Coupler-cascaded multipath radio frequency signal selection circuit

Abstract

The invention discloses a coupler cascaded multipath radio frequency signal selection circuit and an electronic device, the coupler cascaded multipath radio frequency signal selection circuit is mainly composed of a transmit-receive module, a first coupler and a radio frequency transmit-receive chip, the first coupler comprises a first isolation port and a first coupling signal port, the former is connected with the radio frequency transmit-receive chip, the latter is connected with a configuration module of the transmit-receive module, and the first isolation port is connected with the radio frequency transmit-receive chip. When the configuration module is in a first state, the transceiver module receives and transmits a first radio frequency signal and sends a generated first coupling signal to a first isolation port of the first coupler, and then the first coupling signal is sent to the radio frequency transceiver chip through a first coupling signal port; and when the configuration module is in the second state, the first coupler receives and transmits the second radio frequency signal and transmits the generated second coupling signal to the radio frequency receiving and transmitting chip, so that a selection circuit does not need to be arranged between the receiving and transmitting module and the radio frequency receiving and transmitting chip, the circuit structure is simplified, and the material cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of radio frequency technology, and in particular to a coupler cascade multi-path radio frequency signal selection circuit and electronic equipment. Background Art

[0002] Coupler is an important component of the mobile phone RF framework. RF signal generates coupling signal through coupler. Mainstream RF transceiver chips such as Qualcomm and MediaTek rely on detecting the coupling signal power output by the coupler to regulate the power of RF signal. With the advancement of the fifth generation mobile communication technology (Fifth Generation, 5G) project, the use of multi-path transmission signals is becoming more and more common. Therefore, RF transceiver chips need to regulate multi-path coupling signals to regulate the power of RF signals.

[0003] In the prior art, different coupling signals are switched by setting a single-pole multi-throw switch between the transceiver module and the RF transceiver chip. When a certain RF signal is working, the corresponding coupling signal enters the RF transceiver chip through the switch switching path. However, this design increases the device cost, the complexity of the ornaments and the occupied area. Summary of the invention

[0004] The embodiment of the present application discloses a multi-channel RF signal selection circuit and electronic device with cascaded couplers, which can realize the path selection of multi-channel RF signals without setting an external selection switch, simplifying the circuit design and reducing the material cost of the design.

[0005] A first aspect of an embodiment of the present application discloses a multi-channel RF signal selection circuit with a coupler cascade, comprising a transceiver module, a first coupler, and a RF transceiver chip, wherein the first coupler comprises a first isolation port and a first coupling signal port, the first coupler is connected to the RF transceiver chip through the first coupling signal port, and is also connected to a configuration module of the transceiver module through the first isolation port, wherein:

[0006] a transceiver module, configured to, when the configuration module is in the first state, transceive a first radio frequency signal, and send a first coupled signal generated by the first radio frequency signal from the configuration module to the first isolation port;

[0007] a first coupler, configured to send the first coupling signal from the first coupling signal port to the RF transceiver chip when the configuration module is in the first state, or to send and receive a second RF signal and send a second coupling signal generated by the second RF signal from the first coupling signal port to the RF transceiver chip when the configuration module is in the second state;

[0008] A radio frequency transceiver chip is used to receive the first coupled signal and the second coupled signal.

[0009] As an optional implementation manner, in the first aspect of this embodiment, the first coupler includes a coupling arm and a through arm, wherein:

[0010] When the configuration module is in the first state, the first coupling signal is input into the first coupler from the first isolation port, and is output from the first coupling signal port through the coupling arm;

[0011] When the configuration module is in the second state, a second radio frequency signal is received and sent through the through arm, and a second coupled signal generated by the second radio frequency signal through the coupling arm is output from the first coupled signal port.

[0012] As an optional implementation manner, in the first aspect of this embodiment, when the configuration module is in the first state, the load impedance of the first isolation port is a first preset value;

[0013] When the configuration module is in the second state, the load impedance of the first isolation port is a second preset value different from the first preset value.

[0014] As an optional implementation, in the first aspect of this embodiment, the configuration module includes a selection switch, the transceiver module also includes a second coupler, the second coupler includes a second coupling signal port, one end of the selection switch is connected to the second coupling signal port, and the other end of the selection switch is connected to the first isolation port;

[0015] When the first RF signal is input into the transceiver module, the first RF signal generates the first coupled signal through the second coupler, the first coupled signal is output from the second coupled signal port, and is sent to the first isolation port through the selection switch;

[0016] When the configuration module is in the first state, the transceiver module controls the second coupling signal port to be connected to the first isolation port, and the selection switch is in an on state, so that the load impedance of the first isolation port is a first preset value;

[0017] When the configuration module is in the second state, the transceiver module controls the second coupling signal port to be disconnected from the first isolation port, and the selection switch is in an isolation state, so that the load impedance of the first isolation port is a second preset value.

[0018] As an optional implementation manner, in the first aspect of this embodiment, the selection switch is a single-pole single-throw switch, the static contact of the single-pole single-throw switch is connected to the second coupling signal port, and the moving contact of the single-pole single-throw switch is connected to the first isolation port;

[0019] When the configuration module is in the first state, the transceiver module controls the movable contact to be connected to the static contact, so that the second coupling signal port is connected to the first isolation port, and the single-pole single-throw switch is in the on state, so that the load impedance of the first isolation port is a first preset value;

[0020] When the configuration module is in the second state, the transceiver module controls the moving contact to be disconnected from the static contact, so that the second coupling signal port is disconnected from the first isolation port, and the single-pole single-throw switch is in an isolated state, so that the load impedance of the first isolation port is a second preset value.

[0021] As an optional implementation, in the first aspect of this embodiment, the transceiver module further includes a third coupler, the third coupler includes the third coupling signal port, one end of the selection switch is respectively connected to the second coupling signal port and the third coupling signal port, and the other end of the selection switch is connected to the first isolation port;

[0022] When a third RF signal is input into the transceiver module, the third RF signal generates a third coupled signal through the third coupler, the third coupled signal is output from the third coupled signal port, and is sent to the first isolation port through the selection switch.

[0023] As an optional implementation, in the first aspect of this embodiment, the selection switch is a single-pole double-throw switch, the two static contacts of the single-pole double-throw switch are respectively connected to the second coupling signal port and the third coupling signal port, and the moving contact of the single-pole single-throw switch is connected to the first isolation port;

[0024] When the first radio frequency signal is input into the transceiver module, the transceiver module controls the movable contact to be connected to the static contact connected to the second coupling signal port, so that the second coupling signal port is connected to the first isolation port, the single-pole double-throw switch is in an on state, and the load impedance of the first isolation port is a first preset value;

[0025] When the third RF signal is input into the transceiver module, the transceiver module controls the moving contact to be connected to the static contact connected to the third coupling signal port, so that the third coupling signal port is connected to the first isolation port, the single-pole double-throw switch is in an on state, and the load impedance of the first isolation port is a first preset value.

[0026] As an optional implementation, in the first aspect of this embodiment, when the second RF signal is input into the first coupler, the transceiver module controls the moving contact to be disconnected from the two static contacts, so that the first coupling signal port, the second coupling signal port and the first isolation port are in a disconnected state, the single-pole double-throw switch is in an isolated state, and the load impedance of the first isolation port is a second preset value.

[0027] As an optional implementation manner, in the first aspect of this embodiment, the first preset value is smaller than the second preset value.

[0028] A second aspect of an embodiment of the present application discloses an electronic device, comprising any one of the multi-channel radio frequency signal selection circuits disclosed in the present application.

[0029] Compared with the related art, the embodiments of the present application include at least the following beneficial effects:

[0030] An embodiment of the present application discloses a multi-channel RF signal selection circuit with a coupler cascade, which is mainly composed of a transceiver module, a first coupler and a RF transceiver chip. The first coupler includes a first isolation port and a first coupling signal port. The former is connected to the RF transceiver chip, and the latter is connected to the configuration module of the transceiver module. When the configuration module is in a first state, the transceiver module transmits and receives the first RF signal and sends the generated first coupling signal to the first isolation port of the first coupler, and then sends it to the RF transceiver chip through the first coupling signal port; when the configuration module is in a second state, the first coupler transmits and receives the second RF signal and sends the generated second coupling signal to the RF transceiver chip. This design does not require a selection circuit to be set between the transceiver module and the RF transceiver chip, simplifies the circuit structure, and reduces material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic circuit structure diagram of a first radio frequency signal selection circuit provided in an embodiment of the present application;

[0033] Figure 2 A schematic circuit structure diagram of a second RF signal selection circuit provided in an embodiment of the present application;

[0034] Figure 3 A schematic circuit structure diagram of a third RF signal selection circuit provided in an embodiment of the present application;

[0035] Figure 4 A schematic circuit structure diagram of a fourth RF signal selection circuit provided in an embodiment of the present application;

[0036] Figure 5 A schematic circuit structure diagram of a fifth RF signal selection circuit provided in an embodiment of the present application;

[0037] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] It should be pointed out that the terms "first\second\third" involved in the embodiments of the present application are used to distinguish similar or different objects, and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0040] It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present application and the accompanying drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0041] The coupler is an important component of the mobile phone's RF framework. The RF signal generates a coupling signal through the coupler. Mainstream RF transceiver chips such as Qualcomm and MediaTek rely on detecting the coupling signal power output by the coupler to regulate the power of the RF signal. With the advancement of 5G projects, the use of multi-path transmission signals is becoming more and more common. Therefore, the RF transceiver chip needs to regulate the multi-path coupling signal to regulate the power of the RF signal.

[0042] In the prior art, the conventional RF framework switches between two coupled signals by setting a single-pole multi-throw switch between the transceiver module and the RF transceiver chip. The working principle of this design is that when the RF signal 1 is in working state, the coupler inside the transceiver module is responsible for processing the signal to generate coupled signal 1, and switches to the path of coupled signal 1 by controlling the external single-pole multi-throw switch, and sends the generated coupled signal 1 to the RF transceiver chip, and when the RF signal 2 is working, an external coupler is used to generate a coupled signal, and switches to the path of coupled signal 2 by controlling the external single-pole multi-throw switch, and sends the generated coupled signal 2 to the RF transceiver chip. Although this configuration realizes the management of multiple signals, the use of additional switch components to switch the path of the RF signal alone will increase the overall cost of the device, and as the number of devices increases, the complexity of the design will also increase accordingly. On the other hand, the area of ​​the designed ornaments may also increase as a result, which is particularly important in the design of mobile phones with limited volume. Therefore, although the coupler is indispensable in RF design, the cost, complexity and space occupation problems it brings also require designers to carefully weigh during the development process.

[0043] The embodiments of the present application disclose a multi-channel RF signal selection circuit and electronic device with cascaded couplers. By cascading an external coupler with a coupler of a transceiver module, path selection of multi-channel RF signals can be achieved without setting a selection switch between the RF transceiver chip and the transceiver module, thereby simplifying the circuit design and reducing the material cost of the design. The detailed descriptions are given below.

[0044] The multi-channel RF signal selection circuit of the coupler cascade disclosed in the embodiment of the present application can be applied to a variety of fields, including but not limited to the 5G communication field, satellite communication field, Internet of Things field, wireless sensor network field, smart furniture system and medical equipment field, etc. Among them, in the 5G communication field, the multi-channel RF signal selection circuit can be applied to including but not limited to 5G base stations, terminal equipment, antenna arrays and multiple-input multiple-output systems, etc.; in satellite communication systems, signal stability and transmission quality are crucial. The multi-channel RF signal selection circuit can be used to switch different signal channels between ground stations and satellites to cope with different communication requirements and conditions. In addition, in multi-beam satellite systems, the multi-channel RF signal selection circuit can also help realize signal switching and combination between different beams to ensure the stability of information transmission; in the field of Internet of Things, the multi-channel RF signal selection circuit can help Internet of Things devices in wireless security (Wireless Fidelity, WiFi), Bluetooth, Zigbee and other communication protocols to achieve real-time data transmission and effective communication between devices; in wireless sensor networks, the multi-channel RF signal selection circuit can select between different sensor signals to ensure the effectiveness and accuracy of data transmission; in smart home systems, the multi-channel RF signal selection circuit can be applied to devices with multiple functions including but not limited to audio, video, security, temperature control, etc., and can effectively switch signals between these devices to ensure that users can get the best experience in different scenarios. In addition, the multi-channel RF signal selection circuit can also be used for efficient communication between different sensors and controllers in home automation systems; in the field of medical equipment, the multi-channel RF signal selection system can be applied to including but not limited to wireless medical monitoring and transmission systems to switch between different monitoring signals to ensure that patient data can be transmitted to medical service providers in real time and accurately.

[0045] See also Figure 1 , Figure 1 A schematic circuit structure diagram of a first RF signal selection circuit provided in an embodiment of the present application includes a transceiver module 11, a configuration module 111, a first coupler 12, and a RF transceiver chip 13, wherein the first coupler 12 includes a first isolation port 121, a first coupling signal port 122, a first signal input port 123, and a first signal output port 124, and the first coupler 12 is connected to the RF transceiver chip 13 through the first coupling signal port 122, and is also connected to the configuration module 111 of the transceiver module 11 through the first isolation port 121, wherein:

[0046] The transceiver module 11 is used for transmitting and receiving a first radio frequency signal when the configuration module 111 is in a first state, and sending a first coupled signal generated by the first radio frequency signal from the configuration module 111 to the first isolation port 121;

[0047] The first coupler 12 is used to send the first coupling signal from the coupling signal port 122 to the RF transceiver chip 13 when the configuration module 111 is in the first state, or to send and receive the second RF signal when the configuration module 111 is in the second state, that is, the second RF signal is output from the first signal input port 123 and output from the first signal output port 124, and the second coupling signal generated by the second RF signal is sent from the coupling signal port 122 to the RF transceiver chip 13;

[0048] The radio frequency transceiver chip 13 is used to receive the first coupled signal and the second coupled signal.

[0049] The transceiver module 11 is used to receive a first RF signal, send a first RF signal, and send a first coupled signal generated by the first RF signal through the transceiver module from the configuration module of the transceiver module to the first isolation port of the first coupler when its configuration module is in the first state.

[0050] The transceiver module is a hardware component designed for wireless communication, which can handle the sending and receiving functions of the signal at the same time. Compared with a separate RF transceiver chip, the module usually contains more functions and circuits, which is convenient for rapid integration into various devices. The transceiver module can be composed of a RF transceiver chip, an antenna, a filter, a power amplifier, a low noise amplifier, a power management circuit, and an interface circuit, but is not limited to this. Among them, the RF transceiver chip is the core component of the transceiver module, which is responsible for signal modulation, demodulation and amplification; the antenna is used to transmit and receive wireless signals, usually built-in or external; the filter is used to filter out unnecessary frequency components and improve signal quality; the power amplifier is used to enhance the transmission power of the signal; the low noise amplifier is used to reduce signal noise and improve sensitivity during the reception process; the power management circuit provides a stable power supply for the module and manages power consumption; the interface circuit is used to communicate with the main controller. Commonly used interface communication protocols include but are not limited to high-speed synchronous serial communication protocol SPI (Serial Peripheral Interface, SPI), asynchronous serial communication protocol UART (Universal Asynchronous Receiver-Transmitter, UART), synchronous serial communication protocol I2C (Inter-Integrated Circuit, I2C), etc.

[0051] Optionally, there are many kinds of transceiver modules, which can be selected according to actual needs, for example, WIFI module, Bluetooth module, Zigbee module, LoRa module, near field communication module (Near Field Communicatio Module, NFC), GPS module (Global Positioning System Module), cellular module, etc., which are not specifically limited here. Among them, the WIFI module mainly communicates with the wireless router through radio waves and uses the 802.11 protocol to realize data transmission. It converts digital signals into radio frequency signals for transmission and demodulates the received radio frequency signals into digital signals; the Bluetooth module uses short-range radio technology and performs device pairing and data exchange through the Bluetooth protocol. The operating frequency band is usually 2.4GHz, and frequency hopping technology is used to reduce interference; the Zigbee module is based on the IEEE 802.15.4 standard and is designed for low-power, low-rate applications. It is suitable for wireless personal area networks and communicates through star or mesh network topologies; the LoRa module uses spread spectrum modulation technology to achieve long-distance communication with low power consumption. The LoRa network usually adopts a star architecture, and the terminal device sends data to the cloud through the base station; the NFC module supports communication within a few centimeters through near-field magnetic induction technology. NFC can realize functions such as data exchange, payment and identity authentication; the GPS module receives signals from satellites and calculates the location of the device through triangulation; the cellular module communicates with the mobile communication base station through the cellular network, and uses GSM, LTE and other protocols for data and voice transmission.

[0052] When the configuration module is in the first state, since the first isolation port of the first coupler is connected to the configuration module, the isolation port of the first coupler can receive the first coupling signal generated by the transceiver module, and the first coupler sends the first coupling signal from the first coupling signal port to the RF transceiver chip. At this time, the first coupler is equivalent to a through device. When the configuration module is in the second state, the second RF signal is input through the first input port of the first coupler, output from the first output port, and generates a second coupling signal that is sent from the coupling signal port to the RF transceiver chip. At this time, the first isolation port of the first coupler keeps the second RF signal in a good isolation state from other signals.

[0053] The first coupler 12, the embodiment of the present application mainly uses a four-port coupler, which generally includes a signal input port, a signal transmission port, an isolation port and a coupling signal port, and is mainly used for signal transmission and isolation. It can achieve efficient coupling between different signal paths while maintaining good isolation. Its working principle is based on electromagnetic coupling and distribution network, mainly including but not limited to coupling mechanism, distribution and merging of bidirectional signal transmission signals, reciprocity and other aspects, wherein the coupling mechanism refers to that the coupler is usually composed of a transmission line, a transformer or other electromagnetic components. After the signal enters the coupler through the input port, part of the signal is coupled to other ports; bidirectional signal transmission refers to that each port can be used as both an input port and an output port, so that the coupler can realize bidirectional signal transmission between multiple signal paths; distribution and merging refers to that the coupler can distribute the input signal to multiple output ports, or merge multiple input signals into one output port, so that the routing and processing of the signal are more flexible; reciprocity refers to the symmetry of signal transmission between different ports, that is, after the signal is input from one port, the transmission mode and effect in the coupler are symmetrical, and the reverse propagation is the same.

[0054] There are many different types of four-port couplers, which can be selected according to actual needs, such as directional couplers, non-directional couplers, resonant couplers, planar couplers, fiber couplers, waveguide couplers, hybrid couplers, digital signal couplers, etc., but not limited to these. Directional couplers allow signals to flow in a specific direction and provide high isolation in the opposite direction. They are often used in systems that need to control the direction of signal flow, such as wireless communications and signal distribution; non-directional couplers can transmit signals in any direction and are suitable for multi-channel signal transmission and reception systems, such as in radio and television broadcasting; resonant couplers use resonant cavity structures to provide good frequency selectivity and are often used in RF and microwave bands, suitable for high-frequency signal processing; planar couplers use Designed with planar circuits, usually using microwave integrated circuit technology, it can be applied to modern microwave and radio frequency circuits, especially compact and highly integrated systems; fiber couplers are used to distribute optical signals from one optical fiber to multiple optical fibers, or to merge signals from multiple optical fibers into one optical fiber, and can be used in optical communications, optical sensors, and optical signal processing systems, etc.; waveguide couplers use waveguide structures and are suitable for the transmission of high-power and high-frequency signals, and can be used in microwaves and millimeter waves; hybrid couplers combine the characteristics of multiple couplers and can realize multiple signal processing functions, and are suitable for systems that require complex signal routing and processing; digital signal couplers are specifically used for the transmission and processing of digital signals, have good anti-interference capabilities, and are suitable for digital communication systems, such as optical fiber communications and network systems.

[0055] The RF transceiver chip 13 is mainly used to receive multi-channel coupled signals and adjust the power of the signals according to the coupled signals.

[0056] The RF transceiver chip consists of several parts including but not limited to RF front end, modem, baseband processing unit, clock and frequency synthesizer and interface circuit; the RF front end is responsible for signal amplification, modulation and demodulation; the modem is used to convert digital signals into analog signals (modulation) and convert analog signals into digital signals (demodulation); the baseband processing unit performs signal processing and protocol stack implementation, and supports data encoding and decoding; the clock and frequency synthesizer is used to generate stable clock signals and RF signal frequencies to ensure communication stability; the interface circuit provides a communication interface with the main controller, and commonly used interface communication protocols include but are not limited to SPI, I2C, UART, etc.

[0057] There are many kinds of RF transceiver chips, which can be selected according to actual needs, such as low-power Bluetooth transceiver chips, LoRa transceiver chips, Wi-Fi transceiver chips, etc., but not limited to these. Low-power Bluetooth transceiver chips are used for wearable devices and Internet of Things applications; LoRa transceiver chips are used for long-distance, low-power data transmission; Wi-Fi transceiver chips are used for wireless network connections.

[0058] In some embodiments, the first coupler includes a coupling arm and a through arm. When the configuration module is in the first state, the first coupling signal is input into the first coupler from the first isolation port and output from the first coupling signal port through the coupling arm. At this time, the first coupler is equivalent to a through device, and the first coupling signal does not change in the process from the first isolation port to the first coupling signal port. When the configuration module is in the second state, the second RF signal is received and sent through the through arm, and the second RF signal outputs a second coupled signal from the first coupling signal port through the coupling arm, that is, when the configuration module is in the second state, the second RF signal is output through the through arm, and the coupling arm couples a part of the signal power on the through arm to the coupling arm, and the generated second coupled signal is output through the first coupling signal port.

[0059] See also Figure 2 , Figure 2A schematic circuit structure diagram of a second RF signal selection circuit provided in an embodiment of the present application includes a transceiver module 21, a configuration module 211, a first coupler 22 and a RF transceiver chip 23, wherein the first coupler 22 includes a first isolation port 221, a first coupling signal port 222, a first signal input port 223, a first signal output port 224, a coupling arm 225 and a through arm 226, the coupling arm 225 is between the first isolation port 221 and the first coupling signal port 222, and the through arm 226 is between the first signal input port 223 and the first signal output port 224, the first coupler 22 is connected to the RF transceiver chip 23 through the first coupling signal port 221, and is also connected to the configuration module 211 of the transceiver module 21 through the first isolation port 221, wherein one end of the coupling arm 225 is connected to the first isolation port 221, and the other end is connected to the first coupling signal port 222; one end of the through arm 226 is connected to the first signal input port 223, and the other end is connected to the coupling signal path.

[0060] Exemplarily, when a first RF signal is input to the transceiver module 21, the configuration module 211 is in a first state, the transceiver module 21 receives and transmits the first RF signal, and generates a first coupling signal, which is sent to the first isolation port 212 of the first coupler 22 through the configuration module 211. The first coupling signal is input to the first coupler 22 from the first isolation port 212, and is sent from the first coupling signal port 222 to the RF transceiver chip 23 through the coupling arm 225. At this time, the first coupler is equivalent to a through device.

[0061] When the second RF signal is input to the first coupler 22, the configuration module 211 is in the second state, the isolation port 221 isolates other signal interference, the second RF signal is input from the first signal input port 123 of the first coupler 22, and is output from the first signal output port 124 through the straight-through arm 226. At this time, the signal output from the first signal output port 124 does not change much, and the coupling arm 225 couples part of the signal power on the straight-through arm 226 to the second coupled signal generated on the coupling arm, and sends the generated second coupled signal from the coupling signal port 222 of the first coupler 22 to the RF transceiver chip 23.

[0062] In some embodiments, when the configuration module is in the first state, the load impedance of the first isolation port is a first preset value; when the configuration module is in the second state, the load impedance of the first isolation port is a second preset value different from the first preset value.

[0063] Please read further Figure 2The configuration module 211 is connected to the isolation signal port 221 of the first coupler 22. The state of the configuration module 211 determines the load impedance of the first isolation port 221. The configuration module 211 is in different states, and the load impedance of the first isolation port 221 is also different. When the configuration module 211 is in the first state, the load impedance of the first isolation port 221 is a first preset value. At this time, the first coupling signal generated by the first RF signal through the transceiver module 21 can be sent to the first isolation port 221 through the configuration module 211, and sent to the RF transceiver chip 23 through the coupling signal port 222 of the first coupler 22.

[0064] When the configuration module 211 is in the second state, the load impedance of the first isolation port 221 is a second preset value, and the first preset value is different from the second preset value. At this time, the first coupling signal cannot be sent to the first isolation port 221 through the configuration module 211, thereby avoiding interference of the first coupling signal with the second RF signal. The second RF signal generates a second coupling signal through the coupling arm 226 of the first coupler 22, and is sent from the coupling signal port 222 of the first coupler 22 to the RF transceiver chip 23.

[0065] In some embodiments, the configuration module includes a selection switch, the transceiver module also includes a second coupler, the second coupler includes a second coupling signal port, one end of the selection switch is connected to the second coupling signal port, and the other end of the selection switch is connected to the first isolation port, see Figure 3 , Figure 3 The schematic circuit structure diagram of the third RF signal selection circuit provided in the embodiment of the present application includes a transceiver module 31, a second coupler 34, a second coupling signal port 341, a configuration module 35, a selection switch 351, a first coupler 32 and a RF transceiver chip 33, wherein the first coupler 32 includes a first isolation port 321, a first coupling signal port 322, a first signal input port 323 and a first signal output port 324.

[0066] The first coupler 32 is connected to the RF transceiver chip 33 via the first coupling signal port 322 , and is also connected to one end of the selection switch 351 via the first isolation port 321 . The other end of the selection switch 351 is connected to the second coupling signal port 341 .

[0067] When the first RF signal is input into the transceiver module 31, the first RF signal generates a first coupled signal through the second coupler 34, the first coupled signal is output from the second coupled signal port 341, and is sent to the first isolation port 321 through the selection switch 351, and is sent to the RF transceiver chip 33 through the coupled signal port 322 of the first coupler 32.

[0068] When the configuration module 35 is in the first state, the transceiver module 31 controls the second coupling signal port 341 to be connected to the first isolation port 321, and the selection switch 351 is in the on state, so that the load impedance of the first isolation port 321 is the first preset value. At this time, the first coupling signal can be sent to the first isolation port 321 through the configuration module 35.

[0069] When the configuration module 35 is in the second state, the transceiver module 31 controls the second coupling signal port 341 to be disconnected from the first isolation port 321, and the selection switch 351 is in the isolation state, so that the load impedance of the first isolation port 321 is a second preset value. At this time, the first coupling signal cannot be sent to the first isolation port 321 through the configuration module 35, and the second RF signal is in a working state.

[0070] In some embodiments, the selector switch is a single-pole single-throw switch, see Figure 4 , Figure 4 The schematic circuit structure diagram of the fourth RF signal selection circuit provided in an embodiment of the present application includes a transceiver module 41, a second coupler 44, a second coupling signal port 441, a configuration module 45, a single-pole single-throw switch 451, a first coupler 42 and a RF transceiver chip 43, wherein the first coupler 42 includes a first isolation port 421, a first coupling signal port 422, a first signal input port 423 and a first signal output port 424.

[0071] The first coupler 42 is connected to the RF transceiver chip 43 via the first coupling signal port 422 , and is also connected to the moving contact of the single-pole single-throw switch 451 via the first isolation port 421 . The static contact of the single-pole single-throw switch 451 is connected to the second coupling signal port 441 .

[0072] Among them, the single-pole single-throw switch is a type of single-pole multi-throw switch, that is, a single output terminal and a single input terminal. Optionally, the selection switch of the embodiment of the present application includes but is not limited to a single-pole single-throw switch, and other single-pole multi-throw switches can also be selected according to the situation to achieve more RF signal path selection. Generally, a single-pole multi-throw switch (SPxT, Single Polex Throw Switch) is a common electrical switch used to select between an input port and multiple output ports. The single-pole multi-throw switch in this application refers to a switch that can select between an input port and multiple output ports, and also refers to a switch that can select between an output port and multiple input ports. Its basic structure includes a single input terminal and multiple output terminals, or multiple input terminals and a single output terminal. A single pole is a single input terminal or output terminal, which is also called a moving contact in this application; a multi-throw is a plurality of output terminals or a plurality of input terminals, and each output terminal or each input terminal is called a "throw", which is also called a static contact in this application, that is, a switching option. For example: SPDT (Single Pole Double Throw) has one input and two outputs or one output and two inputs, also known as a single-pole double-throw switch, SP3T (Single Pole Triple Throw) has one input and three outputs or one output and three inputs, also known as a single-pole triple-throw switch, and so on. The mechanical or electronic structure inside the single-pole multi-throw switch connects the input or output to the selected output or input, while disconnecting the connection with other outputs or inputs.

[0073] Exemplarily, when the configuration module 45 is in the first state, the transceiver module 41 controls the moving contact to be connected to the static contact, and the single-pole single-throw switch 451 is in the on state, so that the second coupling signal port 441 is connected to the first isolation port 421, and the load impedance of the first isolation port 421 is a first preset value. At this time, the first coupling signal generated by the first RF signal through the transceiver module 41 can be sent to the first isolation port 421 through the configuration module 45, and sent to the RF transceiver chip 43 through the coupling signal port 422 of the first coupler 42.

[0074] When the configuration module 45 is in the second state, the transceiver module 41 controls the moving contact and the static contact to be disconnected. At this time, the single-pole single-throw switch 451 is in an isolated state, so that the second coupling signal port 441 is disconnected from the first isolation port 421, and the load impedance of the first isolation port is a second preset value. At this time, the first coupling signal cannot be sent to the first isolation port 421 through the configuration module 45, avoiding the interference of the first coupling signal on the second RF signal. The second RF signal generates a second coupling signal and is sent from the coupling signal port 422 of the first coupler 42 to the RF transceiver chip 43.

[0075] In some embodiments, the transceiver module further includes a third coupler, the third coupler includes the third coupling signal port, one end of the selection switch is respectively connected to the second coupling signal port and the third coupling signal port, and the other end of the selection switch is connected to the first isolation port;

[0076] When a third RF signal is input into the transceiver module, the third RF signal generates a third coupled signal through the third coupler, the third coupled signal is output from the third coupled signal port, and is sent to the first isolation port through the selection switch.

[0077] In some embodiments, the selector switch is a single-pole double-throw switch. Figure 5 , Figure 5 The schematic circuit structure diagram of the fifth RF signal selection circuit provided in the embodiment of the present application includes a transceiver module 51, a second coupler 54, a second coupling signal port 541, a third coupler 55, a third coupling signal port 551, a configuration module 56, a single-pole double-throw switch 561, a first coupler 52 and a RF transceiver chip 53, wherein the first coupler 52 includes a first isolation port 521, a first coupling signal port 522, a first signal input port 523, a first signal output port 524, a coupling arm 525 and a through arm 526.

[0078] The first coupler 52 is connected to the RF transceiver chip 43 through the first coupling signal port 521, and is also connected to the moving contact of the single-pole double-throw switch 551 through the first isolation port 521. The two static contacts of the single-pole double-throw switch 551 are respectively connected to the second coupling signal port 541 and the third coupling signal port 551.

[0079] Exemplarily, when the first RF signal is input into the transceiver module 51, the transceiver module 51 controls the moving contact to be connected to the static contact connected to the second coupling signal port 541, so that the single-pole double-throw switch 561 is in the on state, so that the second coupling signal port 541 is connected to the first isolation port 521, and the load impedance of the first isolation port 521 is a first preset value. At this time, the first coupling signal generated by the first RF signal through the transceiver module 51 can be sent to the first isolation port 521 through the configuration module 56, and sent from the coupling signal port 522 to the RF transceiver chip 53 through the coupling arm 525 of the first coupler 52. At this time, the first coupler 52 is equivalent to a through device.

[0080] When the third RF signal is input to the transceiver module 51, the transceiver module 51 controls the moving contact to be connected to the static contact connected to the third coupling signal port 551, so that the third coupling signal port 551 is connected to the first isolation port, the single-pole double-throw switch 561 is in the on state, and the load impedance of the first isolation port 521 is the first preset value. At this time, the third coupling signal generated by the third RF signal through the transceiver module 51 can be sent to the first isolation port 521 through the configuration module 56, and sent from the coupling signal port 522 to the RF transceiver chip 53 through the coupling arm 525 of the first coupler 52. At this time, the first coupler 52 is equivalent to a through device.

[0081] For example, please refer to Figure 5 When the second RF signal is input to the first coupler 52, the transceiver module 51 controls the moving contact to be disconnected from the two static contacts, so that the first coupling signal port 541, the second coupling signal port 551 and the first isolation port 521 are in a disconnected state, the single-pole double-throw switch 561 is in an isolated state, and the load impedance of the first isolation port 521 is a second preset value. At this time, the first coupling signal and the third coupling signal cannot be sent to the first isolation port 521 through the configuration module 56, thereby avoiding the interference of the first coupling signal and the third coupling signal on the second RF signal. The second RF signal generates a second coupling signal through the coupling arm 525 of the first coupler 42, and is sent to the RF transceiver chip 53 from the coupling signal port 522 of the first coupler 52.

[0082] In some embodiments, the first preset value is less than the second preset value.

[0083] Optionally, the first preset value may be 0 ohm, and the second preset value may be 50 ohm, but is not limited thereto.

[0084] See also Figure 6 , Figure 6 60 is a schematic diagram of the structure of the electronic device disclosed in the embodiment of the present application. Figure 6 As shown, the electronic device may include any one of the multi-channel radio frequency signal selection circuits 61 disclosed in the embodiments of the present application.

[0085] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required by the present application.

[0086] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily 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.

[0087] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0088] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0089] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, object A and / or object B can represent three situations: object A exists alone, object A and object B exist at the same time, and object B exists alone.

[0090] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0091] The methods disclosed in several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0092] The features disclosed in several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0093] The features disclosed in several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0094] The above is a detailed introduction to the cascaded coupler multi-channel RF signal selection circuit and electronic device disclosed in the embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those of ordinary skill in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A multi-channel radio frequency signal selection circuit with cascaded couplers, characterized in that: The invention comprises a transceiver module, a first coupler and a radio frequency transceiver chip, wherein the first coupler comprises a first isolation port and a first coupling signal port, the first coupler is connected to the radio frequency transceiver chip through the first coupling signal port, and is also connected to the configuration module of the transceiver module through the first isolation port, wherein: a transceiver module, configured to, when the configuration module is in the first state, transceive a first radio frequency signal, and send a first coupled signal generated by the first radio frequency signal from the configuration module to the first isolation port; a first coupler, configured to send the first coupling signal from the first coupling signal port to the RF transceiver chip when the configuration module is in the first state, or to send and receive a second RF signal and send a second coupling signal generated by the second RF signal from the first coupling signal port to the RF transceiver chip when the configuration module is in the second state; A radio frequency transceiver chip is used to receive the first coupled signal and the second coupled signal.

2. The multi-channel RF signal selection circuit of coupler cascade connection according to claim 1, characterized in that: The first coupler comprises a coupling arm and a through arm, wherein: When the configuration module is in the first state, the first coupling signal is input into the first coupler from the first isolation port, and is output from the first coupling signal port through the coupling arm; When the configuration module is in the second state, a second radio frequency signal is received and sent through the through arm, and a second coupled signal generated by the second radio frequency signal through the coupling arm is output from the first coupled signal port.

3. The multi-channel RF signal selection circuit of coupler cascade connection according to claim 1, characterized in that: When the configuration module is in the first state, the load impedance of the first isolation port is a first preset value; When the configuration module is in the second state, the load impedance of the first isolation port is a second preset value different from the first preset value.

4. The multi-channel RF signal selection circuit of coupler cascade connection according to claim 3, characterized in that: The configuration module includes a selection switch, the transceiver module also includes a second coupler, the second coupler includes a second coupling signal port, one end of the selection switch is connected to the second coupling signal port, and the other end of the selection switch is connected to the first isolation port; When the first RF signal is input into the transceiver module, the first RF signal generates the first coupled signal through the second coupler, the first coupled signal is output from the second coupled signal port, and is sent to the first isolation port through the selection switch; When the configuration module is in the first state, the transceiver module controls the second coupling signal port to be connected to the first isolation port, and the selection switch is in an on state, so that the load impedance of the first isolation port is a first preset value; When the configuration module is in the second state, the transceiver module controls the second coupling signal port to be disconnected from the first isolation port, and the selection switch is in an isolation state, so that the load impedance of the first isolation port is a second preset value.

5. The multi-channel RF signal selection circuit of coupler cascade connection according to claim 4, characterized in that: The selection switch is a single-pole single-throw switch, the static contact of the single-pole single-throw switch is connected to the second coupling signal port, and the moving contact of the single-pole single-throw switch is connected to the first isolation port; When the configuration module is in the first state, the transceiver module controls the movable contact to be connected to the static contact, so that the second coupling signal port is connected to the first isolation port, and the single-pole single-throw switch is in the on state, so that the load impedance of the first isolation port is a first preset value; When the configuration module is in the second state, the transceiver module controls the moving contact to be disconnected from the static contact, so that the second coupling signal port is disconnected from the first isolation port, and the single-pole single-throw switch is in an isolated state, so that the load impedance of the first isolation port is a second preset value.

6. The multi-channel RF signal selection circuit of coupler cascade connection according to claim 4, characterized in that: The transceiver module further includes a third coupler, the third coupler includes the third coupling signal port, one end of the selection switch is respectively connected to the second coupling signal port and the third coupling signal port, and the other end of the selection switch is connected to the first isolation port; When a third RF signal is input into the transceiver module, the third RF signal generates a third coupled signal through the third coupler, the third coupled signal is output from the third coupled signal port, and is sent to the first isolation port through the selection switch.

7. The multi-channel RF signal selection circuit of coupler cascade connection according to claim 6, characterized in that: The selection switch is a single-pole double-throw switch, the two static contacts of the single-pole double-throw switch are respectively connected to the second coupling signal port and the third coupling signal port, and the moving contact of the single-pole double-throw switch is connected to the first isolation port; When the first radio frequency signal is input into the transceiver module, the transceiver module controls the movable contact to be connected to the static contact connected to the second coupling signal port, so that the second coupling signal port is connected to the first isolation port, the single-pole double-throw switch is in an on state, and the load impedance of the first isolation port is a first preset value; When the third RF signal is input into the transceiver module, the transceiver module controls the moving contact to be connected to the static contact connected to the third coupling signal port, so that the third coupling signal port is connected to the first isolation port, the single-pole double-throw switch is in an on state, and the load impedance of the first isolation port is a first preset value.

8. The multi-channel RF signal selection circuit of coupler cascade connection according to claim 7, characterized in that: When the second RF signal is input into the first coupler, the transceiver module controls the moving contact to be disconnected from the two static contacts, so that the first coupling signal port, the second coupling signal port and the first isolation port are in a disconnected state, the single-pole double-throw switch is in an isolated state, and the load impedance of the first isolation port is a second preset value.

9. The multi-channel RF signal selection circuit of coupler cascade connection according to claim 8, characterized in that: The first preset value is smaller than the second preset value.

10. An electronic device, characterized in that: A multi-channel radio frequency signal selection circuit comprising a cascade of couplers as described in any one of claims 1-9.

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