CN118631279A - Communication device and antenna switching method - Google Patents

Abstract

The present application relates to a communication device and an antenna switching method. The communication device includes: a radio frequency transceiver circuit for supporting the transceiver processing of satellite signals; a switch circuit, respectively connected to the radio frequency transceiver circuit and at least two antennas, for selecting a path between any antenna and the radio frequency transceiver circuit; a processing circuit, connected to the switch circuit, for determining a target antenna from a plurality of antennas according to an audio output mode of the communication device, and controlling the conduction state of the switch circuit to support the transceiver of satellite signals through the target antenna; wherein the audio output mode includes an earpiece mode or a speaker mode, and the communication device meets the specific absorption rate requirements in the earpiece mode. The present application can support satellite communications in earpiece mode and speaker mode, and improves the satellite communication performance of the communication device.

Description

Communication device and antenna switching method

Technical Field

The present application relates to the field of communication technology, and in particular to a communication device and an antenna switching method.

Background Art

With the development of communication technology, users have higher and higher performance requirements for communication equipment. More and more communication equipment is integrated with satellite communication functions, especially in remote mountainous areas, at sea and in aviation. Due to the limited coverage distance of mobile base stations on land, there may be no signal or no service, and the urgent demand for satellite communication is becoming more and more urgent. However, current communication equipment often only supports a single speaker mode.

Summary of the invention

The present application provides a communication device and an antenna switching method, which can support satellite communications in earpiece mode and speaker mode, and improve the satellite communication performance of the communication device.

In a first aspect, an embodiment of the present application provides a communication device, including:

Radio frequency transceiver circuit, used to support the transceiver processing of satellite signals;

A switch circuit, connected to the radio frequency transceiver circuit and at least two antennas, respectively, and used to select a path between any antenna and the radio frequency transceiver circuit;

A processing circuit is connected to the switching circuit, and is used to determine a target antenna from the multiple antennas according to an audio output mode of the communication device, and control the conduction state of the switching circuit to support the reception and transmission of satellite signals through the target antenna; wherein the audio output mode includes a handset mode or a speaker mode, and the communication device meets a preset antenna specific absorption rate requirement in the handset mode.

In a second aspect, an embodiment of the present application provides an antenna switching method, which is applied to the aforementioned communication device, and the method includes:

Determining an audio output mode of the communication device; wherein the audio output mode includes a handset mode or a speaker mode;

The conduction state of the switch circuit in the communication device is controlled according to the audio output mode to support the transmission and reception of satellite signals through the target antenna of the communication device.

The above-mentioned communication device and antenna switching method determine the target antenna from at least two antennas according to the audio output mode through the processing circuit, and control the conduction state of the switch circuit, so that the switch circuit selects to conduct the path between the target antenna and the radio frequency transceiver circuit, so that different antennas support the transmission and reception of satellite signals in the handset mode and the speaker mode, and realizes that the communication device supports satellite communication in the handset mode and the speaker mode. Among them, by arranging at least two antennas at different positions of the communication device, the communication device reduces the influence of the human head on the performance of the antenna supporting the handset mode in the handset mode, and can meet the SAR requirements, thereby meeting the satellite communication needs in the handset mode.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions are 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 creative work.

FIG1 is a schematic diagram of a structure of a communication device according to an embodiment;

FIG2 is a second schematic diagram of the structure of a communication device provided by an embodiment;

FIG3 is a third schematic diagram of the structure of a communication device provided by an embodiment;

FIG4 is a fourth schematic diagram of the structure of a communication device provided by an embodiment;

FIG5 is a fifth structural diagram of a communication device provided by an embodiment;

FIG6 is a sixth structural diagram of a communication device provided by an embodiment;

FIG7 is a seventh schematic diagram of the structure of a communication device provided by an embodiment;

FIG8 is an eighth structural diagram of a communication device provided by an embodiment;

FIG9 is a schematic flow chart of an antenna switching method provided by an embodiment;

FIG10 is a schematic diagram of an interface for displaying antenna switching of a communication device provided by an embodiment;

FIG11 is a timing diagram of a communication device transmitting and receiving satellite signals during satellite communication provided by an embodiment;

FIG12 is a schematic diagram of a timing simulation when a communication device provided by an embodiment switches between a handset mode and a speaker mode in a satellite communication scenario.

Description of reference numerals:

1-communication device, 10-RF transceiver circuit, 11-RF transceiver, 12-transmitter module, 121-balun, 122-surface acoustic wave filter, 123-power amplifier, 124-low-pass filter, 13-receiver module, 131-second low-noise amplifier unit, 132-third low-noise amplifier unit, 133-balun, 134-surface acoustic wave filter, 20-switch circuit, 21-first switch module, 211-first switch unit, 212-second switch unit, 22-second switch module, 23-third switch module, 24-fourth switch module, 241-third switch unit, 242-fourth switch unit, 25-fifth switch module, 26-sixth switch module, 261-fifth switch unit, 262-sixth switch unit, 27-seventh switch module, 30-processing circuit, 40-first low-noise amplification unit, 51-first receiving circuit, 52-second receiving circuit, 53-third receiving circuit, 1001-first area, 1002-second area, 1011-speaker, 1012-volume key, 1013-power key, 1014-power supply.

DETAILED DESCRIPTION

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first antenna may be referred to as a second antenna, and similarly, a second antenna may be referred to as a first antenna. Both the first antenna and the second antenna are antennas, but they are not the same antenna.

It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

It is understood that "at least one" means one or more, and "plurality" means two or more. "At least part of an element" means part or all of an element. When used herein, the singular forms "one", "an" and "said/the" may also include plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "include/comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof. At the same time, the term "and/or" used in this specification includes any and all combinations of the relevant listed items.

Generally, in remote mountainous areas or offshore operations, navigation and other scenarios, the satellite signal is very weak, so the antenna is generally built on the top of the mobile phone, which will not be touched when the user holds it, and has little impact on the performance of the antenna. In the related art, the communication device is only equipped with one antenna for satellite communication, and does not support the ASDIV (antenna main diversity switching) switching mode. Therefore, when using it, the user can only make satellite calls in the speaker mode. When the outside environment is noisy, it greatly affects the user's call quality. At the same time, the privacy of the speaker call is poor, and the user experience is poor. The reasons why the communication device does not support the handset mode mainly include: 1. In the handset mode, when the human body is close to the communication device, the wireless certification has strict requirements for the head SAR (Specific Absorption Rate), and generally the risk of SAR is avoided by backing off the power; 2. In the handset mode, the antenna is contacted by the human body, resulting in a large decrease in antenna performance, resulting in dropped calls or signal deterioration. Therefore, the communication device generally supports a fixed handheld mode. If the external environment is noisy, the quality of the hands-free satellite call is poor, affecting the user experience.

In this regard, the present application provides a communication device and an antenna switching method, which can support satellite communications in earpiece mode and speaker mode, thereby improving the satellite communication performance of the communication device.

The present application provides a communication device 1. As shown in FIG1 , the communication device 1 may be a device having a wireless communication function. For example, the communication device 1 may be a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing device connected to a wireless modem, as well as various forms of user equipment (UE) (e.g., a mobile phone), a mobile station (MS), and the like.

In one embodiment, as shown in FIG2 , a communication device 1 is provided, which includes a radio frequency transceiver circuit 10, a switch circuit 20 and a processing circuit 30. The radio frequency transceiver circuit 10 is used to support the transceiver processing of satellite signals. The switch circuit 20 is respectively connected to the radio frequency transceiver circuit 10 and at least two antennas ANT. The switch circuit 20 is used to select a path between any antenna ANT and the radio frequency transceiver circuit 10. Each antenna ANT is located at a different position of the communication device 1. The number of antennas ANT can be 2, 3 or other suitable values, which can be set according to the satellite communication requirements and is not limited here.

The processing circuit 30 is connected to the switch circuit 20. The processing circuit 30 is used to determine the target antenna from at least two antennas ANT according to the audio output mode of the communication device 1, and control the conduction state of the switch circuit 20 to support the reception and transmission of satellite signals through the target antenna. Among them, the audio output mode includes a handset mode or a speaker mode. The communication device 1 meets the specific absorption rate requirements in the handset mode. At least one antenna ANT supports the reception and transmission of satellite signals in the handset mode, and at least another antenna ANT supports the reception and transmission of satellite signals in the speaker mode. The handset mode and the speaker mode are two different output modes of the communication device 1 when playing audio. In the handset mode, the sound is output through the handset of the communication device 1, and the audio is relatively small. In the speaker mode, the sound is played through the speaker of the communication device 1, and the audio is relatively loud.

The above-mentioned communication device 1 determines the target antenna from at least two antennas ANT according to the audio output mode through the processing circuit 30, and controls the conduction state of the switch circuit 20, so that the switch circuit 20 selects to conduct the path between the target antenna and the RF transceiver circuit 10, so that different antennas ANT support the transmission and reception of satellite signals in the handset mode and the speaker mode, and realizes that the communication device 1 supports satellite communication in the handset mode and the speaker mode. Among them, by arranging at least two antennas ANT at different positions of the communication device 1, the communication device 1 reduces the influence of the human head on the performance of the antenna supporting the handset mode in the handset mode, which can meet the SAR requirements, thereby meeting the satellite communication needs in the handset mode, and is suitable for application scenarios of handset calls such as quiet, private, and public places, and by arranging at least two antennas ANT at different positions of the communication device 1, the communication device 1 reduces the influence of handholding on the performance of the antenna supporting the speaker mode in the speaker mode, which can meet the satellite communication requirements, thereby meeting the satellite communication needs in the speaker mode, and is suitable for application scenarios of speaker playback such as audio sharing, gatherings, and outdoors, thereby improving the satellite communication performance of the communication device 1.

In one embodiment, as shown in Figures 1 to 3, the communication device 1 includes at least a first antenna ANT1 and a second antenna ANT2, and the communication device 1 also includes a first low noise amplifier unit 40. The switch circuit 20 is connected to the first antenna ANT1, the second antenna ANT2, and the first low noise amplifier unit 40 respectively.

The first antenna ANT1 supports the reception and transmission of satellite signals in the handset mode. The second antenna ANT2 is connected to the switch circuit 20, and the second antenna ANT2 supports the reception and transmission of satellite signals in the speaker mode. The first low-noise amplification unit 40 supports low-noise amplification processing of satellite signals. The RF transceiver circuit 10 includes at least a second low-noise amplification unit 131. The second low-noise amplification unit 131 supports low-noise amplification processing of satellite signals. Among them, the first low-noise amplification unit 40 is arranged on the path between the RF transceiver circuit 10 and the first antenna ANT1. Specifically, the first low-noise amplification unit 40 is arranged on the path between the second low-noise amplification unit 131 and the first antenna ANT1.

The first antenna ANT1 is located at the side of the communication device 1, and the second antenna ANT2 is located at the top of the communication device 2. The first low-noise amplification unit 40 is arranged near the first antenna ANT1, and the second low-noise amplification unit 131 is arranged near the second antenna ANT2. Exemplarily, as shown in FIG1 , the first antenna ANT1 is arranged near the left side of the communication device 1, and the first low-noise amplification unit 40 is arranged at the first area 1001 of the left side of the communication device 1 near the first antenna ANT1; the second antenna ANT2 is arranged near the top of the communication device 1, and the second low-noise amplification unit 131 is arranged at the top of the communication device 1 near

The second area 1002 of the second antenna ANT2. In this way, when the communication device 1 supports satellite communication in the handset mode based on the first antenna ANT1, it can meet the requirements of the wireless certification for head SAR, and can also reduce the impact of the human head on the performance of the first antenna ANT1, thereby improving the satellite communication performance of the communication device 1; and when the communication device 1 supports satellite communication in the speaker mode based on the second antenna ANT2, the second antenna ANT2 is located at the top of the communication device 1 and will not be blocked by the human body, thereby ensuring the satellite communication performance in the speaker mode.

The processing circuit 30 is also used to select and control the first low noise amplifier unit 40 to perform low noise amplification processing on the satellite signal received by the first antenna ANT1 in the handset mode. The processing circuit 30 is also used to select and control the second low noise amplifier unit 131 to perform low noise amplification processing on the satellite signal received by the second antenna ANT2 in the speaker mode.

The above-mentioned communication device 1 controls the first low-noise amplifying unit 40 to perform low-noise amplification processing on the satellite signal received by the first antenna ANT1 in the handset mode through the processing circuit 30, and controls the second low-noise amplifying unit 131 to perform low-noise amplification processing on the satellite signal received by the second antenna ANT2 in the speaker mode, so as to support the reception processing of the satellite signal in the handset mode and the speaker mode. Since the first low-noise amplifying unit 40 is arranged close to the first antenna ANT1, in the handset mode, the path insertion loss of the satellite signal in the receiving path formed by the first antenna ANT1 and the first low-noise amplifying unit 40 can be reduced, and the second low-noise amplifying unit 131 is arranged close to the second antenna ANT2, so that in the speaker mode, the path insertion loss of the satellite signal in the receiving path formed by the second antenna ANT2 and the second low-noise amplifying unit 131 can be reduced, so that the reception sensitivity of the communication device 1 to the satellite signal in the handset mode and the speaker mode is equivalent, thereby ensuring the reception performance of the communication device 1 to the satellite signal in different modes.

Please continue to refer to FIG. 3. In one embodiment, the gain coefficients of the first low-noise amplifying unit 40 and the second low-noise amplifying unit 131 are the same. For example, the gain coefficients of the first low-noise amplifying unit 40 and the second low-noise amplifying unit 131 are both 14.8 dB, 19.8 dB or other suitable values, which can be set accordingly according to the reception requirements of the communication device 1 for satellite signals, and are not specifically limited here. In this way, the low-noise amplifying processing performance of the first low-noise amplifying unit 40 and the second low-noise amplifying unit 131 for satellite signals is consistent, so that the performance of the low-noise amplifying processing of satellite signals by the corresponding low-noise amplifying unit of the communication device 1 in different modes is equivalent, and the low-noise amplifying unit is set close to the corresponding antenna, so that the receiving performance of the communication device 1 in different modes can be kept consistent, avoiding the influence of the receiving sensitivity of the satellite signal due to different antenna positions in different modes, which helps to improve the satellite communication performance of the communication device 1.

Please continue to refer to FIG. 3. In one embodiment, the processing circuit 30 is also used to control the switch circuit 20 to turn on the branch of the first low-noise amplifying unit 40 for low-noise amplification of the satellite signal received by the first antenna ANT1 in the handset mode, and to control the first low-noise amplifying unit 40 to be in an amplification state and the second low-noise amplifying unit 131 to be in a bypass state. Based on the above, the second low-noise amplifying unit 131 is located on the branch between the first low-noise amplifying unit 40 and the first antenna ANT1. Therefore, in the handset mode, the communication device 1 performs low-noise amplification on the satellite signal received by the first antenna ANT1 through the first low-noise amplifying unit 40, and the second low-noise amplifying unit 131 transmits the satellite signal but does not perform low-noise amplification, thereby supporting the reception and processing of the satellite signal in the handset mode.

The processing circuit 30 is also used to control the switch circuit 20 to turn on the branch of the second low-noise amplifying unit 131 to perform low-noise amplification processing on the satellite signal received by the second antenna ANT2 in the speaker mode, and to control the first low-noise amplifying unit 40 to be in the bypass state and the second low-noise amplifying unit 131 to be in the amplification state. That is, in the speaker mode, the communication device 1 performs low-noise amplification processing on the satellite signal received by the second antenna ANT2 through the second low-noise amplifying unit 131, thereby supporting the reception processing of the satellite signal in the speaker mode.

The low noise amplifier unit is in working state, which means that the low noise amplifier unit performs low noise amplification processing on the satellite signal. The low noise amplifier unit is in bypass state, which means that the low noise amplifier unit transmits the satellite signal but does not perform low noise amplification processing. In the bypass state, the low noise amplifier unit is equivalent to a wire for transmitting the satellite signal. The low noise amplifier unit here includes a first low noise amplifier unit 40 and a second low noise amplifier unit 131.

In the handset mode, the communication device 1 controls the switch circuit 20 through the processing circuit 30 to turn on the branch of the first low-noise amplifying unit 40 to perform low-noise amplification processing on the satellite signal received by the first antenna ANT1, and controls the first low-noise amplifying unit 40 to be in an amplifying state and the second low-noise amplifying unit 131 to be in a bypass state, so that the first low-noise amplifying unit 40 can support the low-noise amplification processing of the first antenna ANT1; in addition, in the speaker mode, the communication device 1 controls the switch circuit 20 through the processing circuit 30 to turn on the second low-noise amplifying unit 131 to perform low-noise amplification processing on the satellite signal received by the second antenna ANT2. The branch for noise amplification processing, and controlling the first low-noise amplification unit 40 to be in a bypass state and the second low-noise amplification unit 131 to be in an amplification state, can support the low-noise amplification processing of the second antenna ANT2 through the second low-noise amplification unit 131, realize the switching of the low-noise amplification unit in different audio output modes, and switch to a low-noise amplification unit close to the antenna that supports sending and receiving satellite signals in different audio output modes, thereby reducing the insertion loss of the receiving path of the satellite signal, so that the communication device 1 can have consistent receiving performance in different audio output modes, and improve the stability and reliability of the satellite communication of the communication device 1.

In one embodiment, please continue to refer to FIG. 3 , the RF transceiver circuit 10 also includes a third low-noise amplifying unit 132. The third low-noise amplifying unit 132 is connected to the second low-noise amplifying unit 131. The third low-noise amplifying unit 132 is located on the receiving path of the satellite signal. The third low-noise amplifying unit 132 is used to support low-noise amplification processing of the satellite signal. The gain of the third low-noise amplifying unit 132 may be the same as or different from that of the first low-noise amplifying unit 40 and the second low-noise amplifying unit 131. For example, the gain of the first low-noise amplifying unit 40 and the second low-noise amplifying unit 131 are both 19.8 dB, and the gain of the third low-noise amplifying unit 132 is 14.8 dB. In actual applications, the gains of the three low-noise amplifying units can be set separately according to the receiving requirements of the communication device 1, which is only an exemplary description and does not constitute a specific limitation.

Exemplarily, the processing circuit 30 is also connected to the third low-noise amplifying unit 132. The processing circuit 30 is also used to select and control the third low-noise amplifying unit 132 to perform low-noise amplification processing on the satellite signal in the handset mode and the speaker mode. Exemplarily, the processing circuit 30 is also used to control the third low-noise amplifying unit 132 to be in an amplifying state in the handset mode and the speaker mode. In application, in the handset mode, the communication device 1 performs low-noise amplification processing on the satellite signal received by the first antenna ANT1 through the first low-noise amplifying unit 40 and the third low-noise amplifying unit 132 respectively; in the speaker mode, the communication device 1 performs low-noise amplification processing on the satellite signal received by the second antenna ANT2 through the second low-noise amplifying unit 131 and the third low-noise amplifying unit 132 respectively.

When the above-mentioned communication device 1 is in the handset mode, the third low-noise amplifying unit 132 and the first low-noise amplifying unit 40 respectively perform low-noise amplification processing on the satellite signal received by the first antenna ANT1, thereby realizing multi-stage low-noise amplification processing of the satellite signal; when the communication device 1 is in the speaker mode, the third low-noise amplifying unit 132 and the second low-noise amplifying unit 131 respectively perform low-noise amplification processing on the satellite signal received by the second antenna ANT2, thereby realizing multi-stage low-noise amplification processing of the satellite signal to meet the communication device 1's demand for receiving satellite signals.

It should be noted that in actual applications, at least one of the first low-noise amplifying unit 40, the second low-noise amplifying unit 131 and the third low-noise amplifying unit 132 can be flexibly selected to support the reception and processing of satellite signals according to satellite communication requirements, and no limitation is made here.

In one embodiment, the target low noise amplifying unit includes at least one of the first low noise amplifying unit 40, the second low noise amplifying unit 131 and the third low noise amplifying unit 132. The target low noise amplifying unit includes a low noise amplifier (LNA) and a bypass switch connected in parallel.

The processing circuit 30 is also connected to the bypass switch. The processing circuit 30 is also used to control the conduction state of the bypass switch to control the working state of the target low-noise amplifier unit. When the bypass switch is in the conduction state, the target low-noise amplifier unit works in the bypass state. In this case, the bypass switch shorts the low-noise amplifier, and the target low-noise amplifier unit is equivalent to a wire, which supports the transmission of satellite signals but does not support low-noise amplification processing of satellite signals. When the bypass switch is in the disconnected state, the target low-noise amplifier unit works in the amplification state. In this case, the target low-noise amplifier unit supports low-noise amplification processing of satellite signals through the low-noise amplifier.

Exemplarily, the processing circuit 30 can control the conduction state of the bypass switch through a GPIO (General Purpose Input/Output) signal. For example, when the GPIO signal is in a high level state, the bypass switch is controlled to be in an off state, so that the target low-noise amplifier unit is in an amplifying state; when the GPIO signal is in a low level state, the bypass switch is controlled to be in an on state, so that the target low-noise amplifier unit is in a bypass state. In application, the bypass switch can also be controlled to be in an off state when the GPIO signal is in a low level state, and to be in an on state when the GPIO signal is in a high level state, which is not limited here.

Exemplarily, when the target low-noise amplifying unit includes a first low-noise amplifying unit 40, a second low-noise amplifying unit 131, and a third low-noise amplifying unit 132, the first low-noise amplifying unit 40 includes a first low-noise amplifier and a first bypass switch, the second low-noise amplifying unit 131 includes a second low-noise amplifier and a second bypass switch, the third low-noise amplifying unit 132 includes a third low-noise amplifier and a third bypass switch, the processing circuit 30 is connected to the first bypass switch, the second bypass switch, and the third bypass switch, respectively, and the processing circuit 30 controls the conduction state of the first bypass switch through the GPIO1 signal, controls the conduction state of the second bypass switch through GPIO2, and controls the conduction state of the third bypass switch through GPIO3. In the application, the truth table of the GPIO signal of the communication device 1 in the handset mode and the speaker mode is shown in Table 1, where "1" indicates that the bypass switch is in the off state, and "0" indicates that the bypass switch is in the on state.

Table 1 GPIO signal truth table corresponding to earpiece mode and speaker mode

In the above-mentioned communication device 1, the target low-noise amplification unit includes a low-noise amplifier and a bypass switch connected in parallel, and the conduction state of the bypass switch is controlled by the processing circuit 30 to select the short-circuited low-noise amplifier through the bypass switch, thereby realizing the control of the working state of the target low-noise amplifier, that is, by switching the conduction state of the bypass switch, the switching of the target low-noise amplifier between the amplification state and the bypass state is realized, thereby supporting the switching of the working state of the target low-noise amplification unit in different modes.

In one embodiment, please continue to refer to FIG. 3, the switch circuit 20 includes a first switch module 21 and a second switch module 22. The first switch module 21 is connected to the first low-noise amplifying unit 40, the second low-noise amplifying unit 131, the second switch module 22, and the second antenna ANT2, respectively. The first switch module 21 is used to select and conduct the paths between the first low-noise amplifying unit 40, the second switch module 22, the second antenna ANT2, and the second low-noise amplifying unit 131, respectively. Exemplarily, the first switch module 21 includes at least one of a single-pole multi-throw (SPnT) switch and a multi-pole multi-throw (nPnT) switch. For example, the second switch module 22 is a DP4T. The type of the first switch module 21 can be set according to the requirements, and is not specifically limited here.

The second switch module 22 is connected to the first low-noise amplifier unit 40 and the first antenna ANT1 respectively. The second switch module 22 is used to select and conduct the paths between the first low-noise amplifier unit 40, the first switch module 21 and the first antenna ANT1 respectively. Exemplarily, the second switch module 22 includes a single-pole multiple-throw (SPnT) switch, for example, the second switch module 22 is SP4T, and the type of the second switch module 22 can be set according to the needs, which is not specifically limited here.

The processing circuit 30 is used to control the conduction state of the first switch module 21 and the second switch module 22 in the handset mode to support the reception and transmission of satellite signals through the first antenna ANT1. In the application, when the communication device 1 is in the handset mode, the processing circuit 30 can control the conduction state of the first switch module 21 and the second switch module 22, so that the first switch module 21 conducts the path between the first low-noise amplification unit 40 and the second low-noise amplification unit 131, the first switch module 21 disconnects the path between the second antenna ANT2 and the second low-noise amplification unit 131, and the second switch module 22 conducts the path between the first antenna ANT1 and the first low-noise amplification unit 40, so as to support the reception of satellite signals through the first antenna ANT1. That is, in the handset mode, the receiving path of the satellite signal includes the second antenna ANT2, the first switch module 21 and the second low-noise amplification module.

The processing circuit 30 is also used to control the conduction state of the first switch module 21 and the second switch module 22 in the speaker mode to support the reception and transmission of satellite signals through the second antenna ANT2. In the application, when the communication device 1 is in the speaker mode, the processing circuit 30 can control the conduction state of the first switch module 21 and the second switch module 22, so that the first switch module 21 conducts the path between the second antenna ANT2 and the second low-noise amplifier unit 131, and the second switch module 22 disconnects the path between the first antenna ANT1 and the first low-noise amplifier unit 40, so as to support the reception of satellite signals through the second antenna ANT2. That is, in the speaker mode, the receiving path of the satellite signal includes the first antenna ANT1, the second switch module 22, the first low-noise amplifier unit 40, the first switch module 21 and the second low-noise amplifier module.

In the handset mode, the communication device 1 controls the conduction state of the first switch module 21 and the second switch module 22 through the processing circuit 30, thereby supporting the reception of satellite signals through the first antenna ANT1; and, in the speaker mode, the communication device 1 controls the conduction state of the first switch module 21 and the second switch module 22 through the processing circuit 30, thereby supporting the reception of satellite signals through the second antenna ANT2, realizing the reception switching between different antennas, and then supporting the reception of satellite signals in the handset mode and the speaker mode through different antennas, expanding the satellite communication mode of the communication device 1, and improving the satellite communication performance of the communication device 1.

In one embodiment, please continue to refer to FIG. 3, the RF transceiver circuit 10 includes a RF transceiver 11, a transmitting module 12 and a receiving module 13. The RF transceiver 11 is used to support the transceiver processing of satellite signals. Among them, the transmitting module 12 is connected to the RF transceiver 11 and the first switch module 21 respectively. The transmitting module 12 is used to support the transmission processing of satellite signals. Exemplarily, the transmitting module 12 includes at least one of a balun (Balance-unbalance, Balun) 121, a surface acoustic wave filter (SurfaceAcoustic Wave Filter, SAW) 122, a power amplifier (Power Amplifier, PA) 123 and a low pass filter (Low Pass Filter, LPF) 124. The receiving module 13 includes at least a first low noise amplification unit 40. Exemplarily, the receiving module 13 also includes at least one of a third low noise amplification unit 132, a balun 133, and a surface acoustic wave filter 134.

In the application, when the communication device 1 is in the handset mode, the processing circuit 30 can control the conduction state of the first switch module 21 and the second switch module 22, so that the first switch module 21 conducts the path between the transmitting module 12 and the second switch module 22, and the first switch module 21 disconnects the path between the transmitting module 12 and the second antenna ANT2, and the second switch module 22 conducts the path between the first antenna ANT1 and the first switch module 21, so as to support the transmission of satellite signals through the first antenna ANT1. In the handset mode, the transmission path of the satellite signal includes the RF transceiver 11, the transmitting module 12, the first switch module 21, the second switch module 22 and the first antenna ANT1.

When the communication device 1 is in speaker mode, the processing circuit 30 can control the conduction state of the first switch module 21 and the second switch module 22, so that the first switch module 21 disconnects the path between the transmitting module 12 and the second switch module 22, and the first switch module 21 conducts the path between the transmitting module 12 and the second antenna ANT2, so as to support the transmission of satellite signals through the second antenna ANT2. In the handset mode, the transmission path of the satellite signal includes the RF transceiver 11, the transmitting module 12, the first switch module 21 and the second antenna ANT2.

The above-mentioned communication device 1 supports the receiving and sending processing of satellite signals through the radio frequency transceiver 11, and supports the sending and sending processing of satellite signals through the sending module 12. In the handset mode, the communication device 1 controls the conduction state of the first switch module 21 and the second switch module 22 through the processing circuit 30, thereby supporting the sending of satellite signals through the first antenna ANT1; in the speaker mode, the communication device 1 controls the conduction state of the first switch module 21 and the second switch module 22 through the processing circuit 30, thereby supporting the sending of satellite signals through the second antenna ANT2, realizing the sending switching between different antennas, and then supporting the sending of satellite signals in the handset mode and the speaker mode through different antennas, expanding the satellite communication mode of the communication device 1, and improving the satellite communication performance of the communication device 1.

In one embodiment, as shown in FIG4 , the first switch module 21 includes a first switch unit 211 and a second switch unit 212. The first switch unit 211 is respectively connected to the second low-noise amplifying unit 131, the second switch unit 212, and the processing circuit 30. The first switch unit 211 is used to select and conduct the path between the second low-noise amplifying unit 131 and the second switch unit 212 under the control of the processing circuit 30. For example, when the RF transceiver circuit 10 also includes an RF transceiver 11 and a transmitting module 12, the first switch unit 211 is also connected to the transmitting module 12. The first switch unit 211 is used to select and conduct the path between the second low-noise amplifying unit 131, the transmitting module 12, and the second switch unit 212, respectively. The second low-noise amplifying unit 131 is connected to the RF transceiver 11

The second switch unit 212 is respectively connected to the first low noise amplifying unit 40, the second switch module 22, the second antenna ANT2, and the processing circuit 30. The fourth switch unit 214 is used to select and conduct the paths between the first low noise amplifying unit 40, the second switch module 22, the second antenna ANT2 and the first switch unit 211 under the control of the processing circuit 30.

In the application, when the communication device 1 is in the handset mode, the processing circuit 30 can control the conduction states of the first switch unit 211, the second switch unit 212, and the second switch module 22 respectively, so as to support the reception and transmission of satellite signals through the first antenna ANT1. In the handset mode, the receiving path of the satellite signal at least includes the first antenna ANT1, the second switch module 22, the first low-noise amplifier unit 40, the second switch unit 212, the first switch unit 211, the second low-noise amplifier unit 131, and the RF transceiver 11, and the transmitting path of the satellite signal includes the RF transceiver 11, the transmitting module 12, the first switch unit 211, the second switch unit 212, the second switch module 22, and the first antenna ANT1.

When the communication device 1 is in speaker mode, the processing circuit 30 can control the conduction states of the first switch unit 211, the second switch unit 212, and the second switch module 22 respectively to support the reception and transmission of satellite signals through the second antenna ANT2. In speaker mode, the receiving path of the satellite signal includes the second antenna ANT2, the second switch unit 212, the first switch unit 211, the second low-noise amplifier unit 131, and the RF transceiver 11, and the transmitting path of the satellite signal includes the RF transceiver 11, the transmitting module 12, the first switch unit 211, the second switch unit 212, and the second antenna ANT2.

The communication device 1 controls the conduction states of the first switch unit 211, the second switch unit 212, and the second switch module 22 respectively through the processing circuit 30, thereby realizing the switching between the first antenna ANT1 and the second antenna ANT2 in different audio output modes, and also realizing the switching of the transmission and reception of satellite signals by the same antenna. In practical applications, the structure shown in FIG. 3 or FIG. 4 can be flexibly selected to set the first switch module 21 according to the needs. For example, in a scenario where the device area is small, the implementation shown in FIG. 3 can be adopted to set the first switch module 21 to a DP4T switch to improve the integration of the device. This is only an exemplary description and is not too limited.

In one embodiment, please continue to refer to Figures 3 and 4, the communication device 1 also includes a first receiving circuit 51. The first receiving circuit 51 is connected to the second switch module 22. The first receiving circuit 51 is used to support the reception and processing of the radio frequency signal. Among them, the communication format of the radio frequency signal is different from that of the satellite signal. The communication format of the satellite signal is a satellite communication format. Exemplarily, the radio frequency signal communication format includes at least one of a mobile cellular communication format, a Bluetooth communication format, and a wireless network communication format. The frequency band of the radio frequency signal is different from that of the satellite signal. The frequency band of the radio frequency signal can be set accordingly according to the communication requirements of the communication device 1. For example, the communication device 1 of the radio frequency signal is a mobile cellular communication, and the frequency band of the radio frequency signal can include at least one of a low frequency band (LB) and a medium and high frequency band (MHB), which is not limited here.

The processing circuit 30 is also used to control the conduction state of the second switch module 22 so that the first antenna ANT1 supports the transmission and reception of radio frequency signals. Exemplarily, when the second switch module 22 conducts the first antenna ANT1 and the first receiving circuit 51, the first antenna ANT1 can be used as a diversity receiving antenna (DRX) for radio frequency signals. The specific purpose of the first antenna ANT1 can be set accordingly according to the needs of the communication device 1, which is only an exemplary description here and is not too limited.

The above-mentioned communication device 1 also supports the reception and transmission of radio frequency signals through the first receiving circuit 51, and controls the conduction state of the second switch module 22 through the processing circuit 30, and can support the reception and transmission of radio frequency signals through the first antenna ANT1, thereby realizing the multiplexing of radio frequency signals and satellite signals on the first antenna ANT1, that is, realizing the multiplexing of the first antenna ANT1 by different communication standards, thereby improving the integration of the device and reducing the cost and the area occupied by the device.

In one embodiment, as shown in Fig. 5, the RF transceiver circuit 10 includes a RF transceiver 11, a transmitting module 12 and a receiving module 13. The RF transceiver 11, the transmitting module 12 and the receiving module 13 are similar to the structures shown in Fig. 3, and the details can be referred to the above related contents, which will not be repeated here.

The switch circuit 20 includes a third switch module 23, a fourth switch module 24 and a fifth switch module 25. The third switch module 23 is connected to the RF transceiver 11, the first low-noise amplifying unit 40, the second low-noise amplifying unit 131 and the processing circuit 30 respectively. The third switch module 23 is used to select and conduct the paths between the first low-noise amplifying unit 40, the second low-noise amplifying unit 131 and the RF transceiver 11 respectively under the control of the processing circuit 30. Exemplarily, the third switch module 23 includes an SPnT switch, for example, the third switch module 23 is an SP2T switch, and the third switch module 23 can also be other types of switch devices, which are not specifically limited here.

The fourth switch module 24 is respectively connected to the transmitting module 12, the second low-noise amplifying unit 131, the fifth switch module 25, the second antenna ANT2, and the processing circuit 30. The fourth switch module 24 is used to select and conduct the paths between the fifth switch module 25, the second antenna ANT2 and the transmitting module 12, respectively, and select and conduct the paths between the fifth switch module 25, the second antenna ANT2 and the second low-noise amplifying unit 131, respectively, under the control of the processing circuit 30. Exemplarily, the fourth switch module 24 includes at least one of a SPnT switch and an nPnT, for example, the fourth switch module 24 is a DPDT switch, and the fourth switch module 24 can also be other types of switch devices, which are not specifically limited here.

The fifth switch module 25 is respectively connected to the fourth switch module 24, the first low-noise amplifying unit 40, the first antenna ANT1, and the processing circuit 30. The second switch module 24 is used to select and conduct the paths between the fourth switch module 24, the first low-noise amplifying unit 40, and the first antenna ANT1, respectively, under the control of the processing circuit 30. Exemplarily, the fifth switch module 25 includes at least one of an SPnT switch and an nPnT. For example, the fifth switch module 25 is an SP4T switch. The fifth switch module 25 can also be other types of switch devices, which are not specifically limited here.

In the application, when the communication device 1 is in the handset mode, the processing circuit 30 can control the conduction states of the third switch module 23, the fourth switch module 24 and the fifth switch module 25 respectively to support the reception and transmission of satellite signals through the first antenna ANT1. In the handset mode, the receiving path of the satellite signal includes the first antenna ANT1, the fifth switch module 25, the first low-noise amplifier unit 40, the third switch module 23 and the RF transceiver 11, and the transmitting path of the satellite signal includes the RF transceiver 11, the transmitting module 12, the fourth switch module 24, the fifth switch module 25 and the first antenna ANT1.

When the communication device 1 is in speaker mode, the processing circuit 30 can control the conduction states of the third switch module 23, the fourth switch module 24, and the fifth switch module 25 respectively to support the reception and transmission of satellite signals through the second antenna ANT2. In speaker mode, the receiving path of the satellite signal includes the second antenna ANT2, the fourth switch module 24, the second low-noise amplifier unit 131, the third switch module 23, and the RF transceiver 11, and the transmitting path of the satellite signal includes the RF transceiver 11, the transmitting module 12, the fourth switch module 24, and the second antenna ANT2.

The above-mentioned communication device 1 controls the conduction states of the third switch module 23, the fourth switch module 24 and the fifth switch module 25 respectively through the processing circuit 30, thereby realizing the switching between the first antenna ANT1 and the second antenna ANT2 in different audio output modes, and also realizing the switching of the same antenna for the transmission and reception of satellite signals.

In one embodiment, as shown in FIG6 , the fourth switch module 24 includes a third switch unit 241 and a fourth switch unit 242. The third switch unit 241 is respectively connected to the transmitting module 12, the fifth switch module 25, the fourth switch unit 242, and the processing circuit 30. The third switch unit 241 is used to select and conduct the paths between the fifth switch module 25 and the fourth switch unit 242 and the transmitting module 12 under the control of the processing circuit 30. Exemplarily, the third switch unit 241 includes SPnT, for example, the third switch unit 241 is SP2T.

The fourth switch unit 242 is respectively connected to the second low-noise amplifying unit 131, the second antenna ANT2, and the processing circuit 30. The fourth switch unit 242 is used to select and conduct the paths between the third switch unit 241, the second low-noise amplifying unit 131, and the second antenna ANT2, respectively, under the control of the processing circuit 30. Exemplarily, the fourth switch unit 242 includes SPnT, for example, the fourth switch unit 242 is SP2T.

In the application, when the communication device 1 is in the handset mode, the processing circuit 30 can control the conduction states of the third switch module 23, the third switch unit 241, the fourth switch unit 242 and the fifth switch module 25 respectively to support the reception and transmission of satellite signals through the first antenna ANT1. In the handset mode, the receiving path of the satellite signal includes the first antenna ANT1, the fifth switch module 25, the first low-noise amplifier unit 40, the third switch module 23 and the RF transceiver 11, and the transmitting path of the satellite signal includes the RF transceiver 11, the transmitting module 12, the third switch unit 241, the fifth switch module 25 and the first antenna ANT1.

When the communication device 1 is in speaker mode, the processing circuit 30 can control the conduction states of the third switch module 23, the third switch unit 241, the fourth switch unit 242 and the fifth switch module 25 respectively to support the reception and transmission of satellite signals through the second antenna ANT2. In speaker mode, the receiving path of the satellite signal includes the second antenna ANT2, the fourth switch unit 242, the second low-noise amplifier unit 131, the third switch module 23 and the RF transceiver 11, and the transmitting path of the satellite signal includes the RF transceiver 11, the transmitting module 12, the third switch unit 241, the fourth switch unit 242 and the second antenna ANT2.

The communication device 1 controls the conduction states of the third switch module 23, the third switch unit 241, the fourth switch unit 242 and the fifth switch module 25 respectively through the processing circuit 30, realizes the switching between the first antenna ANT1 and the second antenna ANT2 in different audio output modes, and also realizes the switching of the transmission and reception of satellite signals by the same antenna. In addition, when the communication device 1 is in the speaker mode, FIG6 has fewer switch devices on the transmission path of the satellite signal compared with the structure shown in FIG3, and the insertion loss of the transmission link is lower, which further improves the transmission performance of the communication device 1 for satellite signals. It should be noted that in actual applications, the structure shown in FIG5 or FIG6 can be flexibly selected to set the fourth switch module 24 according to the needs. For example, in a scenario where the device area is small, the fourth switch module 24 can be set as a DPDT switch in the manner shown in FIG5 to improve the integration of the device. This is only an exemplary description and is not too limited.

In one embodiment, please continue to refer to Figures 5 and 6, the communication device 1 also includes a second receiving circuit 52. The second receiving circuit 52 is connected to the fifth switch module 25. The second receiving circuit 52 is used to support the reception and processing of radio frequency signals. The second receiving circuit 52 is similar to the aforementioned first receiving circuit 51 and is not described in detail here. The processing circuit 30 is also used to control the conduction state of the fifth switch module 25 so that the first antenna ANT1 supports the transmission and reception of radio frequency signals. Exemplarily, when the fifth switch module 25 conducts the first antenna ANT1 and the second receiving circuit 52, the first antenna ANT1 can be used as a diversity receiving antenna (DRX) for radio frequency signals. The specific purpose of the first antenna ANT1 can be set accordingly according to the needs of the communication device 1. This is only an exemplary description and is not overly limited.

The above-mentioned communication device 1 also supports the reception and transmission of radio frequency signals through the second receiving circuit 52, and controls the conduction state of the fifth switch module 25 through the processing circuit 30, and can support the reception and transmission of radio frequency signals through the first antenna ANT1, thereby realizing the multiplexing of radio frequency signals and satellite signals on the first antenna ANT1, that is, realizing the multiplexing of the first antenna ANT1 by different communication standards, thereby improving the integration of the device and reducing the cost and the area occupied by the device.

In one embodiment, as shown in FIG7 , the communication device 1 includes a radio frequency transceiver circuit 10, a switch circuit 20, a processing circuit 30, a first antenna ANT1, and a second antenna ANT2. The first antenna ANT1 and the second antenna ANT2 are respectively connected to the switch circuit 20. The first antenna ANT1 and the second antenna ANT2 are the same as those in the above-mentioned embodiment, and the details can be referred to the above-mentioned related description, which will not be repeated here.

The switch circuit 20 includes a sixth switch module 26 and a seventh switch module 27. The sixth switch module 26 is connected to the RF transceiver circuit 10, the seventh switch module 27, the second antenna ANT2, and the processing circuit 30, respectively. The sixth switch module 26 is used to select and conduct the paths between the seventh switch module 27, the second antenna ANT2, and the RF transceiver circuit 10, respectively, under the control of the processing circuit 30. The seventh switch module 27 is connected to the first antenna ANT1 and the processing circuit 30, respectively. Exemplarily, the sixth switch module 26 includes at least one of a SPnT switch and an nPnT switch. For example, the sixth switch module 26 is a DPDT switch. Specifically, a suitable type can be set according to actual needs, which is not limited here.

The seventh switch module 27 is used to select and conduct the path between the sixth switch module 26 and the first antenna ANT1 under the control of the processing circuit 30. Exemplarily, the seventh switch module 27 includes an SPnT switch, for example, the seventh switch module 27 is an SP4T switch, and a suitable type can be set according to actual needs, which is not limited here.

The above-mentioned communication device 1 controls the conduction state of the sixth switch module 26 and the seventh switch module 27 through the processing circuit 30, and can support the transmission and reception of satellite signals through the first antenna ANT1 in the handset mode, and the transmission and reception of satellite signals through the second antenna ANT2 in the speaker mode, thereby realizing that the communication device 1 supports the satellite communication function in the handset mode and the speaker mode through different antennas, expands the satellite communication mode of the communication device 1, improves the satellite communication performance of the communication device 1, and realizes the switching of the first antenna ANT1 and the second antenna ANT2 in different audio output modes. Since the first antenna ANT1 and the second antenna ANT2 are arranged at different positions of the communication device 1, the communication device 1 switches different antennas and reasonably designs the positions of the first antenna ANT1 and the second antenna ANT2, so that the communication device 1 can meet the SAR requirements when performing satellite communication in the handset mode, thereby further improving the satellite communication performance of the communication device 1.

In one embodiment, as shown in FIG8 , the sixth switch module 26 includes a fifth switch unit 261 and a sixth switch unit 262. The fifth switch unit 261 is connected to the RF transceiver circuit 10, the sixth switch unit 262, and the processing circuit 30, respectively. The fifth switch unit 261 is used to select the path between the RF transceiver circuit 10 and the sixth switch unit 262 under the control of the processing circuit 30. The sixth switch unit 262 is connected to the fourth switch module, the second antenna ANT2, and the processing circuit 30, respectively. The sixth switch unit 262 is used to select the path between the seventh switch module 27, the second antenna ANT2, and the fifth switch unit 261, respectively, under the control of the processing circuit 30.

The communication device 1 controls the conduction states of the fifth switch unit 261, the sixth switch unit 262 and the seventh switch module 27 through the processing circuit 30, so that the communication device 1 supports the satellite communication function in the handset mode and the speaker mode through different antennas, and also realizes the switching of the first antenna ANT1 and the second antenna ANT2 in different audio output modes, thereby expanding the satellite communication mode of the communication device 1 and improving the satellite communication performance of the communication device 1. In practical applications, the structure shown in FIG. 7 or FIG. 8 can be flexibly selected to set the sixth switch module 26 according to the needs. For example, in a scenario where the device area is small, the implementation shown in FIG. 7 can be adopted to set the sixth switch module 26 as a DPDT switch to improve the integration of the device. This is only an exemplary description and is not too limited.

For example, please continue to refer to Figures 7 and 8, where the RF transceiver circuit 10 may include a RF transceiver 11, a transmitting module 12, and a receiving module 13. In the structure shown in Figure 7, the transmitting module 12 and the receiving module 13 are respectively connected to the sixth switch module 26; in the structure shown in Figure 8, the transmitting module 12 and the receiving module 13 are respectively connected to the fifth switch unit 261. The specific structures and functions of the RF transceiver 11, the transmitting module 12, and the receiving module 13 are similar to those of the aforementioned embodiment, and the details can be referred to the aforementioned related description, which will not be repeated here.

Exemplarily, please continue to refer to Figures 7 and 8. The communication device 1 may also include a third receiving circuit 53, which is connected to the seventh switch module 27. The third receiving circuit 53 is used to support the transceiver processing of the radio frequency signal. The communication format of the radio frequency signal is different from that of the satellite signal. The processing circuit 30 is also used to control the conduction state of the seventh switch module 27 so that the first antenna ANT1 supports the transceiver of the radio frequency signal. The third receiving circuit 53 shown in Figures 7 and 8 is similar to the first receiving circuit 51 provided in the aforementioned embodiment. For details, please refer to the aforementioned related description, which will not be repeated here.

In one embodiment, please continue to refer to FIG. 1 , the communication device 1 may be configured with an earpiece and a speaker (SPK) 1011 to support an earpiece mode and a speaker mode under satellite communication. Exemplarily, the speaker may be disposed at at least one of the top and the bottom of the communication device 1. The communication device 1 may also be configured with a volume key 1012 to support adjusting the volume of the audio signal output by the communication device 1 in different modes. Exemplarily, the volume key 1012 is disposed on the side of the communication device 1, for example, on the left side as shown in FIG. 1 , so as to adjust the volume by touch. The communication device 1 may also be configured with a power supply 1014 and a power key 1013 to start or shut down the communication device 1 through the power key 1013. Exemplarily, the power key 1013 is disposed on the side of the communication device 1, for example, on the left side as shown in FIG. 1 , so as to touch the switch of the communication device 1. Exemplarily, the first antenna ANT1 is disposed close to the volume key 1012 and the power key 1013 to reduce the influence of the human head on the antenna performance in the earpiece mode and meet the SAR requirements. It should be noted that, in actual applications, the communication device 1 can be configured according to requirements, and FIG. 1 is only an exemplary illustration.

For better understanding, the communication device 1 provided in the embodiment of the present application is described in conjunction with Figures 1 to 8. Among them, the communication device 1 includes a radio frequency transceiver circuit 10, a switch circuit 20, a processing circuit 30, a receiving circuit (a first receiving circuit 51 or a second receiving circuit 52), a first antenna ANT1 and a second antenna ANT2. Among them, the radio frequency transceiver circuit 10 includes a radio frequency transceiver 11, a transmitting module 12, and a receiving module 13. The transmitting module 12 includes a balun 121, a surface acoustic wave filter 122, a power amplifier 123 and a low-pass filter 124 connected in series. The receiving module 13 includes a balun 133, a third low-noise amplification unit 132, a surface acoustic wave filter 134 and a second low-noise amplification unit 131 connected in series. The first antenna ANT1 is arranged in the middle of the left side of the communication device 1, the second antenna ANT2 is arranged at the top right of the communication device 1, and the power amplifier 123, the second low-noise amplification unit 131 and the third low-noise amplification unit 132 in the radio frequency transceiver circuit 10 are respectively arranged close to the first antenna ANT1. In combination with the specific structure, the budget of the receiving and transmitting link of the satellite signal is described below by taking the gain of the second low-noise amplifier 131 as 19.8 dB and the gain of the third low-noise amplifier 132 as 14.8 dB as an example.

For the structure shown in FIG8 , the fifth switch unit 261 , the sixth switch unit 262 and the seventh switch module 27 are SP2T switches respectively. The budgets for the transmission link and the reception link of the second antenna ANT2 in the speaker mode are as follows:

(1) RX Sensitivity = -174 + 5dB (C/N) + 10*log (16Khz) + NF = -127 + NF = -127 + 2.2 = -124.8dbm

(2) Noise factor (NF total) ≈ NF1 + NF2 = (trace loss 0.2 + SP4T loss 0.5*2 + LNANF0.6)

+(RX filter Loss+Balun loss+RFIC NF-1)/LNA Gain＝1.8+0.4＝2.2dB

(3) Transmission performance (TX) = 37-loss = 37-1.5 = 35.5 dBm

The calculation formula for receiving sensitivity takes bandwidth 21.6Khz and roll-off coefficient 0.35 as an example, and the actual bandwidth = 21.6\(1+0.35) = 16Khz. The budget for the transmitting link and receiving link in the handset mode supported by the first antenna ANT1 is as follows:

(4) RX Sensitivity = -174 + 5dB (C/N) + 10*log (16Khz) + NF = -127 + NF = -127 + 4.3 = -122.7dbm

(5) Noise factor (NF total) ≈ NF1 + NF2 = (trace loss 1.8 + SP4T loss 0.5*3 + LNANF0.6)

+(RX filter Loss+Balun loss+RFIC NF-1)/LNA Gain＝3.9+0.4＝4.3

(6) Transmission performance (TX) = 37-loss = 37-4 = 33dbm

From the above data, it can be seen that the insertion loss (Loss) of the first antenna ANT1 is too large. From the RX link budget, it can be seen that the receiving link of the first antenna ANT1 has an additional switch compared to the second antenna ANT2, and the insertion loss will be too large, close to 2dbm.

For the structure shown in FIG7 , taking the sixth switch module 26 as a DPDT switch as an example, compared with FIG8 , the sixth switch module 26 is equivalent to the fifth switch unit 261 and the sixth switch unit 262 in FIG8 , which increases the integration of the device and reduces the cost and the device occupied area.

Further, under the same conditions, for the structure shown in FIG4, the gain of the first low-noise amplifier unit 40 is 19.8 dB, the first switch unit 211 is an SP2T switch, and the second switch unit 212 and the second switch module 22 are SP4T switches. The budgets for the transmit link and receive link in the speaker mode supported by the second antenna ANT2 are consistent with the budgets in FIG8 above, without change. The budgets for the transmit link and receive link in the handset mode supported by the first antenna ANT1 are as follows:

(1) RX Sensitivity = -174 + 5dB (C/N) + 10*log (16Khz) + NF = -127 + NF = -127 + 2 = -125dbm

(2) Noise factor (NF total) ≈ NF1 + NF2 = (trace loss 0.5 + SP4T loss 0.5 + LNA NF 0.6)

+(RX filter Loss+Balun loss+RFIC NF-1)/LNAGain＝1.6+0.4＝2

(3) Transmission performance (TX) = 37-loss = 37-4 = 33dbm

From the above data, it can be seen that compared with the structure shown in FIG8, FIG4 adds a first low-noise amplifier unit 40 near the first antenna ANT1, and controls the working states of the three low-noise amplifier units as shown in the above Table 1, and the receiving sensitivity of the first antenna ANT1 in the handset mode is improved by 2.3dbm.

For the structure shown in FIG3 , taking the first switch module 21 as a DP4T switch as an example, compared with FIG4 , the first switch module 21 is equivalent to the first switch unit 211 and the second switch unit 212 in FIG4 , which increases the integration of the device and reduces the cost and the area occupied by the device.

Furthermore, under the same conditions, for the structure shown in FIG6, taking the third switch module 23, the third switch unit 241, and the fourth switch unit 242 as SP2T switches, and the second switch module 22 as an SP4T switch as an example, the transmission path of the first antenna ANT1 only passes through two switches from the low-pass filter, namely, one SP2T and one SP4T, which reduces the insertion loss of one switch compared to the solution of FIG4, and the TX performance can be improved by about 0.5-0.7db. The specific TX link budget TX = 37-loss = 37-3.4 = 33.6dbm.

For the structure shown in FIG5 , taking the fourth switch module 24 as a DPDT switch as an example, compared with FIG6 , the fourth switch module 24 is equivalent to the third switch unit 241 and the fourth switch unit 242 in FIG6 , which increases the integration of the device and reduces the cost and the device occupied area.

The communication device 1 provided in the embodiment of the present application can support satellite communication in the handset mode and the speaker mode, and adds an LNA (i.e., the first low-noise amplifier unit 40) near the antenna supporting the handset mode to improve the sensitivity. At the same time, the gain of the front end in the path cannot be too large, and the intermediate LNA (i.e., the second low-noise amplifier unit 131) is bypassed (Bypass) through GPIO to solve the problem of excessive gain, thereby improving the reception performance of the communication device 1 for satellite signals; in addition, the transmission performance of the communication device 1 for satellite signals is further improved through the change and combination design of the switch.

Based on the same inventive concept, the embodiment of the present application also provides an antenna switching method applied to the above communication device 1. The implementation solution provided by the antenna switching method to solve the problem is similar to the implementation solution recorded in the above communication device 1, so the specific limitations in one or more antenna switching method embodiments provided below can refer to the above limitations on the communication device 1, and will not be repeated here.

In one embodiment, as shown in FIG. 9 , an antenna switching method is provided, which can be applied to the communication device 1 provided in the above embodiment. In combination with FIG. 1 to FIG. 8 , the antenna switching method can include the following steps S901 and S902 .

S901: Determine an audio output mode of a communication device, wherein the audio output mode includes a handset mode or a speaker mode.

S902: Control the conduction state of the switch circuit in the communication device according to the audio output mode to support the transmission and reception of satellite signals through the target antenna of the communication device.

The communication device 1 can set a corresponding software algorithm to implement antenna switching. Exemplarily, as shown in FIG10, the communication device 1 can display an audio output mode selection interface in a satellite communication scenario, and the user can touch the display interface and generate a corresponding mode selection instruction to select a handset mode or a speaker mode for satellite communication. Accordingly, after the communication device 1 obtains the mode selection instruction, it can determine whether the audio output mode of the communication device 1 is a handset mode or a speaker mode according to the mode selection instruction, thereby determining the target antenna from at least two antennas according to the audio output mode, and controlling the conduction state of the switch circuit 20 to support the reception and transmission of satellite signals through the target antenna, that is, by switching the target antenna to achieve the switching between the handset mode and the speaker mode, so as to achieve the satellite communication of the communication device 1 in the handset mode and the speaker mode, expand the satellite communication mode of the communication device 1, and improve the satellite communication performance of the communication device 1.

It should be noted that the control of the conduction state of the switch circuit 20 by the communication device 1 in different modes can be carried out by setting a corresponding logic control process according to the specific structure of the communication device 1. For details, please refer to the relevant description of the communication device 1 provided in the aforementioned embodiment, which will not be repeated here.

In one embodiment, the time for the communication device 1 to switch the audio output mode of the communication device 1 through the switch circuit 20 is less than or equal to the idle time of the communication device 1 in time-divisionally transmitting and receiving satellite signals. Based on this, the logic of antenna switching is switched in the (RX) time slot after the transmission (TX) time slot is completed, so as to avoid damage to the power amplifier 123 in the RF transceiver circuit 10.

Exemplarily, the communication device 1 switches the conduction state between the target antenna and the RF transceiver circuit 10 in time-sharing mode to support the time-sharing transmission and reception of satellite signals. FIG11 provides a working timing diagram of the communication device 1 transmitting and receiving satellite signals during satellite communication. Taking the example of a cycle time of receiving and transmitting (RX/TX) satellite signals of 60ms, RX time of 11.7ms, and the gap time of RX switching to TX or TX switching to RX of 300us, the time for the communication device 1 to switch the audio output mode through the switch circuit 20 is less than or equal to 300us, which can better protect the reliability of the PA. Taking the structure shown in FIG8 as an example, when the communication device 1 switches between the handset mode and the speaker mode under satellite communication, the software implementation can perform the logic switching of the sixth switch unit 262 (SP2T switch) in the RX time slot, thereby ensuring that the power amplifier 123 on the transmission path is transmitting at high power when there is no-load switching.

Taking the structure shown in FIG8 and the working scenario shown in FIG11 as examples, FIG12 provides a timing simulation schematic diagram of antenna switching of a communication device 1 during satellite communication, wherein the right figure of FIG12 is a grayscale figure of the left figure. When the user selects the handset mode in the audio output mode selection interface of the communication device 1, the user performs a touch operation on the communication device 1, and the communication device 1 can generate a mode selection instruction according to the touch operation. After receiving the mode selection instruction, the satellite protocol stack waits until the TX time slot ends to execute, and completes the switch before the next RX time slot. It can be seen from FIG12 that the GPIO level of the antenna switching switch is switched during the RX time slot. As can be seen from FIG12, the RX duration is approximately 48ms, wherein the waveform indicated by the arrow corresponds to the sixth switch unit 262. When the waveform indicated by the arrow is in a low level state, the sixth switch unit 262 conducts the path between the fifth switch unit 261 and the second antenna ANT2, and disconnects the path between the fifth switch unit 261 and the second antenna ANT2. In this case, the communication device 1 is in a satellite communication state in the speaker mode. After the conduction state of the sixth switch unit 262 is switched within the gap time 300um between TX and RX, the waveform indicated by the arrow switches from a low level state to a high level state. In this case, the sixth switch unit 262 switches on the path between the fifth switch unit 261 and the second antenna ANT2, and disconnects the path between the fifth switch unit 261 and the second antenna ANT2, thereby switching the satellite communication mode of the communication device 1 from the speaker mode to the receiver mode. In this way, damage to the device due to switch switching in the PA working state can be avoided, and the reliability and stability of the communication device 1 are guaranteed.

In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims (15)

1. A communication device, comprising: Radio frequency transceiver circuit, used to support the transceiver processing of satellite signals; A switch circuit, connected to the radio frequency transceiver circuit and at least two antennas, respectively, and used to select a path between any antenna and the radio frequency transceiver circuit; A processing circuit is connected to the switching circuit, and is used to determine a target antenna from the multiple antennas according to an audio output mode of the communication device, and control the conduction state of the switching circuit to support the reception and transmission of satellite signals through the target antenna; wherein the audio output mode includes a handset mode or a speaker mode, and the communication device meets a preset antenna specific absorption rate requirement in the handset mode. 2. The communication device according to claim 1, characterized in that the at least two antennas include a first antenna and a second antenna, wherein the first antenna is located at a side of the communication device, the second antenna is located at a top of the communication device, and the first antenna and the second antenna are respectively connected to the switch circuit; The communication device further includes a first low-noise amplifying unit, which is connected to the switch circuit and is arranged on a path between the radio frequency transceiver circuit and the first antenna; wherein the first low-noise amplifying unit is arranged close to the first antenna; The radio frequency transceiver circuit comprises at least a second low noise amplifying unit, and the second low noise amplifying unit is arranged close to the second antenna; The processing circuit is also used to select and control the first low-noise amplification unit to perform low-noise amplification processing on the satellite signal received by the first antenna in the handset mode, and to select and control the second low-noise amplification unit to perform low-noise amplification processing on the satellite signal received by the second antenna in the speaker mode. 3 . The communication device according to claim 2 , wherein the gain coefficient of the first low-noise amplification unit is the same as that of the second low-noise amplification unit. 4. The communication device according to claim 3, characterized in that the processing circuit is further used to control the switch circuit to conduct a branch in which the first low-noise amplifier unit performs low-noise amplification processing on the satellite signal received by the first antenna in the handset mode, and to control the first low-noise amplifier unit to be in an amplification state and the second low-noise amplifier unit to be in a bypass state; wherein the bypass state refers to a working state in which the low-noise amplifier unit transmits the satellite signal but does not perform low-noise amplification processing; The processing circuit is also used to control the switch circuit to turn on the branch in which the second low-noise amplifying unit performs low-noise amplification processing on the satellite signal received by the second antenna in the speaker mode, and to control the first low-noise amplifying unit to be in a bypass state and the second low-noise amplifying unit to be in an amplification state. 5. The communication device according to claim 3 is characterized in that the RF transceiver circuit also includes a third low-noise amplification unit, the third low-noise amplification unit is connected to the second low-noise amplification unit, and the third low-noise amplification unit is used to support low-noise amplification processing of the satellite signal. 6. The communication device according to claim 5, characterized in that the target low-noise amplification unit includes at least one of the first low-noise amplification unit, the second low-noise amplification unit and the third low-noise amplification unit, and the target low-noise amplification unit includes a low-noise amplifier and a bypass switch connected in parallel; wherein, The processing circuit is also connected to the bypass switch, and the processing circuit is also used to control the conduction state of the bypass switch to control the amplification state of the target low-noise amplification unit; wherein, When the bypass switch is in the on state, the target low-noise amplifier unit operates in the bypass state; When the bypass switch is in an off state, the target low-noise amplifying unit operates in an amplifying state. 7. The communication device according to claim 2, characterized in that the switch circuit comprises a first switch module and a second switch module; wherein, The first switch module is connected to the first low-noise amplifying unit, the second low-noise amplifying unit, the second switch module, and the second antenna respectively, and the first switch module is used to select and conduct the paths between the first low-noise amplifying unit, the second switch module, the second antenna, and the second low-noise amplifying unit respectively; The second switch module is connected to the first low-noise amplifying unit and the first antenna respectively, and the second switch module is used to select and conduct the paths between the first low-noise amplifying unit, the first switch module and the first antenna respectively; The processing circuit is used to control the conduction state of the first switch module and the second switch module in the handset mode to support the transmission and reception of the satellite signal through the first antenna; the processing circuit is also used to control the conduction state of the first switch module and the second switch module in the speaker mode to support the transmission and reception of the satellite signal through the second antenna. 8. The communication device according to claim 7, characterized in that the first switch module comprises a first switch unit and a second switch unit; wherein, The first switch unit is connected to the second low-noise amplifying unit, the second switch unit, and the processing circuit respectively, and the first switch unit is used to select and conduct a path between the second low-noise amplifying unit and the second switch unit under the control of the processing circuit; The second switch unit is connected to the first low-noise amplifying unit, the second switch module, the second antenna, and the processing circuit respectively. The second switch unit is used to select and conduct the paths between the first low-noise amplifying unit, the second switch module, the second antenna, and the first switch unit respectively under the control of the processing circuit. 9. The communication device according to claim 7, characterized in that the communication device further comprises a first receiving circuit, the first receiving circuit is connected to the second switch module, and the first receiving circuit is used to support reception and processing of radio frequency signals; wherein the communication system of the radio frequency signal and the satellite signal is different; The processing circuit is further used to control the conduction state of the second switch module so that the first antenna supports the transmission and reception of the radio frequency signal. 10. The communication device according to claim 2, characterized in that the RF transceiver circuit further comprises a transmitting module and a RF transceiver, and the switch circuit comprises a third switch module, a fourth switch module and a fifth switch module; wherein, The third switch module is connected to the RF transceiver, the first low-noise amplifying unit, the second low-noise amplifying unit, and the processing circuit respectively, and the third switch module is used to select and conduct the paths between the first low-noise amplifying unit, the second low-noise amplifying unit and the RF transceiver respectively under the control of the processing circuit; The fourth switch module is connected to the transmitting module, the second low-noise amplifying unit, the second switch module, the second antenna, and the processing circuit respectively. The fourth switch module is used to select and conduct the paths between the second switch module, the second antenna, and the transmitting module respectively, and select and conduct the paths between the second switch module, the second antenna, and the second low-noise amplifying unit respectively under the control of the processing circuit; The fifth switch module is respectively connected to the fourth switch module, the first low-noise amplifying unit, the first antenna, and the processing circuit. The fifth switch module is used to select and conduct the paths between the fourth switch module, the first low-noise amplifying unit, and the first antenna respectively under the control of the processing circuit. 11. The communication device according to claim 10, characterized in that the fourth switch module comprises a third switch unit and a fourth switch unit; wherein, The third switch unit is connected to the transmitting module, the fifth switch module, the fourth switch unit, and the processing circuit respectively, and the third switch unit is used to select and conduct the paths between the fifth switch module, the fourth switch unit, and the transmitting module respectively under the control of the processing circuit; The fourth switch unit is connected to the second low-noise amplifying unit, the second antenna, and the processing circuit respectively. The fourth switch unit is used to select and conduct the paths between the third switch unit, the second low-noise amplifying unit, and the second antenna respectively under the control of the processing circuit. 12. The communication device according to claim 1, wherein the at least two antennas include at least a first antenna and a second antenna, and the first antenna and the second antenna are respectively connected to the switch circuit; The switch circuit includes a sixth switch module and a seventh switch module, wherein the sixth switch module is connected to the RF transceiver circuit, the seventh switch module, the second antenna, and the processing circuit respectively, and the sixth switch module is used to select and conduct the paths between the seventh switch module, the second antenna, and the RF transceiver circuit respectively under the control of the processing circuit; The seventh switch module is connected to the first antenna and the processing circuit respectively, and the seventh switch module is used for selecting and conducting a path between the sixth switch module and the first antenna under the control of the processing circuit. 13. The communication device according to claim 12, characterized in that the sixth switch module comprises a fifth switch unit and a sixth switch unit; wherein, The fifth switch unit is connected to the RF transceiver circuit, the sixth switch unit, and the processing circuit respectively, and the fifth switch unit is used to select and conduct the path between the RF transceiver circuit and the sixth switch unit under the control of the processing circuit; The sixth switch unit is connected to the seventh switch module, the second antenna, and the processing circuit respectively. The sixth switch unit is used to select and conduct the paths between the seventh switch module, the second antenna, and the fifth switch unit respectively under the control of the processing circuit. 14. An antenna switching method, characterized in that it is applied to the communication device according to any one of claims 1 to 13, and the method comprises: Determining an audio output mode of the communication device; wherein the audio output mode includes a handset mode or a speaker mode; The conduction state of the switch circuit in the communication device is controlled according to the audio output mode to support the transmission and reception of satellite signals through the target antenna of the communication device. 15. The antenna switching method according to claim 14, characterized in that the time for the communication device to switch the audio output mode of the communication device through the switch circuit is less than or equal to the gap time of the communication device in time-sharing transmission and reception of the satellite signal.