CN114614838B - Radio frequency system and communication equipment - Google Patents
Radio frequency system and communication equipment Download PDFInfo
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- CN114614838B CN114614838B CN202210148131.9A CN202210148131A CN114614838B CN 114614838 B CN114614838 B CN 114614838B CN 202210148131 A CN202210148131 A CN 202210148131A CN 114614838 B CN114614838 B CN 114614838B
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
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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 application relates to a radio frequency system and communication equipment, which comprises a first radio frequency module, a second radio frequency module and a first impedance matching module, wherein the first impedance matching module is respectively connected with the first radio frequency module, the second radio frequency module, a first antenna and a second antenna and is used for correspondingly gating a first target matching network respectively connected with the first radio frequency module, the second radio frequency module, the first antenna and the second antenna when the first antenna is a main set antenna; when the second antenna is a main set antenna, the corresponding gating is respectively connected to the first radio frequency module, the second radio frequency module, the first antenna and the second target matching network of the second antenna. Therefore, the radio frequency system can gate the corresponding first target matching network or second target matching network according to the switching condition of the main set antenna, so that the first impedance matching module can match corresponding impedance adjustment on different antenna switching paths, the adaptation of impedance is ensured, and the radio frequency performance is improved.
Description
Technical Field
The present disclosure relates to the field of antenna technologies, and in particular, to a radio frequency system and a communication device.
Background
With the development of antenna technology, in order to improve the communication quality of a radio frequency system, the radio frequency system is generally configured to support an antenna switching function. However, during the antenna switching process, the rf path is changed, and the routing is different, so that the risk of impedance mismatch under the potential antenna switching is caused, and thus the rf performance may be reduced.
Disclosure of Invention
The embodiment of the application provides a radio frequency system and communication equipment, which can avoid the risk of impedance mismatch under antenna switching and optimize radio frequency performance.
A radio frequency system comprising:
the first radio frequency module is connected with the radio frequency transceiver and is used for supporting the receiving and processing of radio frequency signals;
the second radio frequency module is connected with the radio frequency transceiver, is switchably connected with the first radio frequency module and is connected to the first antenna and the second antenna, and the second radio frequency module is used for supporting the receiving processing of radio frequency signals;
the first impedance matching module is respectively connected with the first radio frequency module, the second radio frequency module, the first antenna and the second antenna, and comprises a first target matching network and a second target matching network, and is used for correspondingly gating the first target matching networks respectively connected to the first radio frequency module, the second radio frequency module, the first antenna and the second antenna when the first antenna is a main set antenna so as to perform first impedance matching on radio frequency signals received by the first antenna and the second antenna; when the second antenna is a main set antenna, the second target matching networks respectively connected to the first radio frequency module, the second radio frequency module, the first antenna and the second antenna are correspondingly gated so as to perform second impedance matching on radio frequency signals received by the first antenna and the second antenna.
A communication device, comprising:
a radio frequency system as described above.
The radio frequency system and the communication equipment comprise a first radio frequency module, a second radio frequency module and a first impedance matching module, wherein the first impedance matching module is respectively connected with the first radio frequency module, the second radio frequency module, the first antenna and the second antenna and is used for correspondingly gating a first target matching network respectively connected to the first radio frequency module, the second radio frequency module, the first antenna and the second antenna when the first antenna is a main set antenna so as to perform first impedance matching on radio frequency signals received by the first antenna and the second antenna; when the second antenna is a main set antenna, the second target matching networks respectively connected to the first radio frequency module, the second radio frequency module, the first antenna and the second antenna are correspondingly gated so as to perform second impedance matching on radio frequency signals received by the first antenna and the second antenna. Therefore, the radio frequency system can gate the corresponding first target matching network or second target matching network according to the switching condition of the main set antenna, so that the first impedance matching module can match corresponding impedance adjustment on different antenna switching paths, the adaptation of impedance is ensured, and the radio frequency performance of the radio frequency system is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an RF system in one embodiment;
FIG. 2 is a second schematic diagram of an RF system according to one embodiment;
FIG. 3 is a third schematic diagram of an RF system in one embodiment;
FIG. 4 is a schematic diagram of a RF system in one embodiment;
FIG. 5 is a schematic diagram of a radio frequency system in one embodiment;
FIG. 6 is a schematic diagram of a RF system in one embodiment;
FIG. 7 is a schematic diagram of a RF system in one embodiment;
FIG. 8 is a schematic diagram of an RF system in one embodiment;
fig. 9 is a schematic structural diagram of a communication device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
It will be understood that the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element and should not be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
The radio frequency system according to the embodiments of the present application may be applied to a communication device having a wireless communication function, where the communication device may be a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing devices connected to a wireless modem, and various types of User Equipment (UE) (e.g., a Mobile Station, MS), and so on. For convenience of description, the above-mentioned devices are collectively referred to as communication devices.
As shown in fig. 1, in one embodiment, a radio frequency system provided in an embodiment of the present application includes: the first radio frequency module 11, the second radio frequency module 12 and the first impedance matching module 13.
The first radio frequency module 11 is connected with the radio frequency transceiver 10 and is used for supporting the receiving and processing of radio frequency signals; the second radio frequency module 12 is connected to the radio frequency transceiver 10 and switchably connected to the first antenna ANT1 and the second antenna ANT2 with the first radio frequency module 11, and is used for supporting the receiving processing of the radio frequency signal.
The first impedance matching module 13 is respectively connected with the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1 and the second antenna ANT2, and comprises a first target matching network and a second target matching network, and is used for correspondingly gating the first target matching networks respectively connected to the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1 and the second antenna ANT2 when the first antenna ANT1 is a main set antenna so as to perform first impedance matching on radio frequency signals received by the first antenna ANT1 and the second antenna ANT 2; when the second antenna ANT2 is the main set antenna, the corresponding gates are respectively connected to the second target matching networks of the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1 and the second antenna ANT2, so as to perform second impedance matching on radio frequency signals received by the first antenna ANT1 and the second antenna ANT 2.
Wherein, the first rf module 11 and the second rf module 12 may be used to support a receiving process of the rf signal, and the receiving process may be understood as a low noise power amplifying process; the first antenna ANT1 and the second antenna ANT2 are both used for implementing the receiving and transmitting processing of radio frequency signals, and the radio frequency signals can be, for example, 4G LTE radio frequency signals and 5G NR radio frequency signals. The first antenna ANT1 and the second antenna ANT2 may be formed using any suitable type of antenna. For example, each antenna may include an antenna with a resonating element formed from the following antenna structure: at least one of an array antenna structure, a loop antenna structure, a patch antenna structure, a slot antenna structure, a helical antenna structure, a strip antenna, a monopole antenna, a dipole antenna, and the like. Different types of antennas may be used for different frequency bands and combinations of frequency bands. In the present embodiment, the type of the antenna is not further limited.
The first rf module 11 and the second rf module 12 are switchably connected to the first antenna ANT1 and the second antenna ANT2, so that a main set antenna of the target can be determined in the first antenna ANT1 and the second antenna ANT2, so that the rf module connected with the main set antenna of the target can transmit and receive the main set, so that uplink signals are distributed on the antenna with better antenna efficiency, and reliability of the uplink signals can be ensured to improve communication performance of the operation of the rf system.
The first impedance matching module 13 is connected to the first rf module 11, the second rf module 12, the first antenna ANT1, and the second antenna ANT2, respectively. The first impedance matching module 13 includes a first target matching network and a second target matching network, where the first target matching network can be respectively connected with the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1, and the second antenna ANT2 when gating, so as to perform first impedance matching on radio frequency signals received by the first antenna ANT1 and the second antenna ANT 2; the second target matching network can be respectively connected with the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1 and the second antenna ANT2 when in gating, so as to perform second impedance matching on radio frequency signals received by the first antenna ANT1 and the second antenna ANT 2.
When the first antenna ANT1 is the main set antenna, the first target matching network is selected to perform the first impedance matching on the radio frequency signal on the path between the radio frequency module received by the main set and the first antenna ANT1 and the radio frequency signal on the path between the radio frequency module received by the diversity and the second antenna ANT2 (fig. 2 uses the radio frequency module received by the first radio frequency module 11 as the main set as an example, then the simple schematic network formed by the a matching path and the b matching path shown in fig. 2 can be understood as the first target matching network); when the second antenna ANT2 is the main set antenna, the second target matching network is selected to perform the second impedance matching on the radio frequency signal on the path between the radio frequency module received by the main set and the second antenna ANT2 and the radio frequency signal on the path between the radio frequency module received by the diversity and the first antenna ANT1 (fig. 3 uses the radio frequency module received by the first radio frequency module 11 as the main set as an example, then the simple schematic network formed by the c matching path and the d matching path shown in fig. 3 can be understood as the second target matching network).
Therefore, when the first radio frequency module 11 and the second radio frequency module 12 switch the connection of the main set antenna and the radio frequency channel on the radio frequency system is changed, the first impedance matching module 13 can gate the corresponding first target matching network or second target matching network according to the switching condition of the main set antenna, so that the target matching network is correspondingly changed along with the change of the radio frequency circuit, corresponding impedance adjustment is matched on different antenna switching channels, the adaptation of the impedance is ensured, and the problem that the performance is reduced due to impedance mismatch caused by the switching of the antennas is avoided.
When the first antenna ANT1 is the main set antenna, the radio frequency paths between the first antenna ANT1 and the first radio frequency module 11 are different from the radio frequency paths between the second antenna ANT2 and the second radio frequency module 12, so that the first impedance matching performed by the first target matching network on the radio frequency paths between the first antenna ANT1 and the first radio frequency module 11 is different from the first impedance matching performed by the first target matching network on the radio frequency paths between the second antenna ANT2 and the second radio frequency module 12; it will be appreciated that when the second antenna ANT2 is the main set antenna, the second impedance matching performed by the second target matching network on the rf path between the second antenna ANT2 and the first rf module 11 is different from the second impedance matching performed by the second target matching network on the rf path between the first antenna ANT1 and the second rf module 12. Correspondingly, the first target matching network and the second target matching network may respectively include at least two matching units so that the same target matching network can form two matching paths to perform corresponding impedance adjustment on radio frequency signals on different paths, for example, the first target matching network includes two matching units, one matching unit in the first target matching network may respectively form a matching path with the first radio frequency module 11 and the first antenna ANT1, and the other matching unit may respectively form another matching circuit with the second radio frequency module 12 and the second antenna ANT 2. The impedance matching parameters corresponding to the first impedance matching and the second impedance matching can be set and adjusted according to the actual antenna type and the line condition of the path, which is not limited herein.
The radio frequency system provided in this embodiment includes a first radio frequency module 11, a second radio frequency module 12, and a first impedance matching module 13, where the first impedance matching module 13 is connected to the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1, and the second antenna ANT2, respectively, and is configured to gate a first target matching network respectively connected to the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1, and the second antenna ANT2 when the first antenna ANT1 is a main set antenna, so as to perform first impedance matching on radio frequency signals received by the first antenna ANT1 and the second antenna ANT 2; when the second antenna ANT2 is the main set antenna, the corresponding gates are respectively connected to the second target matching networks of the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1 and the second antenna ANT2, so as to perform second impedance matching on radio frequency signals received by the first antenna ANT1 and the second antenna ANT 2. Therefore, the first impedance matching module 13 can match corresponding impedance adjustment on different antenna switching paths according to the first target matching network or the second target matching network corresponding to the switching gating of the main set antenna, so as to ensure the adaptation of impedance and improve the radio frequency performance of the radio frequency system.
In some embodiments, the first rf module 11 is configured to support transmission and primary set reception of rf signals, and the second rf module 12 is configured to support diversity reception of rf signals; wherein: the first impedance matching module 13 is configured to gate a first path between the first radio frequency module 11, the first target matching network, and the first antenna ANT1 and a second path between the second radio frequency module 12, the first target matching network, and the second antenna ANT2 when the first antenna ANT1 is the main set antenna; for gating a third path between the first radio frequency module 11, the second target matching network, the second antenna ANT2 and a fourth path between the second radio frequency module 12, the second target matching network, the first antenna ANT1 when the second antenna ANT2 is the main set antenna.
When the first rf module 11 is configured to support transmission of an rf signal and reception of a main set, the first rf module 11 is connected to the first antenna ANT1 as a main set antenna or the second antenna ANT2 as a main set antenna through the first impedance matching module 13. The first rf module 11 is configured with a transmit path for supporting power amplification processing of the rf signal output from the rf transceiver 10 and outputting to the first impedance matching module 13, and a receive path for supporting low noise amplification processing of the rf signal after impedance matching and outputting to the rf transceiver 10, thereby realizing transceiving processing of the rf signal. The first rf module 11 may be understood as a power amplifier module (Power amplifier module integrated duplexer, PA Mid) integrating a power amplifier, a diplexer and a low noise amplifier. The first rf module 11 may be integrated as a chip, and each port configured on the chip may be understood as an rf pin of the PA Mid device.
Wherein, when the second rf module 12 is used to support diversity reception of the rf signal, the second rf module 12 is connected to the first antenna ANT1 as a diversity antenna or the second antenna ANT2 as a diversity antenna through the first impedance matching network. The second rf module 12 is configured with a receiving path for supporting low noise amplification processing of the rf signal after impedance matching and outputting to the rf transceiver 10, thereby enabling reception processing of the rf signal. The second radio frequency module 12 may be understood as a low noise amplification module, which may include in particular filters and low noise amplifiers.
Wherein, when the first radio frequency module 11 is used for supporting the transmission and the main set reception of radio frequency signals, the second radio frequency module 12 is used for supporting the diversity reception of radio frequency signals, the first impedance matching module 13 is used for gating the first path among the first radio frequency module 11, the first target matching network, the first antenna ANT1 and the second path among the second radio frequency module 12, the first target matching network and the second antenna ANT2 when the first antenna ANT1 is the main set antenna; the first target matching network can perform corresponding impedance adjustment on the radio frequency signals output by the first radio frequency module 11 and then output the radio frequency signals to the first antenna ANT1 for transmission, and perform corresponding impedance adjustment on the radio frequency signals received by the main set of the first antenna ANT1 and then output the radio frequency signals to the first radio frequency module 11; the first target matching network may also perform corresponding impedance adjustment on the radio frequency signals received by the second antenna ANT2 in diversity, and output the radio frequency signals to the second radio frequency module 12. The first impedance matching module 13 is further configured to gate a third path between the first radio frequency module 11, the second target matching network, and the second antenna ANT2 and a fourth path between the second radio frequency module 12, the second target matching network, and the first antenna ANT1 when the second antenna ANT2 is the main set antenna; the first target matching network can perform corresponding impedance adjustment on the radio frequency signals output by the first radio frequency module 11 and then output the radio frequency signals to the second antenna ANT2 for transmission, and perform corresponding impedance adjustment on the radio frequency signals received by the main set of the second antenna ANT2 and then output the radio frequency signals to the first radio frequency module 11; the first target matching network may also perform corresponding impedance adjustment on the radio frequency signals received by the first antenna ANT1 in diversity, and output the radio frequency signals to the second radio frequency module 12.
In some embodiments, when the first rf module 11 is used to support transmission and main set reception of rf signals and the second rf module 12 is used to support diversity reception of rf signals, as shown in fig. 4, the first target matching network includes a first matching unit 131 and a second matching unit 132, the second target matching network includes a third matching unit 133 and a fourth matching unit 134, and the first impedance matching module 13 further includes: a first gating unit 135 and a second gating unit 136.
The first gating unit 135 is connected to the first rf module 11, the second rf module 12, the first matching unit 131, the second matching unit 132, the third matching unit 133, and the fourth matching unit 134, respectively; the second gating unit 136 is connected to the first matching unit 131, the second matching unit 132, the third matching unit 133, the fourth matching unit 134, the first antenna ANT1, and the second antenna ANT2, respectively.
The first gating unit 135 and the second gating unit 136 are used for commonly gating the first matching unit 131 respectively connected to the first radio frequency module 11 and the first antenna ANT1 when the first antenna ANT1 is the main set antenna, and the second matching unit 132 respectively connected between the second radio frequency module 12 and the second antenna ANT 2; the first gating unit 135 and the second gating unit 136 are further configured to jointly gate the third matching unit 133 connected to the first radio frequency module 11 and the second antenna ANT2, respectively, and the fourth matching unit 134 connected to the second radio frequency module 12 and the first antenna ANT1, respectively, when the second antenna ANT2 is the main set antenna.
The first matching unit 131 and the second matching unit 132 are matching units on different radio frequency paths in the same target matching network, and are used for respectively performing impedance adjustment on radio frequency signals on the radio frequency paths when the first antenna ANT1 is a main set antenna; the third matching unit 133 and the fourth matching unit 134 are matching units on different radio frequency paths in the same target matching network, and are configured to respectively perform impedance adjustment on radio frequency signals on the radio frequency paths when the second antenna ANT2 is the main set antenna. Because the wiring has differences on different radio frequency channels, the impedance adjustment values of different matching units can be different corresponding to the differences of the wiring and the like, and the adjustment is specifically carried out according to the actual channel conditions, so that the adaptability of the impedance is improved.
The first gating unit 135 is connected to the first rf module 11, the second rf module 12, the first matching unit 131, the second matching unit 132, the third matching unit 133, and the fourth matching unit 134, respectively; the second gating unit 136 is respectively connected with the first matching unit 131, the second matching unit 132, the third matching unit 133, the fourth matching unit 134, the first antenna ANT1 and the second antenna ANT2, so that the first radio frequency module 11 and the second radio frequency module 12 can be selectively connected with the first antenna ANT1 and the second antenna ANT2 in a switchable manner through the first gating unit 135 and the second gating unit 136, and a main set antenna of a target is determined from the first antenna ANT1 and the second antenna ANT2, so that a radio frequency module connected with the main set antenna of the target can transmit and receive the main set, and uplink signals are distributed on an antenna with better antenna efficiency, and the reliability of the uplink signals can be ensured to improve the communication performance of the radio frequency system operation; on the other hand, the impedance matching units corresponding to the switching paths of different main set antennas can be selected to perform corresponding impedance adjustment on different antenna switching paths, so that the impedance adaptation is ensured, and the radio frequency performance of the radio frequency system is improved.
Specifically, when the first antenna ANT1 is a main set antenna, the first gating unit 135 and the second gating unit 136 are configured to gate the first matching units 131 connected to the first radio frequency module 11 and the first antenna ANT1, respectively, together so as to conduct a first path between the first radio frequency module 11, the first matching units 131, and the first antenna ANT1, where the first radio frequency module 11 is connected to the first antenna ANT1 and impedance is adjusted by the first matching units 131, so that a load impedance of the first radio frequency module 11 is matched with an impedance of the first antenna ANT 1; and commonly gating the second matching units 132 respectively connected to the second radio frequency module 12 and the second antenna ANT2 to conduct the second paths among the second radio frequency module 12, the second matching units 132 and the second antenna ANT2, wherein the second radio frequency module 12 is connected to the second antenna ANT2 and is subjected to impedance adjustment by the second matching units 132, so that the load impedance of the second radio frequency module 12 is matched with the impedance of the second antenna ANT 2. In the embodiment shown in fig. 4, the first path and the second path can be understood as two-pass paths, and the matching impedance on the two-pass paths can be ensured by the first matching unit 131 and the second matching unit 132.
Specifically, when the second antenna ANT2 is the main set antenna, the first gating unit 135 and the second gating unit 136 commonly gate the third matching unit 133 connected to the first radio frequency module 11 and the second antenna ANT2, respectively, so as to conduct a third path between the first radio frequency module 11, the third matching unit 133 and the second antenna ANT2, and the first radio frequency module 11 is connected to the second antenna ANT2 and is impedance-adjusted by the third matching unit 133, so that the load impedance of the first radio frequency module 11 is matched with the impedance of the second antenna ANT 2; and a fourth matching unit 134 connected to the second rf module 12 and the first antenna ANT1 respectively is commonly gated so as to conduct a fourth path between the second rf module 12, the fourth matching unit 134 and the first antenna ANT1, wherein the second rf module 12 is connected to the first antenna ANT1 and is impedance-adjusted by the fourth matching unit 134, so that the load impedance of the second rf module 12 is matched with the impedance of the first antenna ANT 1. In the embodiment shown in fig. 4, the third path and the fourth path can be understood as two-cross paths, and the matching impedance on the two-cross paths can be ensured by the third matching unit 133 and the fourth matching unit 134.
Therefore, through the switching of the first gating unit 135 and the second gating unit 136, normal switching of the cross state and the calling scene of the matching network can be realized, the through state and the cross state are separated to form the independent impedance matching networks, the through state matching network is used for adjusting the size of the path matching impedance in the through state, the cross state matching network is used for adjusting the size of the path matching impedance in the cross state, the good impedance matching state in the through state is ensured, the risk of path matching mismatch in the cross state is avoided, and therefore the radio frequency performance in two states can be ensured simultaneously.
It should be noted that, in order to reduce the occupied area of the matching unit in the radio frequency system and reduce the cost, only two matching units may be disposed in each matching network, but in other cases where modulation is required, the matching units may not be limited to two, and specifically may be adjusted according to actual requirements, for example, in order to avoid damage of the matching units, two first matching units 131 and two second matching units 132 may also be disposed, and when impedance matching is required by the first target matching network, one first matching unit 131 and one second matching unit 132 may be selected from the two first matching units 131 and two second matching units 132.
In the above embodiment, each of the first gate unit 135 and the second gate unit 136 may include a switching device, through which the matching units on different paths are gated, for example, each of the first gate unit 135 and the second gate unit 136 may include a single pole double throw switch or a double pole four throw switch, and specifically, the selection of the device may be determined based on the device area and the layout.
Alternatively, as shown in fig. 5 (fig. 5 illustrates a module that is received by taking the first radio frequency module 11 as a main set as an example), the first gating unit 135 includes: a first single pole double throw switch SPDT1 and a second single pole double throw switch SPDT2.
A first single pole double throw switch SPDT1, a first end of the first single pole double throw switch SPDT1 (see contact 1 of SPDT1 in the figure) is connected with the first radio frequency module 11, and two second ends of the first single pole double throw switch (see contact 2 and contact 3 of SPDT1 in the figure) are respectively connected with the first matching unit 131 and the third matching unit 133 in a one-to-one correspondence; and a second single pole double throw switch, wherein a first end (see contact 1 of SPDT2 in the figure) of the second single pole double throw switch is connected with the second radio frequency module 12, and two second ends (see contact 2 and contact 3 of SPDT2 in the figure) of the second single pole double throw switch are respectively connected with the second matching unit 132 and the fourth matching unit 134 in a one-to-one correspondence.
Specifically, the gating is connected to the paths between the first rf module 11 and the first matching unit 131 when the first single pole double throw switch SPDT1 gates the contact 1 and the contact 2, respectively, and the second single pole double throw switch SPDT2 gates the paths between the second rf module 12 and the second matching unit 132 when the second single pole double throw switch SPDT2 gates the contact 1 and the contact 2. The gating is connected to the path between the first rf module 11 and the third matching unit 133 when the first single pole double throw switch SPDT1 gates contact 1 and contact 3, and the second single pole double throw switch SPDT2 gates contact 1 and contact 3, respectively, and the path between the second rf module 12 and the fourth matching unit 134.
Alternatively, as shown in fig. 5, the second gating unit 136 includes: the first end of the third single-pole double-throw switch SPDT3 is connected with the first antenna ANT1, and the two second ends of the third single-pole double-throw switch SPDT3 are respectively connected with the first matching unit 131 and the fourth matching unit 134 in a one-to-one correspondence manner; and a fourth single pole double throw switch SPDT4, wherein a first end of the fourth single pole double throw switch SPDT4 is connected with the second antenna ANT2, and two second ends of the fourth single pole double throw switch SPDT4 are respectively connected with the second matching unit 132 and the third matching unit 133 in a one-to-one correspondence manner.
Specifically, when the third single pole double throw switch SPDT3 gates the contact 1 and the contact 2 and the fourth single pole double throw switch SPDT4 gates the contact 1 and the contact 2, the third single pole double throw switch SPDT3 and the fourth single pole double throw switch SPDT4 respectively correspond to the path between the gate first matching unit 131 and the first antenna ANT1, and the path between the gate second matching unit 132 and the second antenna ANT 2. When the third single pole double throw switch SPDT3 gates the contact 1 and the contact 3 and the fourth single pole double throw switch SPDT4 gates the contact 1 and the contact 3, the third single pole double throw switch SPDT3 and the fourth single pole double throw switch SPDT4 respectively gate the path between the fourth matching unit 134 and the first antenna ANT1, and gate the path between the third matching unit 133 and the second antenna ANT 2.
Alternatively, as shown in fig. 6, the first gating unit 135 may further include: a first double pole four throw switch DP4T1.
The first double-pole four-throw switch DP4T1, two first ends of the first double-pole four-throw switch DP4T1 are respectively connected with the first radio frequency module 11 and the second radio frequency module 12 in a one-to-one correspondence manner, and four second ends of the first double-pole four-throw switch DP4T1 are respectively connected with the first matching unit 131, the third matching unit 133, the second matching unit 132 and the fourth matching unit 134 in a one-to-one correspondence manner. Specifically, when the contact 1 of the first double-pole four-throw switch DP4T1 gates the contact 3 and the contact 2 gates the contact 6, the first double-pole four-throw switch DP4T1 gates the first matching unit 131 connected to the first rf module 11 and the first antenna ANT1, respectively, and the second matching unit 132 connected to the second rf module 12 and the second antenna ANT2, respectively. When the contact 1 of the first double-pole four-throw switch DP4T1 gates the contact 4 and the contact 2 gates the contact 5, the first double-pole four-throw switch DP4T1 gates the third matching unit 133 connected to the first radio frequency module 11 and the second antenna ANT2, respectively, and the fourth matching unit 134 connected between the second radio frequency module 12 and the first antenna ANT1, respectively.
Alternatively, as shown in fig. 6, the second gating unit 136 includes: the two first ends of the second double-pole four-throw switch DP4T2 are respectively connected with the first antenna ANT1 and the second antenna ANT2 in a one-to-one correspondence manner, and the four second ends of the second double-pole four-throw switch DP4T2 are respectively connected with the first matching unit 131, the third matching unit 133, the second matching unit 132 and the fourth matching unit 134 in a one-to-one correspondence manner. Specifically, when the contact 1 of the second double-pole four-throw switch DP4T2 gates the contact 3, the contact 2 gates the contact 6, the second double-pole four-throw switch DP4T2 gates the path between the first matching unit 131 and the first antenna ANT1, and gates the path between the second matching unit 132 and the second antenna ANT 2; when the contact 1 of the second double pole four throw switch DP4T2 gates the contact 4, the contact 2 gates the contact 5, the second double pole four throw switch DP4T2 gates the path between the fourth matching unit 134, the first antenna ANT1, and the third matching unit 133, the second antenna ANT 2.
In the above embodiment, the first matching unit 131, the second matching unit 132, the third matching unit 133, the fourth matching unit 134, and the like can adjust the impedance in a series-parallel manner by tunable inductance, capacitance, resistance, and the like. The tunable inductor, the capacitor, the resistor and the like can form different types of impedance matching units in a serial-parallel connection mode, such as pi-type impedance matching units, L-type impedance matching units, T-type impedance matching units and the like. Optionally, at least one of the first matching unit 131, the second matching unit 132, the third matching unit 133, and the fourth matching unit 134 is a pi-type impedance matching unit. Optionally, each pi-type impedance matching unit may be shown (where Z may be an inductance, a capacitance, a resistance, or the like), and further optionally, as shown in fig. 5 and fig. 6, the first matching unit 131, the second matching unit 132, the third matching unit 133, and the fourth matching unit 134 are pi-type impedance matching units.
In some embodiments, the radio frequency transceiver 10 is further connected to the controlled end of the first gating unit 135 and the controlled end of the second gating unit 136, respectively, for configuring a main set antenna according to quality information of radio frequency signals received by the first antenna ANT1 and the second antenna ANT2, and controlling the first gating unit 135 and the second gating unit 136 to jointly gate the first target matching network or to jointly gate the second target matching network according to the main set antenna. Specifically, the radio frequency transceiver 10 determines and configures a main set of antennas from the first antenna ANT1 and the second antenna ANT2 according to quality information of radio frequency signals received by the first antenna ANT1 and the second antenna ANT2, controls the first gating unit 135 and the second gating unit 136 to jointly gate the first target matching network when the first antenna ANT1 is configured as the main set of antennas, and controls the first gating unit 135 and the second gating unit 136 to jointly gate the second target matching network when the second antenna ANT2 is configured as the main set of antennas.
The controlled end of the first gate unit 135 may be understood as the controlled end of the switch inside the first gate unit 135, and the controlled end of the second gate unit 136 may be understood as the controlled end of the switch inside the second gate unit 136. The radio frequency transceiver 10 controls the gating conditions of the first gating unit 135 and the second gating unit 136 by controlling the controlled ends of the first gating unit 135 and the second gating unit 136.
The quality information may include, among other things, raw and processed information associated with the radio performance metrics of the signals, such as signal strength, received power, reference signal received power (Reference Signal Receiving Power, RSRP), received signal strength (Received Signal Strength Indicator, RSSI), signal-to-noise ratio (Signal to Noise Ratio, SNR), rank (Rank) of the MIMO channel matrix, carrier-to-interference-and-noise ratio (Carrier to Interference plus Noise Ratio, RS-CINR), frame error rate, bit error rate, reference signal received quality (Reference signal reception quality, RSRQ), and the like. Further alternatively, the radio frequency transceiver 10 may store configuration information of each circuit connected to each antenna in advance. The configuration information may include identification information of the antenna, identification information of each circuit, control logic information of each switch on a radio frequency path between the first radio frequency module 11, the second radio frequency module 12 and different switchable antennas, and the like.
Taking network information as the received signal strength as an example, the following description will be given: the first antenna ANT1 may be configured as a default main set antenna and the second antenna ANT2 may be configured as a default diversity antenna; wherein: if the difference between the second signal strength of the radio frequency signal received by the second antenna ANT2 and the first signal strength of the radio frequency signal received by the first antenna ANT1 is greater than or equal to a preset threshold value in a preset time period, configuring the second antenna ANT2 as a main set antenna, and configuring the first antenna ANT1 as a diversity antenna.
Specifically, when the first antenna ANT1 is configured as a default main set antenna and the second antenna ANT2 is configured as a default diversity antenna, the radio frequency transceiver 10 receives radio frequency signals received by the first antenna ANT1 and the second antenna ANT2 through the first radio frequency module 11 and the second radio frequency module 12, respectively, and controls switching of the antennas according to a first signal strength of the radio frequency signals received by the first antenna ANT1 and a second signal strength of the radio frequency signals received by the second antenna ANT 2. More specifically, if the difference obtained by subtracting the first received signal strength from the second received signal strength is greater than or equal to the preset threshold value within the preset time, the second antenna ANT2 is used as the main set antenna. After determining the target antenna, the radio frequency transceiver 10 may control the relevant logic switch of the radio frequency system to turn on the transceiving path between the second antenna ANT2 and the first radio frequency module 11, so as to implement radio frequency transmission and main set reception by using the second antenna ANT2, so as to improve the communication quality of radio frequency signals. If the difference is smaller than the preset threshold, the first antenna ANT1 is continuously used as the main set antenna, and the current working state is maintained.
The preset threshold values are all larger than zero, and the size of the preset threshold values can be set according to requirements. By setting the judgment condition of the preset threshold value, frequent switching between antennas caused by that the signal receiving intensity of the antennas is possibly always in variation can be prevented, and the influence of the transmission efficiency of the antennas can be reduced.
In some embodiments, the number of the first antennas ANT1 is a plurality and the number of the first target matching networks is a plurality, where the plurality of first target matching networks are in one-to-one correspondence with the plurality of first antennas ANT 1; wherein: the first impedance matching module 13 is further configured to gate the corresponding first target matching network when a first antenna ANT1 of the plurality of first antennas ANT1 is a main set antenna. Specifically, the corresponding first target matching network is preconfigured when each first antenna ANT1 is a main set antenna, so that when one first antenna ANT1 is configured as the main set antenna, the corresponding first target matching network is selected to be conducted. Therefore, the main set antenna can be selected from more first antennas ANT1, and each antenna switching condition is matched with corresponding impedance adjustment, so that the radio frequency performance is further improved.
In some embodiments, the number of the second antennas ANT2 is a plurality and the number of the second target matching networks is a plurality, where the plurality of the second target matching networks are in one-to-one correspondence with the plurality of the second antennas ANT 2; wherein: the first impedance matching module 13 is further configured to gate the corresponding second target matching network when a second antenna ANT2 of the plurality of second antennas ANT2 is a main set antenna. Specifically, the corresponding second target matching network is preconfigured when each second antenna ANT2 is a main set antenna, so that when one second antenna ANT2 is configured as the main set antenna, the corresponding second target matching network is selected to be conducted. Therefore, the main set antenna can be selected from more second antennas ANT2, and each antenna switching condition is matched with corresponding impedance adjustment, so as to further improve radio frequency performance.
It should be noted that, when the number of the first antennas ANT1 is plural, the number of the second antennas ANT2 may be one or plural; when the number of the second antennas ANT2 is plural, the number of the first antennas ANT1 may be one or plural, which is not limited herein. When the number of the first antennas ANT1 and/or the second antennas ANT2 is plural, the first gating unit 135 in the first impedance matching module 13 may correspondingly include a plurality of single pole double throw switches or include a double pole multiple throw switch, and the second gating unit 136 may correspondingly include a plurality of single pole double throw switches or include a double pole multiple throw switch, so as to gate different target matching networks through the first gating unit 135 and the second gating unit 136, and conduct different radio frequency paths.
In some embodiments, as shown in fig. 7, the radio frequency system further comprises: the second impedance matching module 14 and/or the third impedance matching module 15.
The second impedance matching module 14 is disposed between the first antenna ANT1 and the first impedance matching module 13, and is configured to perform impedance matching on the radio frequency signal received by the first antenna ANT 1. Thereby further adjusting the impedance on the path through the second impedance matching module 14 and further improving the impedance matching between the first antenna ANT1 and the radio frequency module connected thereto.
The third impedance matching module 15 is disposed between the second antenna ANT2 and the first impedance matching module 13, and is configured to perform impedance matching on the radio frequency signal received by the second antenna ANT 2.
Alternatively, the second impedance matching module 14 and the third impedance matching module 15 may be impedance-adjusted in a series-parallel manner by a tunable inductance, capacitance, resistance, or the like. The tunable inductor, the capacitor, the resistor and the like can form different types of impedance matching units in a serial-parallel connection mode, such as pi-type impedance matching units, L-type impedance matching units, T-type impedance matching units and the like. Optionally, at least one of the second impedance matching block 14 and the third impedance matching block 15 is a pi-type impedance matching unit. Alternatively, each pi-type impedance matching unit may be as shown (where Z may be an inductance, capacitance, resistance, or the like), and optionally, the second impedance matching module 14 and the third impedance matching module 15 are pi-type impedance matching units. Further alternatively, pi-type impedance matching units of the second impedance matching block 14 and the third impedance matching block 15 may be as shown in fig. 8.
The above-mentioned division of the modules and units in the radio frequency system is merely for illustration, and in other embodiments, the radio frequency system may be divided into different modules as needed to complete all or part of the functions of the radio frequency system.
The embodiment of the present application further provides a communication device, where the communication device may include the radio frequency system in any one of the foregoing embodiments, where when the first antenna ANT1 is a main set antenna, the radio frequency system is correspondingly configured to gate a first target matching network respectively connected to the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1, and the second antenna ANT2, so as to perform first impedance matching on radio frequency signals received by the first antenna ANT1 and the second antenna ANT 2; when the second antenna ANT2 is the main set antenna, the corresponding gates are respectively connected to the second target matching networks of the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1 and the second antenna ANT2, so as to perform second impedance matching on radio frequency signals received by the first antenna ANT1 and the second antenna ANT 2. Therefore, the radio frequency system can gate the corresponding first target matching network or second target matching network according to the requirement of main set antenna switching, so that the first impedance matching module 13 matches corresponding impedance adjustment on different antenna switching paths. Therefore, the communication equipment can ensure the adaptation of impedance and improve the radio frequency performance, thereby improving the experience of users.
Further, as illustrated in fig. 9, and in particular in fig. 9, handset 20 may include a memory 21 (which optionally includes one or more computer readable storage media), a processor 22, a peripheral interface 23, a radio frequency system 24, and an input/output (I/O) subsystem 26, as illustrated by way of example by a communication device, handset 20. These components optionally communicate via one or more communication buses or signal lines 29. Those skilled in the art will appreciate that handset 20 shown in fig. 9 is not limiting of the handset and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. The various components shown in fig. 9 are implemented in hardware, software, or a combination of both hardware and software, including one or more signal processing and/or application specific integrated circuits.
Memory 21 optionally includes high-speed random access memory, and also optionally includes non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Illustratively, the software components stored in the memory 21 include an operating system 211, a communication module (or instruction set) 212, a Global Positioning System (GPS) module (or instruction set) 213, and the like.
I/O subsystem 26 couples input/output peripheral devices on handset 20, such as a keypad and other input control devices, to peripheral interface 23. The I/O subsystem 26 optionally includes a touch screen, keys, tone generator, accelerometer (motion sensor), ambient light sensor and other sensors, light emitting diodes, and other status indicators, data ports, etc. Illustratively, a user may control the operation of handset 20 by supplying commands via I/O subsystem 26, and may use the output resources of I/O subsystem 26 to receive status information and other outputs from handset 20. For example, a user may activate the handset or deactivate the handset by pressing button 261.
The radio frequency system 24 may be any of the radio frequency systems described in any of the previous embodiments.
In the description of the present specification, reference to the description of the terms "one embodiment," "optionally," and the like means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A radio frequency system, comprising:
the first radio frequency module is connected with the radio frequency transceiver and is used for supporting the receiving and processing of radio frequency signals;
the second radio frequency module is connected with the radio frequency transceiver, is switchably connected with the first radio frequency module and is connected to the first antenna and the second antenna, and the second radio frequency module is used for supporting the receiving processing of radio frequency signals;
the first impedance matching module is respectively connected with the first radio frequency module, the second radio frequency module, the first antenna and the second antenna, and comprises a first target matching network and a second target matching network, and is used for correspondingly gating the first target matching networks respectively connected to the first radio frequency module, the second radio frequency module, the first antenna and the second antenna when the first antenna is a main set antenna so as to perform first impedance matching on radio frequency signals received by the first antenna and the second antenna; when the second antenna is a main set antenna, the second target matching networks respectively connected to the first radio frequency module, the second radio frequency module, the first antenna and the second antenna are correspondingly gated so as to perform second impedance matching on radio frequency signals received by the first antenna and the second antenna.
2. The radio frequency system of claim 1, wherein the first radio frequency module is configured to support transmission and primary set reception of the radio frequency signals and the second radio frequency module is configured to support diversity reception of the radio frequency signals; wherein:
the first impedance matching module is used for gating a first path among the first radio frequency module, the first target matching network and the first antenna and a second path among the second radio frequency module, the first target matching network and the second antenna when the first antenna is the main set antenna; and the second antenna is used for gating a third path among the first radio frequency module, the second target matching network and the second antenna and a fourth path among the second radio frequency module, the second target matching network and the first antenna when the second antenna is a main set antenna.
3. The radio frequency system of claim 2, wherein the first target matching network comprises a first matching unit and a second matching unit, the second target matching network comprises a third matching unit and a fourth matching unit, the first impedance matching module further comprising:
The first gating unit is respectively connected with the first radio frequency module, the second radio frequency module, the first matching unit, the second matching unit, the third matching unit and the fourth matching unit;
the second gating unit is respectively connected with the first matching unit, the second matching unit, the third matching unit, the fourth matching unit, the first antenna and the second antenna;
the first gating unit and the second gating unit are used for commonly gating the first matching units respectively connected to the first radio frequency module and the first antenna and the second matching units respectively connected between the second radio frequency module and the second antenna when the first antenna is the main set antenna;
the first gating unit and the second gating unit are further used for jointly gating the third matching unit respectively connected to the first radio frequency module and the second antenna and the fourth matching unit respectively connected to the second radio frequency module and the first antenna when the second antenna is the main set antenna.
4. The radio frequency system according to claim 3, wherein the radio frequency transceiver is further connected to a controlled end of the first gating unit and a controlled end of the second gating unit, respectively, and is configured to configure the main set antenna according to quality information of the radio frequency signals received by the first antenna and the second antenna, and control the first gating unit and the second gating unit to jointly gate the first target matching network or to jointly gate the second target matching network according to the main set antenna.
5. The radio frequency system according to claim 3, wherein the first gating unit comprises:
the first end of the first single-pole double-throw switch is connected with the first radio frequency module, and two second ends of the first single-pole double-throw switch are respectively connected with the first matching unit and the third matching unit in a one-to-one correspondence manner;
the first end of the second single-pole double-throw switch is connected with the second radio frequency module, and two second ends of the second single-pole double-throw switch are respectively connected with the second matching unit and the fourth matching unit in a one-to-one correspondence manner;
alternatively, the first gating unit includes:
the first double-pole four-throw switch is characterized in that two first ends of the first double-pole four-throw switch are respectively connected with the first radio frequency module and the second radio frequency module in a one-to-one correspondence manner, and four second ends of the first double-pole four-throw switch are respectively connected with the first matching unit, the third matching unit, the second matching unit and the fourth matching unit in a one-to-one correspondence manner.
6. A radio frequency system according to claim 3, wherein the second gating unit comprises:
The first end of the third single-pole double-throw switch is connected with the first antenna, and the two second ends of the third single-pole double-throw switch are respectively connected with the first matching unit and the fourth matching unit in a one-to-one correspondence manner;
the first end of the fourth single-pole double-throw switch is connected with the second antenna, and two second ends of the fourth single-pole double-throw switch are respectively connected with the second matching unit and the third matching unit in a one-to-one correspondence manner;
alternatively, the second gating unit includes:
the two first ends of the second double-pole four-throw switch are respectively connected with the first antenna and the second antenna in a one-to-one correspondence manner, and the four second ends of the second double-pole four-throw switch are respectively connected with the first matching unit, the third matching unit, the second matching unit and the fourth matching unit in a one-to-one correspondence manner.
7. The radio frequency system according to any one of claims 1-6, wherein the number of first antennas is a plurality and the number of first target matching networks is a plurality, the plurality of first target matching networks being in one-to-one correspondence with the plurality of first antennas; wherein:
The first impedance matching module is further configured to gate the corresponding first target matching network when one of the plurality of first antennas is a main set antenna.
8. The radio frequency system according to any one of claims 1-6, wherein the number of the second antennas is plural and the number of the second target matching networks is plural, the plural second target matching networks being in one-to-one correspondence with the plural second antennas; wherein:
the first impedance matching module is further configured to gate the corresponding second target matching network when one of the plurality of second antennas is a main set antenna.
9. The radio frequency system according to any one of claims 1-6, further comprising:
the second impedance matching module is arranged between the first antenna and the first impedance matching module and is used for carrying out impedance matching on radio frequency signals received by the first antenna; and/or
And the third impedance matching module is arranged between the second antenna and the first impedance matching module and is used for carrying out impedance matching on the radio frequency signals received by the second antenna.
10. A communication device, comprising:
The radio frequency system of claims 1-9.
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