CN109361415B - Harmonic suppression method of radio frequency receiving and transmitting unit, radio frequency receiving and transmitting unit and terminal equipment - Google Patents
Harmonic suppression method of radio frequency receiving and transmitting unit, radio frequency receiving and transmitting unit and terminal equipment Download PDFInfo
- Publication number
- CN109361415B CN109361415B CN201811467206.XA CN201811467206A CN109361415B CN 109361415 B CN109361415 B CN 109361415B CN 201811467206 A CN201811467206 A CN 201811467206A CN 109361415 B CN109361415 B CN 109361415B
- Authority
- CN
- China
- Prior art keywords
- switch
- antenna
- radio frequency
- link
- combining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000001629 suppression Effects 0.000 title claims abstract description 11
- 238000001914 filtration Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 abstract description 25
- 230000005540 biological transmission Effects 0.000 description 24
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
- H04B1/1036—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters
-
- 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
- H04B1/0053—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 with common antenna for more than one band
- H04B1/0057—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 with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
-
- 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
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
-
- 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
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
-
- 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
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/163—Special arrangements for the reduction of the damping of resonant circuits of receivers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
Abstract
The invention discloses a harmonic suppression method of a radio frequency transceiver unit, the radio frequency transceiver unit and terminal equipment, wherein the radio frequency transceiver unit comprises: the device comprises a power amplifier, a shunt switch, a combining switch, at least two transmitting filter links, an antenna switch and a receiving link; the at least two emission filter links are connected in parallel between the shunt switch and the combining switch, each emission filter link comprises at least one emission filter, and the working frequency band of each emission filter link is different; the power amplifier is connected with the shunt switch, the combining switch is connected with the antenna switch, and the antenna switch is also connected with the receiving link. The invention discloses a harmonic suppression method of a radio frequency receiving and transmitting unit, the radio frequency receiving and transmitting unit and terminal equipment, which are used for suppressing higher harmonic waves in broadband wireless communication.
Description
Technical Field
The embodiment of the invention relates to a wireless communication technology, in particular to a harmonic suppression method of a radio frequency receiving and transmitting unit, the radio frequency receiving and transmitting unit and terminal equipment.
Background
With the development of wireless communication technology, the wireless communication demands of terminal devices are increasing, wherein in order to increase the wireless communication data transmission speed of the terminal devices, the terminal devices are required to support wider communication bandwidths.
In conventional terminal devices, a wireless communication signal to be transmitted by the terminal device needs to be transmitted after passing through an amplifier, a transmission filter, an antenna switch and an antenna in order. However, when the working bandwidth is wider, in the wireless signals transmitted by the terminal device, higher harmonics of lower frequency signals may fall within the working bandwidth at the same time, and it is difficult for a broadband transmitting filter to effectively suppress the higher harmonics.
In the prior art, in order to solve the above-mentioned problem, only a plurality of narrowband radio frequency transceiver units can be designed, so as to splice a broadband wireless communication system for a terminal device. However, the multiple radio frequency transceiver units increase the cost of the terminal device, and in addition, the multiple radio frequency transceiver units also occupy limited space in the terminal device, which is not beneficial to the design of lightening and thinning the terminal device.
Disclosure of Invention
The invention provides a harmonic suppression method of a radio frequency receiving and transmitting unit, the radio frequency receiving and transmitting unit and terminal equipment, which are used for suppressing higher harmonic waves in broadband wireless communication.
In a first aspect, an embodiment of the present invention provides a radio frequency transceiver unit, including:
the device comprises a power amplifier, a shunt switch, a combining switch, at least two transmitting filter links, an antenna switch and a receiving link;
the at least two emission filter links are connected in parallel between the shunt switch and the combining switch, each emission filter link comprises at least one emission filter, and the working frequency band of each emission filter link is different;
the power amplifier is connected with the shunt switch, the combining switch is connected with the antenna switch, and the antenna switch is also connected with the receiving link;
the power amplifier is used for amplifying the wireless signals to be transmitted, the shunt switch and the combining switch are used for being connected with different transmitting filter links according to the transmitting control instruction, so that the wireless signals to be transmitted are output to the antenna switch through the shunt switch after being amplified by the power amplifier, and the frequency of the wireless signals to be transmitted is in the working frequency range of the transmitting filter link connected with the shunt switch and the combining switch;
the antenna switch is used for being connected with the combining switch according to the emission control instruction, and the wireless signal to be transmitted, which is input by the combining switch, is emitted through an antenna connected with the antenna switch.
In a possible implementation manner of the first aspect, the antenna switch is further configured to connect to the receiving link according to the receiving control instruction when the antenna connected to the antenna switch receives the wireless signal to be received;
the shunt switch and the combiner switch are further configured to close a connection with at least one transmit filter link according to the received control instruction.
In a possible implementation manner of the first aspect, the shunt switch and the combiner switch are specifically configured to close the connection with the at least one transmit filter link within a preset time after receiving the receiving control instruction.
In a possible implementation manner of the first aspect, the receiving chain includes a receiving filter and a low noise amplifier, and the antenna switch is a circulator.
In a possible implementation manner of the first aspect, the number of interfaces of the shunt switch and the combining switch is greater than the number of at least two transmit filter links.
In a possible implementation manner of the first aspect, each transmit filter chain includes at least two transmit filters.
In a second aspect, an embodiment of the present invention further provides a terminal device, including: the terminal equipment comprises a terminal equipment main body, a radio frequency transceiver unit and an antenna;
the radio frequency transceiver unit and the antenna are arranged in the main body of the terminal equipment,
the wireless signal to be transmitted, which is generated by the terminal equipment main body, is transmitted after passing through the radio frequency transceiver unit and the antenna, and the wireless signal received by the antenna is transmitted to the terminal equipment main body through the radio frequency transceiver unit;
the radio frequency transceiver unit comprises a radio frequency transceiver unit as in any one of the possible implementations of the first aspect.
In a third aspect, an embodiment of the present invention further provides a method for suppressing harmonics of a radio frequency transceiver unit, applied to the radio frequency transceiver unit, where the radio frequency transceiver unit includes:
the device comprises a power amplifier, a shunt switch, a combining switch, at least two transmitting filter links, an antenna switch and a receiving link;
the at least two emission filter links are connected in parallel between the shunt switch and the combining switch, each emission filter link comprises at least one emission filter, and the working frequency band of each emission filter link is different;
the power amplifier is connected with the shunt switch, and the antenna switch is respectively connected with the combining switch and the receiving link;
the method comprises the following steps:
determining the frequency band of the wireless signal to be transmitted according to the frequency of the wireless signal to be transmitted;
the shunt switch and the combining switch are controlled to be opened to an emission filtering link corresponding to the frequency band where the wireless signal to be sent is located, and the antenna switch is switched to be connected with the combining switch, so that the wireless signal to be sent is emitted through the power amplifier, the shunt switch, the emission filtering link corresponding to the frequency band where the wireless signal to be sent is located, the combining switch and the antenna switch and then through an antenna connected with the antenna switch.
In a possible implementation manner of the third aspect, the method further includes:
when the antenna connected with the antenna switch receives a wireless signal, the antenna switch is controlled to be connected with a receiving link, and the shunt switch and the combining switch are controlled to be closed.
In a possible implementation manner of the third aspect, when the antenna connected to the antenna switch receives a wireless signal, controlling the antenna switch to be connected to the receiving link, and controlling the shunt switch and the combining switch to be turned off includes:
when the antenna connected with the antenna switch receives a wireless signal, the antenna switch is controlled to be connected with a receiving link, and the shunt switch and the combining switch are controlled to be closed within preset time.
According to the harmonic suppression method of the radio frequency receiving and transmitting unit, the radio frequency receiving and transmitting unit and the terminal equipment, the shunt switch, the combining switch and the at least two transmitting filter links are designed at the transmitting end, so that the radio frequency receiving and transmitting unit can select different transmitting filter links for radio signals to be transmitted with different frequencies divided by broadband to carry out filtering treatment, and the radio signals to be transmitted with different frequencies are combined to restore broadband radio signals transmitted by the band, so that the influence of higher harmonic waves on the radio signals due to wider working bandwidth is avoided, the scheme cost is low compared with the scheme that a plurality of narrow band modules are adopted to splice a broadband system for suppressing the higher harmonic waves in the prior art, the assembling modules are few, and the influence on the terminal equipment system applying the radio frequency receiving and transmitting unit is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a radio frequency unit in a terminal device;
fig. 2 is a schematic structural diagram of a first embodiment of a radio frequency transceiver unit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a second embodiment of a radio frequency transceiver unit according to the present invention;
fig. 4 is a schematic structural diagram of a first embodiment of a terminal device according to an embodiment of the present invention;
fig. 5 is a flowchart of a first embodiment of a method for suppressing harmonics of a radio frequency transceiver unit according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In order to realize two-way communication, the radio frequency units of the terminal equipment need to be duplex, that is to say, the terminal equipment needs to support the transmission and the reception of wireless signals simultaneously. An antenna switch or a circulator is generally adopted in terminal equipment as an isolation device for transmitting and receiving, and wireless signals of a frequency band in the same wireless communication system are transmitted and received through the same antenna. The radio frequency unit is used as a receiving and transmitting access port for wireless signals in the terminal equipment, and the performance of the radio frequency unit has great influence on the wireless communication capability of the terminal equipment.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a radio frequency unit in a terminal device, where a power amplifier 12 in a radio frequency unit 11 is connected to a filter 13, the filter 13 is connected to an antenna switch 14, and the antenna switch 14 is further connected to an antenna 15 and a receiving link 16. In order to achieve wireless communication, a terminal device needs to have a capability of generating a wireless signal, which is generally implemented by means of a baseband unit in the terminal device. The baseband units of different wireless communication systems can generate intermediate frequency signals of corresponding wireless communication systems, and after frequency conversion of the frequency conversion unit, the wireless signals to be transmitted are transmitted to the radio frequency unit 11. The power amplifier 12 in the radio frequency unit 11 amplifies the radio signal to be transmitted, filters the radio signal by the filter 13, and transmits the radio signal by the antenna switch 14 and the antenna 15. The wireless signal received by the antenna 15 is transmitted to the receiving link 16 through the antenna switch 14, and the receiving link 16 processes the wireless signal and then transmits the wireless signal to the baseband unit for subsequent processing after frequency conversion by the frequency conversion unit. The receiving link generally comprises a receiving filter, a low noise amplifier and other devices, and the specific structure and processing method can adopt any structure and method in the prior art. The invention aims at the improvement of the radio frequency unit on the transmitting end of the wireless signal, so the specific structure and the processing method of the receiving end are not described in detail. It should be noted that the antenna switch 14 may also be implemented by a circulator.
For the transmitting end of the rf unit 11, since in the conventional terminal device, a transmitting link, that is, a serial link, is adopted, the operating frequency band of the filter 13 covers all the operating frequency bands required by the rf unit 11. For the conventional wireless communication system, the performance of the filter 13 can meet the requirements due to the relatively narrow operating frequency band. However, with the development of wireless communication technology, in order to adapt to more complex and variable application scenarios, the requirement on the radio frequency bandwidth is wider and wider, and with the increase of the working frequency band, the higher harmonic of the low frequency signal in the working frequency band will be in the working frequency band, so that the single filter 13 cannot filter the higher harmonic. For example, for a wireless communication system with an operating frequency range of 300MHz-700MHz, the second harmonic generated by the 300MHz signal during frequency conversion will be around 600MHz and will be within the operating frequency range.
In the prior art, in order to solve the above-mentioned problem of higher harmonics, only a plurality of narrowband radio frequency transceiver units can be designed for the terminal device, but this obviously increases the cost. In addition, a plurality of independent radio frequency transceiver units occupy limited space in the terminal equipment, and the addition of the radio frequency transceiver units brings unpredictable risks and instability to the whole terminal equipment system, and is not beneficial to the expansion of bandwidth.
Fig. 2 is a schematic structural diagram of a first embodiment of a radio frequency transceiver unit provided in an embodiment of the present invention, as shown in fig. 2, where the radio frequency transceiver unit provided in the embodiment includes:
a power amplifier 21, a shunt switch 22, a combining switch 23, a transmit filter link 24, a transmit filter link 25, a transmit filter link 26, an antenna switch 27, and a receive link 28. In this embodiment, three transmit filter links are taken as an example for illustration, but the number of transmit filter links in the radio frequency transceiver unit provided by the invention is not limited to this, and the number of transmit filter links is only greater than two, i.e. within the protection scope of the invention.
The transmit filter links 24, 25, 26 are connected in parallel between the shunt switch 22 and the combiner switch 23, each transmit filter link comprising at least one transmit filter, in this embodiment, each transmit filter link comprising one transmit filter is illustrated, wherein the transmit filter link 24 comprises a transmit filter 241, the transmit filter link 25 comprises a transmit filter 251, and the transmit filter link 26 comprises a transmit filter 261. The operating frequency bands of the transmit filter link 24, the transmit filter link 25, and the transmit filter link 26 are different, that is, the operating frequency bands of the transmit filters 241, 251, and 261 are different.
The power amplifier 21 is connected to the shunt switch 22, the combining switch 23 is connected to the antenna switch 27, and the antenna switch 27 is also connected to the reception link 28. In this embodiment, the antenna switch 27 and the receiving link 28 are the same as the antenna switch 14 and the receiving link 16 in the embodiment shown in fig. 1, and may be any antenna switch and receiving link in the prior art.
The power amplifier 21 amplifies the wireless signal to be transmitted generated by the baseband unit in the terminal device after being processed and frequency-converted by the frequency conversion unit, and can determine the transmitting filter link corresponding to the wireless signal to be transmitted, that is, the frequency of the wireless signal to be transmitted is in the working frequency band of which transmitting filter link according to the frequency of the wireless signal to be transmitted. After determining the transmitting filter link corresponding to the wireless signal to be transmitted, the control unit in the terminal device may send a transmitting control instruction to the shunt switch 22 and the combining switch 23, so that the shunt switch 22 and the combining switch 23 are connected with the transmitting filter link. For example, the transmission filter link corresponding to the wireless signal to be transmitted is the transmission filter link 24, so that a wireless signal path formed by the power amplifier 21, the shunt switch 22, the transmission filter link 24 and the combining switch 23 is formed. The radio signal to be transmitted amplified by the power amplifier can be transmitted to the antenna switch 27 after being filtered by the transmit filter chain 24. When the terminal equipment transmits the wireless signal, the antenna switch 27 is controlled to be connected with the combining switch 23, so that the amplified wireless signal to be transmitted can be transmitted through the antenna connected with the antenna switch 27, and the transmission of the wireless signal of the terminal equipment is realized.
Still take 300MHz-700MHz as an example of the working frequency band, in the embodiment, the working frequency bands of three transmitting filter units can be separately designed into 300MHz-400MHz, 401MHz-500MHz and 501-700 MHz, so that the second harmonic of the three frequency bands is 600MHz-800MHz, 802MHz-1000MHz and 1002MHz-1400MHz respectively, and each transmitting filter unit can realize good harmonic suppression by adopting narrow-band filters respectively.
In this embodiment, a plurality of transmitting filter links are designed, and the working frequency band of each transmitting filter link is different, so that the working bandwidth of each transmitting filter link can be designed to be relatively narrow, and the wireless signal to be transmitted by the terminal device can be filtered through different transmitting filter links according to the frequency by controlling the shunt switch and the combining switch to be connected with different transmitting filter links, so that the problem that the second harmonic cannot be filtered is avoided. In addition, the operating bandwidth of the multiple transmit filter chains is relatively narrow, and the cost of the transmit filters therein can be controlled. In addition, the radio frequency transceiver unit provided in this embodiment only designs a plurality of transmitting filter links, and is actually a complete radio frequency transceiver unit, so that the influence of a plurality of radio frequency transceiver units on the terminal device system is avoided.
According to the radio frequency receiving and transmitting unit provided by the embodiment, the shunt switch, the combining switch and the at least two transmitting filter links are designed at the transmitting end, so that the radio frequency receiving and transmitting unit can select different transmitting filter links for the radio signals to be transmitted with different frequencies and perform filter processing, and the radio signals to be transmitted with different frequencies are combined to restore the broadband radio signals transmitted with the band, so that the influence of higher harmonics caused by wider working bandwidth on the radio signals is avoided, and compared with the scheme that a plurality of narrow band modules are adopted to splice a broadband system for restraining the higher harmonics in the prior art, the cost of the scheme is low, the number of assembling modules is small, and the influence on a terminal equipment system applying the radio frequency receiving and transmitting unit is avoided.
Fig. 3 is a schematic structural diagram of a second embodiment of a radio frequency transceiver unit according to the present invention, as shown in fig. 3, where, on the basis of fig. 2, the radio frequency transceiver unit provided in the present embodiment specifically includes a receiving filter 281 and a low noise amplifier 282.
In this embodiment, one possible structure is provided for the receive chain 28. Wherein the receiving filter 281 is configured to filter out signals outside the operating bandwidth of the signals received by the antenna. The low noise amplifier 282 amplifies the filtered signal, and then the amplified signal can be transmitted to a frequency conversion unit and a baseband unit of a terminal device to which the radio frequency transceiver unit is applied for subsequent processing.
Alternatively, the number of the transmission filters may be plural in the transmission filter link 24, the transmission filter link 25, and the transmission filter link 26, and in fig. 3, two transmission filters are included in each transmission filter link, that is, the transmission filter link 24 includes the transmission filter 241 and the transmission filter 242, the transmission filter link 25 includes the transmission filter 251 and the transmission filter 252, and the transmission filter 26 includes the transmission filter 261 and the transmission filter 262. And a plurality of emission filters are designed in each emission filtering link, so that the harmonic suppression capability of the emission filtering links can be improved. For example, the harmonic rejection capability of one transmit filter is 30dB, then the harmonic rejection capability of two transmit filters in series is 60dB. The transmitting filter in each transmitting filter chain can be a filter with different inhibition capacities, so that the transmitting filter chains with different inhibition capacities can be formed according to requirements, the requirements of any filtering indexes are met, and the application range of the radio frequency receiving and transmitting unit is improved.
Further, since wireless communication schemes are mainly divided into two types, namely frequency division duplex (Frequency Division Duplexing, FDD) and time division duplex (Time Division Duplexing, TDD), the wireless communication scheme of the TDD scheme is time-division switched between a transmission link and a reception link. In the case of switching between transmission and reception, strict requirements are placed on the guard time slot, for example, 3us, i.e., the time from the completion of transmitting the radio signal to the switching of the antenna switch 27 to the receiving link 28 must not exceed 3us. However, the power amplifier 21 is turned off with a time delay, and it is difficult to completely cut off the signal in such a short time, so that when the receiving link 28 is operated, a part of the residual signal of the power amplifier 21 leaks through the antenna switch 27 and enters the receiving link 28, resulting in a degradation of the receiving quality.
Therefore, in the embodiment of the present invention, the shunt switch 22 and the combining switch 23 may also close the connection with the transmit filter link according to the receive control instruction when the antenna switch 27 is switched to the receive link 28. Because the turn-off speed of the shunt switch 22 and the combiner switch 23 is fast, when the receiving link 28 works, the shunt switch 22 and the combiner switch 23 are turned off, so that the residual signal of the power amplifier 21 can be prevented from leaking to the receiving link 28, that is, the isolation between the receiving and transmitting links in the radio frequency receiving and transmitting unit is improved. Thus, the receiving quality of the radio frequency receiving and transmitting unit can be improved. In addition, in order to further avoid leakage of the residual signal of the power amplifier 21 to the receiving link 28, the shunt switch 22 and the combining switch 23 may close the connection with at least one transmitting filter link within a preset time after receiving the receiving control instruction.
Further, the antenna switch 27 may be in various forms, such as a circulator, a duplexer of various forms, and the like. In the present embodiment, a circulator may be employed as the antenna switch 27. The circulator is a passive device, has lower cost, and can ensure the isolation between the receiving and transmitting ends of the radio frequency receiving and transmitting units by matching with the controllable shunt switch 22 and the combining switch 23.
Further, in the embodiment of the present invention, the number of interfaces of the shunt switch 22 and the combining switch 23 may be greater than the number of transmit filter links. Taking fig. 2 or fig. 3 as an example, the number of transmitting filter links is three, but the number of interfaces of the shunt switch 22 and the combining switch 23 may be greater than three, for example, four or five. This can improve the scalability of the radio frequency transceiver unit. With the development of wireless communication technology, the working bandwidth of the wireless communication system may be further improved, and redundant interfaces are designed for the shunt switch 22 and the combining switch 23, so that when the working bandwidth of the wireless communication system is improved, only a corresponding transmitting filter link needs to be added. Thus, the expandability of the radio frequency transceiver unit is improved, and the cost of system upgrading is reduced.
Fig. 4 is a schematic structural diagram of a first embodiment of a terminal device according to an embodiment of the present invention, and as shown in fig. 4, the terminal device according to this embodiment includes a terminal device main body 41, a radio frequency transceiver unit 42, and an antenna 43.
The radio frequency transceiver unit 42 and the antenna 43 are disposed in the terminal device body 41, and the radio signal to be transmitted generated by the terminal device body 41 is transmitted after passing through the radio frequency transceiver unit 42 and the antenna 43, and the radio signal received by the antenna 43 is transmitted to the terminal device body 41 through the radio frequency transceiver unit 42.
The rf transceiver unit 42 may be the rf transceiver unit shown in fig. 2 or fig. 3. The terminal device body 41 may be configured with different devices according to the functional requirements required for the terminal device, but in order to realize wireless communication, it is necessary to include at least a baseband processing unit and a frequency conversion unit of one wireless communication system. The terminal device body 41 may further include other components such as a housing, an output device such as a display screen and a speaker, and an input device such as a key and a touch device. Various devices in the terminal device main body 41 may be designed according to the prior art, and will not be described in detail in the present invention. The terminal equipment adopting the radio frequency receiving and transmitting unit provided by the embodiment of the invention is within the protection scope of the invention.
Fig. 5 is a flowchart of a first embodiment of a method for suppressing harmonics of a radio frequency transceiver unit according to an embodiment of the present invention, where the method for suppressing harmonics of a radio frequency transceiver unit according to the present embodiment is applied to a radio frequency transceiver unit, and the radio frequency transceiver unit includes: the device comprises a power amplifier, a shunt switch, a combining switch, at least two transmitting filter links, an antenna switch and a receiving link; the at least two emission filter links are connected in parallel between the shunt switch and the combining switch, each emission filter link comprises at least one emission filter, and the working frequency band of each emission filter link is different; the power amplifier is connected with the shunt switch, and the antenna switch is respectively connected with the combining switch and the receiving link.
As shown in fig. 5, the method for suppressing harmonic waves of the radio frequency transceiver unit provided in this embodiment includes:
step S501, determining the frequency band of the wireless signal to be transmitted according to the frequency of the wireless signal to be transmitted.
Step S502, the shunt switch and the combining switch are controlled to be opened to a transmitting filter link corresponding to the frequency band where the wireless signal to be transmitted is located, and the antenna switch is switched to be connected with the combining switch, so that the wireless signal to be transmitted is transmitted through the power amplifier, the shunt switch, the transmitting filter link corresponding to the frequency band where the wireless signal to be transmitted is located, the combining switch and the antenna switch, and then through an antenna connected with the antenna switch.
The harmonic suppression method of the rf transceiver unit provided in this embodiment is used to control the rf transceiver unit shown in fig. 2, and its implementation principle and technical effects have been described in the embodiment shown in fig. 2, which is not described here again.
Further, on the basis of the embodiment shown in fig. 4, the method for suppressing the harmonic of the radio frequency transceiver unit further includes: when the antenna connected with the antenna switch receives a wireless signal, the antenna switch is controlled to be connected with a receiving link, and the shunt switch and the combining switch are controlled to be closed.
Further, when the antenna connected with the antenna switch receives a wireless signal, the antenna switch is controlled to be connected with the receiving link, and the shunt switch and the combining switch are controlled to be closed, which specifically comprises: when the antenna connected with the antenna switch receives a wireless signal, the antenna switch is controlled to be connected with a receiving link, and the shunt switch and the combining switch are controlled to be closed within preset time.
From the above description of embodiments, it will be clear to a person skilled in the art that the present invention may be implemented by means of software and necessary general purpose hardware, but of course also by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, etc., and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments of the present invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (8)
1. A radio frequency transceiver unit comprising:
the device comprises a power amplifier, a shunt switch, a combining switch, at least two transmitting filter links, an antenna switch and a receiving link;
the at least two emission filter links are connected in parallel between the shunt switch and the combining switch, each emission filter link comprises at least one emission filter, and the working frequency band of each emission filter link is different;
wherein the transmit filters in each transmit filter chain are filters with different rejection capabilities; the power amplifier is connected with the shunt switch, the combining switch is connected with the antenna switch, and the antenna switch is also connected with the receiving link;
the power amplifier is used for amplifying a wireless signal to be sent, the shunt switch and the combining switch are used for being connected with different emission filtering links according to emission control instructions, so that the wireless signal to be sent is output to the antenna switch through the shunt switch after being amplified by the power amplifier, wherein the frequency of the wireless signal to be sent is in the working frequency range of the emission filtering link connected with the shunt switch and the combining switch;
the antenna switch is used for being connected with the combining switch according to the emission control instruction, and emitting the wireless signal to be sent, which is input by the combining switch, through an antenna connected with the antenna switch;
the antenna switch is also used for being connected with the receiving link according to a receiving control instruction when an antenna connected with the antenna switch receives a wireless signal to be received;
the shunt switch and the combining switch are also used for closing the connection with the at least one transmitting filter link according to the receiving control instruction;
the shunt switch and the combining switch are specifically configured to close connection with the at least one transmitting filter link within a preset time after receiving the receiving control instruction.
2. The radio frequency transceiver unit of claim 1, wherein the receive chain comprises a receive filter and a low noise amplifier, and the antenna switch is a circulator.
3. The radio frequency transceiver unit of claim 1, wherein the number of interfaces of the shunt switch and the combiner switch is greater than the number of the at least two transmit filter links.
4. The radio frequency transceiver unit of claim 1, wherein each transmit filter chain comprises at least two transmit filters.
5. A terminal device, comprising: the terminal equipment comprises a terminal equipment main body, a radio frequency transceiver unit and an antenna;
the radio frequency transceiver unit and the antenna are arranged in the terminal equipment main body,
the wireless signals to be sent, which are generated by the terminal equipment main body, are transmitted after passing through a radio frequency transceiver unit and the antenna, and the wireless signals received by the antenna are transmitted to the terminal equipment main body through the radio frequency transceiver unit;
the radio frequency transceiver unit comprises a radio frequency transceiver unit according to any one of claims 1-4.
6. A method for harmonic suppression of a radio frequency transceiver unit, applied to the radio frequency transceiver unit, the radio frequency transceiver unit comprising:
the device comprises a power amplifier, a shunt switch, a combining switch, at least two transmitting filter links, an antenna switch and a receiving link;
the at least two emission filter links are connected in parallel between the shunt switch and the combining switch, each emission filter link comprises at least one emission filter, and the working frequency band of each emission filter link is different; wherein the transmit filters in each transmit filter chain are filters with different rejection capabilities;
the power amplifier is connected with the shunt switch, and the antenna switch is respectively connected with the combining switch and the receiving link;
the method comprises the following steps:
determining a frequency band of a wireless signal to be transmitted according to the frequency of the wireless signal to be transmitted;
the shunt switch and the combining switch are controlled to be opened to a transmitting filter link corresponding to a frequency band where the wireless signal to be transmitted is located, and the antenna switch is switched to be connected with the combining switch, so that the wireless signal to be transmitted is transmitted through the power amplifier, the shunt switch, the transmitting filter link corresponding to the frequency band where the wireless signal to be transmitted is located, the combining switch and the antenna switch and then through an antenna connected with the antenna switch;
the antenna switch is also used for being connected with the receiving link according to a receiving control instruction when an antenna connected with the antenna switch receives a wireless signal to be received;
the shunt switch and the combining switch are also used for closing the connection with the at least one transmitting filter link according to the receiving control instruction;
the shunt switch and the combining switch are specifically configured to close connection with the at least one transmitting filter link within a preset time after receiving the receiving control instruction.
7. The method of claim 6, wherein the method further comprises:
when an antenna connected with the antenna switch receives a wireless signal, the antenna switch is controlled to be connected with the receiving link, and the shunt switch and the combining switch are controlled to be closed.
8. The method of claim 7, wherein said controlling the antenna switch to connect with the receive chain and controlling the shunt switch and the combiner switch to close when the antenna connected with the antenna switch receives a wireless signal comprises:
when an antenna connected with the antenna switch receives a wireless signal, the antenna switch is controlled to be connected with the receiving link, and the shunt switch and the combining switch are controlled to be closed within preset time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811467206.XA CN109361415B (en) | 2018-12-03 | 2018-12-03 | Harmonic suppression method of radio frequency receiving and transmitting unit, radio frequency receiving and transmitting unit and terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811467206.XA CN109361415B (en) | 2018-12-03 | 2018-12-03 | Harmonic suppression method of radio frequency receiving and transmitting unit, radio frequency receiving and transmitting unit and terminal equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109361415A CN109361415A (en) | 2019-02-19 |
| CN109361415B true CN109361415B (en) | 2023-12-15 |
Family
ID=65330843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811467206.XA Active CN109361415B (en) | 2018-12-03 | 2018-12-03 | Harmonic suppression method of radio frequency receiving and transmitting unit, radio frequency receiving and transmitting unit and terminal equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109361415B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112202458A (en) * | 2020-09-11 | 2021-01-08 | 深圳市广和通无线股份有限公司 | Communication module and communication terminal |
| CN114070336B (en) * | 2021-10-25 | 2023-03-24 | 中国电子科技集团公司第二十九研究所 | Ultra-wideband TR (transmitter-receiver) component high-efficiency low-harmonic transmission circuit and implementation method |
| CN114362772B (en) * | 2022-03-07 | 2022-06-17 | 佛山市联动科技股份有限公司 | Harmonic suppression circuit and radio frequency ATE (automatic test equipment) tester |
| CN114665824B (en) * | 2022-05-24 | 2022-09-02 | 四川中铁二院环保科技有限公司 | Data multilevel processing device for shearing data |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101371450A (en) * | 2006-01-12 | 2009-02-18 | 索尼爱立信移动通讯股份有限公司 | Multiband antenna switch |
| CN101409911A (en) * | 2008-11-21 | 2009-04-15 | 闻泰集团有限公司 | PHS mobile phone and emission power control method thereof |
| CN104954052A (en) * | 2014-03-28 | 2015-09-30 | 国基电子（上海）有限公司 | Multiple-input multiple-output antenna transmitting-receiving circuit |
| CN105721002A (en) * | 2016-04-15 | 2016-06-29 | 努比亚技术有限公司 | Terminal filtering method, system and device and filtering terminal |
| CN107094032A (en) * | 2017-05-10 | 2017-08-25 | 广州慧智微电子有限公司 | A kind of RF front-end module and frequency signal processing method |
| CN107395250A (en) * | 2017-08-22 | 2017-11-24 | 上海斐讯数据通信技术有限公司 | A kind of radio circuit and the method for reducing radio circuit harmonic wave interference |
| CN107979388A (en) * | 2017-12-29 | 2018-05-01 | 陕西烽火电子股份有限公司 | A kind of wave filter group device of ultrashort wave broadband transceiver |
| CN209345143U (en) * | 2018-12-03 | 2019-09-03 | 上海金卓网络科技有限公司 | Transmit Receive Unit and terminal device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8750809B2 (en) * | 2011-08-03 | 2014-06-10 | Blackberry Limited | Mobile wireless communications device with selectively controlled antenna and filter switches and related methods |
-
2018
- 2018-12-03 CN CN201811467206.XA patent/CN109361415B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101371450A (en) * | 2006-01-12 | 2009-02-18 | 索尼爱立信移动通讯股份有限公司 | Multiband antenna switch |
| CN101409911A (en) * | 2008-11-21 | 2009-04-15 | 闻泰集团有限公司 | PHS mobile phone and emission power control method thereof |
| CN104954052A (en) * | 2014-03-28 | 2015-09-30 | 国基电子（上海）有限公司 | Multiple-input multiple-output antenna transmitting-receiving circuit |
| CN105721002A (en) * | 2016-04-15 | 2016-06-29 | 努比亚技术有限公司 | Terminal filtering method, system and device and filtering terminal |
| CN107094032A (en) * | 2017-05-10 | 2017-08-25 | 广州慧智微电子有限公司 | A kind of RF front-end module and frequency signal processing method |
| CN107395250A (en) * | 2017-08-22 | 2017-11-24 | 上海斐讯数据通信技术有限公司 | A kind of radio circuit and the method for reducing radio circuit harmonic wave interference |
| CN107979388A (en) * | 2017-12-29 | 2018-05-01 | 陕西烽火电子股份有限公司 | A kind of wave filter group device of ultrashort wave broadband transceiver |
| CN209345143U (en) * | 2018-12-03 | 2019-09-03 | 上海金卓网络科技有限公司 | Transmit Receive Unit and terminal device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109361415A (en) | 2019-02-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109361415B (en) | Harmonic suppression method of radio frequency receiving and transmitting unit, radio frequency receiving and transmitting unit and terminal equipment | |
| CN110048735B (en) | System and method for radio frequency filter | |
| US10886951B2 (en) | Front-end module | |
| RU2493649C2 (en) | Method for frequency-dependent suppression of signals and apparatus for realising said method (versions) | |
| US9608688B2 (en) | High linearity RF diplexer | |
| KR102081620B1 (en) | Transceivers and Methods for Reducing Self-Interference in Transceivers | |
| CN108718219B (en) | Anti-harmonic interference device for carrier aggregation, antenna device and mobile terminal | |
| US10084489B2 (en) | Multiple antenna system and transceiver front end for interband downlink carrier aggregation | |
| EP2911305B1 (en) | Multiplexer | |
| US11349510B2 (en) | Radio frequency front end module and communication device | |
| US20190036217A1 (en) | Selectable Filtering with Switching | |
| JP2017063315A (en) | module | |
| CN209345143U (en) | Transmit Receive Unit and terminal device | |
| US9906204B2 (en) | Tunable filter off-states for noise rejection | |
| CN110839280B (en) | Method, system, medium, and electronic device for suppressing frequency interference of mobile terminal | |
| US9893709B2 (en) | RF triplexer architecture | |
| CN216056999U (en) | Radio frequency circuit, antenna device and terminal equipment | |
| EP3913811A1 (en) | Signal booster for spectrally adjacent bands | |
| CN114097177B (en) | Circuit arrangement for transmitting radio signals and method for operating a circuit arrangement | |
| Chandran et al. | Transmitter leakage analysis when operating USRP (N210) in duplex mode | |
| US20160352495A1 (en) | Communication circuit and communication apparatus | |
| CN112886979A (en) | CA anti-frequency multiplication interference circuit, radio frequency circuit and communication equipment | |
| JP2009278225A (en) | Radio communication device | |
| US11349505B2 (en) | Systems and methods for transceiver coexistence filtering | |
| CN116054967B (en) | Power detection circuit and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Room 802a, building 5, 3000 Longdong Avenue, Pudong New Area Free Trade Zone, Shanghai, 201203 Applicant after: Shanghai Jinzhuo Technology Co.,Ltd. Address before: Room 802a, building 5, 3000 Longdong Avenue, Pudong New Area Free Trade Zone, Shanghai, 201203 Applicant before: SHANGHAI KINDROID NETWORK TECHNOLOGY CO.,LTD. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |