Communication terminal

Abstract

The embodiment of the utility model relates to the field of circuits, and provides a communication terminal, which comprises a communication module for providing an initial signal; the power coupler is connected with the communication module, receives the initial signal and generates and outputs a first signal; and the switch amplification circuit is connected with the power coupler and is used for receiving a control signal of the communication module, the control signal is used for controlling the switch-on and switch-off of the switch amplification circuit, and the first signal is amplified when the switch amplification circuit is switched on so as to generate and output a second signal. According to the invention, at least low-power signals and high-power signals can be output at the same time, and transmission of normal low-power signals is not affected while high-power amplification is carried out on the signals needing to be amplified.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the field of circuits, and particularly to a communication terminal. Background Art

[0002] The normal output power standards for current communication terminals are 23 dBm (CLASS3) and 26 dBm (CLASS2). However, for some remote areas, such power cannot meet the actual usage requirements. Therefore, it is necessary to increase the power level to CLASS1, and the power needs to reach 31 dBm.

[0003] Currently, it is necessary to provide a communication terminal that can meet the power frequency band requirements of different regions while not affecting the transmission of normal power signals. Summary of the Utility Model

[0004] Embodiments of the present disclosure provide a communication terminal that can at least balance the output of low-power signals and high-power signals, and can amplify high-power signals that need to be amplified without affecting the transmission of normal low-power signals.

[0005] According to some embodiments of the present disclosure, on the one hand, a communication terminal is provided, including: a communication module that provides an initial signal; a power coupler connected to the communication module, receiving the initial signal, generating and outputting a first signal; a switch amplification circuit connected to the power coupler, receiving a control signal of the communication module, the control signal controlling the on and off of the switch amplification circuit, and when the switch amplification circuit is on, amplifying the first signal to generate and output a second signal.

[0006] In some embodiments, the switch amplification circuit includes: a switch circuit connected to the power coupler; an amplification circuit connected to the switch circuit, receiving the first signal when conducting with the amplification circuit.

[0007] In some embodiments, the switch circuit includes: a single-pole double-throw switch, the common terminal of the single-pole double-throw switch is connected to the power coupler, the first branch terminal is connected to the input terminal of the amplification circuit, and the second branch terminal is connected to the ground terminal.

[0008] In some embodiments, the amplification circuit includes: a power amplifier, the input terminal of the power amplifier is connected to the switch circuit.

[0009] In some embodiments, the amplification circuit further includes: a circulator, the circulator is connected to the output terminal of the power amplifier.

[0010] In some embodiments, the amplifying circuit further includes: a filter connected to the output end of the circulator.

[0011] In some embodiments, the communication terminal also includes: a control module, one end of which is connected to the communication module, and the other end is connected to the switching circuit and the amplifying circuit, receiving the control signal of the communication module and controlling the closing and opening of the switching circuit and the amplifying circuit.

[0012] In some embodiments, the control module includes: a control line, one end of which is connected to the communication module, and the other end of which is connected to the switch circuit and the amplification circuit.

[0013] In some embodiments, the method further includes: a low-power antenna, wherein the low-power antenna is connected to the power coupler and receives the first signal.

[0014] In some embodiments, it also includes: a high-power antenna, which is connected to the switching amplifier circuit to receive the second signal.

[0015] The technical solution provided by the embodiments of the present disclosure has at least the following advantages: an initial signal can be provided by a communication module, the initial signal includes radio frequency signals of all frequency bands, the initial signal is transmitted to a power coupler, and a first signal is generated after passing through the power coupler; when part of the first signal has low signal power and needs to be amplified, the first signal is input into a switching amplifier circuit and amplified to generate a second signal; at this time, the power coupler still outputs the first signal, so that an amplified second signal and a first signal before amplification can be output simultaneously, and a signal to be amplified can be amplified at high power; when the first signal does not need to be amplified, the switching amplifier circuit does not work, so that both low-power signals and high-power signals can be taken into account, so that the signal to be amplified can be amplified at high power without affecting the transmission of normal low-power signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings, and these exemplified descriptions do not constitute a limitation on the embodiments. Unless otherwise specified, the pictures in the drawings do not constitute a scale limitation. In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the traditional technology, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A module diagram of a communication terminal provided by an embodiment of the present disclosure;

[0018] Figure 2 A circuit diagram of a communication terminal provided by an embodiment of the present disclosure. Specific embodiments

[0019] As can be seen from the background art, current communication terminals integrate many frequency bands in one antenna output. If the power of a specific frequency band needs to be increased to 31 dBm, the integrated frequency bands need to be split first, and the frequency band whose power needs to be increased is extracted and then amplified. This will lead to an increase in the materials used, and at the same time, the insertion loss of other frequency bands will increase accordingly, resulting in poor performance.

[0020] An embodiment of the present disclosure provides a communication terminal. An initial signal can be provided through a communication module. The initial signal includes radio frequency signals of all frequency bands. The initial signal is transmitted to a power coupler, and a first signal is generated after passing through the power coupler. When some signals in the first signal have low power and need to be amplified, the first signal is input into a switch amplification circuit and amplified to generate a second signal. At this time, the power coupler still outputs the first signal. In this way, an amplified second signal and the first signal before amplification can be output simultaneously. The signal that needs to be amplified can be amplified with high power. When the first signal does not need to be amplified, the switch amplification circuit does not work, so that the output of low-power signals and high-power signals can be taken into account. While the signal that needs to be amplified is amplified with high power, it will not affect the transmission of normal low-power signals. This device does not need to split the integrated frequency bands, and only needs to amplify the specific frequency band without affecting the performance of other frequency bands.

[0021] The following will elaborate on the embodiments of the present disclosure in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that in the embodiments of the present disclosure, many technical details are proposed to help readers better understand the present disclosure. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed by the present disclosure can still be implemented.

[0022] Terms such as first or second can be used to describe various components, but these components are not limited by the above terms. The above terms are used to distinguish one component from another. For example, without departing from the scope of the concept of the present disclosure, the first component can be called the second component, and similarly, the second component can be called the first component.

[0023] In addition, "connected / coupled" means that one component is directly electrically coupled to another component or indirectly electrically coupled through another component. As long as it is not clearly stated in the sentence, the singular form can include the plural form. In addition, "comprising / including" or "comprises / includes" used in this specification means the presence or addition of one or more components, steps, operations, and elements. The specific structural or functional descriptions of the examples of the embodiments according to the concepts disclosed in this specification are only illustrated to describe the examples of the embodiments according to the concepts, and the examples of the embodiments according to the concepts can be implemented in various forms, but these descriptions are not limited to the examples of the embodiments described in this specification.

[0024] According to the concepts, various modifications and changes can be applied to the examples of the embodiments, such that the examples of the embodiments will be illustrated in the drawings and described in the specification. However, the examples of the embodiments according to the concepts are not limited to the specific embodiments, but include all changes, equivalents, or substitutions included within the spirit and technical scope of the present disclosure.

[0025] It should be understood that when describing that one element is "coupled" or "connected" to another element, the element can be directly coupled or directly connected to another element, or can be coupled or connected to another element through a third element. Conversely, it should be understood that when an element is said to be "directly connected to" or "directly coupled to" another element, no other element is placed between them. Other expressions describing the relationship between components (i.e., "between" and "directly between" or "adjacent to" and "directly adjacent to") need to be interpreted in the same way.

[0026] The terms used in this specification are only for describing the specific examples of the embodiments and are not intended to limit the present disclosure. If there is no clear contrary meaning in the context, the singular form can include the plural form. In this specification, it should be understood that the term "comprising" or "having" indicates the presence of the features, quantities, steps, operations, components, parts, or combinations thereof described in the specification, but does not preclude the possibility of the presence or addition of one or more other features, quantities, steps, operations, components, parts, or combinations thereof.

[0027] If there is no contrary definition, all terms used herein (including technical terms or scientific terms) have the same meaning as generally understood by those of ordinary skill in the art. If the terms defined in the common dictionary are not clearly defined in this specification, they should be interpreted as having the same meaning as in the context of the related art, and not as an ideal or overly formal meaning.

[0028] Descriptions of well-known components and processing techniques may be omitted so as not to unnecessarily obscure the embodiments of the present disclosure.

[0029] Throughout the specification, like reference numerals refer to like elements. Thus, even if a reference numeral is not mentioned or described with reference to one drawing, it can be mentioned or described with reference to another drawing. Additionally, even if a reference numeral is not shown in one drawing, it can be mentioned or described with reference to another drawing.

[0030] Furthermore, the logic level of a signal can be different from or opposite to the described logic level. For example, a signal described as having a logic "high" level can alternatively have a logic "low" level, and a signal described as having a logic "low" level can alternatively have a logic "high" level.

[0031] Reference Figure 1 , Figure 1 is a block diagram of a communication terminal provided by an embodiment of the present disclosure; Figure 2 is a circuit diagram of a communication terminal provided by an embodiment of the present disclosure.

[0032] In some embodiments, the communication terminal may include: a communication module 100, and the communication module 100 provides an initial signal Sig_St.

[0033] The communication terminal may further include: a power coupler 101, the power coupler 101 is connected to the communication module 100, receives the initial signal Sig_St, and generates and outputs a first signal Sig1.

[0034] The communication terminal may further include: a switch amplification circuit 102, the switch amplification circuit 102 is connected to the power coupler 101, receives a control signal of the communication module 100, the control signal controls the on and off of the switch amplification circuit 102, and when the switch amplification circuit 102 is on, it amplifies the first signal Sig1 to generate and output a second signal Sig2.

[0035] In an embodiment of the present disclosure, an initial signal Sig_St can be provided through a communication module 100. The initial signal Sig_St includes radio frequency signals of all frequency bands. The initial signal Sig_St is transmitted to a power coupler 101, and a first signal Sig1 is generated after passing through the power coupler 101. When some signals in the first signal Sig1 have low power and need to be amplified, the first signal Sig1 is input into a switching amplifier circuit 102 for amplification to generate a second signal Sig2. At this time, the power coupler 101 still outputs the first signal Sig1. In this way, an amplified second signal Sig2 and the first signal Sig1 before amplification can be output simultaneously. Signals that need to be amplified can be amplified with high power. When the first signal Sig1 does not need to be amplified, the switching amplifier circuit 102 does not work, so as to take into account the output of low-power signals and high-power signals. While high-power amplification is performed on signals that need to be amplified, the transmission of normal low-power signals is not affected. This device does not need to split the integrated frequency bands, and only needs to amplify specific frequency bands without affecting the performance of other frequency bands.

[0036] In some embodiments, for the communication module 100, it has been determined whether to amplify the initial signal Sig_St before providing the initial signal Sig_St. When amplification is required, the switching amplifier circuit 102 is controlled to work. When amplification is not required, the switching amplifier circuit 102 is controlled not to work.

[0037] In some embodiments, the power coupler 101 is also connected to a first resistor R1. By setting the connection between the power coupler 101 and the first resistor R1, the output of the first signal Sig1 has better directivity and coupling degree. For a communication terminal, the resistance value of the first resistor R1 is generally 50Ω.

[0038] It should be noted that the above numerical values of the impedance are only descriptions under general circumstances and do not limit the resistance value of the first resistor.

[0039] In some embodiments, the other end of the first resistor R1 is connected to the ground terminal.

[0040] It should be noted that in the figure, it seems that the switching amplifier circuit 102 is also connected to the first resistor R1 and the ground terminal. In fact, this is not the case. One output terminal of the power coupler 101 is connected to the switching amplifier circuit 102, and the other output terminal is connected to the first resistor R1. The first resistor R1 is not connected to the switching amplifier circuit 102.

[0041] In some embodiments, the switch amplification circuit 102 includes: a switch circuit 112, the switch circuit 112 is connected to the power coupler 101; an amplification circuit 122, the amplification circuit 122 is connected to the switch circuit 112 and receives the first signal Sig1 when the switch circuit 112 is turned on. By setting the switch circuit 112, the on and off of the transmission path between the amplification circuit 122 and the communication module 100 can be controlled. When signal amplification is required, the switch circuit 112 is turned on, and the power coupler 101 transmits the signal to be amplified to the amplification circuit 122 through the switch. Then, the signal to be amplified is amplified by the amplification circuit 122 to generate the second signal Sig2.

[0042] In some embodiments, the switch circuit 112 may include: a single-pole double-throw switch 132. The common terminal of the single-pole double-throw switch 132 is connected to the power coupler 101, the first branch terminal is connected to the input terminal of the amplification circuit 122, and the second branch terminal is connected to the ground terminal. For the single-pole double-throw switch 132, when amplification is required, the common terminal is connected to the first branch terminal, so as to transmit the first signal Sig1 to the amplification circuit 122 to generate the second signal Sig2. When amplification is not required, the common terminal is connected to the second branch terminal, so that the power coupler 101 is connected to the ground terminal and the first signal Sig1 is not amplified, and thus the second signal Sig2 is not generated.

[0043] By setting the switch circuit 112 to include a single-pole double-throw switch 132, the connection between the power coupler 101 and the amplification circuit 122 can be selectively controlled, so that the first signal Sig1 can be selectively amplified, and the signal to be amplified can be amplified with high power. When the first signal Sig1 does not need to be amplified, the switch amplification circuit 102 does not work, so that both low-power signals and high-power signals can be taken into account. While the signal to be amplified is amplified with high power, the transmission of normal low-power signals is not affected.

[0044] In some embodiments, a second resistor R2 is further included between the second branch terminal and the ground terminal. The second resistor R2 can play an isolation role, so as to improve the reliability of the connection between the power coupler 101 and the ground terminal when the switch circuit 112 is toggled to the second branch terminal.

[0045] In some embodiments, the switch circuit 112 may further include: a single-pole single-throw switch. By setting the switch circuit 112 as a single-pole single-throw switch, it is also possible to control whether to transmit the first signal to the amplification circuit 122, and it is also possible to determine whether to amplify the first signal according to the need.

[0046] In some embodiments, the amplifying circuit 122 may include: a power amplifier 142, and an input end of the power amplifier 142 is connected to the switching circuit 112. By arranging the power amplifier 142 to amplify the received first signal Sig1, a second signal Sig2 is generated.

[0047] It should be noted that the power amplifier 142 can be abbreviated as RF power amplifier, which is generally used for amplifying RF signals and can provide sufficient power to the antenna. The type of the power amplifier can be selected from various types. For example, it can be a gallium arsenide amplifier or a gallium nitride amplifier, etc.

[0048] In some embodiments, the amplifying circuit 122 further includes: a circulator 152, and the circulator 152 is connected to an output end of the power amplifier 142. By arranging the circulator 152, the transmission direction of the second signal Sig2 can be controlled, thereby improving the reliability of the transmission of the entire amplifying circuit.

[0049] It should be noted that the circulator 152 is a multi-port device that transmits the incident wave entering any of its ports to the next port in the direction determined by the static bias magnetic field in sequence. Its prominent feature is unidirectional energy transmission, and it controls the electromagnetic wave to transmit along a certain circular direction. Taking the circulator having three ports, where the three ports are port 1, port 2, and port 3 respectively, for the circulator 152, the signal can only go from port 1 to port 2, and cannot return from port 2 to port 1, that is, unidirectional conduction.

[0050] In some embodiments, taking the circulator 152 including three ports as an example, one of the ports is connected to the output end of the power amplifier 142, another port serves as the output end of the circulator 152, and the last port is grounded through a resistor R3, thereby avoiding the reflection of the output signal to the input end.

[0051] In some embodiments, it may further include: replacing the three-port device circulator with a two-port device isolator.

[0052] In some embodiments, the amplifying circuit 122 may further include: a filter 162, and the filter 162 is connected to the output end of the circulator 152. By arranging the amplifying circuit 122 to include the filter 162, the required frequency components can be retained, specific filtered signals can be transmitted, and the mutual interference between frequency bands can be eliminated.

[0053] In some embodiments, the filter 162 can be any one of a low-pass filter, a high-pass filter, a band-pass filter, or a band-stop filter, and the corresponding filter can be selected according to requirements.

[0054] In some embodiments, the communication terminal may further include: a control module 103. One end of the control module 103 is connected to the communication module 100, and the other end is connected to the switch circuit 112 and the amplification circuit 122. The control module 103 receives the control signal of the communication module 100 and controls the closing and opening of the switch circuit 112 and the amplification circuit 122. By providing the control module 103, the closing and opening of the switch circuit 112 and the amplification circuit 122 can be directly controlled through the communication module 100. It can be understood that for the communication module 100, the communication module 100 provides the initial signal. Then, for the communication module 100, the communication module 100 itself is very clear about the power levels of the provided initial signals at different times. Therefore, when the communication module 100 outputs a signal that needs to be amplified, a control signal is provided synchronously to control the closing of the switch circuit 112 and the amplification circuit 122, which facilitates the communication terminal to output a suitable signal.

[0055] In some embodiments, the control module 103 includes: a control line 113. One end of the control line 113 is connected to the communication module 100, and the other end is connected to the switch circuit 112 and the amplification circuit 122. By providing that the control module 103 includes the control line 113, it is convenient to control the closing and opening of the switch circuit 112 and the amplification circuit 122, so as to amplify some of the first signals Sig1 according to requirements. Thus, while high-power amplifying the signals that need to be amplified, the transmission of normal-power signals will not be affected.

[0056] In some embodiments, the control line 113 may be a GPIO (general purpose input output) control line.

[0057] In some embodiments, the communication terminal may further include: a low-power antenna 104. The low-power antenna 104 is connected to the power coupler 101 and receives the first signal Sig1. It can be understood that the low-power antenna 104 receives the entire first signal Sig1. Regardless of the power level of the first signal Sig1, the low-power antenna 104 will receive it. After receiving, it can be output through the low-power antenna 104. By providing the low-power antenna 104, the output reliability can be improved.

[0058] In some embodiments, the communication terminal may further include: a high-power antenna 105. The high-power antenna 105 is connected to the switch amplification circuit 102 and receives the second signal Sig2. It can be understood that the high-power antenna 105 receives the second signal Sig2 which is the amplified part of the first signal Sig1. After receiving, it can be output through the high-power antenna 105. By providing the high-power antenna 105, the output reliability can be improved.

[0059] In some embodiments, for the low-power antenna 104 and the high-power antenna 105, when output is required, the low-power antenna 104 continuously outputs. The high-power antenna 105 outputs after receiving the amplified second signal Sig2. When the high-power antenna 105 outputs, the low-power antenna 104 still outputs.

[0060] For example, when the power of the initial signal is 20 dBm, the power of the first signal Sig1 generated by the power coupler is 20 dBm. For the low-power antenna 104, the low-power antenna 104 receives and outputs a 20-dBm signal. The coupling degree of the power coupler is 20 dB. Therefore, when the power of the first signal Sig1 is 0 dBm (20 dBm - 20 dB), taking the example of amplifying the power of the first signal Sig1 by 30 dB, the power of the generated second signal Sig2 is 30 dBm. For the high-power antenna 105, the high-power antenna 105 receives and outputs a 30-dBm signal. For the communication terminal, both the low-power antenna 104 and the high-power antenna 105 of the communication terminal output, and according to the formula P = Pmax + 10 * log[1 + 1 / 10^((Pmax - Pmin) / 10)], a signal of 30.4 dBm is output. Among them, Pmax represents the power of the high-power antenna 105, and Pmin represents the power of the low-power antenna 104.

[0061] For this application, it can be that first, the base station frequency band received by the low-power antenna 104 is obtained. At the same time, the communication module 100 determines whether high power is required for the current transmission according to the signal strength received in the current frequency band (normally, a weak received signal indicates a need for higher power, and a strong received signal does not require high power). Then, if high power is required, the communication module 100 controls the switch amplifier circuit 102 to conduct, and then amplifies the received signal and outputs a high-power signal.

[0062] In an embodiment of the present disclosure, an initial signal Sig_St can be provided through a communication module 100. The initial signal Sig_St includes radio frequency signals of all frequency bands. The initial signal Sig_St is transmitted to a power coupler 101, and a first signal Sig1 is generated after passing through the power coupler 101. When some signal power in the first signal Sig1 is low and needs to be amplified, the first signal Sig1 is input into a switching amplifier circuit 102 and amplified to generate a second signal Sig2. At this time, the power coupler 101 still outputs the first signal Sig1. In this way, an amplified second signal Sig2 and the first signal Sig1 before amplification can be output simultaneously. Signals that need to be amplified can be amplified with high power. When the first signal Sig1 does not need to be amplified, the switching amplifier circuit 102 does not work, so that the output of low-power signals and high-power signals can be taken into account. While high-power amplification is performed on signals that need to be amplified, the transmission of normal low-power signals is not affected. This device does not need to split the integrated frequency bands, and only needs to amplify specific frequency bands without affecting the performance of other frequency bands.

[0063] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present disclosure. In actual applications, various changes can be made in form and details without departing from the spirit and scope of the embodiments of the present disclosure. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the embodiments of the present disclosure. Therefore, the protection scope of the embodiments of the present disclosure should be subject to the scope defined by the claims.

Claims

1. A communication terminal, characterized in that: include: A communication module, wherein the communication module provides an initial signal; A power coupler, the power coupler is connected to the communication module, receives the initial signal, generates and outputs a first signal; A switch amplifier circuit is connected to the power coupler and receives a control signal from the communication module. The control signal controls the switch amplifier circuit to be turned on and off. When the switch amplifier circuit is turned on, the switch amplifier circuit amplifies the first signal and generates and outputs a second signal.

2. The communication terminal according to claim 1, characterized in that: The switch amplifier circuit comprises: a switch circuit connected to the power coupler; An amplifier circuit is connected to the switch circuit and receives the first signal when the amplifier circuit is turned on.

3. The communication terminal according to claim 2, characterized in that: The switch circuit comprises: A single-pole double-throw switch, wherein a common end of the single-pole double-throw switch is connected to the power coupler, a first branch end is connected to the input end of the amplifier circuit, and a second branch end is connected to the ground end.

4. The communication terminal according to claim 2, characterized in that: The amplifying circuit comprises: A power amplifier, wherein an input end of the power amplifier is connected to the switch circuit.

5. The communication terminal according to claim 4, characterized in that: The amplifying circuit further comprises: A circulator is connected to the output end of the power amplifier.

6. The communication terminal according to claim 5, characterized in that: The amplifying circuit further comprises: A filter is connected to the output end of the circulator.

7. The communication terminal according to claim 2, characterized in that: The communication terminal further includes: A control module, one end of which is connected to the communication module, and the other end of which is connected to the switch circuit and the amplifier circuit, receives the control signal of the communication module, and controls the closing and opening of the switch circuit and the amplifier circuit.

8. The communication terminal according to claim 7, characterized in that: The control module comprises: A control line, one end of which is connected to the communication module, and the other end of which is connected to the switch circuit and the amplifier circuit.

9. The communication terminal according to claim 1, characterized in that: Also includes: A low-power antenna is connected to the power coupler and receives the first signal.

10. The communication terminal according to claim 1, characterized in that: Also includes: A high-power antenna is connected to the switch amplifier circuit to receive the second signal.

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