WO2024067028A1

WO2024067028A1 - Radio frequency module, radio frequency system, and electronic device

Info

Publication number: WO2024067028A1
Application number: PCT/CN2023/117807
Authority: WO
Inventors: 张子炎
Original assignee: 荣耀终端有限公司
Priority date: 2022-09-28
Filing date: 2023-09-08
Publication date: 2024-04-04
Also published as: CN218829922U

Abstract

Embodiments of the present application relate to the field of antennas, and provide a radio frequency module, a radio frequency system, and an electronic device, which can reduce the insertion loss in a radio frequency path, thereby improving the performance of the radio frequency module. The radio frequency module comprises a plurality of switches, a plurality of signal processing units, and a common port. Each switch comprises a signal output port and a plurality of signal input ports. The signal output port is connected to the common port. The common port is connected to an antenna. Different signal processing units are connected to different signal input ports. Each switch is used for connecting or disconnecting the signal output port and any signal input port. A first switch of the plurality of switches receives a radio frequency signal in a first frequency band by means of a first signal processing unit. A second switch receives a radio frequency signal in a second frequency band by means of a second signal processing unit. A passband of the first signal processing unit and a stopband of the second signal processing unit cover the first frequency band. A stopband of the first signal processing unit and a passband of the second signal processing unit cover the second frequency band.

Description

A radio frequency module, a radio frequency system and an electronic device

This application claims the priority of the Chinese patent application filed with the State Intellectual Property Office on September 28, 2022, with application number 202222602802.2 and invention name “A radio frequency module, radio frequency system and electronic device”, all contents of which are incorporated by reference in this application.

Technical Field

The embodiments of the present application relate to the field of antennas, and in particular to a radio frequency module, a radio frequency system and an electronic device.

Background technique

With the widespread application of the fifth generation mobile communication (5G) technology, more and more electronic devices have the demand for multi-frequency and multi-mode. Multi-frequency refers to multiple frequency bands, and multi-mode refers to multiple network modes.

Since the number of antennas in electronic devices is relatively limited, in order to meet the multi-frequency and multi-mode requirements of electronic devices, a combiner can be added to the RF path so that RF signals of different frequencies share the same antenna.

However, the combiner is a passive device and will introduce a large insertion loss in the RF path. Even when the RF module does not need to combine RF signals of different frequency bands, the insertion loss overhead caused by the combiner still exists, which has a great impact on the RF performance of the RF module.

Utility Model Content

The embodiments of the present application provide a radio frequency module, a radio frequency system and an electronic device, which can reduce the insertion loss in the radio frequency path and improve the performance of the radio frequency module.

In order to achieve the above-mentioned purpose, the embodiment of the present application adopts the following technical solution.

In a first aspect, a radio frequency module is provided, which is used to transmit or receive radio frequency signals through an antenna. The radio frequency module includes: a plurality of switches, a plurality of signal processing units and a common port. The switch includes a signal output port and a plurality of signal input ports. The signal output port is connected to the common port. The common port is connected to the antenna. Different signal processing units are connected to different signal input ports. The switch is used to connect or disconnect the signal output port and any signal input port. The signal processing unit has a passband and a stopband, and the signal processing unit allows the radio frequency signal of the frequency band covered by the passband to pass through, and prevents the radio frequency signal of the frequency band covered by the stopband from passing through. The plurality of switches include a first switch and a second switch. The first switch receives the radio frequency signal of the first frequency band through the first signal processing unit. The second switch receives the radio frequency signal of the second frequency band through the second signal processing unit. The passband of the first signal processing unit and the stopband of the second signal processing unit cover the first frequency band. The stopband of the first signal processing unit and the passband of the second signal processing unit cover the second frequency band. The first switch and the second switch are any two switches among the plurality of switches. The first signal processing unit is any signal processing unit connected to the first switch, and the second signal processing unit is any signal processing unit connected to the second switch. The first frequency band and the second frequency band are two different arbitrary frequency bands.

Based on this solution, when the first switch is connected and the second switch is disconnected, the RF signal passes through the signal processing unit in sequence and is transmitted to the common port by the first switch; when the second switch is connected and the first switch is disconnected, the RF signal passes through the signal processing unit in sequence and is transmitted to the common port by the second switch. Since the RF module does not include components with large insertion loss such as combiners, it can reduce the insertion loss in the RF path and improve the performance of the RF module.

As a possible design, the working state of the RF module includes a single-pass state and a combined state. When the working state of the RF module is the single-pass state, one and only one switch among the multiple switches is connected. The RF signal is transmitted from the connected switch to the common port, and is transmitted to the antenna through the common port. When the working state of the RF module is the combined state, at least two switches among the multiple switches are connected. The RF signal is transmitted from each connected switch to the common port, and is combined through the common port and transmitted to the antenna. Based on this solution, when the RF module is in the single-pass state, the RF signal is transmitted from the connected switch to the common port. Since the other switches are in the disconnected state, the RF signal will not be transmitted to other switches, but will be transmitted to the antenna through the common port. It is possible It can be seen that when the RF module is in a single-pass state, the transmission path of the RF signal does not include components with large insertion loss, and the loss of the RF signal is small, so the RF performance of the RF module is better. When the RF module is in a combined state, each RF signal is transmitted to the common port by each connected switch. Take the RF signal of the first frequency band and the RF signal of the second frequency band as an example to illustrate the path after the RF signal is transmitted to the common port. After the RF signal of the first frequency band is transmitted to the common port, it is divided into two parts, one part is transmitted to the antenna through the common port, and the other part is transmitted to other connected switches, namely the second switch, through the common port. Since the stop band of the second signal processing unit connected to the second switch covers the first frequency band, the RF signal of the first frequency band cannot pass through the second signal processing unit, but will be reflected to the common port by the second signal processing unit. Similarly, the part of the RF signal of the second frequency band transmitted to the first switch will also be reflected to the common port by the first signal processing unit. It can be seen that when the RF module is in a combined state, the transmission path of the RF signal will not include components with large insertion loss, and the overall insertion loss of the RF module is small.

As a possible design, the signal output port is connected to the common port through a microstrip line. Based on this solution, the reliability of the connection can be improved and it is conducive to the miniaturization and lightness of the RF module.

As a possible design, the length of the microstrip line is less than or equal to a quarter wavelength. Based on this solution, the insertion loss of the microstrip line can be reduced and the RF performance of the RF module can be improved.

As a possible design, the switch is a single-pole multi-throw switch. Based on this solution, the connection relationship between the signal input port and the signal output port of the switch can be conveniently controlled.

As a possible design, the switch is a single-pole four-throw switch. The number of switches is 2. The number of signal input ports in each switch is 4. Based on this solution, multiple combinations of multiple frequency bands can be combined within a wide frequency range to achieve a combining function, which has strong scalability.

As a possible design, the first frequency band is the B1 frequency band, and the second frequency band is the B40 frequency band. Based on this solution, the B1 frequency band and the B40 frequency band can be easily combined.

As a possible design, the number of signal processing units is less than or equal to the number of signal input ports. Based on this solution, the number of signal processing units can be set as needed, and the flexibility and scalability are strong.

As a possible design, the signal processing unit is any one of the following: a notch filter, a high-pass filter, a low-pass filter, and a band-pass filter. Based on this solution, the passband and stopband of the signal processing unit can be conveniently adjusted.

In a second aspect, a radio frequency system is provided, comprising: at least one radio frequency module as described in any one of the first aspect and at least one antenna. Different antennas are connected to common ports in different radio frequency modules.

In a third aspect, an electronic device is provided, comprising a baseband chip and a radio frequency system as in the second aspect. The baseband chip is connected to each signal processing unit in the radio frequency system. The baseband chip is used to send radio frequency signals to each signal processing unit.

It should be understood that the technical solutions provided in the second and third aspects above and their technical features can all correspond to the RF modules provided in the first aspect and its possible designs, so the beneficial effects that can be achieved are similar and will not be repeated here.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a radio frequency module;

FIG2 is a diagram showing the insertion loss and frequency response of a radio frequency module;

FIG3 is a diagram showing the insertion loss and frequency response of another RF module;

FIG4 is a diagram showing the insertion loss and frequency response of another RF module;

FIG5 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

FIG6 is a schematic diagram of a radio frequency module provided in an embodiment of the present application;

FIG7 is a schematic diagram of another radio frequency module provided in an embodiment of the present application;

FIG8 is a graph showing the insertion loss and frequency response of a radio frequency module provided in an embodiment of the present application;

FIG9 is a diagram showing the insertion loss and frequency response of another RF module provided in an embodiment of the present application;

FIG10 is a diagram showing the insertion loss and frequency response of another RF module provided in an embodiment of the present application;

FIG11 is a diagram showing the insertion loss and frequency response of another RF module provided in an embodiment of the present application;

FIG12 is a schematic diagram of yet another radio frequency module;

FIG13 is a schematic diagram of another radio frequency module provided in an embodiment of the present application;

FIG14 is a diagram showing the insertion loss and frequency response of another RF module provided in an embodiment of the present application;

FIG15 is a diagram showing the insertion loss and frequency response of another RF module provided in an embodiment of the present application;

FIG16 is a schematic diagram of another radio frequency module provided in an embodiment of the present application;

FIG17 is a diagram showing the insertion loss and frequency response of another RF module provided in an embodiment of the present application;

FIG18 is a diagram showing the insertion loss and frequency response of another RF module provided in an embodiment of the present application;

FIG19 is a graph showing the insertion loss and frequency response of another RF module provided in an embodiment of the present application.

Detailed ways

The words "first", "second" and "third" in the embodiments of the present application are used to distinguish different objects rather than to limit a specific order. In addition, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way.

In order to facilitate understanding of the embodiments of the present application, the application background of the present application is first introduced below.

Please refer to Figure 1, which is a schematic diagram of a radio frequency module. As shown in Figure 1, the radio frequency module includes a switch a, a switch b and a combiner c. The combiner c includes a signal input port c1, a signal input port c2 and a signal output port c3. Both switch a and switch b are single-pole four-throw switches.

A single-pole four-throw switch consists of a moving end and four fixed ends. The moving end is the port where the "pole" is located, and the fixed end is the port to which the "pole" can choose whether to connect. A single-pole four-throw switch can connect the moving end to any of the four fixed ends through the "pole".

In the RF module shown in FIG1 , the moving end of switch a is connected to the signal input port c1 of combiner c, and the four fixed ends of switch a are respectively connected to RF signals of different frequency bands. The moving end of switch b is connected to the signal input port c2 of combiner c, and the four fixed ends of switch b are respectively connected to RF signals of different frequency bands. The signal output port of combiner c is connected to antenna d.

It can be understood that the RF signal output from switch a and the RF signal output from switch b can be combined by combiner c and then transmitted to antenna d. In this way, RF signals of different frequency bands can share the same antenna, which is conducive to reducing the number of antennas in electronic equipment and improving space utilization in electronic equipment.

However, the combiner is a passive device, and adding a combiner to the RF module will increase the insertion loss of the RF module. This conclusion can be verified by simulating the RF module shown in Figure 1.

When switch a outputs the RF signal of the B1 frequency band and switch b is disconnected, that is, the RF module is in a single-pass state, the relationship between the insertion loss and frequency of the RF module is shown in Figure 2. Please refer to Figure 2, which is a response diagram of the insertion loss and frequency of an RF module. As shown in Figure 2, at point m1, that is, when the frequency is about 2.1GHz, the insertion loss of the RF module is about -3.4dB.

When switch a is disconnected and switch b outputs the RF signal of the B40 frequency band, that is, when the RF module is in a single-pass state, the relationship between the insertion loss and frequency of the RF module is shown in Figure 3. Please refer to Figure 3, which is another insertion loss and frequency response diagram of the RF module. As shown in Figure 3, at point m2, that is, when the frequency is about 2.3GHz, the insertion loss of the RF module is about -3.9dB.

When switch a outputs the RF signal of the B1 frequency band and switch b outputs the RF signal of the B40 frequency band, that is, when the RF module is in the combined state, the relationship between the insertion loss and the frequency of the RF module is shown in Figure 4. Please refer to Figure 4, which is another response diagram of the insertion loss and the frequency of the RF module. Among them, the first curve is the relationship curve between the insertion loss and the frequency of the path where the B1 frequency band is located, that is, the path where switch a is located; the second curve is the relationship curve between the insertion loss and the frequency of the path where the B40 frequency band is located, that is, the path where switch b is located.

In FIG4 , at point m3 in the first curve, that is, when the frequency is about 2.1 GHz, the insertion loss of the path where switch a is located is about -3.4 dB; at point m4 in the second curve, that is, when the frequency is about 2.3 GHz, the insertion loss of the path where switch b is located is about -3.9 dB.

It can be seen that when a combiner is set in the RF module, the insertion loss of the RF module will be larger. Even when the RF module does not need to combine RF signals of different frequency bands, as shown in Figures 2 and 3 above, the insertion loss overhead caused by the combiner still exists, which has a greater impact on the RF performance of the RF module.

In order to solve this problem, the embodiments of the present application provide a radio frequency module, a radio frequency system and an electronic device, which can significantly reduce the insertion loss of the radio frequency module when it is in a single-pass state and improve the radio frequency performance of the radio frequency module.

The RF module and RF system provided in the embodiments of the present application can be applied to electronic devices. The electronic device can refer to a device provided with an antenna and a RF path, such as a mobile phone, a tablet computer, a wearable device (such as a smart watch), a vehicle-mounted device, a laptop computer, a desktop computer, etc. Exemplary embodiments of terminal devices include but are not limited to devices equipped with Or portable terminals with other operating systems.

As an example, please refer to FIG. 5 , which is a schematic diagram of the structure of an electronic device 500 provided in an embodiment of the present application.

As shown in FIG. 5 , the electronic device 500 may include a processor 501 , a communication module 502 , a display screen 503 , and the like.

The processor 501 may include one or more processing units, for example, the processor 501 may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a memory, a video stream codec, a digital signal processor (DSP), a baseband processor, and/or a neural-network processing unit (NPU), etc. Different processing units may be independent devices or integrated in one or more processors 501.

The controller may be the nerve center and command center of the electronic device 500. The controller may generate an operation control signal according to the instruction operation code and the timing signal to complete the control of fetching and executing instructions.

A memory may also be provided in the processor 501 for storing instructions and data. In some embodiments, the memory in the processor 501 is a cache memory. The memory may store instructions or data that the processor 501 has just used or cyclically used. If the processor 501 needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor 501, and thus improves the efficiency of the system.

In some embodiments, the processor 501 may include one or more interfaces. The interface may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input/output (GPIO) interface, a subscriber identity module (SIM) interface, and/or a universal serial bus (USB) interface 511, etc.

The electronic device 500 implements the display function through a GPU, a display screen 503, and an application processor 501. The GPU is a microprocessor for image processing, which connects the display screen 503 and the application processor 501. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 501 may include one or more GPUs, which execute program instructions to generate or change display information.

The display screen 503 is used to display images, video streams, etc.

The communication module 502 may include an antenna x, an antenna y, a mobile communication module 502A, and/or a wireless communication module 502B. For example, the communication module 502 includes the antenna x, the antenna y, the mobile communication module 502A, and the wireless communication module 502B.

The wireless communication function of the electronic device 500 can be implemented through the antenna x, the antenna y, the mobile communication module 502A, the wireless communication module 502B, the modem processor and the baseband processor.

Antenna x and antenna y are used to transmit and receive electromagnetic wave signals. Each antenna in the electronic device 500 can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve the utilization of the antennas. For example, antenna x can be reused as a diversity antenna for a wireless local area network. In some other embodiments, the antenna can be used in combination with a tuning switch.

The mobile communication module 502A can provide solutions for wireless communications including 2G/3G/4G/5G applied to the electronic device 500. The mobile communication module 502A may include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), etc. The mobile communication module 502A may receive electromagnetic waves through the antenna x, and perform filtering, amplification, and other processing on the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation. The mobile communication module 502A may also amplify the signal modulated by the modulation and demodulation processor, and convert it into electromagnetic waves for radiation through the antenna x. In some embodiments, at least some of the functional modules of the mobile communication module 502A may be arranged in the processor 501. In some embodiments, at least some of the functional modules of the mobile communication module 502A may be arranged in the same device as at least some of the modules of the processor 501.

The modem processor may include a modulator and a demodulator. Among them, the modulator is used to modulate the low-frequency baseband signal to be sent into a medium-high frequency signal. The demodulator is used to demodulate 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 the low-frequency baseband signal is processed by the baseband processor, it is passed to the application processor. The application processor outputs a sound signal through an audio device (not limited to a speaker 506A, a receiver 506B, etc.), or displays an image or video stream through a display screen 503. In some embodiments, the modem processor may be an independent device. In other embodiments, the modem processor may be independent of the processor 501 and be set in the same device as the mobile communication module 502A or other functional modules.

The wireless communication module 502B can provide wireless communication solutions including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) network), bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR) and the like applied to the electronic device 500. The wireless communication module 502B can be one or more devices integrating at least one communication processing module. The wireless communication module 502B receives electromagnetic waves via antenna y, modulates the frequency of the electromagnetic wave signal and performs filtering processing, and sends the processed signal to the processor 501. The wireless communication module 502B can also receive the signal to be sent from the processor 501, modulate the frequency of the signal, amplify the signal, and convert it into electromagnetic waves for radiation via antenna y.

In some embodiments, the antenna x of the electronic device 500 is coupled to the mobile communication module 502A, and the antenna y is coupled to the wireless communication module 502B, so that the electronic device 500 can communicate with the network and other devices through 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), BT, GNSS, WLAN, NFC, FM, and/or IR technology. The GNSS may include a global positioning system (GPS), a global navigation satellite system (GLONASS), a Beidou navigation satellite system (BDS), a quasi-zenith satellite system (QZSS) and/or a satellite based augmentation system (SBAS).

As shown in FIG5 , in some implementations, the electronic device 500 may further include an external memory interface 150, an internal memory 504, a universal serial bus (USB) interface 511, a charging management module 512, a power management module 513, a battery 514, an audio module 506, a speaker 506A, a receiver 506B, a microphone 506C, an earphone interface 506D, a sensor module 505, a button 509, a motor, an indicator 508, a camera 507, and a user identification module. Subscriber identification module (SIM) card interface, etc.

The charging management module 512 is used to receive charging input from a charger. The charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 512 may receive charging input from a wired charger through a USB interface 511. In some wireless charging embodiments, the charging management module 512 may receive wireless charging input through a wireless charging coil of the electronic device 500. While the charging management module 512 is charging the battery 514, it may also power the electronic device 500 through the power management module 513.

The power management module 513 is used to connect the battery 514, the charging management module 512 and the processor 501. The power management module 513 receives input from the battery 514 and/or the charging management module 512, and supplies power to the processor 501, the internal memory 504, the external memory, the display screen 503, the camera 507, and the wireless communication module 502B. The power management module 513 can also be used to monitor parameters such as the capacity of the battery 514, the number of cycles of the battery 514, and the health status (leakage, impedance) of the battery 514. In some other embodiments, the power management module 513 can also be set in the processor 501. In other embodiments, the power management module 513 and the charging management module 512 can also be set in the same device.

The external memory interface 150 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device 500. The external memory card communicates with the processor 501 through the external memory interface 150 to implement a data storage function. For example, files such as music and video streams are saved in the external memory card.

The internal memory 504 may be used to store computer executable program codes, which include instructions. The processor 501 executes various functional applications and data processing of the electronic device 500 by running the instructions stored in the internal memory 504 .

The internal memory 504 may also store one or more computer programs corresponding to the data transmission method provided in the embodiments of the present application.

The electronic device 500 can implement audio functions such as music playing and recording through the audio module 506, the speaker 506A, the receiver 506B, the microphone 506C, the headphone interface 506D, and the application processor 501.

The key 509 includes a power key, a volume key, etc. The key 509 may be a mechanical key 509 or a touch key 509. The electronic device 500 may receive the key 509 input and generate a key signal input related to the user setting and function control of the electronic device 500.

Indicator 508 may be an indicator light, which may be used to indicate charging status, power changes, messages, missed calls, notifications, etc.

The SIM card interface is used to connect the SIM card. The SIM card can be connected to and separated from the electronic device 500 by inserting it into the SIM card interface or pulling it out from the SIM card interface. The electronic device 500 can support 1 or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface can support Nano SIM card, Micro SIM card, SIM card, etc. Multiple cards can be inserted into the same SIM card interface at the same time. The types of the multiple cards can be the same or different. The SIM card interface can also be compatible with different types of SIM cards. The SIM card interface can also be compatible with external memory cards. The electronic device 500 interacts with the network through the SIM card to realize functions such as calls and data communications. In some embodiments, the electronic device 500 uses an eSIM, i.e., an embedded SIM card. The eSIM card can be embedded in the electronic device 500 and cannot be separated from the electronic device 500.

The sensor module 505 in the electronic device 500 may include touch sensors, pressure sensors, gyroscope sensors, air pressure sensors, magnetic sensors, acceleration sensors, distance sensors, proximity light sensors, ambient light sensors, fingerprint sensors, temperature sensors, bone conduction sensors and other components to realize the sensing and/or acquisition functions of different signals.

It is to be understood that the structure illustrated in this embodiment does not constitute a specific limitation on the electronic device 500. In other embodiments, the electronic device 500 may include more or fewer components than shown in the figure, or combine some components, or separate some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

Based on the above description of the structure of the electronic device, the RF module provided in the embodiment of the present application is specifically introduced below. It should be noted that the radio frequency module provided in the embodiment of the present application is used to transmit or receive signals through an antenna.

Please refer to Figure 6, which is a schematic diagram of a radio frequency module provided in an embodiment of the present application. As shown in Figure 6, the radio frequency module includes: multiple switches 601, multiple signal processing units 602, and a common port 603. It should be noted that the number of switches 601, the number of signal processing units 602, the number of signal input ports 621, etc. in Figure 6 are only for illustration and do not mean that the present application is limited to this. In actual applications, the number of switches 601 is greater than or equal to 2, the number of signal processing units 602 is greater than or equal to 2, and the number of signal input ports 621 is greater than or equal to 2.

It should be noted that the signal processing unit can be a high-pass filter, a low-pass filter, a band-pass filter, etc., which is not specifically limited here.

The switch 601 includes a signal output port 611 and a plurality of signal input ports 621. The signal output port 611 is connected to the common port 603. The switch 601 is used to connect or disconnect the signal output port 611 with any signal input port 621. In other words, the switch 601 can only select one of the plurality of signal input ports 621 to connect to the signal output port 611 at most.

In an embodiment of the present application, the signal output port 611 and the common port 603 can be connected by a microstrip line. In this way, the reliability of the connection can be improved, and it is conducive to the miniaturization and lightweight of the RF module. In addition, the length of the microstrip line can be less than or equal to a quarter wavelength, so that the insertion loss of the microstrip line can be reduced and the RF performance of the RF module can be improved. It should be understood that the above-mentioned quarter wavelength refers to a quarter of the minimum wavelength of the wavelength of the RF signal received by the switch corresponding to the signal output port 611. Exemplarily, the first switch 601a includes the B40 frequency band and the B41 frequency band, then the length of the microstrip line between the signal output port corresponding to the first switch 601a and the common port 603 can be less than a quarter of the corresponding wavelength of the RF signal with the maximum frequency in the B41 frequency band.

The common port 603 is also connected to the antenna. That is, one end of the common port 603 is connected to the signal output port 611 of each switch 601, and the other end is connected to the antenna. It can be understood that when the antenna transmits a signal, the corresponding radio frequency signal is transmitted to the antenna through the common port 603; when the antenna receives a signal, the corresponding radio frequency signal is transmitted from the antenna to the common port 603.

Different signal processing units 602 are connected to different signal input ports 621. That is, one signal processing unit 602 corresponds to one signal input port 621. It should be noted that in the embodiment of the present application, different signal processing units do not refer to signal processing units having different stopbands, passbands and other properties, but refer to signal processing units of different physical entities. For example, two signal processing units with exactly the same stopbands, passbands and other properties may also be referred to as different signal processing units in the embodiment of the present application. In addition, it should be understood that under the above definition, the number of signal processing units is less than or equal to the number of signal input ports.

It should be noted that the stopband of a signal processing unit refers to a frequency band that cannot be covered by the radio frequency signal of the signal processing unit, and the passband of a signal processing unit refers to a frequency band that can be covered by the radio frequency signal of the signal processing unit.

The multiple switches 601 include a first switch 601a and a second switch 601b. The first switch 601a receives a radio frequency signal of a first frequency band through a first signal processing unit 602a. The second switch 601b receives a radio frequency signal of a second frequency band through a second signal processing unit 602b.

It should be understood that the first switch 601a can receive a radio frequency signal of the first frequency band through the first signal processing unit 602a, indicating that the passband of the first signal processing unit 602a covers the first frequency band. Similarly, the second switch 601b can receive a radio frequency signal of the second frequency band through the second signal processing unit 602b, indicating that the passband of the second signal processing unit 602b covers the second frequency band.

The stop band of the first signal processing unit 602a covers the second frequency band, and the stop band of the second signal processing unit 602b covers the first frequency band. It can be understood that such a design can prevent the RF signal of the first frequency band from passing through the second signal processing unit 602b, and the RF signal of the second frequency band from passing through the first signal processing unit 602a, thereby reducing the loss of the RF signal and improving the RF performance of the RF module.

The first switch 601a and the second switch 601b are any two switches in the plurality of switches 601. The first signal processing unit 602a is any signal processing unit connected to the first switch 601a, and the second signal processing unit 602b is any signal processing unit connected to the second switch 601b. The first frequency band and the second frequency band are two different arbitrary frequency bands. In the example, two different frequency bands refer to two frequency bands that have no intersection at all. For example, the frequency covered by frequency band m is 1000MHz-1500MHz, and the frequency covered by frequency band n is 1600MHz-2000MHz, then frequency band m and frequency band n are two different frequency bands. For another example, the frequency covered by frequency band t is 1300MHz-1800MHz, then frequency band m and frequency band t are not two different frequency bands, and frequency band n and frequency band t are not two different frequency bands.

The above takes any two switches among the multiple switches as an example to introduce the RF module provided by the embodiment of the present application. The above description of the characteristics of any two switches can directly and unambiguously determine the connection relationship between all switches and the signal processing unit in the RF module provided by the embodiment of the present application, the relationship between the passband, stopband, and frequency band of the RF signal of the signal processing unit, etc., which will not be repeated here.

It can be understood that when all switches except the first switch and the second switch are disconnected among the multiple switches, the RF module provided in the above embodiment of the present application has at least three working states, namely: the first switch is connected and the second switch is disconnected; the first switch is disconnected and the second switch is connected; the first switch and the second switch are both connected. Among them, the working state in which the first switch is connected and the second switch is disconnected and the working state in which the first switch is disconnected and the second switch is connected can both be called a single-pass state. The working state in which the first switch and the second switch are both connected can be called a closed-circuit state.

It should be noted that switch connection means that the signal output port of the switch is connected to one of the signal input ports, and switch disconnection means that the signal output port of the switch is not connected to any signal input port. In addition, when only one of the above multiple switches is connected, the RF module can be called a single-pass state; when at least two of the above multiple switches are connected, the RF module can be called a combined state. Taking the first switch and the second switch as examples is only for ease of explanation, and does not mean that the present application is limited to this.

For ease of explanation, the single-pass state of the RF module is first described below by taking the case where the first signal input port of the first switch is connected to the signal output port and the second switch is disconnected as an example. The first signal input port is a signal input port connected to the first signal processing unit.

The RF signal of the first frequency band is first transmitted to the first signal processing unit; since the passband of the first signal processing unit covers the first frequency band, the RF signal of the first frequency band can pass through the first signal processing unit and be transmitted to the first signal input port of the first switch; the first signal input port and the signal output port are connected, so the RF signal of the first frequency band is transmitted to the signal output port of the first switch; the RF signal of the first frequency band is transmitted from the signal output port of the first switch to the common port; since other switches are disconnected, the RF signal of the first frequency band is transmitted from the common port to the antenna and emitted by the antenna.

It should be noted that in the embodiment of the present application, there are multiple signal processing units connected to the first switch, and there are multiple signal processing units connected to the second switch. The frequencies of the signal processing unit connected to the first switch and the signal processing unit connected to the second switch are different, and they can be combined in pairs to realize the function of the combiner. The above description takes the first switch, the first signal processing unit connected to the first switch, the second switch, and the second signal processing unit connected to the second switch as an example, and does not mean that the present application is limited to this.

It can be seen that in the RF module provided in the embodiment of the present application, when only one switch is connected and the other switches are disconnected, that is, in a single-pass state, there is no component with large insertion loss in the transmission path of the RF signal. Therefore, the overall insertion loss of the RF module is small and the RF performance is also good.

The following describes the single-pass state of the RF module by taking the second signal input port of the second switch connected to the signal output port and the first switch disconnected as an example, wherein the second signal input port is a signal input port connected to the second signal processing unit.

The RF signal of the second frequency band is first transmitted to the second signal processing unit; since the passband of the second signal processing unit covers the second frequency band, the RF signal of the second frequency band can pass through the second signal processing unit and be transmitted to the second signal input port of the second switch; the second signal input port and the signal output port are connected, so the RF signal of the second frequency band is transmitted to the signal output port of the second switch; the RF signal of the second frequency band is transmitted from the signal output port of the second switch to the common port; since other switches are disconnected, the RF signal of the second frequency band is transmitted from the common port to the antenna and emitted by the antenna.

In the single-pass state in which the first signal input port of the first switch is connected to the signal output port and the second switch is disconnected, the second signal input port of the second switch is connected to the signal output port. When the first switch is disconnected, there is no component with large insertion loss in the transmission path of the RF signal. Therefore, the overall insertion loss of the RF module is small and the RF performance is also good.

Finally, the combination state of the RF module is explained by taking the first signal input port and the signal output port in the first switch being connected, and the second signal input port and the signal output port in the second switch being connected as an example.

Before being transmitted to the common port, the RF signal of the first frequency band and the RF signal of the second frequency band are the same as those in the above-mentioned single-pass state. When the RF signal of the first frequency band is transmitted to the common port, a part of it can be combined with the RF signal of the second frequency band and then transmitted to the antenna, and the other part can be transmitted in reverse along the transmission path of the RF signal of the second frequency band to the second signal processing unit; since the stop band of the second signal processing unit covers the first frequency band, the RF signal of the first frequency band cannot flow through the second signal processing unit, and will be reflected to the common port, combined with the RF signal of the second frequency band and then transmitted to the antenna. Similarly, when the RF signal of the second frequency band is transmitted to the common port, a part of it can be combined with the RF signal of the first frequency band and then transmitted to the antenna, and the other part can be transmitted to the first signal processing unit along the transmission path of the RF signal of the first frequency band; since the stop band of the first signal processing unit covers the second frequency band, the RF signal of the second frequency band cannot flow through the first signal processing unit, and will be reflected to the common port, combined with the RF signal of the first frequency band and then transmitted to the antenna.

It needs to be emphasized again that the above description only takes the first switch, the first signal processing unit connected to the first switch, the second switch, and the second signal processing unit connected to the second switch as an example. In an embodiment of the present application, there are multiple switches and multiple signal processing units connected to the switches. Among them, the frequencies of the signal processing units connected to different switches are different. The signal processing unit connected to any switch satisfies that its passband is covered by the stopband of the signal processing unit connected to other switches, and its stopband covers the passband of the signal processing unit connected to other switches. In this way, any two signal processing units connected to different switches can be combined in pairs to realize the function of a combiner, and the overall insertion loss of the RF module is less affected, which is beneficial to improving the performance of the RF module.

The structure and common state of the RF module provided in the embodiment of the present application are introduced above. It can be seen that the RF module does not include components with large insertion loss such as a combiner, so the insertion loss in the RF path can be reduced and the performance of the RF module can be improved.

The RF module shown in Figure 7 is simulated below, and the simulation results are compared with the simulation results of the RF module shown in Figure 1 to verify that the RF module provided in the embodiment of the present application can indeed reduce the insertion loss in the RF path and improve the RF performance of the RF module compared with the RF module in the related technology.

Please refer to Figure 7, which is a schematic diagram of another RF module provided in an embodiment of the present application. As shown in Figure 7, the RF module includes two single-pole four-throw switches, respectively referred to as the third switch 701 and the fourth switch 702; the number of signal input ports in the third switch 701 and the fourth switch 702 is 4, respectively set at the fixed ends of the corresponding switches. The third switch 701 is connected to the RF signal of the B1 frequency band through the third trap 703, and is also connected to the RF signal of the B2 frequency band through the fourth trap 704. The fourth switch 702 is connected to the RF signal of the B41 frequency band through the fifth trap 705, connected to the RF signal of the B40 frequency band through the sixth trap 706, and connected to the RF signal of the B7 frequency band through the seventh trap 707. Among them, the passband of the third trap filter 703 covers the B1 frequency band, and the stopband covers the B7 frequency band, the B40 frequency band and the B41 frequency band; the passband of the fourth trap filter 704 covers the B2 frequency band, and the stopband covers the B7 frequency band, the B40 frequency band and the B41 frequency band; the passband of the fifth trap filter 705 covers the B41 frequency band, and the stopband covers the B1 frequency band and the B2 frequency band; the passband of the sixth trap filter 706 covers the B40 frequency band, and the stopband covers the B1 frequency band and the B2 frequency band; the passband of the seventh trap filter 707 covers the B7 frequency band, and the stopband covers the B1 frequency band and the B2 frequency band.

Taking the case where the signal output port of the third switch in FIG. 7 is connected to the signal input port connected to the third notch filter to output the RF signal of the B1 frequency band, and the fourth switch is disconnected as an example, the insertion loss of the RF module in the single-pass state is explained through FIG. 8.

Please refer to Figure 8, which is a response diagram of insertion loss and frequency of a radio frequency module provided in an embodiment of the present application. As shown in Figure 8, in the B1 frequency band, such as point m5, that is, when the frequency is about 2.1 GHz, the insertion loss of the radio frequency module is about -2.85 GHz.

As can be seen from the above Figure 2, the RF module shown in Figure 1 outputs a RF signal in the B1 frequency band when switch a is turned on. When switch b is turned off, the insertion loss of the RF module corresponding to the frequency of 2.1 GHz is about -3.4 dB.

In the following, taking the case where the signal output port of the fourth switch in FIG. 7 is connected to the signal input port connected to the sixth trap filter, and the RF signal of the B40 frequency band is output, and the third switch is disconnected as an example, the insertion loss of the RF module when it is in the single-pass state is explained through FIG. 9.

Please refer to Figure 9, which is another insertion loss and frequency response diagram of a radio frequency module provided in an embodiment of the present application. As shown in Figure 9, in the B40 frequency band, such as point m6, that is, when the frequency is about 2.3 GHz, the insertion loss of the radio frequency module is about -2.9 dB.

As can be seen from FIG3 , when switch a of the RF module shown in FIG1 is disconnected and switch b outputs a RF signal in the B40 frequency band, the insertion loss of the RF module corresponding to a frequency of 2.3 GHz is approximately -3.9 dB.

Through the above comparison between FIG. 2 and FIG. 8 , and the comparison between FIG. 9 and FIG. 3 , it can be seen that the insertion loss gain of the RF module provided in the embodiment of the present application in the single-pass state is between 0.55 dB and 1 dB.

Therefore, compared with the RF module in the related art, the RF module provided in the embodiment of the present application can significantly reduce the insertion loss in the RF path when the RF module is in the single-pass state, thereby helping to improve the RF performance of the RF module.

Taking the example below where the signal output port of the third switch in Figure 7 is connected to the signal input port connected to the third notch filter, and outputs the RF signal of the B1 frequency band, and the signal output port of the fourth switch is connected to the signal input port connected to the sixth notch filter, and outputs the RF signal of the B40 frequency band, the insertion loss of the B1 frequency band when the RF module is in the combined state is explained through Figure 10.

Please refer to Figure 10, which is a response diagram of insertion loss and frequency of another RF module provided in an embodiment of the present application. As shown in Figure 10, at point m7, i.e., around 2.1 GHz, the insertion loss of the RF module is about -3.36 dB.

As can be seen from the above FIG4 , when the RF module shown in FIG1 outputs the RF signal of the B1 frequency band through switch a and the RF signal of the B40 frequency band through switch b, the insertion loss of the RF module corresponding to 2.1 GHz is about -3.4 dB.

In the following, taking the case where the signal output port of the third switch in FIG7 is connected with the signal input port connected with the third filter to output the RF signal of the B1 frequency band, and the signal output port of the fourth switch is connected with the signal input port connected with the sixth filter to output the RF signal of the B40 frequency band as an example, FIG10 illustrates the insertion loss of the B40 frequency band when the RF module is in the combined state.

Please refer to Figure 11, which is a response diagram of insertion loss and frequency of another RF module provided in an embodiment of the present application. As shown in Figure 11, at point m8, i.e., around 2.3 GHz, the insertion loss of the RF module is about -4.05 dB.

As can be seen from the above FIG4 , when the RF module shown in FIG1 outputs the RF signal of the B1 frequency band through switch a and the RF signal of the B40 frequency band through switch b, the insertion loss of the RF module corresponding to 2.3 GHz is about -3.9 dB.

Therefore, through the comparison between Figure 10 and Figure 4, and the comparison between Figure 11 and Figure 4, it can be seen that, compared with the RF module in the related art, the insertion loss in the RF path of the RF module provided in the embodiment of the present application is basically the same when the RF module is in the combined state, with a small difference.

In summary, the RF module provided in the embodiment of the present application can reduce the insertion loss in the RF module, especially the insertion loss when the RF module is in a single-pass state, thereby improving the RF performance of the RF module.

It should be understood that the above simulation only uses the B1 band and the B40 band as examples to illustrate that the insertion loss of the RF module provided in the embodiment of the present application is small, and does not mean that the present application is limited to this. For example, in the B1 band + B41 band, the B1 band + B7 band, the B3 band + B40 band, the B3 band + B41 band, the B3 band + B7 band, etc., the insertion loss of the RF module provided in the embodiment of the present application is smaller than the insertion loss of the RF module in the related art.

For example, here we take the combination of the B32 band RF signal and the intermediate frequency RF signal as an example to illustrate that the RF module provided by the embodiment of the present application has a small single-pass state insertion loss. In the embodiment of the present application, the frequency range covered by the intermediate frequency is about 1.7 GHz to 2.2 GHz.

Please refer to Figure 12, which is a schematic diagram of another RF module. The RF module used in the related solution to combine the RF signal of the B32 frequency band and the RF signal of the intermediate frequency is shown in Figure 12, wherein the RF signal of the B32 frequency band and the RF signal of the intermediate frequency are combined through a combiner. By querying the data in the related solution, it can be known that the RF module shown in Figure 12 is in B32 In the single-pass state of the intermediate frequency, the insertion loss is about -1.04dB; in the single-pass state of the intermediate frequency, the insertion loss is about -0.62dB.

When the RF module provided in the embodiment of the present application combines the RF signal of the B32 frequency band and the RF signal of the intermediate frequency, the structure of the RF module can be as shown in Figure 13. Please refer to Figure 13, which is a schematic diagram of another RF module provided in the embodiment of the present application. The RF module includes a fifth switch 1301, a sixth switch 1302, an eighth notch filter 1303, a ninth notch filter 1304 and a common port 1305. Among them, the fifth switch 1301 is a single-pole double-throw switch, and the sixth switch 1302 is a diversity (DRX) common port 1305. The fifth switch 1301 includes two signal input ports, one of which is connected to the RF signal of the B32 frequency band through the eighth notch filter 1303, and the other is vacant. The fifth switch 1301 also includes a signal output terminal connected to the common port 1305. The signal input port of the sixth switch 1302 is connected to the RF signal of the intermediate frequency, and the signal output terminal is connected to the common port 1305 through the ninth notch filter 1304. The sixth switch 1302 is used to disconnect or connect the signal input port and the signal output port of the sixth switch 1302. The stopband of the eighth notch filter 1303 covers the intermediate frequency, and the passband covers the B32 frequency band; the stopband of the ninth notch filter 1304 covers the B32 frequency band, and the passband covers the intermediate frequency.

Taking the example in which the fifth switch in FIG. 13 outputs a radio frequency signal in the B32 frequency band and the sixth switch is disconnected, FIG. 14 illustrates the insertion loss of the radio frequency module provided in the embodiment of the present application when it is in the B32 single-pass state.

Please refer to Figure 14, which is another insertion loss and frequency response diagram of a radio frequency module provided in an embodiment of the present application. As shown in Figure 14, near point m9, that is, when the frequency is between 1.452 GHz and 1.496 GHz, the insertion loss of the radio frequency module is between -1.341 dB and -1.307 dB.

Taking the example in which the sixth switch in FIG. 13 outputs an intermediate frequency RF signal and the fifth switch is disconnected, FIG. 15 is used to illustrate the insertion loss of the RF module provided in the embodiment of the present application when it is in the intermediate frequency single-pass state.

Please refer to Figure 15, which is a response diagram of insertion loss and frequency of another RF module provided in an embodiment of the present application. As shown in Figure 15, near the m10 point, that is, when the frequency is between 1.920GHz and 2.170GHz, the insertion loss of the RF module is between -0.742dB and -0.735dB.

It can be seen that no matter in the B32 single-pass state or the intermediate frequency single-pass state, the insertion loss of the RF module provided in the embodiment of the present application as shown in FIG13 is smaller than that of the RF module in the related art as shown in FIG12 .

When in the combined state, the insertion loss of the RF module provided in the embodiment of the present application as shown in FIG. 13 is substantially the same as that of the RF module in the related art as shown in FIG. 12 .

Based on the above Figures 12-15, it can be seen that the RF module provided in the embodiment of the present application can reduce the insertion loss in the RF module, especially the insertion loss when the RF module is in a single-pass state, thereby improving the RF performance of the RF module.

Compared with the radio frequency module in the related art, the radio frequency module provided in the embodiment of the present application does not include a combiner, but adds a notch filter. The following simulation illustrates that the insertion loss caused by adding the notch filter is small.

Please refer to Figure 16, which is a schematic diagram of another radio frequency module provided in an embodiment of the present application. As shown in Figure 16, the radio frequency module includes an eighth switch 1601, a ninth switch 1602, a tenth wave trap 1603, an eleventh wave trap 1604, a first matching element 1605, a second matching element 1606, a third matching element 1607, a fourth matching element 1608 and a common port.

The eighth switch 1601 includes a signal input port, which is sequentially connected to the radio frequency signal of the B41 frequency band through the first matching element 1605 and the tenth notch filter 1603. The ninth switch 1602 includes a signal input port, which is sequentially connected to the radio frequency signal of the intermediate frequency through the second matching element 1606 and the eleventh notch filter 1604.

The signal output end of the eighth switch 1601 is connected to the common port through the third matching element 1607 , and the signal output end of the ninth switch 1602 is connected to the common port through the fourth matching element 1608 .

The eighth switch 1601 is used to connect or disconnect the corresponding signal input port and the signal output port. Similarly, the ninth switch 1602 is used to connect or disconnect the corresponding signal input port and the signal output port.

The stopband of the tenth notch filter 1603 covers the intermediate frequency, and the passband covers the B41 frequency band. The stopband of the eleventh notch filter 1604 covers the B41 frequency band, and the passband covers the intermediate frequency.

In the embodiment of the present application, the first matching element may be a capacitor, an inductor, etc. The second matching element, the third matching element, and the fourth matching element are similar, and are not described in detail here.

For the sake of comparison, a RF module p is defined. Compared with the RF module shown in FIG16 above, the RF module p does not include the tenth trap and the eleventh trap, and the rest is exactly the same as the RF module shown in FIG16 above.

First, the RF module p is simulated to determine the insertion loss when the RF module shown in Figure 16 does not include a notch filter. Please refer to Figure 17, which is a response diagram of insertion loss and frequency of another RF module provided in an embodiment of the present application. As shown in Figure 17, in the intermediate frequency single-pass state, that is, the frequency is between 1.71.GHz-2.200GHz, the insertion loss of the RF module p is between -0.451dB and 0.394dB. In the B41 single-pass state, that is, the frequency is between 2.496GHz-2.690GHz, the insertion loss of the RF module p is between -0.498dB and 0.489dB.

Next, the RF module shown in Fig. 16 is simulated when the ninth switch is disconnected and the eighth switch outputs the RF signal of the B41 frequency band. Fig. 18 illustrates the insertion loss of the RF module shown in Fig. 16 in the B41 single-pass state.

Please refer to Figure 18, which is a response diagram of insertion loss and frequency of another RF module provided in an embodiment of the present application. As shown in Figure 18, in the B41 single pass state, that is, the frequency is between 2.496GHz-2.690GHz, the insertion loss of the RF module shown in Figure 16 is between -0.812dB and 0.775dB.

Next, the RF module shown in Fig. 16 is simulated when the eighth switch is disconnected and the ninth switch outputs an intermediate frequency RF signal. Fig. 19 illustrates the insertion loss of the RF module shown in Fig. 16 in the intermediate frequency single pass state.

Please refer to Figure 19, which is a response diagram of insertion loss and frequency of another RF module provided in an embodiment of the present application. As shown in Figure 19, in the intermediate frequency single pass state, that is, the frequency is between 1.71.GHz-2.200GHz, the insertion loss of the RF module shown in Figure 16 is between -0.801dB and 0.530dB.

It can be seen that compared with the RF module p, after the RF module provided in the embodiment of the present application is provided with a notch filter, the insertion loss in the single-pass state increases by about 0.3 dB.

The insertion loss of the RF module shown in FIG16 in the combined state is increased by about 2dB compared to the single-pass state.

Therefore, in summary, in the RF module provided in the embodiment of the present application, the insertion loss increased by adding the notch filter is small, and therefore the impact on the RF performance of the RF module is also small.

The embodiment of the present application further provides a radio frequency system, comprising: a plurality of radio frequency modules as in any of the above embodiments and a plurality of antennas. Different antennas are connected to common ports in different radio frequency modules.

The embodiment of the present application also provides an electronic device, comprising a baseband chip and the above-mentioned radio frequency system. The baseband chip is connected to each notch filter in the radio frequency system. The baseband chip is used to send a radio frequency signal to each notch filter.

The terminal antenna provided by the present application is described above in combination with specific features and embodiments thereof. Obviously, various modifications and combinations of the above features may be made without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the attached claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A radio frequency module, characterized in that it is used to transmit or receive radio frequency signals through an antenna; the radio frequency module comprises:

Multiple switches, multiple signal processing units and common ports;

The switch comprises a signal output port and a plurality of signal input ports; the signal output port is connected to the common port; the common port is connected to the antenna; different signal processing units are connected to different signal input ports;

The switch is used to connect or disconnect the signal output port and any of the signal input ports; the signal processing unit has a passband and a stopband, and the signal processing unit allows the RF signal of the frequency band covered by the passband to pass through, and prevents the RF signal of the frequency band covered by the stopband from passing through;

The multiple switches include a first switch and a second switch; the first switch receives a radio frequency signal of a first frequency band through a first signal processing unit; the second switch receives a radio frequency signal of a second frequency band through a second signal processing unit;

The passband of the first signal processing unit and the stopband of the second signal processing unit cover the first frequency band; the stopband of the first signal processing unit and the passband of the second signal processing unit cover the second frequency band;

The first switch and the second switch are any two switches among the multiple switches; the first signal processing unit is any signal processing unit connected to the first switch, and the second signal processing unit is any signal processing unit connected to the second switch; the first frequency band and the second frequency band are two different arbitrary frequency bands.
The radio frequency module according to claim 1, characterized in that the working state of the radio frequency module includes a single-pass state and a combined state;

When the working state of the RF module is a single-pass state, only one of the multiple switches is connected; the RF signal is transmitted from the connected switch to the common port, and then transmitted to the antenna through the common port;

When the working state of the RF module is the combined state, at least two switches among the multiple switches are connected; the RF signal is transmitted from each connected switch to the common port, and is combined through the common port and transmitted to the antenna.
The radio frequency module according to claim 1 is characterized in that the signal output port and the common port are connected via a microstrip line.
The RF module according to claim 3 is characterized in that the length of the microstrip line is less than or equal to a quarter wavelength.
The radio frequency module according to claim 1 is characterized in that the switch is a single-pole multi-throw switch.
The radio frequency module according to claim 1 is characterized in that the switch is a single-pole four-throw switch; the number of the switches is 2; and the number of signal input ports in each of the switches is 4.
The radio frequency module according to claim 1 is characterized in that the first frequency band is a B1 frequency band, and the second frequency band is a B40 frequency band.
The radio frequency module according to claim 1 is characterized in that the number of the signal processing units is less than or equal to the number of the signal input ports.
The radio frequency module according to claim 1 is characterized in that the signal processing unit is any one of the following: a notch filter, a high-pass filter, a low-pass filter, and a band-pass filter.
A radio frequency system, characterized in that it comprises: at least one radio frequency module as described in any one of claims 1 to 9 and at least one antenna; different antennas are connected to common ports in different radio frequency modules.
An electronic device, characterized in that it comprises a baseband chip and the radio frequency system as claimed in claim 10; the baseband chip is connected to each signal processing unit in the radio frequency system; the baseband chip is used to send radio frequency signals to each signal processing unit.