CN112615630B - Circuit and method for improving radio frequency isolation and mobile terminal - Google Patents
Circuit and method for improving radio frequency isolation and mobile terminal Download PDFInfo
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- CN112615630B CN112615630B CN202011444849.XA CN202011444849A CN112615630B CN 112615630 B CN112615630 B CN 112615630B CN 202011444849 A CN202011444849 A CN 202011444849A CN 112615630 B CN112615630 B CN 112615630B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The embodiment of the invention discloses a circuit, a method and a mobile terminal for improving radio frequency isolation, wherein the circuit comprises: the switch module comprises at least two isolation control modules; the isolation control module receives signals of a plurality of frequency bands and is used for outputting attenuated signals; the switch module is connected with the isolation control module and used for gating a radio frequency channel according to a received frequency band, the radio frequency channel corresponds to the isolation control module corresponding to the received frequency band and outputs the signal meeting the requirement of preset isolation. The scheme improves the radio frequency isolation, and the space which can be saved is realized by combining frequency bands according to requirements, and the more the combination is, the more the space is saved relatively.
Description
Technical Field
The invention relates to a radio frequency circuit, in particular to a circuit, a method and a mobile terminal for improving radio frequency isolation.
Background
With the continuous development and popularization of the 5G technology of the fifth generation mobile communication system, people have higher and higher requirements on the user experience of the terminal. But meanwhile, the compatibility problem of the existing 2G \3G \4G network needs to be considered, which undoubtedly provides higher challenges for the design of the terminal equipment. In the current terminal design, an EN-DC scenario in which 5G and 4G are simultaneously used needs to be considered, and a CA scenario in which carriers are aggregated between different frequency bands of 4G needs to be considered. In these simultaneous working scenarios, the problem of interference and mutual interference between the two must be considered. For example, if the power detection part has insufficient isolation, in the scenario of the endec, leakage of a 4G signal from a PORT of a switch to a PORT of a 5G signal occurs, or leakage of a 5G signal from the switch to a PORT of a 4G signal occurs, so that SNR (signal-to-noise ratio) of the power detection FBRX is affected, which leads to inaccurate power control and affects power control. The isolation issue is taken into account in the design.
The existing design mostly adopts a switch cascade mode to increase the isolation between two frequency bands working simultaneously, because the isolation of a single switch is not enough under normal conditions, the more frequency bands are required, the more switches are required, and the more frequency bands working simultaneously, the more switches are increased. Along with the introduction of the terminal equipment 5G technology, a very serious test is provided for the PCB area of a radio frequency part, and the increase of about two thirds of the area of a 5G radio frequency device on the same PCB area brings great difficulty for layout and routing, and the position of even a small switch device is precious. And later developments will yield more endec and CA combinations and space will only become increasingly tight. This is very wasted space in the trend that the PCB area is more and more precious, and the design difficulty is increased by adding the signal routing.
In the conventional 4G operation mode, more upstream CAs support intra-band, and fewer inter-band CAs, so the consideration of the isolation is not obvious, and two PAs (power amplifiers) can be directly connected in series to realize the operation without switching. However, with the introduction of 5G and the state of NSA that will exist for a long time, the design of the corresponding 4G network part is also taking into account the inter-band situation more and more. Under the working scene of ENDC or CA, when the multiple frequency bands work simultaneously, the requirement on the mutual isolation degree among the frequency bands is higher, so that the respective normal working states are ensured. Taking the power detection part circuit as an example, the frequency bands CA or endec distributed on different PAs require the cascade connection of at least two switches, such as a group of SPXT + SPXT in fig. 1 to meet the design requirement, and there are many combinations different on different PAs, so that a plurality of such array forms of SPXT + SPXT will appear, and what is the case later is 3CA \4 CA.
Accordingly, there is a need in the art for improvements.
Disclosure of Invention
The embodiment of the invention provides a circuit, a method and a mobile terminal for improving radio frequency isolation, which reduce the layout space tension caused by cascading a plurality of switches.
The circuit for improving radio frequency isolation provided by the embodiment of the invention comprises: the switch module comprises at least two isolation control modules; the isolation control module receives signals of a plurality of frequency bands and is used for outputting attenuated signals; the switch module is connected with the isolation control module and used for gating a radio frequency channel according to a received frequency band, the radio frequency channel corresponds to the isolation control module corresponding to the received frequency band and outputs the signal meeting the requirement of preset isolation.
Optionally, in some embodiments of the present invention, the isolation control module receives signals of multiple frequency bands, and is configured to output an attenuated signal, including:
the isolation control module includes an attenuation network or a filter network.
Optionally, in some embodiments of the present invention, the isolation control module receives signals of multiple frequency bands, and is configured to output an attenuated signal, including:
a capacitor, an inductor;
and a node is arranged between the adjacent capacitors and is used for connecting the capacitors in series, one end of the inductor is connected with the node, and the other end of the inductor is grounded.
Optionally, in some embodiments of the present invention, the isolation control module receives signals of multiple frequency bands, and is configured to output an attenuated signal, including:
setting a first radio frequency control module to be in a minimum loss mode;
setting a loss value of a second isolation control module, and acquiring the port isolation degree of the first isolation control module and the second isolation control module, wherein the sum of the port isolation degree and the loss value is greater than a preset isolation value.
Optionally, in some embodiments of the present invention, the switching module is connected to the isolation control module, and configured to gate a radio frequency path according to a received frequency band, where the radio frequency path corresponds to the isolation control module corresponding to the received frequency band, and output a signal meeting a preset isolation requirement, where the method includes:
the switch module comprises a multi-pole multi-throw switch;
the switch module includes switch input and switch output, the switch input gate first isolation control module, the signal of first frequency channel is received to first isolation control module, the signal of second frequency channel is received to second isolation control module, the switch input is received the signal after the first decay of first frequency channel with the signal after the second decay of second frequency channel, the signal after first decay and the second decay that the switch output satisfies preset isolation degree requirement are exported.
The method for improving the radio frequency isolation provided by the embodiment of the invention comprises the following steps: setting an isolation control module; inputting a signal of a first frequency band to a first isolation control module, and starting a radio frequency channel corresponding to the first isolation control module; setting the first isolation control module to a minimum loss mode; setting a loss value of a second isolation control module, and acquiring the port isolation degree of the first isolation control module and the second isolation control module, wherein the sum of the port isolation degree and the loss value is greater than a preset isolation value.
Optionally, in some embodiments of the present invention, the setting an isolation control module includes:
presetting a frequency band list corresponding to the isolation control module;
and selecting the isolation control module corresponding to the frequency band combination according to the frequency band combination.
Optionally, in some embodiments of the present invention, the setting an isolation control module includes:
the isolation control module includes an attenuation network or a filter network.
Optionally, in some embodiments of the present invention, the setting an isolation control module includes:
the isolation control module is connected with a switch module, the switch module comprises a switch input end and a switch output end, the switch input end gates the first isolation control module, the switch input end receives the first attenuated signal of the first frequency band, and the switch output end outputs the first attenuated signal meeting the requirement of preset isolation;
the switch module includes a multi-pole, multi-throw switch.
Optionally, in some embodiments of the present invention, the setting the first isolation control module to the minimum loss mode includes:
presetting a minimum loss mode list corresponding to a frequency band;
and selecting a corresponding minimum loss mode according to the frequency band.
The embodiment of the invention provides a circuit, a method and a mobile terminal for improving radio frequency isolation, wherein the circuit comprises: the switch module comprises at least two isolation control modules; the isolation control module receives signals of a plurality of frequency bands and is used for outputting attenuated signals; the switch module is connected with the isolation control module and used for gating a radio frequency channel according to a received frequency band, the radio frequency channel corresponds to the isolation control module corresponding to the received frequency band and outputs the signal meeting the requirement of preset isolation. The scheme improves the radio frequency isolation, and the space which can be saved is realized by combining frequency bands according to requirements, and the more the combination is, the more the space is saved relatively.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a conventional method for increasing isolation in a terminal design according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a circuit structure for improving radio frequency isolation according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another circuit structure for improving RF isolation according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an isolation control module according to an embodiment of the present invention;
fig. 5 is a schematic flowchart of an isolation control method according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a circuit and a method for improving radio frequency isolation and a mobile terminal. The mobile terminal of the embodiment of the invention can be a mobile phone, a tablet computer, a notebook computer and other equipment. The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.
The embodiment of the invention provides a circuit for improving radio frequency isolation, as shown in fig. 2, the circuit includes a switch module 201 and an isolation control module 202; the isolation control module 201 receives signals of multiple frequency bands and is used for outputting attenuated signals; the switch module 201 is connected with the isolation control module 202 and used for gating a radio frequency path according to a received frequency band, the radio frequency path corresponds to the isolation control module corresponding to the received frequency band and outputs a signal meeting a preset isolation requirement, the signal is input from an input end 203 of the isolation control module, passes through an output end 204 of the isolation control module and then is output through a switch output end 205 through the switch module 201. The circuit for improving the radio frequency isolation degree is at least provided with two isolation control modules.
The isolation control module in the embodiment of the present invention operates in an endec mode or an UL CA mode, and the isolation control module is selectively configured according to different endec combinations and CA combinations, for example, when two frequency band combinations of 2CA or endec are configured, only two modules are required to be configured therein, and for example, when three frequency band combinations of 3CA or endec are configured, only three modules are required to implement the required isolation. The arrangement of the module does not need to consider the problem of insufficient isolation of a single device.
The switch module comprises a multi-pole multi-throw switch, and the multi-pole multi-throw switch is selected to be closed according to the number of the set isolation control modules and the purpose of the output signal. The switch module is used for selectively starting a radio frequency channel where the isolation control module is located. The switch module comprises a switch input end and a switch output end, the switch input end is used for gating the corresponding radio frequency channel according to the received frequency band, and the switch module output end is used for outputting the attenuated signal meeting the requirement of the preset isolation degree. The switch input end gates the first isolation control module, the second isolation control module is set to a required attenuation value at the moment, the first isolation control module receives a signal of a first frequency band, the switch input end receives a first attenuated signal of the first frequency band, and the switch output end outputs the first attenuated signal meeting the preset isolation requirement. Since the first isolation control module is gated and set to the minimum loss mode, the attenuation of the first attenuated signal passing through the first isolation control module is very small. As shown in fig. 2, the multiple pole, multiple throw switch 201 includes a plurality of switch outputs 204. The multiple branches of the switch output end 205 may simultaneously output multiple frequency band attenuated signals that satisfy the isolation degree via the isolation control module.
In some embodiments, the switch module may also be configured as a single-pole multi-throw switch, and the output signals meeting the isolation requirement are output at the same output terminal. Taking the terminal power detection circuit as an example, the circuit shown in fig. 3 is used for power detection. As shown in fig. 3, the circuit includes a switch module 301 and an isolation control module 302, the switch module 301 is connected to the isolation control module 302, and a signal is input from an input terminal 303 of the isolation control module, passes through an output terminal 304 of the isolation control module, passes through the switch module 301, and is output through a switch output terminal 305. The switch module is a single-pole multi-throw switch and only has one output end 305, the switch module gates the first isolation control module, the signal of the first frequency band is output through the switch output end, the switch module gates the second isolation control module, the signal of the second frequency band is output through the switch output end, and the signal of the first frequency band and the signal of the second frequency band are output at the switch output end in a time-sharing mode. When the switch module gates the first isolation control module, the second isolation control module is in a state of being disconnected from the switch module, and the preset isolation requirement is met through the setting of the second isolation control module, so that the signal passing through the first frequency band cannot leak to a second channel where the second isolation control module is located when passing through the switch.
The internal structure of the isolation control module comprises multiple implementation forms, an attenuator or an attenuation network can be arranged in the isolation control module, different attenuation values can be set according to the frequency range of a frequency band, the attenuation values can be defined according to the requirements of a platform or the application scene, and the insertion loss and the suppression can be set according to the frequency range in use in the form of a filter network. Selecting a first isolation control module and a second isolation control module, setting the first isolation control module to be in a minimum loss mode, setting a loss value of the second isolation control module, and acquiring the port isolation of the first isolation control module and the second isolation control module, wherein the sum of the port isolation and the loss value is greater than a preset isolation value.
The isolation control module can be a network formed by capacitors and inductors, a node is arranged between every two adjacent capacitors and used for connecting the capacitors in series, one end of each inductor is connected with the node, and the other end of each inductor is grounded. Fig. 4 is a circuit schematic diagram of an isolation control module, as shown in fig. 4, including a capacitor 401 and an inductor 402, three capacitors C1, C2 and C3 connected in series, one end of the inductor L1 is grounded, the other end is connected between the capacitors C1 and C2, one end of the inductor L2 is grounded, and the other end is connected between the capacitors C2 and C3.
In the embodiment of the present invention, a terminal power detection circuit is taken as an example, and a first isolation control module and a second isolation control module are selectively configured, where the first isolation control module corresponds to a first frequency band of 2100MHz, circuit structures of the first isolation control module and the second isolation control module are both as shown in fig. 4, in the first isolation control module, C1 ═ C2 ═ C3 ═ 12PF, L1 ═ L2 ═ 22nH, and in the second isolation control module, C1 ═ 1.5PF, C2 ═ 0.7PF, C3 ═ 0.8PF, L1 ═ 2.2nH, and L2 ═ 1.9 nH. The first isolation control module firstly performs power detection of a first frequency band, namely, under the work of 2100MHz, a signal is input from the input end of the first isolation control module, the switch module starts a radio frequency path where the first isolation control module is located, 2100MHz is straight-through in the first isolation control module, namely, is in a minimum loss mode, and meanwhile, for the second isolation control module, the attenuation value is 20 dB. At this time, the isolation between the first isolation control module and the second isolation control module is the sum of the attenuation value and the originally existing port isolation of the two modules connected with the switch module, and is greater than the set isolation value, that is, the isolation requirement required by the first frequency band operation is met. After the signal detection of the first frequency band is completed, the switch module is switched to the second isolation control module, power detection is carried out on the frequency band corresponding to the second isolation control module, the second isolation control module is set to be in a minimum loss mode, and other isolation control modules are set to be required attenuation values. In the embodiment of the invention, when working in different frequency bands, the radio frequency control module corresponding to the frequency band is set to be in a minimum loss mode, and other radio frequency control modules are set to be required attenuation values, so that the isolation degree required by the working of a plurality of frequency bands is realized, namely, the isolation control module corresponding to the frequency band of the currently working signal is used as a first isolation control module, and any other isolation control module can be used as a second isolation control module, and is set corresponding to the circuit setting method, so that the output frequency band signal meets the requirement of preset isolation degree. Different frequency bands correspond to different preset isolation requirements, so that the respective normal working states of the frequency bands are ensured when the frequency bands work.
The embodiment of the invention is suitable for a plurality of circuit design modules, such as a circuit with a transmitting power detection part, wherein one path or a plurality of paths of the FBRX can be flexibly switched to increase the isolation requirement between frequency bands. The invention can also be used on a front-end circuit, is suitable for CA combination with more ENDCs and more carriers along with the increase of the speed requirement of a user on a terminal, has more obvious advantages, can realize the isolation requirement only by distributing the combined frequency band in different module groups, and can more flexibly and compatibly support the combined work of multiple frequency bands. This scheme adopts integrated scheme, walks the line and can not increase along with the increase of combination, reduces to walk line pressure.
The embodiment of the invention provides a method for improving radio frequency isolation, which comprises the following steps: setting an isolation control module; inputting a signal of a first frequency band to a first isolation control module, and starting a radio frequency channel corresponding to the first isolation control module; setting the first isolation control module to a minimum loss mode; setting a loss value of a second isolation control module, and acquiring the port isolation degree of the first isolation control module and the second isolation control module, wherein the sum of the port isolation degree and the loss value is greater than a preset isolation value.
As shown in fig. 5, a specific process of the method for improving the radio frequency isolation may be as follows:
101. and setting an isolation control module.
For example, in the endec mode or the UL CA mode, the multiband operation may require higher isolation between bands to ensure their respective normal operating states. And selecting and setting a plurality of isolation control modules according to the working frequency band combination.
The method comprises the steps of presetting a frequency band list corresponding to an isolation control module, enabling each isolation control module to correspond to different frequency band ranges, and selecting and setting the corresponding isolation control module according to different frequency band combinations. The isolation control module can be set as an attenuation network or a filter network, and the parameters of the circuit network are set according to the corresponding frequency band range.
102. And inputting a signal of a first frequency band to the first isolation control module, and starting a radio frequency channel corresponding to the first isolation control module.
For example, in the embodiment of the present invention, taking the terminal power detection circuit as an example, the first isolation control module corresponds to a first frequency band, the second isolation control module corresponds to a second frequency band, the power detection of the first frequency band is performed first, a first frequency band signal is input to the first isolation control module, and a radio frequency path where the first isolation control module is located is opened.
The isolation control module is connected with the switch module, the switch module comprises a multi-pole multi-throw switch, and the closing of the multi-pole multi-throw switch is determined according to the number of the isolation control modules and the purpose of the output signal. After the signal is input to the first isolation module, the switch module is switched to the output end of the first isolation module, and the radio frequency channel where the switch module is located is opened.
103. Setting the first isolation control module to a minimum loss mode.
For example, after a signal of a first frequency band is input to the first isolation module, the first isolation control module is set to a minimum loss mode.
The switch module comprises a switch input end and a switch output end, the switch input end gates the first isolation control module, the switch input end receives the first attenuated signals of the first frequency band, and the switch output end outputs the first attenuated signals meeting the preset isolation requirement.
The loss value is changed according to the implementation circuit in the isolation control module, the hardware loss of the implementation circuit is basically considered, and different loss values exist for different frequency bands due to different settings of circuit parameters. The minimum loss mode in the embodiment of the present invention may be a signal through, or may be set to a minimum loss value that can be achieved.
The minimum loss mode list corresponding to the preset frequency band selects the corresponding minimum loss mode according to different frequency bands, namely, when the isolation control module is set, different parameters are set for circuits in the isolation control module according to the corresponding frequency bands.
104. Setting a loss value of a second isolation control module, and acquiring the port isolation degree of the first isolation control module and the second isolation control module, wherein the sum of the port isolation degree and the loss value is greater than a preset isolation value.
For example, when the first isolation control module is set, the loss value of the second isolation control module is set, and the port isolation degree existing between the first isolation control module and the second isolation control module is obtained, at this time, the isolation degree between the first isolation control module and the second isolation control module is the sum of the loss value and the port isolation degree, and is greater than the preset isolation value, so that the preset isolation requirement is met. The requirement of isolation degree is met, namely when the first frequency band works, the sum of the port isolation degree of the two modules and the loss value set by the second isolation control module is larger than the preset isolation value.
After the signal detection of the first frequency band is completed, the switch module is switched to the second isolation control module, power detection is performed on the frequency band corresponding to the second isolation control module, the radio frequency channel corresponding to the second isolation control module is started, the second isolation control module is set to be in a minimum loss mode, and other modules are set to be required attenuation values.
In the embodiment of the present invention, the method for improving radio frequency isolation is applied to a combination of at least two frequency bands. If the two frequency bands work simultaneously, two radio frequency control modules are configured to respectively correspond to the two frequency bands, for example, a first radio frequency control module corresponds to a first frequency band, and a second radio frequency control module corresponds to a second frequency band; when the first frequency band works, the switch is switched to a radio frequency channel where the first radio frequency control module is located, the first radio frequency control module is set to be in a minimum loss mode, the second radio frequency control module is set to be in a required attenuation value, and isolation required by working of the two frequency bands is achieved. If the three frequency bands work simultaneously, three radio frequency control modules are configured to respectively correspond to the three frequency bands, for example, a first radio frequency control module corresponds to a first frequency band, a second radio frequency control module corresponds to a second frequency band, and a third radio frequency control module corresponds to a third frequency band; when the first frequency band works, the switch is switched to a radio frequency channel where the first radio frequency control module is located, the first radio frequency control module is set to be in a minimum loss mode, and the second radio frequency control module is set to be a required attenuation value; when the second frequency band works, the switch is switched to a radio frequency channel where the second radio frequency control module is located, the second radio frequency control module is set to be in a minimum loss mode, the third radio frequency control module is set to be in a required loss value, and isolation required by working of the three frequency bands is achieved. By analogy, if under the condition that a plurality of frequency bands work simultaneously, a plurality of radio frequency control modules are correspondingly configured and respectively correspond to the plurality of frequency bands, when the radio frequency control modules work in different frequency bands, the radio frequency control modules corresponding to the frequency bands are set to be in a minimum loss mode, and other radio frequency control modules are set to be required attenuation values, so that the isolation required by the work of the plurality of frequency bands is realized.
The terms "first," "second," and the like in the description and in the claims, and in the drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. That is, in the embodiment of the present invention, any frequency band may be used as the first frequency band, and is set to the minimum loss mode corresponding to the first isolation control module.
Accordingly, an embodiment of the present invention further provides a terminal, as shown in fig. 6, the terminal may include Radio Frequency (RF) circuit 601, a memory 602 including one or more computer-readable storage media, an input unit 603, a display unit 604, a sensor 605, an audio circuit 606, a Wireless Fidelity (WiFi) module 607, a processor 608 including one or more processing cores, and a power supply 609. Those skilled in the art will appreciate that the terminal structure shown in fig. 6 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components. Wherein:
the RF circuit 601 may be used for receiving and transmitting signals during a message transmission or communication process, and in particular, for receiving downlink messages from a base station and then processing the received downlink messages by one or more processors 608; in addition, data relating to uplink is transmitted to the base station. In general, the RF circuit 601 includes, but is not limited to, an antenna, at least one Amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM) card, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuit 601 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Message Service (SMS), and the like.
The memory 602 may be used to store software programs and modules, and the processor 608 executes various functional applications and data processing by operating the software programs and modules stored in the memory 602. The memory 602 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the mobile terminal, and the like. Further, the memory 602 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory 602 may also include a memory controller to provide the processor 608 and the input unit 603 access to the memory 602. In the embodiment of the present invention, the memory 602 is configured to store a frequency band list corresponding to the isolation control module and a minimum loss pattern corresponding to a frequency band.
The input unit 603 may be used to receive input numeric or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, in one particular embodiment, input unit 603 may include a touch-sensitive surface as well as other input devices. The touch-sensitive surface, also referred to as a touch display screen or a touch pad, may collect touch operations by a user (such as operations by the user on or near the touch-sensitive surface using a finger, a stylus, or any other suitable object or attachment) thereon or nearby, and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface may comprise two parts, a touch detection means and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 608, and can receive and execute commands sent by the processor 608. In addition, touch sensitive surfaces may be implemented using various types of resistive, capacitive, infrared, and surface acoustic waves. The input unit 603 may include other input devices in addition to the touch-sensitive surface. In particular, other input devices may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.
The display unit 604 may be used to display information input by or provided to the user and various graphical user interfaces of the terminal, which may be made up of graphics, text, icons, video, and any combination thereof. The Display unit 604 may include a Display panel, and optionally, the Display panel may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. Further, the touch-sensitive surface may overlay the display panel, and when a touch operation is detected on or near the touch-sensitive surface, the touch operation is transmitted to the processor 608 to determine the type of touch event, and the processor 608 then provides a corresponding visual output on the display panel according to the type of touch event. Although in FIG. 6 the touch-sensitive surface and the display panel are two separate components to implement input and output functions, in some embodiments the touch-sensitive surface may be integrated with the display panel to implement input and output functions.
The terminal may also include at least one sensor 605, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel according to the brightness of ambient light, and a proximity sensor that may turn off the display panel and/or the backlight when the terminal is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured in the terminal, detailed description is omitted here.
WiFi belongs to short distance wireless transmission technology, and the mobile terminal can help the user to send and receive e-mail, browse web page and access streaming media etc. through WiFi module 607, it provides wireless broadband internet access for the user. Although fig. 6 shows the WiFi module 607, it is understood that it does not belong to the essential constitution of the terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.
The processor 608 is a control center of the terminal, connects various parts of the entire handset using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 602 and calling data stored in the memory 602, thereby performing overall monitoring of the handset. Optionally, processor 608 may include one or more processing cores; preferably, the processor 608 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 608.
The terminal also includes a power supply 609 (e.g., a battery) for powering the various components, which may preferably be logically connected to the processor 608 via a power management system that may be used to manage charging, discharging, and power consumption. The power supply 609 may also include any component of one or more dc or ac power sources, recharging systems, power failure detection circuitry, power converters or inverters, power status indicators, and the like.
Although not shown, the terminal may further include a camera, a bluetooth module, and the like, which will not be described herein. Specifically, in this embodiment, the processor 608 in the terminal loads the executable file corresponding to the process of one or more application programs into the memory 602 according to the following instructions, and the processor 608 runs the application programs stored in the memory 602, thereby implementing various functions:
setting an isolation control module;
inputting a signal of a first frequency band to a first isolation control module, and starting a radio frequency channel corresponding to the first isolation control module;
setting the first isolation control module to a minimum loss mode;
setting a loss value of a second isolation control module, and acquiring the port isolation degree of the first isolation control module and the second isolation control module, wherein the sum of the port isolation degree and the loss value is greater than a preset isolation value.
The circuit, the method and the mobile terminal for improving the radio frequency isolation provided by the embodiment of the invention are described in detail, a specific embodiment is applied in the description to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (9)
1. A circuit for improving radio frequency isolation, comprising:
the switch module comprises at least two isolation control modules;
the isolation control module receives signals of a plurality of frequency bands and is used for outputting attenuated signals;
the switch module is connected with the isolation control module and used for gating a radio frequency channel according to a received frequency band, the radio frequency channel corresponds to the isolation control module corresponding to the received frequency band and outputting a signal meeting the requirement of preset isolation; setting a first isolation control module to be in a minimum loss mode; setting a loss value of a second isolation control module, and acquiring the port isolation degree of the first isolation control module and the second isolation control module, wherein the sum of the port isolation degree and the loss value is greater than a preset isolation value.
2. The circuit for improving radio frequency isolation according to claim 1, wherein the isolation control module receives signals of a plurality of frequency bands, and outputs an attenuated signal, comprising:
the isolation control module includes an attenuation network or a filter network.
3. The circuit for improving radio frequency isolation according to claim 2, wherein the isolation control module receives signals of a plurality of frequency bands, and outputs an attenuated signal, comprising:
a capacitor, an inductor;
a node is arranged between adjacent capacitors and used for connecting the capacitors in series, one end of the inductor is connected with the node, and the other end of the inductor is grounded.
4. The circuit for improving radio frequency isolation according to claim 1, wherein the switch module is connected to the isolation control module, and configured to gate a radio frequency path according to a received frequency band, where the radio frequency path corresponds to the isolation control module corresponding to the received frequency band, and output a signal meeting a preset isolation requirement, and the circuit comprises:
the switch module comprises a multi-pole multi-throw switch;
the switch module includes switch input and switch output, the switch input gate first isolation control module, the signal of first frequency channel is received to first isolation control module, the signal of second frequency channel is received to second isolation control module, the switch input is received the signal after the first decay of first frequency channel with the signal after the second decay of second frequency channel, the signal after first decay and the second decay that the switch output satisfies preset isolation degree requirement are exported.
5. A method for improving radio frequency isolation, comprising:
setting an isolation control module;
inputting a signal of a first frequency band to a first isolation control module, and starting a radio frequency channel corresponding to the first isolation control module;
setting the first isolation control module to a minimum loss mode;
setting a loss value of a second isolation control module, and acquiring port isolation of the first isolation control module and the second isolation control module, wherein the sum of the port isolation and the loss value is greater than a preset isolation value.
6. The method for improving radio frequency isolation according to claim 5, wherein the setting of the isolation control module includes:
presetting a frequency band list corresponding to the isolation control module;
and selecting the isolation control module corresponding to the frequency band combination according to the frequency band combination.
7. The method for improving radio frequency isolation according to claim 5, wherein the setting of the isolation control module comprises:
the isolation control module includes an attenuation network or a filter network.
8. The method of claim 5, wherein the setting the first isolation control module to a minimum loss mode comprises:
the isolation control module is connected with a switch module, the switch module comprises a switch input end and a switch output end, the switch input end gates the first isolation control module, the switch input end receives the first attenuated signal of the first frequency band, and the switch output end outputs the first attenuated signal meeting the requirement of preset isolation;
the switch module includes a multi-pole, multi-throw switch.
9. The method of claim 5, wherein the setting the first isolation control module to a minimum loss mode comprises:
presetting a minimum loss mode list corresponding to a frequency band;
and selecting a corresponding minimum loss mode according to the frequency band.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010053131A1 (en) * | 2008-11-05 | 2010-05-14 | 日立金属株式会社 | High-frequency circuit, high-frequency part, and multiband communication device |
| CN102404879A (en) * | 2011-11-04 | 2012-04-04 | 惠州Tcl移动通信有限公司 | Mobile communication terminal |
| CN103475386A (en) * | 2013-09-25 | 2013-12-25 | 小米科技有限责任公司 | Radio frequency front end terminal and terminal equipment |
| CN210839537U (en) * | 2019-11-22 | 2020-06-23 | 深圳市泰衡诺科技有限公司 | Split circuit and multi-band communication equipment |
| CN111917429A (en) * | 2020-07-24 | 2020-11-10 | 锐石创芯（深圳）科技有限公司 | Radio frequency front end architecture, antenna device and communication terminal |
-
2020
- 2020-12-08 CN CN202011444849.XA patent/CN112615630B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010053131A1 (en) * | 2008-11-05 | 2010-05-14 | 日立金属株式会社 | High-frequency circuit, high-frequency part, and multiband communication device |
| CN102404879A (en) * | 2011-11-04 | 2012-04-04 | 惠州Tcl移动通信有限公司 | Mobile communication terminal |
| CN103475386A (en) * | 2013-09-25 | 2013-12-25 | 小米科技有限责任公司 | Radio frequency front end terminal and terminal equipment |
| CN210839537U (en) * | 2019-11-22 | 2020-06-23 | 深圳市泰衡诺科技有限公司 | Split circuit and multi-band communication equipment |
| CN111917429A (en) * | 2020-07-24 | 2020-11-10 | 锐石创芯（深圳）科技有限公司 | Radio frequency front end architecture, antenna device and communication terminal |
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