Impedance matching method and electronic device

Abstract

This application relates to the field of antenna technology, providing an impedance matching method and an electronic device. The electronic device includes a first channel, a second channel, and a first antenna. The first channel includes a first phase shifter and a first circuit. The first antenna is connected to both the first channel and the second channel. The first circuit is connected to the first antenna via the first phase shifter. The electronic device transmits signals in a first frequency band through the first channel and the first antenna, and transmits signals in a second frequency band through the second channel and the first antenna. The first phase shifter is used to adjust the impedance of the first antenna when transmitting signals in the second frequency band. This improves the performance of the electronic device operating in both frequency bands, especially when the first antenna's narrow operating bandwidth only meets the performance requirements of the first frequency band but not the second frequency band.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and more specifically, to an impedance matching method and electronic device. Background Technology

[0002] Terminal devices using Frequency Division Duplexing (FDD) typically operate on at least two frequency bands. As the number of electronic components in a terminal device increases, the space allocated to the antenna decreases, leading to a situation where two operating frequency bands share a single antenna.

[0003] For example, the terminal device operates in frequency bands 1 and 2. When the spacing between frequency bands 1 and 2 is small, they can share a single antenna (e.g., antenna 1). Due to the reduced space within the terminal device, the space allocated to each antenna also decreases. This results in a narrower operating bandwidth for the antennas as the antenna size decreases, meaning the operating bandwidth of antenna 1 cannot cover both frequency bands 1 and 2. Consequently, the performance of antenna 1 cannot simultaneously meet the performance requirements of both frequency bands 1 and 2. If the performance of antenna 1 is biased towards frequency band 1, the performance of frequency band 2 degrades; conversely, if the performance of antenna 1 is biased towards frequency band 2, the performance of frequency band 1 degrades, leading to poor performance of the terminal device when operating in FDD mode.

[0004] Therefore, improving the performance of terminal devices when operating in FDD mode has become an urgent problem to be solved. Summary of the Invention

[0005] This application provides an impedance matching method and an electronic device that can improve the performance of terminal devices when operating in FDD mode.

[0006] In a first aspect, an electronic device includes a first channel, a second channel, and a first antenna. The first channel includes a first circuit and a first phase shifter. The first antenna is connected to both the first channel and the second channel. The first circuit is connected to the first antenna via the first phase shifter. The electronic device transmits signals of a first frequency band via the first channel and the first antenna, and transmits signals of a second frequency band via the second channel and the first antenna. The first phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the second frequency band.

[0007] The electronic device provided in this application includes a first channel, a second channel, and a first antenna. The first channel includes a first phase shifter and a first circuit. The first antenna is connected to both the first channel and the second channel. The first circuit is connected to the first antenna via the first phase shifter. The electronic device transmits signals in a first frequency band through the first channel and the first antenna, and transmits signals in a second frequency band through the second channel and the first antenna. The first phase shifter is used to adjust the impedance of the first antenna when transmitting signals in the second frequency band. This allows the first antenna to meet the performance requirements of the first frequency band but not the second frequency band when its operating bandwidth is narrow. By adjusting the impedance of the first antenna in the second frequency band, the performance of the first antenna can meet the performance requirements of the second frequency band. This is equivalent to enabling the first antenna to simultaneously meet the performance requirements of both the first and second frequency bands, thus improving the performance of the electronic device operating in both frequency bands.

[0008] In conjunction with the first aspect, in some implementations of the first aspect, the second channel includes a second circuit and a second phase shifter, the second circuit being connected to the first antenna via the second phase shifter, and the second phase shifter being used to adjust the impedance of the first antenna when the electronic device transmits a signal of the first frequency band.

[0009] The electronic device provided in the embodiments of this application includes a first channel, a second channel, and a first antenna. The first channel includes a first phase shifter and a first circuit, and the second channel includes a second phase shifter and a second circuit. The first antenna is connected to the first channel and the second channel, respectively. The first circuit is connected to the first antenna through the first phase shifter, and the second circuit is connected to the first antenna through the second phase shifter. The electronic device transmits signals of a first frequency band through the first channel and the first antenna, and transmits signals of a second frequency band through the second channel and the first antenna. The first phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the second frequency band, and the second phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the first frequency band. With the first antenna operating in the second frequency band, and the impedance of the first antenna adjusted by the first phase shifter, when the first antenna is operating in the first frequency band, the impedance of the first antenna can also be adjusted by the second phase shifter, thereby improving the performance of the first antenna in the first frequency band. This is equivalent to the electronic device provided in the embodiments of this application, which improves the performance of the first antenna in the second frequency band by the first phase shifter and improves the performance of the first antenna in the first frequency band by the second phase shifter, thereby enabling the first antenna to simultaneously meet the performance requirements of the first and second frequency bands, which is equivalent to further improving the performance of the electronic device operating in two frequency bands.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, the electronic device further includes a third phase shifter, through which the first antenna is connected to the first channel and the second channel respectively, and the third phase shifter is used to adjust the impedance of the first antenna in the first frequency band and the second frequency band.

[0011] The electronic device provided in the embodiments of this application includes a first channel, a second channel, a first antenna, and a third phase shifter. The first channel includes a first phase shifter and a first circuit, and the second channel includes a second phase shifter and a second circuit. The first antenna is connected to the first channel and the second channel respectively through the third phase shifter. The first circuit is connected to the first antenna through the first phase shifter, and the second circuit is connected to the first antenna through the second phase shifter. The electronic device transmits signals of a first frequency band through the first channel and the first antenna, and transmits signals of a second frequency band through the second channel and the first antenna. The first phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the second frequency band, the second phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the first frequency band, and the third phase shifter is used to adjust the impedance of the first antenna in the first and second frequency bands. Since the first or second phase shifter is equivalent to a parallel inductor or capacitor, the parallel capacitor or inductor has a corresponding rotation path on the Smith chart. Typically, the rotation path of the third phase shifter on the Smith chart is different from the rotation path of the parallel capacitor or inductor. Therefore, if the impedance of the first antenna cannot be adjusted to 50Ω by using parallel capacitors or inductors, the impedance of the first antenna can be adjusted to 50Ω by using a third phase shifter. Then, the impedance of the first antenna can be adjusted by using a first or second phase shifter to make the impedance of the first antenna closer to 50Ω, thereby improving the performance of the first antenna and thus improving the performance of electronic devices operating in two frequency bands.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, the electronic device further includes a third channel, which includes a third circuit and a fourth phase shifter. The third circuit is connected to the first antenna via the fourth phase shifter. The electronic device transmits signals of a third frequency band via the third channel and the first antenna. The fourth phase shifter is used to adjust the impedance of the first antenna when the electronic device transmits signals of the first frequency band and / or when the electronic device transmits signals of the second frequency band.

[0013] The electronic device provided in the embodiments of this application includes a first channel, a second channel, a third channel, a third phase shifter, and a first antenna. The first channel includes a first phase shifter and a first circuit; the second channel includes a second phase shifter and a second circuit; and the third channel includes a fourth phase shifter and a third circuit. The first antenna is connected to the first channel, the second channel, and the third channel via the third phase shifter. The first circuit is connected to the first antenna via the first phase shifter; the second circuit is connected to the first antenna via the second phase shifter; and the third circuit is connected to the first antenna via the fourth phase shifter. The electronic device transmits signals of a first frequency band via the first channel and the first antenna, transmits signals of a second frequency band via the second channel and the first antenna, and transmits signals of a third frequency band via the third channel and the first antenna. The first phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the second or third frequency band; the second phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the first or third frequency band; and the fourth phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the first or second frequency band. This is equivalent to the first antenna being used by the first, second, and third frequency bands. The first phase shifter improves the performance of the first antenna in the second or third frequency band, the second phase shifter improves the performance of the first antenna in the first or third frequency band, and the fourth phase shifter improves the performance of the first antenna in the second or third frequency band. This allows the first antenna to simultaneously meet the performance requirements of the first, second, and third frequency bands, which is equivalent to further improving the performance of electronic devices operating in multiple frequency bands.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the operating frequency band of the electronic device includes a first frequency band and a second frequency band.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, the electronic device is used to receive signals of a first frequency band via a first channel, and to receive signals of a second frequency band via a second channel.

[0016] Secondly, an impedance matching method is provided, which is applied in an electronic device. The electronic device includes a first channel, a second channel, and a first antenna. The first channel includes a first circuit and a first phase shifter. The first antenna is connected to both the first channel and the second channel. The first circuit is connected to the first antenna via the first phase shifter. The method includes:

[0017] The first frequency band signal is transmitted through the first channel and the first antenna;

[0018] The second frequency band signal is transmitted through the second channel and the first antenna, wherein...

[0019] The second frequency band signal is transmitted through the second channel and the first antenna, including:

[0020] When transmitting signals of the second frequency band through the second channel and the first antenna, the impedance of the first antenna is adjusted by the first phase shifter.

[0021] In conjunction with the second aspect, in some implementations of the second aspect, the second channel includes a second circuit and a second phase shifter. The second circuit is connected to the first antenna via the second phase shifter. The first channel and the first antenna transmit signals of the first frequency band, including: adjusting the impedance of the first antenna via the second phase shifter when transmitting signals of the first frequency band via the first channel and the first antenna.

[0022] In conjunction with the second aspect, in some implementations of the second aspect, the electronic device further includes a third phase shifter, wherein the first antenna is connected to the first channel and the second channel respectively through the third phase shifter, and the transmission of a first frequency band signal through the first channel and the first antenna includes: adjusting the impedance of the first antenna through the third phase shifter when transmitting the first frequency band signal through the first channel and the first antenna; and transmitting a second frequency band signal through the second channel and the first antenna includes: adjusting the impedance of the first antenna through the third phase shifter when transmitting the second frequency band signal through the second channel and the first antenna.

[0023] In conjunction with the second aspect, in some implementations of the second aspect, the second channel includes a second circuit and a second phase shifter, and the electronic device further includes a third channel, which includes a third circuit and a fourth phase shifter. The second circuit is connected to the first antenna via the second phase shifter, and the third circuit is connected to the first antenna via the fourth phase shifter. The method further includes: transmitting a signal of a third frequency band through the third channel and the first antenna; wherein transmitting a signal of the third frequency band through the third channel and the first antenna includes: adjusting the impedance of the first antenna via the first phase shifter and the second phase shifter when transmitting a signal of the third frequency band through the third channel and the first antenna; transmitting a signal of the first frequency band through the first channel and the first antenna includes: adjusting the impedance of the first antenna via the second phase shifter and the fourth phase shifter when transmitting a signal of the first frequency band through the first channel and the first antenna; transmitting a signal of the second frequency band through the second channel and the first antenna includes: adjusting the impedance of the first antenna via the first phase shifter and the fourth phase shifter when transmitting a signal of the second frequency band through the second channel and the first antenna.

[0024] In conjunction with the second aspect, in some implementations of the second aspect, the operating frequency band of the electronic device includes a first frequency band and a second frequency band.

[0025] In conjunction with the second aspect, in some implementations of the second aspect, the method further includes: receiving a signal of the first frequency band through the first channel; and receiving a signal of the second frequency band through the second channel.

[0026] This application implements an electronic device and impedance matching method, wherein the electronic device includes a first channel, a second channel, and a first antenna. The first channel includes a first phase shifter and a first circuit. The first antenna is connected to both the first channel and the second channel. The first circuit is connected to the first antenna via the first phase shifter. The electronic device transmits signals of a first frequency band through the first channel and the first antenna, and transmits signals of a second frequency band through the second channel and the first antenna. The first phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the second frequency band. This allows the first antenna to meet the performance requirements of the first frequency band but not the second frequency band when its operating bandwidth is narrow. By adjusting the impedance of the first antenna in the second frequency band, the performance of the first antenna can meet the performance requirements of the second frequency band. This is equivalent to enabling the first antenna to simultaneously meet the performance requirements of both the first and second frequency bands, thus improving the performance of the electronic device operating in both frequency bands. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a terminal device applicable to this application;

[0028] Figure 2 A schematic diagram illustrating a scenario applicable to impedance matching methods according to one embodiment of this application;

[0029] Figure 3 A schematic diagram illustrating a scenario applicable to impedance matching methods according to one embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of the phase shifter provided in an embodiment of this application;

[0032] Figure 6 An equivalent circuit diagram of an electronic device operating in a second frequency band is provided in the embodiments of this application;

[0033] Figure 7 This is a schematic diagram of the structure of an electronic device;

[0034] Figure 8 This is a schematic diagram of the structure of another electronic device provided in an embodiment of this application;

[0035] Figure 9 An equivalent circuit diagram of an electronic device provided in an embodiment of this application;

[0036] Figure 10 This is a schematic diagram of the structure of another electronic device provided in an embodiment of this application;

[0037] Figure 11 An equivalent circuit diagram of an electronic device provided in an embodiment of this application;

[0038] Figure 12 This is a schematic diagram of the structure of another electronic device provided in an embodiment of this application;

[0039] Figure 13 This is a schematic flowchart of an impedance matching method provided in an embodiment of this application;

[0040] Figure 14 This is a schematic flowchart of an impedance matching method provided in an embodiment of this application;

[0041] Figure 15 This is a schematic flowchart of an impedance matching method provided in an embodiment of this application;

[0042] Figure 16 This is a schematic flowchart of an impedance matching method provided in an embodiment of this application. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] Currently, with the development of Multiple Input Multiple Output (MIMO) technology, terminal devices typically operate on at least two frequency bands. As the number of electronic components in terminal devices increases, the space allocated to antennas decreases, leading to two frequency bands sharing a single antenna. For example, a terminal device may operate on frequency bands 1 and 2. If the interval between frequency bands 1 and 2 is small, they can share a single antenna (e.g., antenna 1). Due to the reduced space within the terminal device, the space allocated to each antenna also decreases. This results in a narrower operating bandwidth for the antenna as the antenna size decreases, causing antenna 1 to be unable to simultaneously meet the performance requirements of both frequency bands 1 and 2. When the performance of antenna 1 is biased towards frequency band 1, the performance of frequency band 2 degrades; conversely, when the performance of antenna 1 is biased towards frequency band 2, the performance of frequency band 1 degrades, resulting in poor performance of the terminal device when operating in FDD mode.

[0046] In view of this, embodiments of this application provide an electronic device and an impedance matching method, including a first channel, a second channel, and a first antenna. The first channel includes a first phase shifter and a first circuit. The first antenna is connected to both the first channel and the second channel. The first circuit is connected to the first antenna via the first phase shifter. The electronic device transmits signals in a first frequency band via the first channel and the first antenna, and transmits signals in a second frequency band via the second channel and the first antenna. The first phase shifter is used to adjust the impedance of the first antenna when transmitting signals in the second frequency band. This allows the first antenna to meet the performance requirements of the first frequency band but not the second frequency band when its operating bandwidth is narrow. By adjusting the impedance of the first antenna in the second frequency band using the first phase shifter, the performance of the first antenna can meet the performance requirements of the second frequency band. This is equivalent to enabling the first antenna to simultaneously meet the performance requirements of both the first and second frequency bands, thus improving the performance of the electronic device operating in both frequency bands.

[0047] The impedance matching method provided in this application can be applied to electronic devices. Optionally, the electronic device includes a terminal device, which may also be referred to as 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.

[0048] For example, Figure 1 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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).

[0060] 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.

[0061] The software system of electronic device 100 can adopt a layered architecture, event-driven architecture, microkernel architecture, microservice architecture, or cloud architecture.

[0062] The application scenarios provided by the embodiments of this application are described below with reference to the accompanying drawings.

[0063] Figure 2 This is a schematic diagram illustrating a scenario applicable to impedance matching methods according to one embodiment of this application. Figure 2As shown, the electronic device can refer to a terminal device, such as a mobile phone. This terminal device includes a first channel, a second channel, and a first antenna. The first antenna is connected to both the first and second channels. The terminal device operates in two frequency bands: band 1 and band 2. The terminal device transmits signals of band 1 through the first channel and the first antenna, and transmits signals of band 2 through the second channel and the first antenna. Essentially, bands 1 and 2 of the terminal device share a single antenna (the first antenna).

[0064] It should be understood that the terminal device can operate on more than two frequency bands. When the number of operating frequency bands of the terminal device is greater than two, multiple frequency bands can share one antenna, or two antennas can share one antenna. This application embodiment does not impose any restrictions on this.

[0065] For example, when the operating frequency bands of the terminal device include frequency band 1, frequency band 2, frequency band 3, frequency band 4 and frequency band 5, frequency band 1 and frequency band 2 can share antenna 1, and frequency band 3, frequency band 4 and frequency band 5 can share antenna 2.

[0066] For example, when the operating frequency bands of the terminal device include frequency band 1, frequency band 2, frequency band 3, frequency band 4 and frequency band 5, frequency band 1, frequency band 2, frequency band 3, frequency band 4 and frequency band 5 share antenna 1.

[0067] Figure 3 This is a schematic diagram illustrating a scenario applicable to impedance matching methods according to one embodiment of this application. Figure 3 As shown, the system includes electronic device 1, electronic device 2, and electronic device 3. Electronic device 1 is connected to both electronic device 2 and electronic device 3. Electronic device 2 outputs a first signal, and electronic device 3 outputs a second signal. The first signal can be used for satellite positioning, and the second signal can be used for navigation via the Global Positioning System (GPS). The first and second signals operate on different frequency bands. Electronic device 1 includes a first channel and a second channel. Electronic device 1 receives the first signal from electronic device 2 through the first channel and then transmits it through a first antenna. Similarly, electronic device 1 receives the second signal from electronic device 3 through the second channel and then transmits it through the first antenna. This effectively means that frequency band 1 and frequency band 2 share the first antenna.

[0068] It should be understood that the above are illustrative examples of application scenarios and do not limit the application scenarios of this application in any way.

[0069] The following is combined with Figures 4 to 12 The electronic devices and impedance matching methods provided in the embodiments of this application will be described in detail.

[0070] Figure 4This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application, such as... Figure 4 As shown, the electronic device 100 includes a first channel 110, a second channel 120, and a first antenna 130. The first channel 110 includes a first phase shifter 111 and a first circuit 112. The first antenna 130 is connected to the first channel 110 and the second channel 120, respectively. The first circuit 112 is connected to the first antenna 130 through the first phase shifter 111. The electronic device 100 transmits signals of a first frequency band through the first channel 110 and the first antenna 130, and transmits signals of a second frequency band through the second channel 120 and the first antenna 130. The first phase shifter 111 is used to adjust the impedance of the first antenna 130 when transmitting signals of the second frequency band.

[0071] The first channel 110 includes a first circuit 112 and a first phase shifter 111. The first circuit 112 may include radio frequency switches, filters, etc. It should be understood that the electronic device transmits signals in the first frequency band through the first channel 110 and the first antenna 130; that is, the operating frequency band of the first circuit 112 and the first phase shifter 111 in the first channel 110 is the first frequency band. The operating frequency band of the electronic devices (e.g., radio frequency switches, filters) in the first circuit 112 is also the first frequency band. For example, the filter in the first circuit 112 may be a bandpass filter that performs bandpass filtering on the first frequency band. This means that signals within the first frequency band can pass through the filter normally, while signals outside the first frequency band are suppressed by the filter.

[0072] Typically, because filters usually have high isolation, they are placed on the first circuit 112 at the closest possible position to the first antenna 130. This prevents the first circuit 112 from participating in the impedance matching of the first antenna 130 when the electronic device 100 transmits signals in the second frequency band, thus avoiding affecting the impedance of the first antenna 130 and consequently degrading its performance.

[0073] The first channel 110 may also include a first phase shifter 111.

[0074] It should be understood that the first phase shifter 111 can adjust the impedance of the first antenna 130 when the electronic device 100 transmits signals in the second frequency band, so that the impedance of the first antenna 130 is closer to 50Ω, thereby improving the performance of the first antenna 130. This is equivalent to using the first channel 110 as a matching circuit for the first antenna 130 in the second frequency band, and adjusting the impedance of the first antenna 130 by adjusting the first phase shifter 111.

[0075] The first phase shifter 111 can be a circuit network composed of capacitors and inductors. For example... Figure 5As shown, the first phase shifter 111 can be a π-type circuit network composed of inductors and capacitors. Through the first phase shifter 111, the impedance of the first antenna 130 in the second frequency band can be adjusted, thereby making the impedance of the first antenna 130 in the second frequency band closer to 50Ω, and thus making the performance of the first antenna 130 in the second frequency band better.

[0076] It should be understood that the first phase shifter 111 can increase the phase (equivalent to the impedance rotating clockwise on the Smith chart) or decrease the phase (equivalent to the impedance rotating counterclockwise on the Smith chart), and the embodiments of this application do not limit this.

[0077] For example, such as Figure 5 As shown in (a), the first phase shifter 111 is a π-type circuit network consisting of a capacitor and two inductors. The capacitance is 4pF and the inductance is 17nH. The first phase shifter 111 increases the phase of the first antenna impedance, which is equivalent to rotating the impedance of the first antenna clockwise on the Smith chart.

[0078] For example, such as Figure 5 As shown in (b), the first phase shifter 111 is a π-type circuit network consisting of two capacitors and one inductor. The capacitance of the capacitor is 0.7pF, and the inductance of the inductor is 3nH. The first phase shifter 111 reduces the phase of the impedance of the first antenna, which is equivalent to rotating the impedance of the first antenna counterclockwise on the Smith chart.

[0079] The second channel 120 may also include a second circuit 121, which may include electronic devices such as radio frequency switches and filters. It should be understood that the electronic device transmits signals in the second frequency band through the second channel 120 and the first antenna 130; that is, the operating frequency band of the electronic devices (e.g., radio frequency switches, filters) in the second circuit 121 is the second frequency band. For example, the filter in the second circuit 121 may be a bandpass filter that performs bandpass filtering on the second frequency band. This means that signals within the second frequency band can pass through the filter normally, while signals outside the second frequency band are suppressed by the filter.

[0080] Typically, because filters usually have high isolation, they are placed on the second circuit 121 at the closest possible position to the first antenna 130. This prevents the second circuit 121 from participating in the impedance matching of the first antenna 130 when the electronic device 100 transmits signals in the first frequency band, thus avoiding affecting the impedance of the first antenna 130 and consequently degrading its performance.

[0081] Since the electronic device transmits signals of the first frequency band through the first channel 110 and the first antenna 130, and transmits signals of the second frequency band through the second channel 120 and the first antenna 130, it is equivalent to the first and second frequency bands sharing the first antenna 130 for signal transmission. Therefore, the operating bandwidth requirement of the first antenna 130 is relatively high. That is to say, the operating bandwidth of the first antenna 130 must be greater than a preset threshold to simultaneously meet the requirements of the first and second frequency bands. However, due to the limited available space in the electronic device, the operating bandwidth of the antenna also narrows. Therefore, the operating bandwidth of the first antenna 130 is usually less than the preset threshold. This results in the performance of the first antenna 130 not being able to simultaneously meet the requirements of the first and second frequency bands. The electronic device provided in the embodiments of this application, when the electronic device is operating in the second frequency band, utilizes the first channel 110 as a matching circuit for the first antenna 130 to adjust the impedance of the first antenna 130, thereby improving the performance of the first antenna 130 in the second frequency band and meeting the performance requirements of the second frequency band.

[0082] The following is through Figure 6 and Figure 7 The principle of how the impedance of the first antenna 130 is adjusted by the first phase shifter 111 is explained.

[0083] Figure 6 for Figure 4 The electronic device 100 shown is illustrated in the equivalent circuit diagram when operating in the second frequency band. Figure 6 As shown, when electronic device 100 operates in the second frequency band, looking from the second path 120 to the first path 110, it is equivalent to having a capacitor connected in parallel. Figure 6 As shown, the circles in the figure represent the position of the first antenna's impedance on the Smith chart. The impedance position of the first antenna without the first phase shifter is shown below. Figure 6 The position indicated by the dashed line in the diagram represents the location where the impedance of the first antenna of the first phase shifter is increased. Figure 6 The position indicated by the solid line. From Figure 6 As can be seen from the diagram, after adding the first phase shifter, the impedance of the first antenna moves towards the center of the circle, which is equivalent to getting closer to 50Ω.

[0084] It should be understood that by properly adjusting the phase shifter, when the electronic device 100 is operating in the second frequency band, looking from the second path 120 to the first path 110, it can also be equivalent to having an inductor connected in parallel.

[0085] For example, an electronic device without the addition of the first phase shifter 110, such as Figure 7 As shown. Among them, Figure 7 The electronic devices shown are Figure 4 Compared to the electronic device shown, only the first phase shifter 111 is added to the first channel 110, and the rest are the same.

[0086] like Figure 7 When the impedance of the first antenna 130 in the illustrated electronic device is above 50Ω in the second frequency band, the first phase shifter 110 can be adjusted to an equivalent inductance, which is equivalent to... Figure 4 The impedance of the first antenna 130 of the electronic device shown is adjusted to the lower left, so that the impedance of the first antenna 130 is closer to 50Ω, thereby making the performance of the first antenna 130 better.

[0087] like Figure 7 When the impedance of the first antenna 130 in the illustrated electronic device is above 50Ω in the second frequency band, the first phase shifter 110 can be adjusted to the equivalent capacitance, which is equivalent to... Figure 4 The impedance of the first antenna 130 of the electronic device shown is adjusted to the lower right, so that the impedance of the first antenna 130 is closer to 50Ω, thereby making the performance of the first antenna 130 better.

[0088] The electronic device provided in this application includes a first channel, a second channel, and a first antenna. The first channel includes a first phase shifter and a first circuit. The first antenna is connected to both the first channel and the second channel. The first circuit is connected to the first antenna via the first phase shifter. The electronic device transmits signals in a first frequency band through the first channel and the first antenna, and transmits signals in a second frequency band through the second channel and the first antenna. The first phase shifter is used to adjust the impedance of the first antenna when transmitting signals in the second frequency band. This allows the first antenna to meet the performance requirements of the first frequency band but not the second frequency band when its operating bandwidth is narrow. By adjusting the impedance of the first antenna in the second frequency band, the performance of the first antenna can meet the performance requirements of the second frequency band. This is equivalent to enabling the first antenna to simultaneously meet the performance requirements of both the first and second frequency bands, thus improving the performance of the electronic device operating in both frequency bands.

[0089] In one possible scenario, the electronic device itself can operate simultaneously in both the first and second frequency bands, such as... Figure 2 As shown. At this time, the operating frequency bands of the electronic device (the first frequency band and the second frequency band) share a single antenna (the first antenna).

[0090] In one possible scenario, an electronic device can receive signals in a first and second frequency band from other electronic devices, and then transmit the received signals through an antenna on the electronic device. For example, such as Figure 3As shown, electronic device 1 includes a first antenna, a first channel, and a second channel. Electronic device 2 can be a satellite antenna ground station for outputting satellite signals, and electronic device 3 can be a GPS positioning system for outputting GPS positioning signals. The first channel of electronic device 1 is connected to electronic device 2 to receive satellite signals, and then electronic device 1 transmits the satellite signals through the first antenna; the second channel of electronic device 1 is connected to electronic device 3 to receive GPS positioning signals, and then electronic device 1 transmits the GPS positioning signals through the first antenna.

[0091] To further improve the performance of the first antenna, a second phase shifter can be added to the second channel to adjust the impedance of the first antenna when it operates in the first frequency band, so that the performance of the first antenna can meet the performance requirements of the first frequency band. The following is a description of... Figure 8 and Figure 9 The embodiments shown will be described in detail below.

[0092] Figure 8 A schematic diagram of the structure of an electronic device provided in another embodiment of this application, such as... Figure 8 As shown, the electronic device 100 includes a first channel 110, a second channel 120, and a first antenna 130. The first channel 110 includes a first phase shifter 111 and a first circuit 112. The second channel 120 includes a second phase shifter 121 and a second circuit 122. The first antenna 130 is connected to the first channel 110 and the second channel 120 respectively. The first circuit 112 is connected to the first antenna 130 through the first phase shifter 111, and the second circuit 122 is connected to the first antenna 130 through the second phase shifter 121. The electronic device 100 transmits signals of a first frequency band through the first channel 110 and the first antenna 130, and transmits signals of a second frequency band through the second channel 120 and the first antenna 130. The first phase shifter 111 is used to adjust the impedance of the first antenna 130 when transmitting signals of the second frequency band, and the second phase shifter 121 is used to adjust the impedance of the first antenna 130 when transmitting signals of the first frequency band.

[0093] The second channel 120 includes a second phase shifter 121 and a second circuit 122. The second circuit 122 may include radio frequency switches, filters, etc. Electronic devices transmit signals in the second frequency band through the second channel 120 and the first antenna 130. That is, the operating frequency band of the second circuit 122 and the first phase shifter 111 in the second channel 120 is the second frequency band. The operating frequency band of the electronic devices (e.g., radio frequency switches, filters) in the second circuit 122 is also the second frequency band. For example, the filter in the second circuit 122 can be a bandpass filter for the second frequency band; essentially, signals within the second frequency band can pass through the filter normally, while signals outside the second frequency band are suppressed by the filter.

[0094] Typically, because filters usually have high isolation, they are placed on the second circuit 122 at the closest possible position between it and the first antenna 130. This prevents the second circuit 122 from participating in the impedance matching of the first antenna 130 when the electronic device 100 transmits signals in the second frequency band, thus avoiding affecting the impedance of the first antenna 130 and consequently degrading its performance.

[0095] It should be understood that the second phase shifter 121 can adjust the impedance of the first antenna 130 when the electronic device 100 transmits signals in the second frequency band, so that the impedance of the first antenna 130 is closer to 50Ω, thereby improving the performance of the first antenna 130. This is equivalent to using the second channel 120 as a matching circuit for the first antenna 130 in the first frequency band, and adjusting the impedance of the first antenna 130 by adjusting the second phase shifter 121.

[0096] The second phase shifter 121 can be a circuit network composed of capacitors and inductors. For example... Figure 5 As shown, the second phase shifter 121 can be a π-type circuit network composed of inductors and capacitors. Through the second phase shifter 121, the impedance of the first antenna 130 in the first frequency band can be adjusted, thereby making the impedance of the first antenna 130 in the first frequency band closer to 50Ω, and thus improving the performance of the first antenna 130 in the first frequency band.

[0097] It should be understood that the second phase shifter 121 can increase the phase (equivalent to rotating the impedance clockwise on the Smith chart) or decrease the phase (equivalent to rotating the impedance counterclockwise on the Smith chart), and the embodiments of this application do not limit this.

[0098] The principle of adjusting the impedance of the first antenna 130 using the first phase shifter 111 and the second phase shifter 121 will be explained below.

[0099] Figure 9 for Figure 8 The equivalent circuit diagram of the electronic device 100 shown is as follows. Figure 9 As shown, when electronic device 100 operates in the first frequency band, looking from the first path 110 to the second path 120, it is equivalent to having an inductor connected in parallel. For example... Figure 9 As shown, the circles in the figure represent the impedance of the first antenna on the Smith chart. The impedance position of the first antenna without the second phase shifter is shown below. Figure 9 The position indicated by the dashed line in the diagram represents the impedance position of the first antenna increased by the second phase shifter. Figure 9 The position indicated by the solid line. From Figure 9 As can be seen, after adding the second phase shifter, the impedance of the first antenna moves towards the center, which is equivalent to getting closer to 50Ω.

[0100] It should be understood that by properly adjusting the phase shifter, when the electronic device 100 is operating in the first frequency band, looking from the first path 110 to the second path 120 can also be equivalent to having a capacitor connected in parallel.

[0101] When electronic device 100 operates in the second frequency band, looking from the second path 120 to the first path 110 is equivalent to having a capacitor connected in parallel. For example... Figure 6 As shown, the circles in the figure represent the position of the first antenna's impedance on the Smith chart. The impedance position of the first antenna without the first phase shifter is shown below. Figure 6 The position indicated by the dashed line in the diagram represents the location where the impedance of the first antenna of the first phase shifter is increased. Figure 6 The position indicated by the solid line. From Figure 6 As can be seen from the diagram, after adding the first phase shifter, the impedance of the first antenna moves towards the center of the circle, which is equivalent to getting closer to 50Ω.

[0102] It should be understood that by properly adjusting the phase shifter, when the electronic device 100 is operating in the second frequency band, looking from the second path 120 to the first path 110, it can also be equivalent to having an inductor connected in parallel.

[0103] For example, an electronic device without the addition of the first phase shifter 110, such as Figure 7 As shown. Among them, Figure 7 The electronic devices shown are Figure 8 Compared to the electronic device shown, only a first phase shifter 111 is added to the first channel 110 and a second phase shifter 121 is added to the second channel 120; the rest are the same.

[0104] like Figure 7 When the impedance of the first antenna 130 in the illustrated electronic device is above 50Ω in the second frequency band, Figure 7 Adding a first phase shifter 111 to the electronic device shown, we obtain Figure 8 The first channel 110 of the electronic device 100 shown. By adjusting the matching of the first phase shifter 111, the first phase shifter 111 is made equivalent to an inductor in the second frequency band, which is equivalent to... Figure 8 The impedance of the first antenna 130 of the electronic device shown is adjusted to the lower right, so that the impedance of the first antenna 130 is closer to 50Ω, thereby making the performance of the first antenna 130 better.

[0105] like Figure 7 When the impedance of the first antenna 130 in the illustrated electronic device is below 50Ω in the first frequency band, Figure 7 Adding a second phase shifter 121 to the electronic device shown, we obtain Figure 8The second channel 120 of the electronic device 100 shown. By adjusting the matching of the second phase shifter 121, the second phase shifter 121 is made equivalent to a capacitor in the first frequency band, which is equivalent to... Figure 8 The impedance of the first antenna 130 of the electronic device shown is adjusted to the upper right, so that the impedance of the first antenna 130 is closer to 50Ω, thereby making the performance of the first antenna 130 better.

[0106] The electronic device provided in the embodiments of this application includes a first channel, a second channel, and a first antenna. The first channel includes a first phase shifter and a first circuit, and the second channel includes a second phase shifter and a second circuit. The first antenna is connected to the first channel and the second channel, respectively. The first circuit is connected to the first antenna through the first phase shifter, and the second circuit is connected to the first antenna through the second phase shifter. The electronic device transmits signals of a first frequency band through the first channel and the first antenna, and transmits signals of a second frequency band through the second channel and the first antenna. The first phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the second frequency band, and the second phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the first frequency band. With the first antenna operating in the second frequency band and its impedance adjusted by the first phase shifter, when the first antenna is operating in the first frequency band, its impedance can also be adjusted by the second phase shifter, thus improving the performance of the first antenna in the first frequency band. This is equivalent to the electronic device provided in this application, which improves the performance of the first antenna in the second frequency band by the first phase shifter and simultaneously improves the performance of the first antenna in the first frequency band by the second phase shifter. This enables the first antenna to simultaneously meet the performance requirements of the first and second frequency bands, which is equivalent to further improving the performance of the electronic device operating in two frequency bands at the same time.

[0107] Since either the first or second phase shifter can be equivalent to an inductor or capacitor, they can adjust the impedance of the first antenna. Antenna impedance typically consists of a real part and an imaginary part. In one possible scenario, the imaginary part of the first antenna's impedance can be adjusted to around 50Ω using the first and second phase shifters, but the real part cannot. Therefore, a phase shifter needs to be connected in series with the first antenna to adjust its impedance. The following will explain... Figure 10 The embodiments shown will be described in detail.

[0108] Figure 10 This is a schematic diagram of the structure of an electronic device provided in another embodiment of this application, such as... Figure 10As shown, the electronic device 100 includes a first channel 110, a second channel 120, a first antenna 130, and a third phase shifter 140. The first channel 110 includes a first phase shifter 111 and a first circuit 112. The second channel 120 includes a second phase shifter 121 and a second circuit 122. The first antenna 130 is connected to the first channel 110 and the second channel 120 respectively through the third phase shifter 140. The first circuit 112 is connected to the first antenna 130 through the first phase shifter 111, and the second circuit 122 is connected to the first antenna 130 through the second phase shifter 121. Device 121 is connected to the first antenna 130; electronic device 100 transmits signals of the first frequency band through the first channel 110 and the first antenna 130, and transmits signals of the second frequency band through the second channel 120 and the first antenna 130. The first phase shifter 111 is used to adjust the impedance of the first antenna 130 when transmitting signals of the second frequency band, the second phase shifter 121 is used to adjust the impedance of the first antenna 130 when transmitting signals of the first frequency band, and the third phase shifter 140 is used to adjust the impedance of the first antenna 130 in the first frequency band and the second frequency band.

[0109] It should be understood that the third phase shifter 140 can adjust the phase of the impedance of the first antenna 130 when the electronic device 100 transmits signals in the first or second frequency band, so that the impedance of the first antenna 130 is closer to 50Ω, thereby improving the performance of the first antenna 130. Since the first antenna 130 is connected to the first channel 110 and the second channel 120 respectively through the third phase shifter 140, the third phase shifter 140 can change the phase of the impedance of the first antenna 130. Furthermore, since the first phase shifter 111 and the second phase shifter 121 can be equivalent to a capacitor or inductor connected in parallel, the rotation path of parallel electronic devices on the Smith chart is different from the rotation path of phase change on the original Smith chart. Therefore, the impedance of the first antenna 130 can be adjusted to a position that the first phase shifter 111 or the second phase shifter 121 cannot achieve.

[0110] For example, Figure 11 As shown, when the electronic device 100 operates in the first frequency band, the second phase shifter 121 can be equivalent to a capacitor connected in parallel. When the electronic device 100 operates in the second frequency band, the first phase shifter 111 can be equivalent to a capacitor connected in parallel. The impedance is reduced by the first phase shifter 111 and the second phase shifter 121 as follows: Figure 11As shown in Smith chart A, there is still a certain distance between the impedance of the first channel 110 and the second channel 120 and the 50Ω impedance. Since the parallel capacitor rotates along a preset path on the Smith chart, simply adjusting the first phase shifter 111 and the second phase shifter 121 is insufficient to adjust the impedance of the first antenna 130 to 50Ω. Therefore, the impedance of the first antenna 130 can be adjusted to 50Ω by changing the phase of the impedance using the third phase shifter 140, as shown below. Figure 11 The Smith chart B is shown in the figure.

[0111] The third phase shifter 140 can be a circuit network composed of capacitors and inductors. For example... Figure 5 As shown, the third phase shifter 140 can be a π-type circuit network composed of inductors and capacitors. Through the third phase shifter 140, the phase of the impedance of the first antenna 130 in the first frequency band can be adjusted, thereby making the impedance of the first antenna 130 in the first frequency band closer to 50Ω, and thus improving the performance of the first antenna 130 in the first frequency band. Similarly, through the third phase shifter 140, the phase of the impedance of the first antenna 130 in the second frequency band can be adjusted, thereby making the impedance of the first antenna 130 in the second frequency band closer to 50Ω, and thus improving the performance of the first antenna 130 in the first frequency band.

[0112] It should be understood that the third phase shifter 140 can increase the phase (equivalent to rotating the impedance clockwise on the Smith chart) or decrease the phase (equivalent to rotating the impedance counterclockwise on the Smith chart), and the embodiments of this application do not limit this.

[0113] The electronic device provided in the embodiments of this application includes a first channel, a second channel, a first antenna, and a third phase shifter. The first channel includes a first phase shifter and a first circuit, and the second channel includes a second phase shifter and a second circuit. The first antenna is connected to the first channel and the second channel respectively through the third phase shifter. The first circuit is connected to the first antenna through the first phase shifter, and the second circuit is connected to the first antenna through the second phase shifter. The electronic device transmits signals of a first frequency band through the first channel and the first antenna, and transmits signals of a second frequency band through the second channel and the first antenna. The first phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the second frequency band, the second phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the first frequency band, and the third phase shifter is used to adjust the impedance of the first antenna in the first and second frequency bands. Since the first or second phase shifter is equivalent to a parallel inductor or capacitor, the parallel capacitor or inductor has a corresponding rotation path on the Smith chart. Typically, the rotation path of the third phase shifter on the Smith chart is different from the rotation path of the parallel capacitor or inductor. Therefore, if the impedance of the first antenna cannot be adjusted to 50Ω by using parallel capacitors or inductors, the impedance of the first antenna can be adjusted to 50Ω by using a third phase shifter. Then, the impedance of the first antenna can be adjusted by using a first or second phase shifter to make the impedance of the first antenna closer to 50Ω, thereby improving the performance of the first antenna and thus improving the performance of electronic devices operating in two frequency bands.

[0114] In one possible scenario, the electronic device operates simultaneously in multiple frequency bands. For example, the electronic device operates simultaneously in three frequency bands, all sharing a single antenna. These three frequency bands include a first band, a second band, and a third band, and the antenna in the electronic device includes a first antenna. The first, second, and third bands share the first antenna. In this case, the electronic device may include a first channel, a second channel, a third channel, and the first antenna. The electronic device transmits signals of the first frequency band through the first channel and the first antenna, transmits signals of the second frequency band through the second channel and the first antenna, and transmits signals of the third frequency band through the third channel and the first antenna. Based on the above embodiment, the third channel may also include a third circuit and a fourth phase shifter. When the electronic device operates in the first frequency band, the impedance of the first antenna in the first frequency band is adjusted by the fourth phase shifter to improve the performance of the first antenna in the first frequency band; or when the electronic device operates in the second frequency band, the impedance of the first antenna in the second frequency band is adjusted by the fourth phase shifter to improve the performance of the first antenna in the second frequency band.

[0115] It should be understood that the above example of three frequency bands sharing one antenna in an electronic device is merely one example. In one possible scenario, more frequency bands in an electronic device could also share one antenna. For example, four frequency bands or seven frequency bands in an electronic device could share one antenna.

[0116] In electronic devices, the principle of adjusting the antenna impedance by using phase shifters on different paths when multiple frequency bands share one antenna is similar to the principle of adjusting the antenna impedance by using phase shifters when three frequency bands share one antenna. It will not be elaborated here.

[0117] The following is through Figure 12 The illustrated embodiment describes in detail how to adjust the impedance of the first antenna using a phase shifter when the electronic device is operating simultaneously in the first, second, and third frequency bands.

[0118] Figure 12 A schematic diagram of the structure of an electronic device provided in another embodiment of this application, such as... Figure 12 As shown, the electronic device 100 includes a first channel 110, a second channel 120, a first antenna 130, a third phase shifter 140, and a third channel 150. The first channel 110 includes a first phase shifter 111 and a first circuit 112; the second channel 120 includes a second phase shifter 121 and a second circuit 122; and the third channel 150 includes a fourth phase shifter 151 and a third circuit 152. The first antenna 130 is connected to the first channel 110, the second channel 120, and the third channel 150 via the third phase shifter 140. The first circuit 112 is connected to the first antenna 130 via the first phase shifter 111, the second circuit 122 is connected to the first antenna 130 via the second phase shifter 121, and the third circuit 152 is connected to the third channel 150 via the fourth phase shifter 151. 1. Connected to the first antenna; the electronic device 100 transmits signals of the first frequency band through the first channel 110 and the first antenna 130, transmits signals of the second frequency band through the second channel 120 and the first antenna 130, and transmits signals of the third frequency band through the third channel 150 and the first antenna 130. The first phase shifter 111 is used to adjust the impedance of the first antenna 130 when transmitting signals of the second or third frequency band. The second phase shifter 121 is used to adjust the impedance of the first antenna 130 when transmitting signals of the first or third frequency band. The fourth phase shifter 151 is used to adjust the impedance of the first antenna 130 when transmitting signals of the first or second frequency band. The third phase shifter 140 is used to adjust the impedance of the first antenna 130 in the first and second frequency bands.

[0119] The third channel 150 includes a fourth phase shifter 151 and a third circuit 152. The third circuit 152 may include radio frequency switches, filters, etc. Electronic devices transmit signals in the third frequency band through the third channel 150 and the first antenna 130. That is, the operating frequency band of the third circuit 152 and the fourth phase shifter 151 in the third channel 150 is the third frequency band. The operating frequency band of the electronic devices (e.g., radio frequency switches, filters) in the third circuit 152 is also the third frequency band. For example, the filter in the third circuit 152 can be a bandpass filter for the third frequency band; essentially, signals within the third frequency band can pass through the filter normally, while signals outside the third frequency band are suppressed by the filter.

[0120] Typically, because filters usually have high isolation, they are placed on the third circuit 152 at the closest possible position between it and the first antenna 130. This prevents the third circuit 152 from participating in the impedance matching of the first antenna 130 when the electronic device 100 transmits signals in the third frequency band, thus avoiding affecting the impedance of the first antenna 130 and consequently degrading its performance.

[0121] It should be understood that the fourth phase shifter 151 can adjust the impedance of the first antenna 130 when the electronic device 100 transmits signals in the first or second frequency band, so that the impedance of the first antenna 130 is closer to 50Ω, thereby improving the performance of the first antenna 130. This is equivalent to using the third channel 150 as a matching circuit for the first antenna 130 in the first frequency band, and adjusting the impedance of the first antenna 130 by adjusting the fourth phase shifter 151.

[0122] The fourth phase shifter 151 can be a circuit network composed of capacitors and inductors. For example... Figure 5 As shown, the fourth phase shifter 151 can be a π-type circuit network composed of inductors and capacitors. Through the fourth phase shifter 151, the impedance of the first antenna 130 in the first frequency band can be adjusted, thereby making the impedance of the first antenna 130 in the first frequency band closer to 50Ω, thus improving the performance of the first antenna 130 in the first frequency band; or, through the fourth phase shifter 151, the impedance of the first antenna 130 in the second frequency band can be adjusted, thereby making the impedance of the first antenna 130 in the second frequency band closer to 50Ω, thus improving the performance of the first antenna 130 in the second frequency band.

[0123] It should be understood that the fourth phase shifter 151 can increase the phase (equivalent to rotating the impedance clockwise on the Smith chart) or decrease the phase (equivalent to rotating the impedance counterclockwise on the Smith chart), and the embodiments of this application do not limit this.

[0124] It should be understood that when the electronic device 100 operates in three frequency bands, when the electronic device 100 operates in the first frequency band, the impedance of the first antenna 130 in the first frequency band can be adjusted by the second phase shifter 121 and the fourth phase shifter 151; when the electronic device 100 operates in the second frequency band, the impedance of the first antenna 130 in the second frequency band can be adjusted by the first phase shifter 111 and the fourth phase shifter 151; when the electronic device 100 operates in the third frequency band, the impedance of the first antenna 130 in the first frequency band can be adjusted by the first phase shifter 111 and the second phase shifter 121.

[0125] It should be understood that electronic devices may also include more than three channels, which can share a single antenna. Each channel is used to transmit signals in different frequency bands, which is equivalent to multiple frequency bands sharing a single antenna. The solution provided in this application is also applicable to this situation, and its implementation principle and beneficial effects are similar to those of the above embodiments, and will not be repeated here.

[0126] The electronic device provided in the embodiments of this application includes a first channel, a second channel, a third channel, a third phase shifter, and a first antenna. The first channel includes a first phase shifter and a first circuit; the second channel includes a second phase shifter and a second circuit; and the third channel includes a fourth phase shifter and a third circuit. The first antenna is connected to the first channel, the second channel, and the third channel via the third phase shifter. The first circuit is connected to the first antenna via the first phase shifter; the second circuit is connected to the first antenna via the second phase shifter; and the third circuit is connected to the first antenna via the fourth phase shifter. The electronic device transmits signals of a first frequency band via the first channel and the first antenna, transmits signals of a second frequency band via the second channel and the first antenna, and transmits signals of a third frequency band via the third channel and the first antenna. The first phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the second or third frequency band; the second phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the first or third frequency band; and the fourth phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the first or second frequency band. This is equivalent to the first antenna being used by the first, second, and third frequency bands. The first phase shifter improves the performance of the first antenna in the second or third frequency band, the second phase shifter improves the performance of the first antenna in the first or third frequency band, and the fourth phase shifter improves the performance of the first antenna in the second or third frequency band. This allows the first antenna to simultaneously meet the performance requirements of the first, second, and third frequency bands, which is equivalent to further improving the performance of electronic devices operating in multiple frequency bands.

[0127] This application also provides an impedance matching method, which is applied as described above. Figures 4 to 12 In the electronic device shown. The following is through... Figures 13 to 16 Let me explain in detail.

[0128] In one embodiment, such as Figure 13 As shown, this impedance matching method is applied to an electronic device, which includes a first channel, a second channel, and a first antenna. The first channel includes a first circuit and a first phase shifter. The first antenna is connected to both the first channel and the second channel. The first circuit is connected to the first antenna via the first phase shifter. The method includes:

[0129] S101, Transmit signals of the first frequency band through the first channel and the first antenna.

[0130] S102. Transmit the signal of the second frequency band through the second channel and the first antenna, wherein when transmitting the signal of the second frequency band through the second channel and the first antenna, the impedance of the first antenna is adjusted by the first phase shifter.

[0131] In one embodiment, another impedance matching method is provided, such as Figure 14 As shown, this impedance matching method is applied to an electronic device, which includes a first channel, a second channel, and a first antenna. The first channel includes a first circuit and a first phase shifter. The second channel includes a second circuit and a second phase shifter. The first antenna is connected to both the first and second channels. The first circuit is connected to the first antenna via the first phase shifter, and the second circuit is connected to the first antenna via the second phase shifter. The method includes:

[0132] S201. When transmitting a signal of the first frequency band through the first channel and the first antenna, the impedance of the first antenna is adjusted by the second phase shifter.

[0133] S202. When transmitting a signal of the second frequency band through the second channel and the first antenna, the impedance of the first antenna is adjusted by the first phase shifter.

[0134] In one embodiment, another impedance matching method is provided, such as Figure 15 As shown, this impedance matching method is applied to an electronic device, which includes a first channel, a second channel, a third phase shifter, and a first antenna. The first channel includes a first circuit and a first phase shifter. The second channel includes a second circuit and a second phase shifter. The first antenna is connected to the first channel and the second channel respectively through the third phase shifter. Specifically, the first circuit is connected to the first antenna through the first phase shifter, and the second circuit is connected to the first antenna through the second phase shifter. The method includes:

[0135] S301. When transmitting a signal of the first frequency band through the first channel and the first antenna, the impedance of the first antenna is adjusted by the third phase shifter.

[0136] S302. When transmitting signals of the second frequency band through the second channel and the first antenna, the impedance of the first antenna is adjusted by the third phase shifter.

[0137] In one embodiment, another impedance matching method is provided, such as Figure 16 As shown, this impedance matching method is applied to an electronic device, which includes a first channel, a second channel, a third channel, and a first antenna. The first channel includes a first circuit and a first phase shifter. The second channel includes a second circuit and a second phase shifter, and the third channel includes a third circuit and a fourth phase shifter. The first antenna is connected to the first channel, the second channel, and the third channel, respectively. Specifically, the first circuit is connected to the first antenna via the first phase shifter, the second circuit is connected to the first antenna via the second phase shifter, and the third circuit is connected to the first antenna via the fourth phase shifter. The method includes:

[0138] S401. Transmit a signal of the third frequency band through the third channel and the first antenna, wherein, when transmitting the signal of the third frequency band through the third channel and the first antenna, the impedance of the first antenna is adjusted by the first phase shifter and the second phase shifter.

[0139] S402. When transmitting a signal of the first frequency band through the first channel and the first antenna, the impedance of the first antenna is adjusted by the second phase shifter and the fourth phase shifter.

[0140] It should be understood that, in one possible scenario, where the electronic device does not include a second phase shifter, the impedance of the first antenna can be adjusted via a fourth phase shifter.

[0141] S403. When transmitting a signal of the second frequency band through the second channel and the first antenna, the impedance of the first antenna is adjusted by the first phase shifter and the fourth phase shifter.

[0142] It should be understood that, in one possible scenario, where the electronic device does not include the first phase shifter, the impedance of the first antenna can be adjusted via the fourth phase shifter.

[0143] In one embodiment of the impedance matching method, the operating frequency band of the electronic device to which the impedance matching method is applied includes a first frequency band and a second frequency band.

[0144] In one embodiment of the impedance matching method, the electronic device to which the impedance matching method is applied receives a signal of a first frequency band through a first channel and receives a signal of a second frequency band through a second channel.

[0145] The implementation principle and beneficial effects of the impedance matching method described above are similar to those of the electronic device embodiments, and will not be repeated here.

[0146] 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.

[0147] 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.

[0148] 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.

[0149] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean 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 the present application.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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 channel, a second channel, and a first antenna. The first channel includes a first circuit and a first phase shifter. The first circuit includes a first filter. The first antenna is connected to the first channel and the second channel respectively, wherein the first circuit is connected to the first antenna through the first phase shifter; The electronic device transmits signals of the first frequency band through the first channel and the first antenna, and filters out signals other than the first frequency band through the first filter; The electronic device transmits signals in the second frequency band through the second channel and the first antenna; The first phase shifter is used to adjust the impedance of the first antenna when transmitting signals of the second frequency band, so that the performance of the first antenna meets the performance requirements of the second frequency band.

2. The electronic device according to claim 1, characterized in that, The second channel includes a second circuit and a second phase shifter. The second circuit is connected to the first antenna through the second phase shifter. The second phase shifter is used to adjust the impedance of the first antenna when the electronic device transmits a signal of the first frequency band.

3. The electronic device according to claim 1 or 2, characterized in that, The electronic device further includes a third phase shifter, through which the first antenna is connected to the first channel and the second channel respectively. The third phase shifter is used to adjust the impedance of the first antenna in the first frequency band and the second frequency band.

4. The electronic device according to any one of claims 1 to 3, characterized in that, The electronic device further includes a third channel, which includes a third circuit and a fourth phase shifter. The third circuit is connected to the first antenna through the fourth phase shifter. The electronic device transmits a signal of a third frequency band through the third channel and the first antenna. The fourth phase shifter is used to adjust the impedance of the first antenna when the electronic device transmits a signal of the first frequency band and / or when the electronic device transmits a signal of the second frequency band.

5. The electronic device according to any one of claims 1 to 4, characterized in that, The operating frequency bands of the electronic device include the first frequency band and the second frequency band.

6. The electronic device according to any one of claims 1 to 4, characterized in that, The electronic device is configured to receive signals of the first frequency band via the first channel, and to receive signals of the second frequency band via the second channel.

7. An impedance matching method, characterized in that, The method is applied to an electronic device, the electronic device including a first channel, a second channel, and a first antenna. The first channel includes a first circuit and a first phase shifter. The first antenna is connected to both the first channel and the second channel. The first circuit is connected to the first antenna via the first phase shifter. The first circuit includes a first filter. The method includes: Signals in the first frequency band are transmitted through the first channel and the first antenna, and signals other than those in the first frequency band are filtered out by the first filter. Signals in the second frequency band are transmitted through the second channel and the first antenna, wherein... The transmission of the second frequency band signal through the second channel and the first antenna includes: When transmitting signals of the second frequency band through the second channel and the first antenna, the impedance of the first antenna is adjusted by the first phase shifter so that the performance of the first antenna meets the performance requirements of the second frequency band.

8. The method according to claim 7, characterized in that, The second channel includes a second circuit and a second phase shifter. The second circuit is connected to the first antenna via the second phase shifter. The transmission of the first frequency band signal through the first channel and the first antenna includes: When transmitting signals of the first frequency band through the first channel and the first antenna, the impedance of the first antenna is adjusted by the second phase shifter.

9. The method according to claim 7 or 8, characterized in that, The electronic device further includes a third phase shifter, through which the first antenna is connected to the first channel and the second channel respectively. The transmission of the first frequency band signal through the first channel and the first antenna includes: When transmitting a signal of the first frequency band through the first channel and the first antenna, the impedance of the first antenna is adjusted by the third phase shifter; The transmission of the second frequency band signal through the second channel and the first antenna includes: When transmitting signals of the second frequency band through the second channel and the first antenna, the impedance of the first antenna is adjusted by the third phase shifter.

10. The method according to any one of claims 7 to 9, characterized in that, The second channel includes a second circuit and a second phase shifter. The electronic device further includes a third channel, which includes a third circuit and a fourth phase shifter. The second circuit is connected to the first antenna via the second phase shifter, and the third circuit is connected to the first antenna via the fourth phase shifter. The method further includes: Signals in the third frequency band are transmitted through the third channel and the first antenna; wherein... The transmission of the third frequency band signal through the third channel and the first antenna includes: When transmitting the signal of the third frequency band through the third channel and the first antenna, the impedance of the first antenna is adjusted by the first phase shifter and the second phase shifter; The transmission of the first frequency band signal through the first channel and the first antenna includes: When transmitting a signal of the first frequency band through the first channel and the first antenna, the impedance of the first antenna is adjusted by the second phase shifter and the fourth phase shifter; The transmission of the second frequency band signal through the second channel and the first antenna includes: When transmitting signals of the second frequency band through the second channel and the first antenna, the impedance of the first antenna is adjusted by the first phase shifter and the fourth phase shifter.

11. The method according to any one of claims 7 to 10, characterized in that, The operating frequency bands of the electronic device include the first frequency band and the second frequency band.

12. The method according to any one of claims 7 to 10, characterized in that, The method further includes: Receive signals from the first frequency band through the first channel; The signal of the second frequency band is received through the second channel.

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