CN114614838B - RF system and communication equipment - Google Patents

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

RF system and communication equipment

technical field

The present application relates to the technical field of antennas, in particular to a radio frequency system and communication equipment.

Background technique

With the development of antenna technology, in order to improve the communication quality of the radio frequency system, the radio frequency system is usually configured to support the antenna switching function. However, in the process of antenna switching, due to the change of the radio frequency path, the routing will also be different, so the risk of impedance mismatch under the potential antenna switching may lead to the degradation of radio frequency performance.

Contents of the invention

Embodiments of the present application provide 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 to support the receiving and processing of radio frequency signals;

The second radio frequency module is connected to the radio frequency transceiver, and is switchably connected to the first antenna and the second antenna with the first radio frequency module, and is used to support the reception and processing of radio frequency signals;

The first impedance matching module is respectively connected to the first radio frequency module, the second radio frequency module, the first antenna, and the second antenna, and includes a first target matching network and a second target matching network for When the first antenna is the main antenna, corresponding gates are respectively connected to the first target matching network of the first radio frequency module, the second radio frequency module, the first antenna, and the second antenna, To perform first impedance matching on the radio frequency signals received by the first antenna and the second antenna; when the second antenna is the main antenna, the corresponding gates are respectively connected to the first radio frequency module, the A second target matching network of the second radio frequency module, the first antenna, and the second antenna is configured to perform second impedance matching on radio frequency signals received by the first antenna and the second antenna.

A communication device comprising:

RF system as described above.

The above radio frequency system and communication equipment include a first radio frequency module, a second radio frequency module, and a first impedance matching module, and the first impedance matching module is 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 the main antenna, the corresponding gating is respectively connected to the first target matching network of the first radio frequency module, the second radio frequency module, the first antenna and the second antenna, so as to control the first antenna and the second antenna. The radio frequency signal received by the antenna is subjected to the first impedance matching; when the second antenna is the main antenna, the corresponding gate is connected to the second target matching network of the first radio frequency module, the second radio frequency module, the first antenna and the second antenna respectively , to perform second impedance matching on the radio frequency signals received by the first antenna and the second antenna. Therefore, the radio frequency system can select the corresponding first target matching network or the second target matching network according to the switching situation of the main set antenna, so that the first impedance matching module can match the corresponding impedance adjustment on different antenna switching paths, ensuring Impedance adaptation improves the RF performance of the RF system.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is one of the schematic structural diagrams of the radio frequency system in an embodiment;

Fig. 2 is the second structural diagram of the radio frequency system in an embodiment;

Fig. 3 is the third structural diagram of the radio frequency system in an embodiment;

FIG. 4 is a fourth schematic structural diagram of a radio frequency system in an embodiment;

Fig. 5 is the fifth structural diagram of the radio frequency system in an embodiment;

Fig. 6 is a sixth structural schematic diagram of a radio frequency system in an embodiment;

Fig. 7 is the seventh structural diagram of the radio frequency system in an embodiment;

Fig. 8 is an eighth structural schematic diagram of a radio frequency system in an embodiment;

Fig. 9 is a schematic structural diagram of a communication device in an embodiment.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

It can be understood that the terms "first", "second" and the like used in this application may be used to describe various elements herein, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element, and should not be interpreted as indicating or implying relative importance or implying the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. 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 involved in the embodiments of the present application can be applied to communication devices with wireless communication functions, and the communication devices can be handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, and various forms of A user equipment (User Equipment, UE) (for example, a mobile phone), a mobile station (MobileStation, MS) and so on. For convenience of description, the devices mentioned above are collectively referred to as communication devices.

As shown in FIG. 1 , in one embodiment, the radio frequency system provided by the embodiment of the present application includes: a first radio frequency module 11 , a second radio frequency module 12 and a first impedance matching module 13 .

The first radio frequency module 11 is connected to the radio frequency transceiver 10 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 is switchably connected to the first radio frequency module 11 The antenna ANT1 and the second antenna ANT2 are used to support receiving and processing radio frequency signals.

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 includes a first target matching network and a second target matching network for use in the first When the antenna ANT1 is the main antenna, the corresponding gates are respectively connected to the first target matching network of the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1, and the second antenna ANT2, so that the first antenna ANT1, the second antenna ANT2 The radio frequency signal received by the second antenna ANT2 performs the first impedance matching; when the second antenna ANT2 is the main antenna, the corresponding gates are respectively connected to the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1, and the second antenna The second target matching network of ANT2 is used to perform second impedance matching on the radio frequency signals received by the first antenna ANT1 and the second antenna ANT2 .

Among them, both the first radio frequency module 11 and the second radio frequency module 12 can be used to support the receiving and processing of radio frequency signals, and the receiving processing can be understood as low noise power amplification processing; the first antenna ANT1 and the second antenna ANT2 are both used to realize radio frequency Transceiver processing of signals, radio frequency signals may 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 structures: array antenna structure, loop antenna structure, patch antenna structure, slot antenna structure, helical antenna structure, strip antenna, monopole antenna, dipole antenna structure, At least one of the pole antennas, etc. Different types of antennas can be used for different frequency bands and combinations of frequency bands. In this embodiment, the type of the antenna is not further limited.

Wherein, the first radio frequency module 11 and the second radio frequency module 12 are switchably connected to the first antenna ANT1 and the second antenna ANT2, so that the main antenna of the target can be determined in the first antenna ANT1 and the second antenna ANT2, so that The RF module connected to the main set antenna of the target can perform transmission and main set reception to distribute the uplink signal on the antenna with better antenna efficiency, which can ensure the reliability of the uplink signal and improve the communication performance of the radio frequency system.

Wherein, 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 . The first impedance matching module 13 includes a first target matching network and a second target matching network. The two antennas ANT2 are connected to carry out the first impedance matching to the radio frequency signals received by the first antenna ANT1 and the second antenna ANT2; , the first antenna ANT1 and the second antenna ANT2 are connected to perform second impedance matching on the radio frequency signals received by the first antenna ANT1 and the second antenna ANT2.

When the first antenna ANT1 is the main set antenna, the first target matching network is selected to match the radio frequency signal on the path between the main set receiving radio frequency module and the first antenna ANT1 and the difference between the diversity receiving radio frequency module and the second antenna ANT2 The first impedance matching is performed on the radio frequency signal on the intermediate path (Fig. 2 takes the radio frequency module received by the first radio frequency module 11 as an example, then the simple schematic network formed by the a matching path and the b matching path as shown in Fig. 2 can be understood as the first target matching network); when the second antenna ANT2 is the main antenna, the second target matching network is selected to receive the RF signal and diversity reception on the path between the main receiving radio frequency module and the second antenna ANT2 The radio frequency signal on the path between the radio frequency module and the first antenna ANT1 carries out the second impedance matching (Fig. 3 takes the radio frequency module received by the first radio frequency module 11 as the main set as an example, then the c matching path as shown in Fig. 3 and d The simple schematic network formed by the matching path 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 main antenna connection and the radio frequency path on the radio frequency system changes, the first impedance matching module 13 can gate the corresponding antenna according to the switching situation of the main antenna. The first target matching network or the second target matching network, so that the target matching network also changes correspondingly with the change of the radio frequency circuit, so as to match the corresponding impedance adjustment on different antenna switching paths, ensure impedance adaptation, and avoid Due to the impedance mismatch caused by the switching of the antenna, the performance is degraded.

It should be noted that when the first antenna ANT1 is the main antenna, since the radio frequency path between the first antenna ANT1 and the first radio frequency module 11 is different from the radio frequency path between the second antenna ANT2 and the second radio frequency module 12, Therefore, the first impedance matching performed by the first target matching network on the radio frequency path between the first antenna ANT1 and the first radio frequency module 11 is different from the first target matching network on the radio frequency between the second antenna ANT2 and the second radio frequency module 12. The first impedance matching performed by the channel; understandably, when the second antenna ANT2 is the main antenna, the second target matching network performs the second impedance matching on the radio frequency channel between the second antenna ANT2 and the first radio frequency module 11 It is different from the second impedance matching performed by the second target matching network on the radio frequency path between the first antenna ANT1 and the second radio frequency 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 adjustments 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 can form a matching path with the first radio frequency module 11 and the first antenna ANT1 respectively, and the other matching unit can be connected with the second radio frequency module respectively 12. The second antenna ANT2 forms another matching circuit. Wherein, 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 are not limited here.

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, and the first impedance matching module 13 is respectively connected with the first radio frequency module 11, the second radio frequency module 12, the first The antenna ANT1 and the second antenna ANT2 are connected, and are used to connect to the first radio frequency module 11, the second radio frequency module 12, the first antenna ANT1 and the second antenna ANT2 respectively when the first antenna ANT1 is the main antenna. The first target matching network is used to carry out first impedance matching to the radio frequency signals received by the first antenna ANT1 and the second antenna ANT2; when the second antenna ANT2 is the main antenna, the corresponding gates are respectively connected to the first radio frequency module 11, The second radio frequency module 12 , the second target matching network of the first antenna ANT1 and the second antenna ANT2 are used to perform second impedance matching on the radio frequency signals received by the first antenna ANT1 and the second antenna ANT2 . Therefore, the first impedance matching module 13 can gate the corresponding first target matching network or the second target matching network according to the switching of the main set of antennas, so as to match the corresponding impedance adjustment on different antenna switching paths, so as to ensure the appropriateness of the impedance. To improve the RF performance of the RF system.

In some embodiments, the first radio frequency module 11 is used to support the transmission and main set reception of radio frequency signals, and the second radio frequency module 12 is used to support diversity reception of radio frequency signals; wherein: the first impedance matching module 13 is used in When the first antenna ANT1 is the main antenna, select the first path between the first radio frequency module 11, the first target matching network, the first antenna ANT1 and the second radio frequency module 12, the first target matching network, and the second antenna The second path between ANT2; used to gate the first radio frequency module 11, the second target matching network, the third path between the second antenna ANT2 and the second radio frequency module when the second antenna ANT2 is the main antenna 12. A fourth path between the second target matching network and the first antenna ANT1.

Wherein, when the first radio frequency module 11 is used to support the transmission and main set reception of radio frequency signals, the first radio frequency module 11 and the first antenna ANT1 as the main set antenna or the first antenna ANT1 as the main set antenna through the first impedance matching module 13 The second antenna ANT2 is connected. The first radio frequency module 11 is configured with a transmission path and a reception path, wherein the transmission path is used to support the power amplification processing of the radio frequency signal output by the radio frequency transceiver 10 and output to the first impedance matching module 13, and the reception path is used to support the pair of radio frequency signals output by the radio frequency transceiver 10. The impedance-matched radio frequency signal is subjected to low-noise amplification processing and output to the radio frequency transceiver 10, so as to realize the transceiving and processing of the radio frequency signal. The first radio frequency module 11 can be understood as a power amplifier module (Power amplifier module integrated duplexer, PA Mid) integrating a power amplifier, a duplexer and a low noise amplifier. The first radio frequency module 11 can be integrated into a chip, and each port configured on the chip can be understood as a radio frequency pin of the PA Mid device.

Wherein, when the second radio frequency module 12 is used to support diversity reception of radio frequency signals, the second radio frequency module 12 is connected to the first antenna ANT1 as a diversity antenna or the second antenna ANT2 as a diversity antenna through a first impedance matching network . The second radio frequency module 12 is configured with a receiving path, which is used to support the low noise amplification processing of the impedance-matched radio frequency signal and output it to the radio frequency transceiver 10, so as to realize the reception and processing of the radio frequency signal. The second radio frequency module 12 may be understood as a low noise amplifier module, which specifically may include a filter and a low noise amplifier.

Wherein, when the first radio frequency module 11 is used to support the transmission and main set reception of radio frequency signals, and the second radio frequency module 12 is used to support the diversity reception of radio frequency signals, the first impedance matching module 13 is used for the first antenna ANT1 When the antenna is the main antenna, select the first path between the first radio frequency module 11, the first target matching network, and the first antenna ANT1, and the second radio frequency module 12, the first target matching network, and the second antenna ANT2 The second path; thus the first target matching network can adjust the corresponding impedance of the radio frequency signal output by the first radio frequency module 11 and then output it to the first antenna ANT1 for transmission, and perform the corresponding impedance adjustment on the radio frequency signal received by the main set of the first antenna ANT1 The corresponding impedance is adjusted and then output to the first radio frequency module 11 ; the first target matching network can also perform corresponding impedance adjustment on the radio frequency signal received by the second antenna ANT2 in diversity and then output to the second radio frequency module 12 . The first impedance matching module 13 is also used to gate the third path between the first radio frequency module 11, the second target matching network, the second antenna ANT2 and the second radio frequency module 12 when the second antenna ANT2 is the main antenna. , the second target matching network, and the fourth path between the first antenna ANT1; so that the first target matching network can adjust the corresponding impedance of the RF signal output by the first radio frequency module 11 and output it to the second antenna ANT2 for transmission , the RF signal received by the main set of the second antenna ANT2 is output to the first RF module 11 after corresponding impedance adjustment; the first target matching network can also output the corresponding impedance adjustment to the RF signal received by the diversity of the first antenna ANT1 to the second radio frequency module 12.

In some embodiments, when the first radio frequency module 11 is used to support the transmission and main set reception of radio frequency signals, and the second radio frequency module 12 is used to support diversity reception of radio frequency signals, as shown in FIG. 4, the first target The 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 also includes: a first gating unit 135 and a second Two gating units 136 .

The first gating unit 135 is respectively connected to the first radio frequency module 11, the second radio frequency module 12, the first matching unit 131, the second matching unit 132, the third matching unit 133 and the fourth matching unit 134; the second gating The unit 136 is respectively 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 .

The first gating unit 135 and the second gating unit 136 are used to jointly 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 antenna, and respectively Be connected to the second matching unit 132 between the second radio frequency module 12 and the second antenna ANT2; the first gating unit 135 and the second gating unit 136 are also used for common gating when the second antenna ANT2 is the main antenna The third matching unit 133 is connected to the first radio frequency module 11 and the second antenna ANT2 respectively, and the fourth matching unit 134 is connected to the second radio frequency module 12 and the first antenna ANT1 respectively.

Among them, 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 to respectively match the radio frequency on the radio frequency path when the first antenna ANT1 is the main antenna. Impedance adjustment of the signal; 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 used for matching the RF paths on the second antenna ANT2 when the second antenna ANT2 is the main antenna. RF signal for impedance adjustment. Due to the differences in routing on different RF paths, corresponding to the differences in routing, the impedance adjustment value of different matching units can be different, and the adjustment should be carried out according to the actual path conditions, so as to improve the adaptability of impedance.

Wherein, the first gating unit 135 is respectively connected with the first radio frequency module 11, the second radio frequency module 12, the first matching unit 131, the second matching unit 132, the third matching unit 133 and the fourth matching unit 134; The gating unit 136 is respectively 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, thereby passing through the first gating unit 135 and the second gating unit 136, on the one hand, can choose to switchably connect the first radio frequency module 11 and the second radio frequency module 12 to the first antenna ANT1 and the second antenna ANT2, from the first antenna ANT1 to the second antenna ANT2 Determine the main set antenna of the target, so that the radio frequency module connected to the main set antenna of the target can perform transmission and main set reception, so as to distribute the uplink signal on the antenna with better antenna efficiency, which can ensure the reliability of the uplink signal to improve The communication performance of the radio frequency system; on the other hand, the impedance matching unit corresponding to the switching path of different main antennas can be selected to perform corresponding impedance adjustment on different antenna switching paths to ensure impedance adaptation and improve RF performance of RF systems.

Specifically, when the first antenna ANT1 is the main antenna, the first gating unit 135 and the second gating unit 136 are used to jointly gate the first matching unit connected to the first radio frequency module 11 and the first antenna ANT1 respectively. 131 to conduct the first path between the first radio frequency module 11, the first matching unit 131, and the first antenna ANT1, the first radio frequency module 11 is connected to the first antenna ANT1 and the impedance is adjusted by the first matching unit 131, Make the load impedance of the first radio frequency module 11 match the impedance of the first antenna ANT1; 12. The second path between the second matching unit 132 and the second antenna ANT2 is turned on, the second radio frequency module 12 is connected to the second antenna ANT2 and the impedance adjustment is performed by the second matching unit 132, so that the second radio frequency module 12 The load impedance matches that of the second antenna ANT2. Wherein, in the embodiment shown in FIG. 4, the first path and the second path can be understood as two through-state paths, and the matching on the two through-state paths can be ensured by the first matching unit 131 and the second matching unit 132. impedance.

Specifically, when the second antenna ANT2 is the main antenna, the first gate unit 135 and the second gate unit 136 jointly gate the third matching unit 133 respectively connected to the first radio frequency module 11 and the second antenna ANT2 to Make the third path between the first radio frequency module 11, the third matching unit 133, and the second antenna ANT2 conduct, the first radio frequency module 11 is connected to the second antenna ANT2 and the impedance adjustment is performed by the third matching unit 133, so that the first The load impedance of a radio frequency module 11 is matched with the impedance of the second antenna ANT2; The fourth path between the matching unit 134 and the first antenna ANT1 is turned on, the second radio frequency module 12 is connected to the first antenna ANT1 and the impedance is adjusted by the fourth matching unit 134, so that the load impedance of the second radio frequency module 12 is the same as that of the first antenna ANT1. The impedance of an antenna ANT1 is matched. Wherein, the third path and the fourth path can be understood as two cross-state paths in the embodiment shown in FIG. impedance.

Therefore, through the switching of the first gating unit 135 and the second gating unit 136, the normal switching of the crossover state and the calling scene of the matching network can be realized, and the straight-through state and the crossover state are separated to form independent impedance matching networks, which are used in the straight-through state The matching network in the straight-through state is used to adjust the matching impedance of the path. In the cross state, the matching network in the cross state is used to adjust the matching impedance of the path. While ensuring a good impedance matching state in the straight-through state, the cross state can also be avoided. The risk of matching mismatch in the lower path, so that the radio frequency performance in both states can be guaranteed at the same time.

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 set in each matching network, but in other situations where modulation is required, the matching unit may not be limited to two, Specifically, adjust according to actual needs. For example, in order to avoid damage to the matching unit, two first matching units 131 and two second matching units 132 can also be set. When the first target matching network is required to perform impedance matching, from the two One first matching unit 131 and one second matching unit 132 are selected among the first matching unit 131 and the two second matching units 132 .

In the above embodiment, both the first gating unit 135 and the second gating unit 136 may include switching devices, and the matching units on different paths are gated through the switching devices, for example, the first gating unit 135 and the second gating unit 136 may include a single pole double throw switch or a double pole four throw switch, and the selection of the device may be determined based on the area and layout of the device.

Optionally, as shown in FIG. 5 (FIG. 5 takes the module received by the first radio frequency module 11 as an example to illustrate), the first gating unit 135 includes: a first single-pole double-throw switch SPDT1 and a second single-pole double-throw switch SPDT1 and a second single-pole double-throw switch. Throw switch SPDT2.

The first single-pole double-throw switch SPDT1, the first end of the first single-pole double-throw switch SPDT1 (see the contact 1 of SPDT1 in the figure) is connected with the first radio frequency module 11, the two second ends of the first single-pole double-throw switch ( Referring to the contact 2 and the contact 3 of SPDT1 in the figure) are respectively connected with the first matching unit 131 and the third matching unit 133 in one-to-one correspondence; the second single-pole double-throw switch, the first end of the second single-pole double-throw switch (see The contact 1) of SPDT2 in the figure is connected to the second radio frequency module 12, and the two second ends of the second single-pole double-throw switch (see the contact 2 and contact 3 of SPDT2 in the figure) are respectively connected to the second matching unit 132, The fourth matching units 134 are connected in one-to-one correspondence.

Specifically, when the first single-pole double-throw switch SPDT1 strobes contact 1 and contact 2, the strobe is respectively connected to the path between the first radio frequency module 11 and the first matching unit 131, and the second single-pole double-throw switch When the SPDT2 gates the contact 1 and the contact 2, it gates the path between the second radio frequency module 12 and the second matching unit 132 . When the first single-pole double-throw switch SPDT1 strobes contact 1 and contact 3, the strobe is respectively connected to the path between the first radio frequency module 11 and the third matching unit 133, and the second single-pole double-throw switch SPDT2 is strobed When contact 1 and contact 3 are connected, the channel between the second radio frequency module 12 and the fourth matching unit 134 is selected.

Optionally, as shown in FIG. 5 , the second gating unit 136 includes: a third single-pole double-throw switch SPDT3, the first end of the third single-pole double-throw switch SPDT3 is connected to the first antenna ANT1, and the third single-pole double-throw switch SPDT3 The two second ends of SPDT3 are respectively connected to the first matching unit 131 and the fourth matching unit 134 in one-to-one correspondence; the fourth single-pole double-throw switch SPDT4, and the first end of the fourth single-pole double-throw switch SPDT4 is connected to the second antenna ANT2 , the two second terminals of the fourth single-pole double-throw switch SPDT4 are respectively connected to the second matching unit 132 and the third matching unit 133 in a one-to-one correspondence.

Specifically, when the third single-pole double-throw switch SPDT3 strobes contact 1 and contact 2 and the fourth single-pole double-throw switch SPDT4 strobes contact 1 and contact 2, the third single-pole double-throw switch SPDT3 and the fourth single-pole double-throw switch SPDT3 The double throw switch SPDT4 corresponds to gate 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 ANT2 respectively. When the third single pole double throw switch SPDT3 strobes contact 1 and contact 3 and the fourth single pole double throw switch SPDT4 strobes contact 1 and contact 3, the third single pole double throw switch SPDT3 and the fourth single pole double throw switch SPDT4 corresponds to gating the path between the fourth matching unit 134 and the first antenna ANT1 , and gating the path between the third matching unit 133 and the second antenna ANT2 respectively.

Optionally, 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, the two first ends of the first double-pole four-throw switch DP4T1 are respectively connected to the first radio frequency module 11 and the second radio frequency module 12 in one-to-one correspondence, and the four ends of the first double-pole four-throw switch DP4T1 The two second ends are respectively connected to the first matching unit 131 , the third matching unit 133 , the second matching unit 132 and the fourth matching unit 134 in one-to-one correspondence. Specifically, when contact 1 of the first double-pole four-throw switch DP4T1 selects contact 3 and contact 2 selects contact 6, the gate of the first double-pole four-throw switch DP4T1 is respectively connected to the first radio frequency module 11 , the first matching unit 131 of the first antenna ANT1, and the second matching unit 132 respectively connected between the second radio frequency module 12 and the second antenna ANT2. When the contact 1 of the first double-pole four-throw switch DP4T1 selects the contact 4 and the contact 2 selects the contact 5, the gate of the first double-pole four-throw switch DP4T1 is connected to the first radio frequency module 11 and the second radio frequency module 11 respectively. The third matching unit 133 of the antenna ANT2, and the fourth matching unit 134 respectively connected between the second radio frequency module 12 and the first antenna ANT1.

Optionally, as shown in FIG. 6 , the second gating unit 136 includes: a second double-pole four-throw switch DP4T2, and the two first ends of the second double-pole four-throw switch DP4T2 are connected to the first antenna ANT1 and the second antenna ANT1 respectively. The antenna ANT2 is connected in one-to-one correspondence, and the four second ends of the second double-pole four-throw switch DP4T2 are respectively connected to 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 . Specifically, when contact 1 of the second double-pole four-throw switch DP4T2 selects contact 3 and contact 2 selects contact 6, the second double-pole four-throw switch DP4T2 selects the first matching unit 131, the first The path between the antenna ANT1, and the path between the second matching unit 132 and the second antenna ANT2; At point 5, the second DP4T switch DP4T2 selects the path between the fourth matching unit 134 and the first antenna ANT1, and selects the path between the third matching unit 133 and the second antenna ANT2.

In the above embodiments, the first matching unit 131 , the second matching unit 132 , the third matching unit 133 , and the fourth matching unit 134 can adjust the impedance in series-parallel connection through tunable inductors, capacitors, and resistors. Among them, tunable inductors, capacitors, and resistors can be connected in series and parallel to form different types of impedance matching units, such as π-type impedance matching units, L-type impedance matching units, and T-type impedance matching units. 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 π-type impedance matching unit. Optionally, each π-type impedance matching unit can be as shown in the figure (in which Z can be selected from inductors, capacitors, resistors and other devices), further optionally, as shown in Figures 5 and 6, the first matching unit 131 , the second matching unit 132 , the third matching unit 133 and the fourth matching unit 134 are all π-type impedance matching units.

In some embodiments, the radio frequency transceiver 10 is also connected to the controlled end of the first gating unit 135 and the controlled end of the second gating unit 136 respectively, for receiving data from the first antenna ANT1 and the second antenna ANT2 The quality information of the radio frequency signal configures the main set antenna, and controls the first gating unit 135 and the second gating unit 136 to jointly gate the first target matching network or jointly gate the second target matching network according to the main set antenna. Specifically, the radio frequency transceiver 10 determines and configures the main set antenna from the first antenna ANT1 and the second antenna ANT2 according to the quality information of the radio frequency signals received by the first antenna ANT1 and the second antenna ANT2, and configures the first antenna ANT1 as Control the first gating unit 135 and the second gating unit 136 to gating the first target matching network when the main antenna is used, and control the first gating unit 135 and the second gating unit 135 when configuring the second antenna ANT2 as the main antenna. Unit 136 collectively gates the second target matching network.

Wherein, the controlled end of the first gating unit 135 can be understood as the controlled end of the internal switch of the first gating unit 135, and the controlled end of the second gating unit 136 can be understood as the controlled end of the internal switch of the second gating unit 136. controlled end. 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 .

Wherein, the quality information may include original and processed information associated with radio performance metrics of the signal, 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 NoiseRatio, SNR), Rank of MIMO channel matrix (Rank), Carrier to Interference plus Noise Ratio (Carrier to Interference plusNoise Ratio, RS-CINR), Frame Error Rate, Bit Error Rate, Reference Signal reception quality (Reference signal reception quality, RSRQ), etc. Further optionally, the radio frequency transceiver 10 may pre-store configuration information of connections between each circuit and each antenna. The configuration information may include identification information of the antenna, identification information of each circuit, and control logic information of switches on the radio frequency paths between the first radio frequency module 11 and the second radio frequency module 12 and different switchable antennas respectively.

Take the network information as the received signal strength as an example: the first antenna ANT1 can be configured as the default main antenna, and the second antenna ANT2 can be configured as the default diversity antenna; where: if the second antenna ANT2 receives the radio frequency signal The difference between the second signal strength and the first signal strength of the radio frequency signal received by the first antenna ANT1 is greater than or equal to the preset threshold within the preset time period, then the second antenna ANT2 is configured as the main antenna, and the first antenna ANT1 is Diversity antenna.

Specifically, when the first antenna ANT1 is configured as the default main antenna, and the second antenna ANT2 is configured as the default diversity antenna, the radio frequency transceiver 10 receives the signals received by the first antenna through the first radio frequency module 11 and the second radio frequency module 12 respectively. ANT1 and the second antenna ANT2 receive the radio frequency signal, and control the switching of the antenna according to the first signal strength of the radio frequency signal received by the first antenna ANT1 and the second signal strength of the radio frequency signal received by the second antenna ANT2. More specifically, if the difference between the second received signal strength minus the first received signal strength is greater than or equal to a preset threshold within a preset time, then the second antenna ANT2 is used as the main antenna. After determining the target antenna, the radio frequency transceiver 10 can control the relevant logic switch of the radio frequency system to turn on the transceiver path between the second antenna ANT2 and the first radio frequency module 11, so that the second antenna ANT2 can be used to realize radio frequency transmission and main collection. Receive to improve the communication quality of radio frequency signals. If the difference is smaller than the preset threshold, continue to use the first antenna ANT1 as the main antenna, and maintain the current working state.

Wherein, the preset thresholds are all values greater than zero, and the size of the preset thresholds can be set as required. By setting the determination condition of the preset threshold, it is possible to prevent frequent switching between antennas due to the fact that the signal receiving strength of the antenna may be changing all the time, thereby reducing the influence of the transmission efficiency of the antenna.

In some embodiments, the number of the first antenna ANT1 in the above embodiment is multiple and the number of the first target matching network is multiple, and the multiple first target matching networks correspond to the multiple first antenna ANT1 one-to-one; wherein : The first impedance matching module 13 is further configured to gate the corresponding first target matching network when a first antenna ANT1 among the plurality of first antennas ANT1 is the main antenna. Specifically, the first target matching network corresponding to each first antenna ANT1 is pre-configured as the main antenna, so that when one of the first antennas ANT1 is configured as the main antenna, the corresponding first target matching network is selected to be turned on. network. Therefore, the main set of antennas can be selected from more first antennas ANT1, and each antenna switching situation is matched with a corresponding impedance adjustment, so as to further improve radio frequency performance.

In some embodiments, the number of the second antenna ANT2 in the above embodiment is multiple and the number of the second target matching network is multiple, and the multiple second target matching networks correspond to the multiple second antenna ANT2 one-to-one; wherein : The first impedance matching module 13 is further configured to gate the corresponding second target matching network when one of the multiple second antennas ANT2 is the main antenna. Specifically, the second target matching network corresponding to each second antenna ANT2 is pre-configured as the main antenna, so that when one of the second antennas ANT2 is configured as the main antenna, the corresponding second target matching network is selected to be turned on. network. Therefore, the main antenna can be selected from more second antennas ANT2, and each antenna switching situation is matched with a corresponding impedance adjustment, so as to further improve the radio frequency performance.

It should be noted that when the number of the first antenna ANT1 is multiple, the number of the second antenna ANT2 can be one or more; when the number of the second antenna ANT2 is multiple, the number of the first antenna ANT1 can be One or more, not limited here. Wherein, when the number of the first antenna ANT1 and/or the second antenna ANT2 is multiple, the first gating unit 135 in the first impedance matching module 13 may correspondingly include a plurality of single-pole double-throw switches or double-pole multi-throw switch, the second gating unit 136 can correspondingly include a plurality of single-pole double-throw switches or double-pole multi-throw switches, so as to gate different target matching networks through the first gating unit 135 and the second gating unit 136, and turn on Different RF paths.

In some embodiments, as shown in FIG. 7 , the radio frequency system further includes: a second impedance matching module 14 and/or a third impedance matching module 15 .

Wherein, the second impedance matching module 14 is arranged between the first antenna ANT1 and the first impedance matching module 13, and is used for performing impedance matching on the radio frequency signal received by the first antenna ANT1. Therefore, the impedance on the path where it is located is further adjusted by the second impedance matching module 14, and the impedance matching between the first antenna ANT1 and the radio frequency module connected thereto is further improved.

Wherein, the third impedance matching module 15 is arranged between the second antenna ANT2 and the first impedance matching module 13, and is used for impedance matching the radio frequency signal received by the second antenna ANT2.

Optionally, the second impedance matching module 14 and the third impedance matching module 15 can perform impedance adjustment in a series-parallel manner through tunable inductors, capacitors, resistors, and the like. Among them, tunable inductors, capacitors, and resistors can be connected in series and parallel to form different types of impedance matching units, such as π-type impedance matching units, L-type impedance matching units, and T-type impedance matching units. Optionally, at least one of the second impedance matching module 14 and the third impedance matching module 15 is a π-type impedance matching unit. Optionally, each π-type impedance matching unit can be as shown in the figure (where Z can be selected from inductors, capacitors, resistors and other devices), and optionally, the second impedance matching module 14 and the third impedance matching module 15 are both π-type impedance matching unit. Further optionally, the π-type impedance matching units of the second impedance matching module 14 and the third impedance matching module 15 may be as shown in FIG. 8 .

The division of modules and units in the above radio frequency system is only for illustration. In other embodiments, the radio frequency system may be divided into different modules as required to complete all or part of the functions of the above radio frequency system.

The embodiment of the present application also provides a communication device. The communication device may include the radio frequency system in any of the above embodiments. When the first antenna ANT1 is the main antenna, the radio frequency system is connected to the first radio frequency module 11 correspondingly. , the first target matching network of the second radio frequency module 12, the first antenna ANT1, and the second antenna ANT2, to carry out first impedance matching to the radio frequency signals received by the first antenna ANT1 and the second antenna ANT2; When the main set of antennas, the corresponding gates are respectively connected to the second target matching network 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 control the first antenna ANT1 and the second antenna ANT2 The received radio frequency signal is subjected to second impedance matching. Therefore, the radio frequency system can select the corresponding first target matching network or the second target matching network according to the requirements of main set antenna switching, so that the first impedance matching module 13 can match corresponding impedance adjustments on different antenna switching paths. Therefore, the communication device can ensure impedance adaptation, improve radio frequency performance, and thereby improve user experience.

Further, as shown in FIG. 9, the communication device is a mobile phone 20 as an example for illustration. Specifically, as shown in FIG. 9, the mobile phone 20 may include a memory 21 (which optionally includes one or more computer-readable storage media), processor 22, peripheral device interface 23, radio frequency system 24, input/output (I/O) subsystem 26. These components optionally communicate via one or more communication buses or signal lines 29 . Those skilled in the art can understand that the mobile phone 20 shown in FIG. 9 is not limited to the mobile phone, and may include more or less components than shown in the figure, or combine some components, or arrange different 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 optionally also includes non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplarily, the software components stored in the memory 21 include an operating system 211 , a communication module (or an instruction set) 212 , a global positioning system (GPS) module (or an instruction set) 213 and the like.

Processor 22 and other control circuitry, such as control circuitry in radio frequency system 24 , may be used to control the operation of handset 20 . The processor 22 may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management modules, audio codec chips, application specific integrated circuits, and the like.

Processor 22 may be configured to implement control algorithms that control the use of antennas in handset 20 . The processor 22 may also issue control commands and the like for controlling switches in the radio frequency system 24 .

I/O subsystem 26 couples input/output peripherals on handset 20 such as a keypad and other input control devices to peripherals interface 23 . 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, and the like. Exemplarily, 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 output from handset 20 . For example, the user can turn on or turn off the mobile phone by pressing the button 261 .

The radio frequency system 24 may be the radio frequency system in any of the foregoing embodiments.

In the description of this specification, descriptions with reference to the terms "one of the embodiments", "optionally" and the like mean that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or embodiment of the present invention. example. 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 can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

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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