch. Since the phases of the second signal and the third signal are opposite, the second signal can be canceled out by the third signal. Therefore, the harmonic signal radiated to the second antenna through the first switch can be reduced, which means that the signal radiated outward through the second antenna when the electronic device transmits the first signal is reduced, thereby improving the performance of the terminal device in testing CSE. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the structure of an electronic device;

[0023] Figure 2 This is a schematic diagram of the structure of an electronic device provided in one embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the structure of an electronic device provided in one embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the structure of a phase shifter provided in one embodiment of this application;

[0026] Figure 5 An equivalent circuit diagram of an electronic device provided in an embodiment of this application;

[0027] Figure 6 A schematic diagram illustrating the isolation level of an electronic device provided in an embodiment of this application;

[0028] Figure 7 A schematic diagram of insertion loss of an electronic device provided in an embodiment of this application;

[0029] Figure 8 This is a schematic diagram of the structure of a phase shifter provided in another embodiment of this application;

[0030] Figure 9 This is a schematic flowchart of a method for suppressing harmonics provided in an embodiment of this application;

[0031] Figure 10 This is a schematic flowchart of a method for suppressing harmonics provided in an embodiment of this application;

[0032] Figure 11 This is a flowchart illustrating a method for suppressing harmonics provided in an embodiment of this application. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B; "and / or" in this text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0034] Hereinafter, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0035] To facilitate understanding, the relevant concepts involved in this application will be explained first.

[0036] 1. Harmonic signals

[0037] When electronic devices are operating, the frequency band of the electromagnetic wave signals they transmit can be called the fundamental frequency. This electromagnetic wave signal often oscillates, generating signals with frequencies several times higher than the fundamental frequency; these signals are called harmonic signals. These harmonic signals usually affect the normal operation of electronic devices and need to be suppressed.

[0038] For example, a 900MHz electromagnetic wave signal can generate harmonic signals of 1800MHz, 2700MHz, and 3600MHz. Among them, the 1800MHz harmonic signal is the second harmonic signal, the 2700MHz harmonic signal is the third harmonic signal, and the 3600MHz harmonic signal is the fourth harmonic signal.

[0039] 2. Functional module for integrated duplexer (PAMiD)

[0040] PAMiD integrates a power amplifier (PA), filter, switch, and low-noise amplifier (LNA) into a single module, allowing for unified commissioning. This avoids performance changes in the entire RF front-end caused by adjusting the specifications of one component during use, simplifying RF front-end design from a complex system design engineering process. Currently, since terminal devices typically support multiple signal transmission standards, RF front-ends supporting the same standard can be integrated into a single PAMiD. For example, the RF front-end for transmitting Global System for Mobile Communications (GSM) signals can be concentrated in one PAMiD (first PAMiD), while the RF front-end for transmitting Long Term Evolution (LTE) signals can be concentrated in another PAMiD (second PAMiD).

[0041] When the terminal device can simultaneously support both GSM and LTE standards, the operating frequency bands for GSM include 900MHz and 1800MHz, while the operating frequency band for LTE is 1800MHz. The first PAMiD includes a 900MHz channel and an 1800MHz channel. The 900MHz channel includes a PA operating at 900MHz, a filter operating at 900MHz, a switch operating at 900MHz, and a low-noise amplifier operating at 900MHz. The 1800MHz channel includes a PA operating at 1800MHz, a filter operating at 1800MHz, a switch operating at 1800MHz, and a low-noise amplifier operating at 1800MHz. The second PAMiD includes an 1800MHz channel, which comprises a PA operating at 1800MHz, a filter operating at 1800MHz, a switch operating at 1800MHz, and a low-noise amplifier operating at 1800MHz.

[0042] 3. Conducted stray emissions (CSE)

[0043] To prevent harmonic signals radiated from a mobile phone when it operates in the first frequency band from interfering with other electronic devices, CSE testing is typically required. For example, when a mobile phone operates at 900MHz, it is necessary to test the signals radiated from it in other frequency bands to prevent the 1800MHz, 2700MHz, and 3600MHz harmonic signals generated by the 900MHz signal from interfering with the normal operation of other electronic devices.

[0044] Currently, electronic devices typically need to operate under multiple standards. For example, an electronic device may operate under both GSM and LTE standards. The GSM standard operates in the 900MHz and 1800MHz frequency bands, while the LTE standard operates in the 1800MHz frequency band. Typically, an electronic device includes a first module, a second module, a first antenna, and a second antenna, such as... Figure 1As shown in the diagram, the first module is a GSM PAMiD, which includes a 900MHz channel and an 1800MHz channel. The second module is an LTE PAMiD, which includes a first switch and an 1800MHz channel. The first antenna operates at a frequency of 900MHz, and the second antenna operates at a frequency of 1800MHz. The 900MHz channel in the GSM PAMiD is connected to the first antenna, and the 1800MHz channel in the GSM PAMiD is connected to the second antenna via the first switch. When the electronic device operates at 900MHz, the second harmonic signal of the 900MHz signal (the 1800MHz signal) is radiated outward through the 1800MHz channel, the first switch, and the second antenna, causing the electronic device to fail the CSE test. If a filter is added between the 1800MHz channel and the first switch to filter the second harmonic signal of the 900MHz signal (the 1800MHz signal), the normal operating signal (also a 1800MHz signal) will be filtered out by the filter when the electronic device is operating at 1800MHz, and cannot be transmitted normally through the second antenna.

[0045] In view of this, embodiments of this application provide an electronic device and a method for suppressing harmonics. The electronic device includes a first module, a second module, a first antenna, a second antenna, and a phase shifter. The first module includes a first channel and a second channel, and the second module includes a first switch. The first channel is connected to the first antenna, and the second channel is connected to the second antenna via the phase shifter and the first switch. The electronic device transmits a first signal through the first channel and the first antenna. When the electronic device transmits the first signal, the first switch is in an open state, and the phase shifter adjusts the phase of the second signal to the first phase. The first phase is opposite to the phase of the third signal. The second signal refers to the harmonic signal radiated by the first signal to the phase shifter, and the third signal refers to the signal reflected back to the first module by the first switch and then reflected back to the first switch. Since the phases of the second signal and the third signal are opposite, the second signal can be canceled out by the third signal. Therefore, the harmonic signal radiated to the second antenna through the first switch can be reduced, which means that the signal radiated outward by the second antenna when the electronic device transmits the first signal is reduced, thereby improving the performance of the terminal device in testing CSE.

[0046] The harmonic suppression method provided in this application can be applied to electronic devices. Optionally, the electronic device includes a terminal device, which may also be called a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. The terminal device can be a mobile phone, smart TV, wearable device, tablet computer, computer with wireless transceiver function, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc. The embodiments of this application do not limit the specific technology or device form used in the terminal device.

[0047] For example, Figure 2 A schematic diagram of the structure of electronic device 100 is shown. Electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, antenna 1, antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, a headphone jack 170D, a sensor module 180, buttons 190, a motor 191, an indicator 192, a camera 193, a display screen 194, and a subscriber identification module (SIM) card interface 195, etc. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, a barometric pressure sensor 180C, a magnetic sensor 180D, an accelerometer sensor 180E, a distance sensor 180F, a proximity sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, etc.

[0048] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the electronic device 100. In other embodiments of this application, the electronic device 100 may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0049] Processor 110 may include one or more processing units, such as: application processor (AP), modem processor, graphics processing unit (GPU), image signal processor (ISP), controller, memory, video codec, digital signal processor (DSP), baseband processor, and / or neural network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0050] The controller can be the nerve center and command center of the electronic device 100. The controller can generate operation control signals according to the instruction opcode and timing signals to complete the control of fetching and executing instructions.

[0051] The processor 110 may also include a memory for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. This memory can store instructions or data that the processor 110 has just used or that are used repeatedly. If the processor 110 needs to use the instruction or data again, it can retrieve it directly from the memory. This avoids repeated accesses, reduces the waiting time of the processor 110, and thus improves the efficiency of the system.

[0052] In one possible scenario, the electronic device 100 includes multiple antennas; for example, the electronic device 100 may include two antennas. These two antennas are antenna 1 and antenna 2. The wireless communication function of the electronic device 100 can be implemented through antenna 1, antenna 2, a mobile communication module 150, a wireless communication module 160, a modem processor, and a baseband processor, etc.

[0053] Antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in electronic device 100 can be used to cover one or more communication frequency bands. Different antennas can also be multiplexed to improve antenna utilization. For example, antenna 1 can be multiplexed as a diversity antenna for a wireless local area network. In some other embodiments, the antennas can be used in conjunction with tuning switches.

[0054] The mobile communication module 150 can provide solutions for wireless communication, including 2G / 3G / 4G / 5G, applied to the electronic device 100. The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (LNA), etc. The mobile communication module 150 can receive electromagnetic waves via antenna 1, and perform filtering, amplification, and other processing on the received electromagnetic waves before transmitting them to a modem processor for demodulation. The mobile communication module 150 can also amplify the signal modulated by the modem processor and convert it into electromagnetic waves for radiation via antenna 1. In some embodiments, at least some functional modules of the mobile communication module 150 may be housed in the processor 110. In some embodiments, at least some functional modules of the mobile communication module 150 and at least some modules of the processor 110 may be housed in the same device.

[0055] The modem processor may include a modulator and a demodulator. The modulator modulates the low-frequency baseband signal to be transmitted into a mid-to-high frequency signal. The demodulator demodulates the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then transmits the demodulated low-frequency baseband signal to the baseband processor for processing. After processing by the baseband processor, the low-frequency baseband signal is transmitted to the application processor. The application processor outputs sound signals through an audio device (not limited to speaker 170A, receiver 170B, etc.) or displays images or videos through the display screen 194. In some embodiments, the modem processor may be a separate device. In other embodiments, the modem processor may be independent of the processor 110 and may be housed in the same device as the mobile communication module 150 or other functional modules.

[0056] The wireless communication module 160 can provide solutions for wireless communication applications on the electronic device 100, including wireless local area networks (WLANs) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), and infrared (IR) technologies. The wireless communication module 160 can be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via antenna 2, performs frequency modulation and filtering of the electromagnetic wave signals, and sends the processed signal to processor 110. The wireless communication module 160 can also receive signals to be transmitted from processor 110, perform frequency modulation and amplification, and convert them into electromagnetic waves for radiation via antenna 2.

[0057] In one possible scenario, the wireless communication module 160 can receive signals to be transmitted from two frequency bands from the processor 110, perform frequency modulation and amplification through different channels, and then convert them into electromagnetic waves for radiation via the antenna 2. This means that the antenna 2 needs to simultaneously meet the performance requirements of both frequency bands.

[0058] In some embodiments, antenna 1 of electronic device 100 is coupled to mobile communication module 150, and antenna 2 is coupled to wireless communication module 160, enabling electronic device 100 to communicate with networks and other devices via wireless communication technology. The wireless communication technology may include Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Time-Division Code Division Multiple Access (TD-SCDMA), Long Term Evolution (LTE), 5G (the 5th Generation of wireless communication system), BT, GNSS, WLAN, NFC, FM, and / or IR technologies, etc. The GNSS may include the Global Positioning System (GPS), the Global Navigation Satellite System (GLONASS), the BeiDou Navigation Satellite System (BDS), the Quasi-Zenith Satellite System (QZSS), and / or satellite-based augmentation systems (SBAS).

[0059] It should be noted that any electronic device mentioned in the embodiments of this application may include more or fewer modules in electronic device 100.

[0060] The software system of electronic device 100 can adopt a layered architecture, event-driven architecture, microkernel architecture, microservice architecture, or cloud architecture.

[0061] The following is combined Figures 3 to 8 The electronic devices and harmonic suppression methods provided in the embodiments of this application will be described in detail.

[0062] Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application, such as... Figure 3As shown, the electronic device 100 includes a first module 110, a second module 120, a first antenna 130, a second antenna 140, and a phase shifter 150. The first module 110 includes a first channel 111 and a second channel 112. The second module 120 includes a first switch 121. The first channel 111 is connected to the first antenna 130. The second channel 112 is connected to the second antenna 140 through the phase shifter 150 and the first switch 121. The electronic device 100 transmits a first signal through the first channel 111 and the first antenna 130. When the electronic device transmits the first signal, the first switch 121 is in an open state. The phase shifter 150 is used to adjust the phase of the second signal to the first phase. The first phase is opposite to the phase of the third signal. The second signal refers to the harmonic signal radiated by the first signal to the phase shifter 150. The third signal refers to the signal of the second signal reflected back to the first module 110 after passing through the first switch 121 and then reflected back to the first switch 121.

[0063] The first module 110 may be a module that includes at least two channels.

[0064] For example, the first module 110 may be a PAMiD, which includes devices such as a power amplifier (PA), a filter, a switch, and a low noise amplifier (LNA).

[0065] It should be understood that the first module 110 may include a first channel 111 and a second channel 112. The first channel 111 may include a power amplifier (PA), a filter, a switch, and an low-frequency receiver (LNA) operating in the first frequency band. The above description of the devices included in the first channel 111 is merely an example; the first channel 111 may include more or fewer devices, and this application embodiment does not limit this. The second channel 112 may include a power amplifier (PA), a filter, a switch, and an LNA operating in the second frequency band. The above description of the devices included in the second channel 112 is merely an example; the second channel 112 may include more or fewer devices, and this application embodiment does not limit this. That is to say, the first channel 111 can transmit signals in the first frequency band, and the second channel 112 can transmit signals in the second frequency band.

[0066] For example, the first module 110 can also be a module formed by PA.

[0067] It should be understood that the first module 110 may include a first channel 111 and a second channel 112. The first channel 111 may include a power amplifier (PA) operating in the first frequency band. The second channel 112 may include a power amplifier (PA) operating in the second frequency band. That is to say, the first channel 111 can transmit signals in the first frequency band, and the second channel 112 can transmit signals in the second frequency band.

[0068] In this embodiment, the first antenna 130 is connected to the first channel 111. The electronic device 100 can transmit a first signal, which is a signal of the first frequency band, through the first channel 111 and the first antenna 130. When the electronic device 100 transmits the first signal through the first channel 111 and the first antenna 130, the first switch 121 is in the open state. It should be understood that in the radio frequency field, the first switch 121 being in the open state is equivalent to a significant attenuation of the signal strength passing through the first switch 121, rather than complete isolation of the signal passing through the first switch 121. In this case, when the electronic device 100 transmits the first signal through the first channel 111 and the first antenna 130, if the frequency of the harmonic signal generated by the first signal is the same as the operating frequency of the second antenna 140, the harmonic signal generated by the first signal can be radiated outward through the first switch 121 and the second antenna 140, affecting the test performance of the electronic device. Based on this, this embodiment adds a phase shifter 150 between the first switch 121 and the second channel 112 in the first module 110 to solve the problem of the harmonic signal generated by the first signal radiating outward through the first switch 121 and the second antenna 140.

[0069] The harmonic signal generated by the first signal can be a second harmonic signal or a higher harmonic signal; this application does not limit this.

[0070] For example, the operating frequency of the first signal is 900MHz, and the harmonic signal generated by the first signal can refer to the second harmonic signal, which is a signal of 1800MHz. The operating frequency of the second antenna 140 is 1800MHz, therefore, the harmonic signal generated by the first signal is radiated outward through the second antenna 140.

[0071] For example, the operating frequency of the first signal is 900MHz, and the harmonic signal generated by the first signal can refer to the third harmonic signal, which is a 2700MHz signal. The operating frequency of the second antenna 140 is 2700MHz, therefore, the harmonic signal generated by the first signal is radiated outward through the second antenna 140.

[0072] The phase shifter 150 can be a circuit network composed of capacitors and inductors. For example... Figure 4 As shown, the phase shifter 150 can be a π-type circuit network composed of inductors and capacitors.

[0073] For example, phase shifter 150 can be as follows Figure 4 As shown in (a), it is a π-type circuit network consisting of an inductor and two capacitors.

[0074] For example, phase shifter 150 can be as follows Figure 4As shown in (b), it is a π-type circuit network consisting of a capacitor and two inductors.

[0075] The following explains how the phase shifter 150 solves the problem of harmonic signals generated by the first signal radiating outward.

[0076] Figure 5 This is an equivalent circuit diagram of the electronic device provided in the embodiments of this application. For ease of understanding, the following description uses the example of the first channel 111 of the first module 110 of the electronic device 100 transmitting a 900MHz signal and the second channel 112 transmitting an 1800MHz signal.

[0077] like Figure 5As shown, when the electronic device 100 transmits a 900MHz signal through the first channel 111, the second harmonic signal of the 900MHz signal is a signal with an operating frequency of 1800MHz. This signal is radiated to the phase shifter 150 through the second channel 112 and transmitted to the first switch 121. Since the first switch 121 is in the off state when the electronic device 100 transmits the 900MHz signal through the first channel 111, the second harmonic signal of the 900MHz signal is reflected back by the first switch 121. After being reflected to the first module 110, the second harmonic signal is reflected back to the first switch 121 through the path of the phase shifter 150; this signal is the third harmonic signal. This is equivalent to having a second harmonic signal (i.e., the second signal) sent from the second channel 112 to the first switch 121 via the phase shifter 150 in the path where the phase shifter 150 is located. The second harmonic signal is reflected back by the first switch 121, and after being reflected back to the first module 110, it is reflected back to the first switch 121 via the path where the phase shifter 150 is located (i.e., the third signal). It should be understood that the phase of the radio frequency signal changes with the transmission distance during transmission. The phase shifter 150 can adjust the phase of the second signal to the first phase, and the first phase is opposite to the phase of the third signal, thus allowing the signal amplitudes of the second and third signals to cancel each other out. For example, looking from test point A1 towards the first module 110, the corresponding Smith chart is shown in Smith chart B1. The Smith chart corresponding to test point A2 after the signal passes through the phase shifter 150 towards the first module 110 is shown in Smith chart B2. The impedance rotates counterclockwise, and the corresponding reflection coefficient phase angle is 180-α. The Smith chart corresponding to the direction from test point A2 towards the second module 120 is shown in Smith chart B3, with a corresponding reflection coefficient phase angle of α. This ensures a 180° phase difference between signals transmitted towards the second module 120, meaning the second harmonic signal radiated from the first switch 121 to the second antenna 140 is reduced. Because the second harmonic signal radiated from the first switch 121 to the second antenna 140 is reduced, the energy of the second harmonic signal radiated outward through the second antenna 140 is also reduced, thus improving the CSE (Concentration Effect) index of the terminal device.

[0078] Optionally, the phase shifter is used to adjust the phase of the second signal so that the phase difference between the second signal and the third signal is 180°.

[0079] It should be understood that when the phase difference between the second and third signals is 180°, the second and third signals are canceled out to the greatest extent possible, and when the signal amplitudes of the second and third signals are the same, the second signal can be completely canceled out by the third signal.

[0080] The electronic device provided in the embodiments of this application includes a first module, a second module, a first antenna, a second antenna, and a phase shifter. The first module includes a first channel and a second channel, and the second module includes a first switch. The first channel is connected to the first antenna, and the second channel is connected to the second antenna through the phase shifter and the first switch. The electronic device transmits a first signal through the first channel and the first antenna. When the electronic device transmits the first signal, the first switch is in an open state. The phase shifter is used to adjust the phase of the second signal so that the phase difference between the second signal and the third signal is 180°. The second signal refers to the harmonic signal radiated by the first signal to the phase shifter, and the third signal refers to the signal reflected back to the first module by the first switch and then reflected back to the first switch. This allows the second signal to be canceled out by the third signal to the maximum extent, thereby minimizing the harmonic signal radiated to the second antenna through the first switch and further improving the performance of the terminal device in testing CSE.

[0081] The following explains the effect of using phase shifter 150 to solve the problem of outward radiation of harmonic signals generated by the first signal.

[0082] Figure 6 This is a schematic diagram illustrating the isolation between the second channel 112 and the second antenna 140 of the electronic device provided in this embodiment (equivalent to the isolation between the second channel 112 and the second antenna 140 when the first switch 121 is in the off state). Figure 6 As shown, the isolation of the electronic device using phase shifter 150 is improved by about 10dB compared with that of the electronic device without phase shifter 150. This is equivalent to reducing the harmonic signal radiated outward by the second antenna 140 by 10dB, effectively reducing the harmonic signal radiated outward by the second antenna 140 and improving the test performance of the terminal equipment CSE.

[0083] Figure 7 This is a schematic diagram illustrating the insertion loss between the second channel 112 and the second antenna 140 of the electronic device provided in this embodiment (equivalent to the insertion loss between the second channel 112 and the second antenna 140 when the first switch 121 is in the ON state). Figure 7 As shown, the insertion loss of the electronic device using phase shifter 150 is not significantly different from that of the electronic device without phase shifter 150. In other words, adding phase shifter 150 will not affect the insertion loss between the second channel 112 and the second antenna 140 of the electronic device. This means that using phase shifter 150 will not affect the performance of the electronic device in transmitting 1800MHz signals through the second channel 112.

[0084] The electronic device provided in this embodiment includes a first module, a second module, a first antenna, a second antenna, and a phase shifter. The first module includes a first channel and a second channel, and the second module includes a first switch. The first channel is connected to the first antenna, and the second channel is connected to the second antenna through the phase shifter and the first switch. The electronic device transmits a first signal through the first channel and the first antenna. When the electronic device transmits the first signal, the first switch is in an open state, and the phase shifter adjusts the phase of the second signal to the first phase. The first phase is opposite to the phase of the third signal. The second signal refers to the harmonic signal radiated by the first signal to the phase shifter, and the third signal refers to the signal reflected back to the first module by the first switch and then reflected back to the first switch. Since the phases of the second signal and the third signal are opposite, the second signal can be canceled out by the third signal. Therefore, the harmonic signal radiated to the second antenna through the first switch can be reduced, which reduces the signal radiated outward by the second antenna when the electronic device transmits the first signal, thereby improving the performance of the terminal device in testing CSE.

[0085] In one possible scenario, the second module 120 also includes a third channel 122, which is connected to the second antenna 140. The electronic device 100 transmits a fifth signal through the third channel 122 and the second antenna 140. The frequency band of the fifth signal is the same as that of the second signal. The following describes... Figure 8 The embodiments shown will be described in detail.

[0086] Figure 8 A schematic diagram of the structure of an electronic device provided in another embodiment of this application, such as... Figure 8As shown, the electronic device 100 includes a first PAMiD (first module) 110, a second PAMiD (second module) 120, a first antenna 130, a second antenna 140, and a phase shifter 150. The first PAMiD 110 is a PAMiD for transmitting GSM signals, including a 900MHz channel (first channel) 111 and an 1800MHz channel (second channel) 112. The second PAMiD 120 is a PAMiD for transmitting LTE signals, including a first switch 121 and an 1800MHz channel (third channel) 122. The first antenna 130 is an antenna operating at a frequency of 900MHz, and the second antenna 140 is an antenna operating at a frequency of 1800MHz. The first channel 111 is connected to the first antenna 130. The second channel 112 is connected to the second antenna 140 via the phase shifter 150 and the first switch 121. The third channel 122 is connected to the second antenna 140. The electronic device 100 transmits a first signal through the first channel 111 and the first antenna 130. The electronic device 100 transmits a fourth signal through the second channel 112, the first switch 121, and the second antenna 140. The electronic device 100 transmits a fifth signal through the third channel 122 and the second antenna 140. When the electronic device 100 transmits the first signal, the first switch 121 is in the open state. The phase shifter 150 is used to adjust the phase of the second signal so that the second and third signals cancel each other out. The second signal refers to the harmonic signal radiated by the first signal to the phase shifter 150. The third signal refers to the signal reflected back to the first module 110 by the second signal after being reflected by the first switch 121, and then reflected back towards the first switch 121. The second, fourth, and fifth signals are signals with the same frequency band.

[0087] The first module 110 may include devices such as power amplifiers, filters, switches, and low-noise amplifiers. The first module 110 includes a first channel 111 operating at 900MHz and a second channel 112 operating at 1800MHz. The first channel 111 includes a power amplifier, filter, switch, and low-noise amplifier operating at 900MHz, and the second channel 112 includes a power amplifier, filter, switch, and low-noise amplifier operating at 1800MHz. The second module 120 may include a first switch 121 and a 1800MHz channel (third channel) 122, wherein the third channel 122 may include a power amplifier, filter, switch, and low-noise amplifier operating at 1800MHz.

[0088] When the electronic device 100 operates in the 900MHz GSM frequency band, it transmits the 900MHz GSM signal through the first channel 111 and the first antenna 130. The second harmonic signal (1800MHz signal, also known as the second signal) of the 900MHz GSM signal is transmitted to the first switch 121 via the phase shifter 150. By properly configuring the phase shifter 150, the second harmonic signal (third signal) reflected back through the first switch 121 cancels out the second signal, reducing the signal intensity radiated outward through the second antenna 140.

[0089] When electronic device 100 operates in the 1800MHz GSM frequency band, it transmits the 1800MHz GSM signal through the second channel 112, phase shifter 150, first switch 121, and second antenna 140. Because the insertion loss of phase shifter 150 is low, it does not lose the 1800MHz GSM signal, thus not reducing the performance of electronic device 100 operating in the 1800MHz GSM frequency band.

[0090] When electronic device 100 operates in the 1800MHz operating frequency band of LTE, electronic device 100 transmits LTE 1800MHz signals through the third channel 122 and the second antenna 140. The LTE 1800MHz signal does not pass through the phase shifter 150, thus affecting the performance of LTE 1800MHz.

[0091] The electronic device provided in the embodiments of this application includes a first PAMiD (first module), a second PAMiD (second module), a first antenna, a second antenna, and a phase shifter. The first PAMiD is a PAMiD for transmitting GSM signals, including a 900MHz channel (first channel) and an 1800MHz channel (second channel). The second PAMiD is a PAMiD for transmitting LTE signals, including a first switch and an 1800MHz channel (third channel). The first antenna is an antenna operating at a frequency of 900MHz, and the second antenna is an antenna operating at a frequency of 1800MHz. The first channel is connected to the first antenna, the second channel is connected to the second antenna via the phase shifter and the first switch, and the third channel is connected to the second antenna. The electronic device transmits a first signal through the first channel and the first antenna, a fourth signal through the second channel, the first switch, and the second antenna, and a fifth signal through the third channel and the second antenna. In this configuration, when the electronic device transmits the first signal, the first switch is in the off state. The phase shifter is used to adjust the phase of the second signal to the first phase, which is opposite to the phase of the third signal. The second signal refers to the harmonic signal radiated from the first signal to the phase shifter. The third signal refers to the signal reflected back to the first module by the first switch and then reflected back to the first switch. The second, fourth, and fifth signals are signals with the same frequency band. This allows the electronic device to reduce the harmonic signal radiated to the second antenna through the first switch when transmitting the first signal, as the phase shifter can change the phase of the harmonic signal (second signal) of the first signal. This reduces the signal radiated outward through the second antenna when the electronic device transmits the first signal, thereby improving the performance of the terminal device in CSE testing.

[0092] In addition, when the electronic device transmits the fourth signal through the second channel, the insertion loss of the phase shifter is low, so it will not affect the signal amplitude of the electronic device transmitting the fourth signal, thereby avoiding the performance degradation of the electronic device using the phase shifter in the embodiment of this application when it operates in the operating frequency band of the fourth signal.

[0093] This application also provides a method for suppressing harmonics, which is applied as described above. Figures 3 to 8 In the electronic device shown. The following is through... Figures 9 to 11 Let me explain in detail.

[0094] In one embodiment, such as Figure 9As shown, this method for suppressing harmonics is applied in an electronic device. The electronic device includes a first module, a second module, a first antenna, a second antenna, and a phase shifter. The first module includes a first channel and a second channel. The second module includes a first switch. The first channel is connected to the first antenna, and the second channel is connected to the second antenna through the phase shifter and the first switch. The method includes:

[0095] S101, Transmit the first signal through the first channel and the first antenna.

[0096] When the electronic device transmits the first signal, the first switch is in the off state.

[0097] S102. Adjust the phase of the second signal to the first phase using a phase shifter.

[0098] The first phase is opposite to the phase of the third signal. The second signal refers to the harmonic signal radiated by the first signal to the phase shifter. The third signal refers to the signal that is reflected back to the first module by the first switch and then reflected back to the first switch.

[0099] Optionally, the phase difference between the phases of the first and third signals is 180°.

[0100] Optionally, the second signal refers to the second harmonic signal radiated by the first signal to the phase shifter.

[0101] In one embodiment, such as Figure 10 As shown, this method for suppressing harmonics is applied in an electronic device. The electronic device includes a first module, a second module, a first antenna, a second antenna, and a phase shifter. The first module includes a first channel and a second channel. The second module includes a first switch. The first channel is connected to the first antenna, and the second channel is connected to the second antenna through the phase shifter and the first switch. The method includes:

[0102] S201, Transmit the first signal through the first channel and the first antenna.

[0103] When the electronic device transmits the first signal, the first switch is in the off state.

[0104] S202, The phase of the second signal is adjusted to the first phase by a phase shifter.

[0105] The first phase is opposite to the phase of the third signal. The second signal refers to the harmonic signal radiated by the first signal to the phase shifter. The third signal refers to the signal reflected by the second signal after passing through the first switch.

[0106] S203, transmit the fourth signal through the second channel, phase shifter, first switch and second antenna.

[0107] The fourth signal operates in the same frequency band as the second signal. When transmitting the fourth signal, the first switch is in the ON state.

[0108] In one embodiment, such as Figure 11 As shown, this method for suppressing harmonics is applied in an electronic device. The electronic device includes a first module, a second module, a first antenna, a second antenna, and a phase shifter. The first module includes a first channel and a second channel. The second module includes a first switch and a third channel. The first channel is connected to the first antenna. The second channel is connected to the second antenna via the phase shifter and the first switch. The third channel is connected to the second antenna. The method includes:

[0109] S301, Transmit the first signal through the first channel and the first antenna.

[0110] When the electronic device transmits the first signal, the first switch is in the off state.

[0111] S302, The phase of the second signal is adjusted to the first phase by a phase shifter.

[0112] The first phase is opposite to the phase of the third signal. The second signal refers to the harmonic signal radiated by the first signal to the phase shifter. The third signal refers to the signal reflected by the second signal after passing through the first switch.

[0113] S303, transmits the fourth signal through the second channel, phase shifter, first switch and second antenna.

[0114] The fourth signal operates in the same frequency band as the second signal. When transmitting the fourth signal, the first switch is in the ON state.

[0115] S304, transmit the fifth signal through the third channel and the second antenna.

[0116] The fifth signal has the same frequency band as the second signal.

[0117] The implementation principle and beneficial effects of the above-described method for suppressing harmonics are similar to those of the electronic device embodiments, and will not be repeated here.

[0118] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowchart may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0119] It is understood that, in order to achieve the above functions, the electronic device includes hardware and / or software modules that perform the respective functions. Based on the algorithmic steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is implemented in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application in conjunction with the embodiments, but such implementation should not be considered beyond the scope of this application.

[0120] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0121] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0122] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0123] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0124] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for example, the division of units is merely a logical functional division, and other division methods may exist in actual implementation; for example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0125] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0126] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0127] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electronic device, characterized in that, The electronic device includes a first module, a second module, a first antenna, a second antenna, and a phase shifter. The first module includes a first channel and a second channel. The second module includes a first switch. The first channel is connected to the first antenna. The second channel is connected to the second antenna through the phase shifter and the first switch. The electronic device transmits a first signal through the first channel and the first antenna. When the electronic device transmits the first signal, the first switch is in an open state. The phase shifter is used to adjust the phase of the second signal to a first phase. The first phase is opposite to the phase of the third signal. The second signal refers to the harmonic signal radiated by the first signal to the phase shifter. The third signal refers to the signal of the second signal reflected back to the first module after passing through the first switch, and then reflected back towards the first switch.

2. The electronic device according to claim 1, characterized in that, The phase difference between the first phase and the third signal is 180°.

3. The electronic device according to claim 1 or 2, characterized in that, The second signal refers to the second harmonic signal radiated by the first signal to the phase shifter.

4. The electronic device according to claim 1 or 2, characterized in that, The electronic device transmits a fourth signal through the second channel, the phase shifter, the first switch, and the second antenna, wherein the frequency band of the fourth signal is the same as that of the second signal.

5. The electronic device according to claim 1 or 2, characterized in that, The second module further includes a third channel, which is connected to the second antenna. The electronic device transmits a fifth signal through the third channel and the second antenna. The frequency band of the fifth signal is the same as that of the second signal.

6. A method for suppressing harmonics, characterized in that, The method is applied to an electronic device, which includes a first module, a second module, a first antenna, a second antenna, and a phase shifter. The first module includes a first channel and a second channel, and the second module includes a first switch. The first channel is connected to the first antenna, and the second channel is connected to the second antenna through the phase shifter and the first switch. The method includes: A first signal is transmitted through a first channel and a first antenna, wherein the first switch is in an open state when the electronic device transmits the first signal; The phase of the second signal is adjusted to the first phase by the phase shifter. The first phase is opposite to the phase of the third signal. The second signal refers to the harmonic signal radiated by the first signal to the phase shifter. The third signal refers to the signal of the second signal reflected back to the first module after passing through the first switch, and then reflected back to the first switch.

7. The method according to claim 6, characterized in that, The phase difference between the first phase and the third signal is 180°.

8. The method according to claim 6 or 7, characterized in that, The second signal refers to the second harmonic signal radiated by the first signal to the phase shifter.

9. The method according to claim 6 or 7, characterized in that, The method further includes: A fourth signal is transmitted through the second channel, the phase shifter, the first switch, and the second antenna, wherein the frequency band of the fourth signal is the same as that of the second signal, and the first switch is in the on state when transmitting the fourth signal.

10. The method according to claim 6 or 7, characterized in that, The second module further includes a third channel, which is connected to the second antenna, and the method further includes: A fifth signal is transmitted through the third channel and the second antenna, wherein the frequency band of the fifth signal is the same as that of the second signal.

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