RF switch chips and RF front-end modules

Abstract

This application discloses an RF switch chip and an RF front-end module. The RF switch chip includes an RF switch module and a bare die. A first connecting line and a second connecting line in the RF switch module are axially symmetrical about a specified axis, and at least a portion of the multiple signal ports are located on the specified axis. The RF switch module includes multiple switching units, which are respectively connected between the first connecting line and the multiple signal ports, and also respectively connected between the second connecting line and the multiple signal ports. Because the first connecting line and the second connecting line are axially symmetrical about the specified axis, when the switching unit corresponding to the signal port located on the specified axis respectively conducts the signal branch between the signal port and the first connecting line and the signal branch between the signal port and the second connecting line, the signal transmission distances corresponding to the two signal branches are approximately equal, thereby improving the signal balance of the two RF signals and increasing the transmission efficiency of the two RF signals.

Description

Technical Field

[0001] This application relates to the field of radio frequency technology, and more specifically, to a radio frequency switch chip and a radio frequency front-end module. Background Technology

[0002] Currently, radio frequency (RF) front-end modules are widely used in wireless communication, the Internet of Things (IoT), smart homes, and other fields. They can process RF signals (e.g., power amplification, modulation and demodulation) to complete the tasks of receiving and transmitting RF signals.

[0003] In existing radio frequency (RF) front-end modules, RF switch chips are an important component. RF switch chips integrate RF switches (such as antenna switches), which can be used to switch the transmission of RF signals in different frequency bands to ensure the normal operation of various chips and components in the RF front-end module.

[0004] However, existing RF switch chips suffer from poor performance. Summary of the Invention

[0005] This application provides an embodiment of an RF switch chip and an RF front-end module.

[0006] According to a first aspect of this application, an embodiment of this application provides a radio frequency (RF) switch chip, which includes a bare die and an RF switch module disposed on the bare die. The RF switch module includes a first connecting line, a second connecting line, and multiple signal ports. The first and second connecting lines are symmetrically arranged about a designated axis. The first connecting line is used to connect to a first antenna port, and the second connecting line is used to connect to a second antenna port. At least a portion of the multiple signal ports are located on the designated axis. The RF switch module includes multiple switching units, which are respectively connected between the first connecting line and the multiple signal ports, allowing the first connecting line to be selectively electrically connected to the multiple signal ports. The multiple switching units are also respectively connected between the second connecting line and the multiple signal ports, allowing the second connecting line to be selectively electrically connected to the multiple signal ports.

[0007] This application provides a radio frequency (RF) switch chip, which may include a bare die and an RF switch module. The RF switch module includes a first connection line, a second connection line, and multiple signal ports. Specifically, the first connection line is used to connect to a first antenna port, and the second connection line is used to connect to a second antenna port. The "first antenna port" and "second antenna port" are respectively adapted to connect different antennas to achieve the reception and / or transmission of at least two RF signals. For example, when the RF switch chip is integrated into an RF front-end module, the "first antenna port" and "second antenna port" can respectively correspond to two antennas connected to the RF front-end module.

[0008] At least some of the multiple signal ports are located on a designated axis. Since the first and second connecting lines are symmetrically arranged about the designated axis, the distances between the signal ports located on the designated axis and the first and second connecting lines are approximately equal. That is, when the switching unit corresponding to the signal port respectively activates the signal branch between the signal port and the first connecting line and the signal branch between the signal port and the second connecting line, the lengths of the two signal branches are approximately equal. This improves the signal balance of the two RF signals during transmission, ensuring that the performance indicators of the two RF signals are closer during transmission, thereby improving the signal transmission quality and efficiency of the two RF signals and giving the RF switch chip better operating performance.

[0009] Here, we will explain "signal balance". Since the signal ports located on the specified axis will respectively conduct the signal branches between the first connection line and the second connection line, "signal balance" can be measured according to the performance indicators of the two RF signals during transmission (e.g., insertion loss IL, return loss RL, harmonic performance HB, etc.). That is, the closer the performance indicators of the two RF signals are, the better the signal balance of the two RF signals.

[0010] According to a second aspect of this application, embodiments of this application also provide a radio frequency (RF) switch chip, which includes a bare die, an RF switch module, a first coupling module, and a second coupling module, with the RF switch module disposed on the bare die. The RF switch module includes a first connecting line, a second connecting line, and a signal port. The first connecting line is used to connect to a first antenna port, and the second connecting line is used to connect to a second antenna port. The RF switch module includes a switching unit disposed between the first and second connecting lines; the switching unit is connected to the signal port so that the signal port can be selectively electrically connected to the first and second connecting lines. The first coupling module is disposed on the bare die; the first coupling module is coupled to the first connecting line and is used to output a first detection signal, which reflects the signal power of the RF signal output to the first antenna port. The second coupling module is disposed on the bare die; the second coupling module is coupled to the second connecting line and is used to output a second detection signal, which reflects the signal power of the RF signal output to the second antenna port. The second coupling module and the first coupling module are both located on the same side of the RF switch module.

[0011] This application also provides a radio frequency (RF) switch chip, which may include a bare die, an RF switch module, a first coupling module, and a second coupling module. The RF switch module includes a first connecting line, a second connecting line, and a signal port. Specifically, the first connecting line is used to connect to a first antenna port, and the second connecting line is used to connect to a second antenna port. The "first antenna port" and "second antenna port" are respectively adapted to connect to different antennas to achieve the reception and / or transmission of at least two RF signals. For example, when the RF switch chip is integrated into an RF front-end module, the "first antenna port" and "second antenna port" can respectively correspond to the two antennas connected to the RF front-end module. Since the signal port in this embodiment can be selectively electrically connected to the first and second connecting lines through a switching unit, the signal port can receive and / or transmit RF signals at different antenna ports.

[0012] Furthermore, the first coupling module is coupled to the first connecting line, and the second coupling module is coupled to the second connecting line. Different coupling modules can detect the signal power of the RF signal output to the corresponding antenna port, enabling the subsequent RF front-end module equipped with the RF switch chip to dynamically adjust for excessively powerful RF signals, ensuring normal RF signal transmission. In addition, the RF switch module, the first coupling module, and the second coupling module are all mounted on the bare die, and the second coupling module and the first coupling module are located on the same side of the RF switch module, making the overall hardware layout of the RF switch chip more compact and reasonable, thus achieving miniaturized design of the RF switch chip.

[0013] According to a third aspect of this application, embodiments of this application also provide a radio frequency front-end module, the radio frequency front-end module including a substrate and the above-mentioned radio frequency switch chip, wherein the radio frequency switch chip is disposed on the substrate. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of the radio frequency front-end module provided in the embodiments of this application.

[0016] Figure 2 yes Figure 1 The diagram shows a structural schematic of an RF switch chip in an RF front-end module.

[0017] Figure 3This is a schematic diagram of the circuit structure of the radio frequency switch chip provided in the embodiments of this application.

[0018] Figure 4 yes Figure 2 The diagram shows the structure of the first switching unit in the RF switch chip.

[0019] Figure 5 yes Figure 2 The diagram shows the structure of the first and second switching units in the RF switch chip.

[0020] Figure 6 yes Figure 2 The diagram shows the structure of the third and fourth switching units in the RF switch chip.

[0021] Figure 7 yes Figure 2 The diagram shows the structure of the fifth switching unit in the RF switch chip.

[0022] Figure 8 yes Figure 1 The diagram shows another structural schematic of the RF switch chip in the RF front-end module.

[0023] Figure 9 yes Figure 1 This is another structural diagram of the RF switch chip in the RF front-end module shown. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0025] This application provides a radio frequency front-end module 200, which is a component that integrates two or more discrete devices such as radio frequency switches, low noise amplifiers, filters, duplexers, and power amplifiers (PA) into an independent module, thereby improving integration and hardware performance, and miniaturizing the size.

[0026] Please see Figure 1The radio frequency front-end module 200 may include a substrate 210 and a radio frequency switch chip 100. The substrate 210 is used to fix and support the radio frequency switch chip 100 and other devices included in the radio frequency front-end module 200 (e.g., power amplifiers, filters, duplexers, etc.). The substrate 210 may be provided with a first antenna interface 212 and a second antenna interface 214, wherein the first antenna interface 212 is used to connect the first antenna ANT1, and the second antenna interface 214 is used to connect the second antenna ANT2.

[0027] The RF switch chip 100 is disposed on the substrate 210. For example, the RF switch chip 100 can be fixed on the substrate 210 by a flip-chip process or a wire bonding process. The RF switch chip 100 is connected to the first antenna interface 212 and the second antenna interface 214. It is used to conduct the signal branch between the first antenna interface 212 and other devices (e.g., duplexers, power amplifiers) included in the RF front-end module 200, so that RF signals of different frequency bands generated by the RF front-end module 200 can be output to the first antenna ANT1 through the RF switch chip 100, or the RF signals received by the first antenna ANT1 can be input into the RF front-end module 200. The RF switch chip 100 is also used to conduct the signal branch between the second antenna interface 214 and other devices (e.g., duplexers, power amplifiers) included in the RF front-end module 200, so that RF signals of different frequency bands generated by the RF front-end module 200 can be output to the second antenna ANT2 through the RF switch chip 100, or the RF signals received by the second antenna ANT2 can be input into the RF front-end module 200.

[0028] Please see Figure 2The first embodiment of this application provides a radio frequency (RF) switch chip 100, which may include a bare die 10 and an RF switch module 30 disposed on the bare die 10. The RF switch module 30 has a first connecting line 301, a second connecting line 302, and a plurality of signal ports 320. The first connecting line 301 and the second connecting line 302 are symmetrically arranged about a designated axis L. The first connecting line 301 is used to connect to a first antenna port 306, and the second connecting line 302 is used to connect to a second antenna port 307. At least a portion of the plurality of signal ports 320 are located on the designated axis L. Because the first connecting line 301 and the second connecting line 302 are symmetrically arranged about the designated axis L, the difference between the signal branch length of the signal port 320 located on the designated axis L and the signal branch length between the first connecting line 301 and the second connecting line 302 is less than a first error threshold. The smaller the first error threshold, the better; for example, the first error threshold may be less than or equal to 0.5 mm. Ideally, the first error threshold is 0, that is, the length of the signal branch between the signal port 320 on the specified axis L and the first connecting line 301 is exactly equal to the length of the signal branch between the signal port 320 on the specified axis L and the second connecting line 302.

[0029] The radio frequency switch module 30 may include a plurality of switch units 340, which are respectively connected between a first connection line 301 and a plurality of signal ports 320, so that the first connection line 301 can be electrically connected to the plurality of signal ports 320; the plurality of switch units 340 are also respectively connected between a second connection line 302 and a plurality of signal ports 320, so that the second connection line 302 can be electrically connected to the plurality of signal ports 320.

[0030] Therefore, when the switch unit 340 corresponding to the signal port 320 located on the specified axis L conducts the signal branch between the signal port 320 and the first connecting line 301, and when it conducts the signal branch between the signal port 320 and the second connecting line 302, the lengths of the two signal branches are approximately equal. This improves the signal balance of the two RF signals during transmission, ensuring that the performance indicators of the two RF signals are closer during transmission. This, in turn, improves the signal transmission quality and efficiency of the two RF signals, giving the RF switch chip 100 better working performance.

[0031] Here, we explain "signal balance." Since the signal port 320 located on the designated axis L will respectively connect the signal branch with the first connecting line 301 and the signal branch with the second connecting line 302, "signal balance" can be measured based on the performance indicators of the two RF signals during transmission (e.g., insertion loss IL, return loss RL, harmonic performance HB, etc.). That is, the closer the performance indicators of the two RF signals are, the better the signal balance of the two RF signals. Ideally, the performance indicators of the two RF signals are exactly the same, indicating that the signal balance of the two RF signals is the highest at this time.

[0032] The specific implementation of the RF switch chip 100 is described in detail below.

[0033] In this embodiment, bare die 10 refers to an electronic chip that is directly exposed without packaging, finished modules, or connectors. It serves to fix and support the RF switch module 30 and other devices included in the RF switch chip 100. Specifically, bare die 10 can be made of materials such as silicon, gallium arsenide, or silicon carbide to ensure that bare die 10 has good thermal stability, mechanical strength, and dimensional stability.

[0034] exist Figure 2 In the illustrated embodiment, the bare core 10 can be generally rectangular. The bare core 10 can have opposing first sides 101 and second sides 103, which can be two parallel sides of the bare core 10. Specifically, the first sides 101 and second sides 103 are axially symmetrical about a specified axis L. That is, the specified axis L in this embodiment can be the central axis of the bare core 10.

[0035] The bare core 10 may also have a third side 106 and a fourth side 108, wherein the first side 101, the third side 106, the second side 103, and the fourth side 108 are connected sequentially to define the outer contour of the bare core 10. For ease of description of the features below, the "extending direction of the first side 101 and the second side 103" is denoted as the first direction X, and the "extending direction of the third side 106 and the fourth side 108" is denoted as the second direction Y, wherein the first direction X and the second direction Y intersect. In some possible embodiments, the first direction X and the second direction Y are perpendicular.

[0036] In this embodiment, the RF switch module 30 may include a first connecting line 301, a second connecting line 302, and multiple signal ports 320. The first connecting line 301 is located between a designated axis L and a first side 101, and is disposed adjacent to the first side 101; the second connecting line 302 is located between the designated axis L and a second side 103, and is disposed adjacent to the second side 103. Specifically, the first connecting line 301 and the second connecting line 302 may each be two metal traces; the first connecting line 301 is used to connect to the first antenna port 306, and the second connecting line 302 is used to connect to the second antenna port 307.

[0037] Here, "first antenna port 306" and "second antenna port 307" can be chip ports on the bare die 10, respectively, which are suitable for connecting different antennas to realize the reception and / or transmission of at least two radio frequency signals. For example, when the radio frequency switch chip 100 is integrated in the radio frequency front-end module 200, the first antenna port 306 can be connected to the first antenna interface 212 on the substrate 210, and the second antenna port 307 can be connected to the second antenna interface 214 on the substrate 210.

[0038] Multiple signal ports 320 are used to transmit radio frequency signals of different frequency bands (e.g., B1 band, B41 band, etc.). Specifically, the multiple signal ports 320 can be chip ports on the bare die 10. When the radio frequency switch chip 100 is integrated in the radio frequency front-end module 200, the multiple signal ports 320 can be connected to other devices (e.g., duplexers, power amplifiers, etc.) disposed on the substrate 210. The signal ports 320 can also be used as external ports, which is not specifically limited in this embodiment.

[0039] In this embodiment, at least a portion of the plurality of signal ports 320 are located on a designated axis L. "At least a portion" can be understood as all of the plurality of signal ports 320 being located on the designated axis L; or, a portion of the plurality of signal ports 320 being located on the designated axis L, while another portion is located off-axis L. The specific arrangement of the plurality of signal ports 320 will be described in detail below.

[0040] In some possible embodiments, the RF switch module 30 may also have multiple first peripheral ports (not shown in the figure) and multiple second peripheral ports (not shown in the figure). The multiple first peripheral ports may be distributed and connected to the first connection line 301 for connecting different switch units 340. The multiple second peripheral ports may be distributed and connected to the second connection line 302 for connecting different switch units 340. Specifically, the multiple first peripheral ports and the multiple second peripheral ports may be axially symmetrical about a specified axis L.

[0041] In this embodiment, the radio frequency switch module 30 may include a plurality of switch units 340, wherein the switch unit 340 is connected between the corresponding signal port 320 and the first connection line 301, and is connected between the corresponding signal port 320 and the second connection line 302, so as to conduct the signal branch between the signal port 320 and the first connection line 301, and to conduct the signal branch between the signal port 320 and the second connection line 301.

[0042] Please see Figure 3 , Figure 3 This is a circuit diagram corresponding to the RF switch chip 100 provided in the first embodiment of this application. The RF switch module 30 has eight signal ports 320, namely B1 port, B2 port, B34 port, B7 port, B40 port, B41 port, HB_TRX_AUX1 port, and MHB_TRX1_DIV port. Here, "B1 port" refers to signal port 320 used for transmitting RF signals in the B1 frequency band. The HB_TRX_AUX1 port and the MHB_TRX1_DIV port are two external ports used for connecting other devices. Figure 3 In the RF switch module 30, each "dashed line" represents a signal branch.

[0043] The specific implementation of signal port 320 and the corresponding switching unit 340 is described below.

[0044] Please see Figure 4 The plurality of signal ports 320 may include a first signal port 321, which is located on a designated axis L. The plurality of switch units 340 may include a first switch unit 341, which is disposed between a first connecting line 301 and a second connecting line 302. The first switch unit 340 is connected to the first signal port 321 so that the first signal port 321 is selectively electrically connected to the first connecting line 301 and the second connecting line 302.

[0045] The first switching unit 341 is arranged symmetrically about a designated axis L. Specifically, the first switching unit 341 may include a first switching branch (not shown in the figure) and a second switching branch (not shown in the figure). The first switching branch is connected between the first connecting line 301 and the first signal port 321 to conduct or disconnect the signal branch between the first signal port 321 and the first connecting line 301. The second switching branch is connected between the second connecting line 302 and the first signal port 321 to conduct or disconnect the signal branch between the first signal port 321 and the second connecting line 302. At least one switch included in the first switching branch and at least one switch included in the second switching branch are arranged symmetrically about the designated axis L.

[0046] Therefore, when the first signal port 321 transmits radio frequency signals to the first connecting line 301 and the second connecting line 302 respectively, on the one hand, since the first signal port 321 is located on the designated axis L, the distances between the first signal port 321 and the first connecting line 301 and the second connecting line 302 are almost equal, which can improve the signal balance of the two radio frequency signals during transmission. On the other hand, since the first switching unit 341 is symmetrically arranged about the designated axis L, the impact (e.g., signal loss) on the two radio frequency signals during transmission is approximately the same, which can further improve the signal balance of the two radio frequency signals during transmission, thereby improving the signal transmission quality and transmission efficiency of the two radio frequency signals.

[0047] exist Figure 4 In the illustrated embodiment, the first switching unit 341 may include a first switch S1, a second switch S2, a third switch S3, a fourth switch S4, a fifth switch S5, and a sixth switch S6. The first switch S1 and the second switch S2 are connected in series between the first connecting line 301 and the first signal port 321. The third switch S3 and the fourth switch S4 are connected in series between the second connecting line 302 and the first signal port 321. The first switch S1 and the fourth switch S4 are symmetrically arranged about a specified axis L, and the second switch S2 and the third switch S3 are also symmetrically arranged about the specified axis L.

[0048] One end of the fifth switch S5 is connected to the common terminal of the first switch S1 and the second switch S2, and the other end of the fifth switch S5 is grounded. That is, the first switch S1, the second switch S2, and the fifth switch S5 form the first switch branch described above. One end of the sixth switch S6 is connected to the common terminal of the third switch S3 and the fourth switch S4, and the other end of the sixth switch S6 is grounded. That is, the third switch S3, the fourth switch S4, and the sixth switch S6 form the second switch branch described above. The fifth switch and the sixth switch S6 are arranged symmetrically about a designated axis L.

[0049] Specifically, the first switch S1, the second switch S2, the third switch S3, the fourth switch S4, the fifth switch S5, and the sixth switch S6 can all be metal-oxide-semiconductor field-effect transistors (MOSFETs). The first switch S1 and the fourth switch S4 have the same size, the second switch S2 and the third switch S3 have the same size, and the fifth switch S5 and the sixth switch S6 have the same size to ensure signal balance of the two radio frequency signals during transmission.

[0050] exist Figure 4In the embodiment shown, the radio frequency switch module 30 may also be provided with a first ground port 361, which is located on a designated axis L. The other end of the fifth switch S5 and the other end of the sixth switch S6 are respectively connected to the first ground port 361 to ensure the symmetry of the overall structure of the first switch unit 341.

[0051] Please see Figure 5 In some possible embodiments, the RF switch module 30 may also be provided with a second ground port 362 and a third ground port 363, which are arranged symmetrically about a designated axis L. The other end of the fifth switch S5 is connected to the second ground port 362, and the other end of the sixth switch S6 is connected to the third ground port 363 to ensure the symmetry of the overall structure of the first switch unit 341.

[0052] exist Figure 5 In the illustrated embodiment, the plurality of signal ports 320 may further include a second signal port 322, which is located on a designated axis L. The plurality of switch units 340 may further include a second switch unit 342, which is disposed between the first connecting line 301 and the second connecting line 302. The second switch unit 342 is connected to the second signal port 322 so that the second signal port 322 can be selectively electrically connected to the first connecting line 301 and the second connecting line 302. Exemplarily, a portion of the switches included in the second switch unit 342 may be connected between the second signal port 322 and the first connecting line 301 to turn on or off the signal branch between the second signal port 322 and the first connecting line 301. Another portion of the switches included in the second switch unit 342 may be connected between the second signal port 322 and the second connecting line 302 to turn on or off the signal branch between the second signal port 322 and the second connecting line 302.

[0053] The second switching unit 342 is arranged symmetrically about the designated axis L. Specifically, the second switching unit 342 can adopt the same circuit architecture as the first switching unit 341, so that when the second signal port 322 transmits radio frequency signals to the first connecting line 301 and the second connecting line 302 respectively, the signal balance of the two radio frequency signals during transmission can be improved, thereby improving the signal transmission quality and transmission efficiency of the two radio frequency signals.

[0054] exist Figure 5In the illustrated embodiment, the second switching unit 342 may include a seventh switch S7, an eighth switch S8, a ninth switch S9, a tenth switch S10, an eleventh switch S11, and a twelfth switch S12. The seventh switch S7 and the eighth switch S8 are connected in series between the first connecting line 301 and the second signal port 322. The ninth switch S9 and the tenth switch S10 are connected in series between the second connecting line 302 and the second signal port 322. The seventh switch S7 and the tenth switch S10 are symmetrically arranged about a specified axis L, and the eighth switch S8 and the ninth switch S9 are also symmetrically arranged about the specified axis L.

[0055] One end of the eleventh switch S11 is connected to the common terminal of the seventh switch S7 and the eighth switch S8, and the other end of the eleventh switch S11 is connected to the second grounding port 362. One end of the twelfth switch S12 is connected to the common terminal of the ninth switch S9 and the tenth switch S10, and the other end of the twelfth switch S12 is connected to the third grounding port 363. The eleventh switch S11 and the twelfth switch S12 are arranged symmetrically about the designated axis L.

[0056] Specifically, the seventh switch S7, the eighth switch S8, the ninth switch S9, the tenth switch S10, the eleventh switch S11, and the twelfth switch S12 can all be MOSFETs. Among them, the seventh switch S7 and the tenth switch S10 have the same size, the eighth switch S8 and the ninth switch S9 have the same size, and the eleventh switch S11 and the twelfth switch S12 have the same size to ensure the signal balance of the two RF signals during transmission.

[0057] exist Figure 5 In the illustrated embodiment, the extension direction of the designated axis L is defined as the first direction X. The eleventh switch S11, the fifth switch, the sixth switch S6, and the twelfth switch S12 are sequentially arranged in the second direction Y, which intersects with the first direction X. Specifically, the second direction Y and the first direction X can be perpendicular. This embodiment arranges the eleventh switch S11, the fifth switch, the sixth switch S6, and the twelfth switch S12 sequentially, allowing for a more compact layout of the first switch unit 341 and the second switch unit 342 on the bare die 10, saving layout space and enabling a miniaturized design of the RF switch chip 100.

[0058] Specifically, the first switch S1, the second switch S2, the third switch S3, and the fourth switch S4 are sequentially arranged in the second direction Y to form a first switch group (not shown in the figure). The eleventh switch S11, the fifth switch S5, the sixth switch S6, and the twelfth switch S12 are sequentially arranged in the second direction Y to form a second switch group (not shown in the figure). The seventh switch S7, the eighth switch S8, the ninth switch S9, and the tenth switch S10 are sequentially arranged in the second direction Y to form a third switch group (not shown in the figure). The first switch group, the second switch group, and the third switch group are sequentially arranged in the first direction X.

[0059] Therefore, in this embodiment, the twelve switches included in the first switch unit 341 and the second switch unit 342 are arranged in a 3*4 matrix on the bare core 10. While ensuring the symmetry of the first switch unit 341 and the second switch unit 342, the spatial layout of the first switch unit 341 and the second switch unit 342 is also more compact and reasonable, so as to save the layout space of the bare core 10.

[0060] Please see Figure 6 The multiple signal ports 320 may further include a third signal port 323 and a fourth signal port 324, wherein both the third signal port 323 and the fourth signal port 324 are offset from a specified axis L. Specifically, the third signal port 323 and the fourth signal port 324 are centrally symmetrical about a specified center O, and the specified center O is located on the specified axis L.

[0061] It is not difficult to understand that, since the third signal port 323 is not located on the specified axis L, the distances between the third signal port 323 and the first connecting line 301 and the second connecting line 302 are different. In other words, the signal balance of the two radio frequency signals transmitted by the first signal port 321 is higher than that of the two radio frequency signals transmitted by the third signal port 323.

[0062] Therefore, the first signal port 321 is suitable for outputting radio frequency signals with high signal balance requirements. For example, the frequency band of the radio frequency signal transmitted by the first signal port 321 can be one of B1 and B41. Furthermore, in this embodiment, the first signal port 321 is also used for transmitting... Figure 3 The MHB_TRX1_DIV port corresponds to the radio frequency signal. The third signal port 323 is suitable for outputting radio frequency signals with lower requirements for signal balance. For example, the radio frequency signal transmitted by the third signal port 323 is in one of the frequency bands B2, B7, B34 and B40.

[0063] exist Figure 6In the illustrated embodiment, the plurality of switch units 340 may further include a third switch unit 343 and a fourth switch unit 344. The third switch unit 343 is disposed between the first connecting line 301 and the second connecting line 302, and is connected to a third signal port 323 so that the third signal port 323 can be selectively electrically connected to the first connecting line 301 and the second connecting line 302. Exemplarily, a portion of the switches included in the third switch unit 343 may be connected between the third signal port 323 and the first connecting line 301 to conduct or disconnect the signal branch between the third signal port 323 and the first connecting line 301. Another portion of the switches included in the third switch unit 343 may be connected between the third signal port 323 and the second connecting line 302 to conduct or disconnect the signal branch between the third signal port 323 and the second connecting line 302.

[0064] A fourth switch unit 344 is disposed between the first connecting line 301 and the second connecting line 302. The fourth switch unit 344 is connected to the fourth signal port 324 so that the fourth signal port 324 can be selectively electrically connected to the first connecting line 301 and the second connecting line 302. Exemplarily, a portion of the switches included in the fourth switch unit 344 can be connected between the fourth signal port 324 and the first connecting line 301 to turn on or off the signal branch between the fourth signal port 324 and the first connecting line 301. Another portion of the switches included in the fourth switch unit 344 can be connected between the fourth signal port 324 and the second connecting line 302 to turn on or off the signal branch between the fourth signal port 324 and the second connecting line 302.

[0065] Specifically, the third switching unit 343 and the fourth switching unit 344 are centrally symmetrical about the designated center O. Therefore, when the first signal port 321 transmits two radio frequency signals, the effects of the third switching unit 343 and the fourth switching unit 344 on the two radio frequency signals (e.g., coupling impedance) are approximately equal, so as to ensure the balance of the two radio frequency signals corresponding to the first signal port 321.

[0066] Specifically, the RF switch module 30 may also be provided with a fourth ground port 364, which is located at a designated center O. The third switch unit 343 may include a thirteenth switch S13, a fourteenth switch S14, and a fifteenth switch S15. The thirteenth switch S13 is connected between the first connection line 301 and the third signal port 323; the fourteenth switch S14 is connected between the second connection line 302 and the third signal port 323; and the fifteenth switch S15 is connected between the third signal port 323 and the fourth ground port 364.

[0067] The fourth switching unit 344 may include a sixteenth switch S16, a seventeenth switch S17, and an eighteenth switch S18. The sixteenth switch S16 is connected between the first connection line 301 and the fourth signal port 324, and the sixteenth switch S16 and the fourteenth switch S14 are centrally symmetrical about the fourth ground port 364. The seventeenth switch S17 is connected between the second connection line 302 and the fourth signal port 324, and the seventeenth switch S17 and the thirteenth switch S13 are centrally symmetrical about the fourth ground port 364. The eighteenth switch S18 is connected between the fourth signal port 324 and the fourth ground port 364, and the eighteenth switch S18 and the fifteenth switch S15 are centrally symmetrical about the fourth ground port 364.

[0068] Specifically, the thirteenth switch S13, the fourteenth switch S14, the fifteenth switch S15, the sixteenth switch S16, the seventeenth switch S17, and the eighteenth switch S18 can all be MOSFETs. Among them, the thirteenth switch S13 and the seventeenth switch S17 have the same size, the fourteenth switch S14 and the sixteenth switch S16 have the same size, and the fifteenth switch S15 and the eighteenth switch S18 have the same size.

[0069] Therefore, by aligning the third switch unit 343 and the fourth switch unit 344 centrally symmetrically about the designated center O, the overall structure of the third switch unit 343 and the fourth switch unit 344 can be made more compact. Furthermore, by offsetting the third signal port 323 and the fourth signal port 324 from the designated axis L, the layout space of the third signal port 323, the fourth ground port 364, and the fourth signal port 324 can be further reduced while meeting the bump spacing requirements. Here, the "bump" can be a copper pillar or a solder ball.

[0070] Furthermore, the third signal port 323 and the fourth signal port 324 are arranged diagonally, and the fourth ground port 364 is located between the third signal port 323 and the fourth signal port 324. On the one hand, this ensures the uniformity of stress; on the other hand, the fourth ground port 364 can optimize the isolation of the radio frequency signals transmitted by the third signal port 323 and the fourth signal port 324 at the spatial level, thereby improving the transmission efficiency of the radio frequency signals.

[0071] Please see Figure 7 In some possible embodiments, the first signal port 321 is used to transmit radio frequency signals in the B41 band, and the third signal port 323 is used to transmit radio frequency signals in the B40 band. The plurality of signal ports 30 may also include a fifth signal port 325, which is located on a designated axis L. Here, the fifth signal port 325 may be... Figure 3The HB_TRX_AUX1 port.

[0072] exist Figure 5 In the illustrated embodiment, the RF switch chip 100 may further include a fifth switch unit 345, which is disposed between the first connecting line 301 and the second connecting line 302. The fifth switch unit 345 is connected to a fifth signal port 325, so that the fifth signal port 325 can be selectively electrically connected to the first signal port 321 and the third signal port 323. Specifically, the fifth switch unit 345 is arranged symmetrically about a designated axis L.

[0073] exist Figure 5 In the illustrated embodiment, the fifth switching unit 345 may include a nineteenth switch S19 and a twentieth switch S20. The nineteenth switch S19 is connected between the fifth signal port 325 and the first signal port 321, and the twentieth switch S20 is connected between the fifth signal port 325 and the third signal port 323. The nineteenth switch S19 and the twentieth switch S20 are axially symmetrical about a specified axis L. Specifically, both the nineteenth switch S19 and the twentieth switch S20 may be MOSFETs, and the nineteenth switch S19 and the twentieth switch S20 have the same dimensions.

[0074] Therefore, when the first signal port 321 transmits two radio frequency signals, the impact of the fifth switching unit 345 on the two radio frequency signals (e.g., coupling impedance) is approximately equal, ensuring the balance of the two radio frequency signals corresponding to the first signal port 321. Furthermore, in this embodiment, the fifth switching unit 345 is positioned between the first switching unit 341 and the third switching unit 343, allowing for a more compact and rational spatial arrangement of the multiple switching units 340.

[0075] Please refer to the following documents separately. Figure 3 and Figure 8 ,exist Figure 8 In the illustrated embodiment, there are two first signal ports 321. These two first signal ports 321 may include a first sub-signal port 3212 and a second sub-signal port 3214, wherein the first sub-signal port 3212 corresponds to... Figure 3 Port B1 in the diagram, the second sub-signal port 3214 corresponds to Figure 3 Port B41 in the diagram. There is one second signal port 322, which corresponds to... Figure 3 The MHB_TRX1_DIV port, Figure 3 The second signal port 322 and the second sub-signal port 3214 in the system share two grounding ports.

[0076] exist Figure 8In the illustrated embodiment, there are two third signal ports 323 and two fourth signal ports 324. The two third signal ports 323 may include a third sub-signal port 3232 and a fourth sub-signal port 3234, and the two fourth signal ports 324 may include a fifth sub-signal port 3242 and a sixth sub-signal port 3244. The third sub-signal port 3232 and the fifth sub-signal port 3242 are centrally symmetrical about the first designated center O1. The third sub-signal port 3232 corresponds to... Figure 3 Port B34, the fifth sub-signal port 3242 corresponds to Figure 3 Port B7 in the diagram. The fourth sub-signal port 3234 and the sixth sub-signal port 3244 are centrally symmetrical about the second designated center O2. The fourth sub-signal port 3234 corresponds to... Figure 3 Port B40, the sixth sub-signal port 3244 corresponds to Figure 3 Port B2 in the diagram. There is one fifth signal port 325, which corresponds to... Figure 3 The HB_TRX_AUX1 port.

[0077] It should be noted that the above-mentioned configuration of signal ports 320 is only illustrative. Researchers can adjust the number of signal ports 320 and the specific signal frequency band corresponding to each signal port 320 according to the actual functional requirements of the RF switch chip 100. This embodiment does not impose any specific limitations.

[0078] In this embodiment, the RF switch chip 100 may further include a first coupling module 40 and a second coupling module 42. The first coupling module 40 is disposed on the bare die 10 and coupled to the first connection line 301; the first coupling module 40 is used to output a first detection signal, which reflects the signal power of the RF signal output to the first antenna port 306. Specifically, the first detection signal can be a voltage signal or a current signal. The second coupling module 42 is disposed on the bare die 10 and coupled to the second connection line 302; the second coupling module 42 is used to output a second detection signal, which reflects the signal power of the RF signal output to the second antenna port 307. Specifically, the second detection signal can be a voltage signal or a current signal.

[0079] Since different coupling modules can detect the signal power of the RF signal output to the corresponding antenna port, the RF front-end module 200, which is subsequently equipped with the RF switch chip 100, can dynamically adjust the RF signal with excessive power to ensure normal transmission of the RF signal. In addition, the RF switch module 30, the first coupling module 40, and the second coupling module 42 are all mounted on the bare die 10, making the overall hardware layout of the RF switch chip 100 more compact and reasonable, so as to realize the miniaturization design of the RF switch chip 100.

[0080] Specifically, the first coupling module 40 and the second coupling module 42 can adopt the same circuit architecture, and the first coupling module 40 and the second coupling module 42 are arranged symmetrically about the specified axis L. Therefore, when the first signal port 321 transmits two radio frequency signals, the influence (e.g., coupling impedance) of the first coupling module 40 and the second coupling module 42 on the two radio frequency signals is approximately equal, so as to ensure the balance of the two radio frequency signals corresponding to the first signal port 321. This embodiment does not limit the specific implementation of the first coupling module 40 and the second coupling module 42.

[0081] exist Figure 8 In the embodiment shown, the first coupling module 40 can be set in the region between the designated axis L and the first connecting line 301, so that the distance between the first coupling module 40 and the first connecting line 301 is less than the distance between the first coupling module 40 and the second connecting line 302, thereby reducing the signal traces required by the first coupling module 40 and improving the coupling degree between the first coupling module 40 and the first connecting line 301.

[0082] The second coupling module 42 can be set in the region between the specified axis L and the second connecting line 302, so that the distance between the second coupling module 42 and the second connecting line 302 is less than the distance between the second coupling module 42 and the first connecting line 301, thereby reducing the signal traces required by the second coupling module 42 and improving the coupling degree between the second coupling module 42 and the second connecting line 302.

[0083] In this embodiment, the bare die 10 may further be provided with a first detection port 105 and a second detection port 107, wherein the first detection port 105 is used to output a first detection signal, and the second detection port 107 is used to output a second detection signal. Specifically, the first detection port 105 may correspond to... Figure 3 The CPL_IN_OUT1 port and the second detection port 107 in the data can correspond to... Figure 3 The CPL_IN_OUT2 port in the system.

[0084] Specifically, the RF switch chip 100 may further include a switching module 44, which is disposed on the bare die 10 and located on a designated axis L. The switching module 44 is connected between the first coupling module 40 and the first detection port 105, allowing the first coupling module 40 to be selectively electrically connected to the first detection port 105. The switching module 44 is also connected between the second coupling module 42 and the second detection port 107, allowing the second coupling module 42 to be selectively electrically connected to the second detection port 107. Therefore, by setting the switching module 44, this embodiment can selectively output the first detection signal and the second detection signal to an external circuit, making the output of the detection signal more flexible.

[0085] In this embodiment, the switching module 44 can be located between the first coupling module 40 and the second coupling module 42. For example, the first coupling module 40, the switching module 44, and the second coupling module 42 can be arranged sequentially in the second direction Y to reduce the signal traces between the first coupling module 40 and the switching module 44, as well as between the second coupling module 42 and the switching module 44, making the overall structure of the RF switch chip 100 more compact. Specifically, the switching module 44 can include multiple switching switches, and this embodiment does not specifically limit the specific implementation of the multiple switching switches.

[0086] In some possible embodiments, the switching module 44 is connected to the first ground port 361. For example, some of the switching switches included in the switching module 44 are connected to the first ground port 361. Furthermore, the first switching unit 341 is also connected to the first ground port 361. That is, the first switching unit 341 and the switching module 44 share the first ground port 361 to accommodate the grounding requirements of the switching module 44, and also to make the layout between the switching module 44 and the RF switch module 30 more compact and reasonable.

[0087] Specifically, the first detection port 105 can be located on a designated axis L, and the first ground port 361 can be located between the first signal port 320 and the first detection port 105. Therefore, the first ground port 361 spatially separates the first signal port 320 and the first detection port 105, which can prevent the first detection signal output by the first detection port 105 from interfering with the radio frequency signal at the first signal port 320, thereby ensuring the normal operation of the radio frequency switch chip 100.

[0088] Similarly, the second detection port 107 can be located on a designated axis L, and the first ground port 361 can be located between the first signal port 320 and the second detection port 107. Therefore, the first ground port 361 spatially separates the first signal port 320 and the second detection port 107, which can prevent the second detection signal output by the second detection port 107 from interfering with the radio frequency signal at the first signal port 320, thus ensuring the normal operation of the radio frequency switch chip 100.

[0089] The first embodiment of this application provides a radio frequency (RF) switch chip 100 and an RF front-end module 200 configured with the RF switch chip 100. The RF switch chip 100 may include a bare die 10 and an RF switch module 30, which is disposed on the bare die 10. The RF switch module 30 has a first connecting line 301, a second connecting line 302, and a plurality of signal ports 320. The first connecting line 301 and the second connecting line 302 are symmetrically arranged about a designated axis L. The first connecting line 301 is used to connect to a first antenna port 306, and the second connecting line 302 is used to connect to a second antenna port 307. At least a portion of the plurality of signal ports 320 are located on the designated axis L. Because the first connecting line 301 and the second connecting line 302 are symmetrically arranged about the designated axis L, the distances between the signal ports 320 located on the designated axis L and the first connecting line 301 and the second connecting line 302 are approximately equal.

[0090] The radio frequency switch module 30 may include a plurality of switch units 340, which are respectively connected between a first connection line 301 and a plurality of signal ports 320, so that the first connection line 301 can be electrically connected to the plurality of signal ports 320; the plurality of switch units 340 are also respectively connected between a second connection line 302 and a plurality of signal ports 320, so that the second connection line 302 can be electrically connected to the plurality of signal ports 320.

[0091] Therefore, when the switching unit 340 corresponding to the signal port 320 located on the designated axis L turns on the signal branch between the signal port 320 and the first connecting line 301 and the signal branch between the signal port 320 and the second connecting line 302 respectively, the lengths of the two signal branches are approximately equal. This improves the signal balance of the two RF signals during transmission, ensuring that the performance indicators of the two RF signals are closer during transmission. This, in turn, improves the signal transmission quality and efficiency of the two RF signals, giving the RF switch chip 100 better working performance.

[0092] Please see Figure 9The second embodiment of this application provides a radio frequency (RF) switch chip 500, which may include a bare die 50, an RF switch module 60, a first coupling module 70, and a second coupling module 72. The RF switch module 60 is disposed on the bare die 50. The RF switch module 60 is provided with a first connecting line 601, a second connecting line 602, and a signal port 620. The first connecting line 601 is used to connect to a first antenna port 606, and the second connecting line 602 is used to connect to a second antenna port 607.

[0093] The "first antenna port 606" and "second antenna port 607" here are respectively adapted to connect different antennas to realize the reception and / or transmission of at least two radio frequency signals. For example, when the radio frequency switch chip 500 is integrated in the radio frequency front-end module 200, the "first antenna port 606" and "second antenna port 607" can respectively correspond to the two antennas connected to the radio frequency front-end module 200.

[0094] Specifically, the RF switch module 60 may include a switch unit 640, which is disposed between the first connecting line 601 and the second connecting line 602. The switch unit 640 is connected to the signal port 620 so that the signal port 620 can be selectively electrically connected to the first connecting line 601 and the second connecting line 602. Exemplarily, the switch unit 640 may include a first designated switch branch (not shown in the figure) and a second designated switch branch (not shown in the figure). The first designated switch branch is connected between the first connecting line 601 and the signal port 620 to conduct or disconnect the signal branch between the signal port 620 and the first connecting line 601. The second designated switch branch is connected between the second connecting line 602 and the signal port 620 to conduct or disconnect the signal branch between the signal port 620 and the second connecting line 602. Since the signal port in this embodiment can be selectively electrically connected to the first connecting line 601 and the second connecting line 602 through the switch unit 640, the signal port can receive and / or transmit RF signals at different antenna ports.

[0095] In this embodiment, a first coupling module 70 is disposed on the bare core 50 and coupled to a first connecting line 601. The first coupling module 70 outputs a first detection signal, which reflects the signal power of the radio frequency signal output to the first antenna port 606. Specifically, the first detection signal can be a voltage signal or a current signal. A second coupling module 72 is disposed on the bare core 50 and coupled to a second connecting line 602. The second coupling module 72 outputs a second detection signal, which reflects the signal power of the radio frequency signal output to the second antenna port 607. Specifically, the second detection signal can be a voltage signal or a current signal.

[0096] Different coupling modules can detect the signal power of the RF signal output to the corresponding antenna port, enabling the RF front-end module 200, which is subsequently equipped with the RF switch chip 500, to dynamically adjust excessively powerful RF signals to ensure normal RF signal transmission. Furthermore, the RF switch module 60, the first coupling module 70, and the second coupling module 72 are all mounted on the bare die 50, and the second coupling module 72 and the first coupling module 70 are located on the same side of the RF switch module 60, making the overall hardware layout of the RF switch chip 500 more compact and reasonable, thus achieving a miniaturized design of the RF switch chip 500.

[0097] The specific implementation of the RF switch chip 500 will be explained in detail below.

[0098] In this embodiment, the features of bare core 50, first connecting line 601, second connecting line 602, first antenna port 606, second antenna port 607, signal port 620, and switching unit 640 can respectively refer to and adopt the features of bare core 10, first connecting line 301, second connecting line 302, first antenna port 306, second antenna port 307, signal port 320, and switching unit 340 in the first embodiment. For the sake of brevity, they will not be described in detail here. Similarly, unless there is a conflict, bare core 10, first connecting line 301, second connecting line 302, first antenna port 306, second antenna port 307, signal port 320, and switching unit 340 in the first embodiment can also respectively possess the features of bare core 50, first connecting line 601, second connecting line 602, first antenna port 606, second antenna port 607, signal port 620, and switching unit 640 in the second embodiment. The features of the two embodiments can be combined with each other.

[0099] In this embodiment, the bare chip 50 may also be provided with a first detection port 505 and a second detection port 507, wherein the first detection port 505 is used to output a first detection signal, and the second detection port 507 is used to output a second detection signal. Specifically, the features of the first detection port 505 and the second detection port 507 can refer to and adopt the features of the first detection port 105 and the second detection port 107 in the first embodiment, respectively. For the sake of brevity, they will not be described in detail here. Similarly, unless there is a conflict, the first detection port 105 and the second detection port 107 in the first embodiment can also have the features of the first detection port 505 and the second detection port 507 in the second embodiment, respectively. The features of the two embodiments can be combined with each other.

[0100] In some possible embodiments, the RF switch chip 500 may further include a switching module 74 disposed on the bare die 50. The switching module 74 is connected between the first coupling module 70 and the first detection port 505, allowing the first coupling module 70 to be selectively electrically connected to the first detection port 505. The switching module 74 is also connected between the second coupling module 72 and the second detection port 507, allowing the second coupling module 72 to be selectively electrically connected to the second detection port 507. Therefore, by providing the switching module 74, this embodiment can selectively output the first detection signal and the second detection signal to an external circuit, making the output of the detection signal more flexible.

[0101] In this embodiment, the switching module 74 can be located between the first coupling module 70 and the second coupling module 72 to reduce the signal traces between the first coupling module 70 and the switching module 74, as well as between the second coupling module 72 and the switching module 74, so that the overall structure of the RF switch chip 100 can be more compact.

[0102] exist Figure 9 In the illustrated embodiment, the bare core 50 may have a first layout region 51 and a second layout region 52, both of which are located between the first connecting line 601 and the second connecting line 602. The first layout region 51 and the second layout region 52 may be two spatial regions on the bare core 50, which may be adjacent to each other or spaced apart.

[0103] Specifically, signal port 620 and switching unit 640 are disposed in the first layout area 51. First coupling module 70, second coupling module 72, and switching module 74 are disposed in the second layout area 52. On one hand, this allows for a more compact and rational hardware layout of the entire RF switch chip 500; on the other hand, it reduces signal interference between the RF signal transmitted through signal port 620 and the detection signal transmitted through detection port, thereby ensuring the normal operation of the RF switch chip 500.

[0104] In one implementation, the first layout area 51 and the second layout area 52 are sequentially arranged in the first direction X. Here, "first direction X" can be the extension direction of the first connecting line 601 or the second connecting line 602, or it can be the extension direction of the specified axis L in the first embodiment. The first coupling module 70, the switching module 74, and the second coupling module 72 are sequentially arranged side-by-side in the second direction Y, where the second direction Y intersects the first direction X. Specifically, the second direction Y can be perpendicular to the first direction X. The first coupling module 70 is located on the side of the switching module 74 facing the first connecting line 601, so that the first coupling module 70 is positioned close to the first connecting line 601, which can reduce the signal traces required for the first coupling module 70. The second coupling module 72 is located on the side of the switching module 74 facing the second connecting line 602, so that the second coupling module 72 is positioned close to the second connecting line 602, which can reduce the signal traces required for the second coupling module 72.

[0105] Specifically, other features of the first coupling module 70, the second coupling module 72, and the switching module 74 can be referenced and adopted from the features of the first coupling module 40, the second coupling module 42, and the switching module 44 in the first embodiment, respectively. For the sake of brevity, they will not be described in detail here. Similarly, unless there is a conflict, the first coupling module 40, the second coupling module 42, and the switching module 44 in the first embodiment can also have the features of the first coupling module 70, the second coupling module 72, and the switching module 74 in the second embodiment, respectively. The features of the two embodiments can be combined with each other.

[0106] In some possible embodiments, the bare die 50 may also have a third layout region 53, which is located on the side of the first layout region 51 away from the second layout region 52. Specifically, the third layout region 53, the first layout region 51, and the second layout region 52 are arranged sequentially in the first direction X. The RF switch chip 500 may include a control module 80, which is disposed in the third layout region 53 and electrically connected to the RF switch module 60. The control module 80 is used to control the operation of the RF switch module 60. For example, the RF switch module 60 may include multiple switches (e.g., MOSFETs), and the control module 80 may be used to send control signals to the multiple switches to turn them on or off.

[0107] Specifically, the bare core 50 may also be provided with a grounding wire 501, which may be a section of metal trace on the bare core 50, suitable for connecting to an external "ground". At least some of the switches included in the RF switch module 60 are connected to the grounding wire 501. For example, if the switch unit 640 adopts the circuit architecture of the first switch unit 341 in the first embodiment, the fifth switch S5 and the sixth switch S6 in the first switch unit 341 may be connected to the grounding wire 501.

[0108] exist Figure 9 In the embodiment shown, the grounding wire 501 is located between the first layout area 51 and the third layout area 53, so that the grounding wire 501 spatially separates the RF switch module 60 and the control module 80. It can be equivalent to a "Faraday cage", which can prevent the RF signal at the RF switch module 60 from interfering with the control module 80, so as to ensure the normal operation of the RF switch chip 500.

[0109] In some possible embodiments, the control module 80 may further include a designated functional unit 810 for generating an oscillation frequency. For example, the designated functional unit 810 may include an oscillator (OSC) and a charge pump, which can be used to provide a stable control voltage to multiple switches to ensure that the switches in the RF switch module 60 are smoothly turned on or off.

[0110] Specifically, the designated functional unit 810 is located on the side of the control module 80 away from the RF switch module 60. Since the oscillator and charge pump operate at a certain oscillation frequency, higher harmonics of this oscillation frequency may spatially interfere with the signal port 620 in the RF switch module 60. Therefore, placing the designated functional unit 810 on the control module 80 away from the RF switch module 60 reduces the impact of the oscillation frequency of the designated functional unit 810 on the RF signal, thus ensuring the efficiency of RF signal transmission.

[0111] The second embodiment of this application provides a radio frequency (RF) switch chip 500 and an RF front-end module 200 configured with the RF switch chip 500. The RF switch chip 500 may include a bare die 50, an RF switch module 60, a first coupling module 70, and a second coupling module 72. The RF switch module 60 is disposed on the bare die 50. The RF switch module 60 has a first connection line 601, a second connection line 602, and a signal port 620. The first connection line 601 is used to connect to a first antenna port 606, and the second connection line 602 is used to connect to a second antenna port 607.

[0112] In this embodiment, a first coupling module 70 is disposed on the bare core 50 and coupled to a first connecting line 601. The first coupling module 70 outputs a first detection signal, which reflects the signal power of the radio frequency signal output to the first antenna port 606. A second coupling module 72 is disposed on the bare core 50 and coupled to a second connecting line 602. The second coupling module 72 outputs a second detection signal, which reflects the signal power of the radio frequency signal output to the second antenna port 607.

[0113] Different coupling modules can detect the signal power of the RF signal output to the corresponding antenna port, enabling the RF front-end module 200, which is subsequently equipped with the RF switch chip 500, to dynamically adjust excessively powerful RF signals to ensure normal RF signal transmission. Furthermore, the RF switch module 60, the first coupling module 70, and the second coupling module 72 are all mounted on the bare die 50, and the second coupling module 72 and the first coupling module 70 are located on the same side of the RF switch module 60, making the overall hardware layout of the RF switch chip 500 more compact and reasonable, thus achieving a miniaturized design of the RF switch chip 500.

[0114] In this application specification, certain terms are used to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. The specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to"; "generally" means that those skilled in the art can solve the technical problem within a certain margin of error and basically achieve the technical effect.

[0115] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inside", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description of this application and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0116] In this application, unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or merely surface contact. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0117] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0118] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A radio frequency switch chip, characterized in that, include: bare die; as well as A radio frequency (RF) switch module is disposed on the bare core; the RF switch module has a first connecting line, a second connecting line, and multiple signal ports, the first connecting line and the second connecting line are arranged symmetrically about a designated axis, wherein the first connecting line is used to connect to a first antenna port, and the second connecting line is used to connect to a second antenna port; at least a portion of the multiple signal ports are located on the designated axis; The radio frequency switch module further includes multiple switch units, which are respectively connected between the first connecting line and the multiple signal ports, so that the first connecting line can be electrically connected to the multiple signal ports; the multiple switch units are also respectively connected between the second connecting line and the multiple signal ports, so that the second connecting line can be electrically connected to the multiple signal ports; wherein, the multiple switch units are disposed between the first connecting line and the second connecting line.

2. The radio frequency switch chip according to claim 1, characterized in that, The plurality of signal ports include a first signal port, which is located on the designated axis; The plurality of switching units include a first switching unit disposed between the first connecting line and the second connecting line; the first switching unit is connected to the first signal port so that the first signal port can be selectively electrically connected to the first connecting line and the second connecting line; The first switching unit is arranged symmetrically about the designated axis.

3. The radio frequency switch chip according to claim 2, characterized in that, The first switching unit includes a first switch, a second switch, a third switch, a fourth switch, a fifth switch, and a sixth switch; The first switch and the second switch are connected in series between the first connecting line and the first signal port; the third switch and the fourth switch are connected in series between the second connecting line and the first signal port; the first switch and the fourth switch are symmetrically arranged about the designated axis, and the second switch and the third switch are symmetrically arranged about the designated axis. One end of the fifth switch is connected to the common terminal of the first switch and the second switch, and the other end of the fifth switch is grounded; one end of the sixth switch is connected to the common terminal of the third switch and the fourth switch, and the other end of the sixth switch is grounded; the fifth switch and the sixth switch are arranged symmetrically about the designated axis.

4. The radio frequency switch chip according to claim 3, characterized in that, The radio frequency switch module is also provided with a first grounding port; the first grounding port is located on the designated axis. The other end of the fifth switch and the other end of the sixth switch are respectively connected to the first grounding port.

5. The radio frequency switch chip according to claim 3, characterized in that, The radio frequency switch module is also provided with a second ground port and a third ground port, which are arranged symmetrically about the designated axis. The other end of the fifth switch is connected to the second grounding port, and the other end of the sixth switch is connected to the third grounding port.

6. The radio frequency switch chip according to claim 5, characterized in that, The plurality of signal ports further include a second signal port, the second signal port being located on the designated axis; The plurality of switching units further includes a second switching unit disposed between the first connecting line and the second connecting line; the second switching unit is connected to the second signal port so that the second signal port can be selectively electrically connected to the first connecting line and the second connecting line; The second switching unit is arranged symmetrically about the designated axis.

7. The radio frequency switch chip according to claim 6, characterized in that, The second switching unit includes a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch, and a twelfth switch; The seventh switch and the eighth switch are connected in series between the first connecting line and the second signal port; the ninth switch and the tenth switch are connected in series between the second connecting line and the second signal port; the seventh switch and the tenth switch are symmetrical about the designated axis, and the eighth switch and the ninth switch are symmetrical about the designated axis. One end of the eleventh switch is connected to the common terminal of the seventh and eighth switches, and the other end of the eleventh switch is connected to the second grounding port; one end of the twelfth switch is connected to the common terminal of the ninth and tenth switches, and the other end of the twelfth switch is connected to the third grounding port; the eleventh and twelfth switches are arranged symmetrically about the designated axis.

8. The radio frequency switch chip according to claim 7, characterized in that, The extension direction of the specified axis is the first direction; The eleventh switch, the fifth switch, the sixth switch, and the twelfth switch are arranged sequentially in the second direction, which intersects with the first direction.

9. The radio frequency switch chip according to claim 8, characterized in that, The first switch, the second switch, the third switch, and the fourth switch are arranged sequentially in the second direction to form a first switch group; The eleventh switch, the fifth switch, the sixth switch, and the twelfth switch are arranged sequentially in the second direction to form a second switch group; The seventh switch, the eighth switch, the ninth switch, and the tenth switch are arranged sequentially in the second direction to form a third switch group; The first switch group, the second switch group, and the third switch group are arranged sequentially in the first direction.

10. The radio frequency switch chip according to claim 8, characterized in that, The bare core has a first side and a second side opposite to each other; the first direction is the extending direction of the first side and the second side; The bare core also has a third side and a fourth side, wherein the first side, the third side, the second side and the fourth side are connected in sequence to define the outer contour of the bare core; the second direction is the extension direction of the third side and the fourth side.

11. The radio frequency switch chip according to claim 1, characterized in that, The plurality of signal ports further include a third signal port and a fourth signal port, both of which are offset from the designated axis; The third signal port and the fourth signal port are centrally symmetrical about a designated center, which is located on the designated axis.

12. The radio frequency switch chip according to claim 11, characterized in that, The plurality of switching units further include a third switching unit and a fourth switching unit; The third switch unit is disposed between the first connecting line and the second connecting line, and the third switch unit is connected to the third signal port so that the third signal port can be selectively electrically connected to the first connecting line and the second connecting line; The fourth switch unit is disposed between the first connecting line and the second connecting line, and the fourth switch unit is connected to the fourth signal port so that the fourth signal port can be selectively electrically connected to the first connecting line and the second connecting line; The third switch unit and the fourth switch unit are centrally symmetrical about the designated center.

13. The radio frequency switch chip according to claim 12, characterized in that, The radio frequency switch module is also provided with a fourth grounding port, which is located at the designated center. The third switching unit includes a thirteenth switch, a fourteenth switch, and a fifteenth switch; the thirteenth switch is connected between the first connecting line and the third signal port; the fourteenth switch is connected between the second connecting line and the third signal port; and the fifteenth switch is connected between the third signal port and the fourth ground port. The fourth switch unit includes the sixteenth switch, the seventeenth switch, and the eighteenth switch; The sixteenth switch is connected between the first connection line and the fourth signal port, and the sixteenth switch and the fourteenth switch are centrally symmetrical about the fourth ground port; The seventeenth switch is connected between the second connection line and the fourth signal port, and the seventeenth switch and the thirteenth switch are centrally symmetrical about the fourth ground port; The eighteenth switch is connected between the fourth signal port and the fourth ground port, and the eighteenth switch and the fifteenth switch are centrally symmetrical about the fourth ground port.

14. The radio frequency switch chip according to claim 1, characterized in that, The plurality of signal ports include a first signal port and a third signal port; The first signal port is located on the designated axis, and the third signal port is offset from the designated axis so that the signal balance of the two radio frequency signals transmitted by the first signal port is higher than that of the two radio frequency signals transmitted by the third signal port.

15. The radio frequency switch chip according to claim 14, characterized in that, The first signal port is used to transmit radio frequency signals in one of the frequency bands B1 and B41; or / and The frequency band for transmitting radio frequency signals at the third signal port is one of B2, B7, B34, and B40.

16. The radio frequency switch chip according to claim 14, characterized in that, The first signal port is used to transmit radio frequency signals in the B41 band, and the third signal port is used to transmit radio frequency signals in the B40 band. The plurality of signal ports include a fifth signal port, which is located on the designated axis; the radio frequency switch chip further includes a fifth switch unit disposed between the first connection line and the second connection line; the fifth switch unit is connected to the fifth signal port so that the fifth signal port can be selectively electrically connected to the first signal port and the third signal port; The fifth switch unit is arranged symmetrically about the designated axis.

17. The radio frequency switch chip according to claim 16, characterized in that, The fifth switching unit includes a nineteenth switch and a twentieth switch. The nineteenth switch is connected between the fifth signal port and the first signal port, and the twentieth switch is connected between the fifth signal port and the third signal port. The nineteenth switch and the twentieth switch are axially symmetrical about the designated axis.

18. The radio frequency switch chip according to claim 1, characterized in that, The radio frequency switch chip further includes a first coupling module and a second coupling module, wherein the first coupling module and the second coupling module are arranged symmetrically about the designated axis. The first coupling module is disposed on the bare core and coupled to the first connecting line; the first coupling module is used to output a first detection signal, which is used to reflect the signal power of the radio frequency signal output to the first antenna port; The second coupling module is disposed on the bare core and coupled to the second connecting line; the second coupling module is used to output a second detection signal, which reflects the signal power of the radio frequency signal output to the second antenna port.

19. The radio frequency switch chip according to claim 18, characterized in that, The distance between the first coupling module and the first connecting line is less than the distance between the first coupling module and the second connecting line; The distance between the second coupling module and the second connecting line is less than the distance between the second coupling module and the first connecting line.

20. The radio frequency switch chip according to claim 18, characterized in that, The bare die is further provided with a first detection port and a second detection port; the RF switch chip also includes a switching module, which is disposed on the bare die and located on the designated axis; The switching module is connected between the first coupling module and the first detection port, so that the first coupling module can be selectively electrically connected to the first detection port; the switching module is also connected between the second coupling module and the second detection port, so that the second coupling module can be selectively electrically connected to the second detection port.

21. The radio frequency switch chip according to claim 20, characterized in that, The switching module is located between the first coupling module and the second coupling module.

22. The radio frequency switch chip according to claim 20, characterized in that, The radio frequency switch module is further provided with a first ground port, which is located on the designated axis; the switching module is connected to the first ground port; The plurality of signal ports include a first signal port located on the designated axis; the plurality of switching units include a first switching unit connected to the first grounding port; The first switch unit is disposed between the first connecting line and the second connecting line; the first switch unit is connected to the first signal port so that the first signal port can be selectively electrically connected to the first connecting line and the second connecting line.

23. The radio frequency switch chip according to claim 22, characterized in that, The first grounding port is located between the first signal port and the first detection port; and / or The first grounding port is located between the first signal port and the second detection port.

24. The radio frequency switch chip according to any one of claims 1 to 23, characterized in that, The bare core has a first side and a second side opposite to each other; The first side and the second side are axially symmetric about the designated axis.

25. A radio frequency switch chip, characterized in that, include: bare die; An RF switch module is disposed on the bare core; the RF switch module is provided with a first connecting line, a second connecting line, and a signal port; the first connecting line is used to connect to a first antenna port, and the second connecting line is used to connect to a second antenna port; the RF switch module includes a switch unit disposed between the first connecting line and the second connecting line; the switch unit is connected to the signal port so that the signal port can be selectively electrically connected to the first connecting line and the second connecting line; The first coupling module is disposed on the bare core; The first coupling module is coupled to the first connecting line and is used to output a first detection signal. The first detection signal is used to reflect the signal power of the radio frequency signal output to the first antenna port. as well as The second coupling module is disposed on the bare core; The second coupling module is coupled to the second connecting line and is used to output a second detection signal. The second detection signal is used to reflect the signal power of the radio frequency signal output to the second antenna port. The second coupling module and the first coupling module are both located on the same side of the radio frequency switch module.

26. The radio frequency switch chip according to claim 25, characterized in that, The bare die is also provided with a first detection port and a second detection port; the RF switch chip also includes a switching module, which is disposed on the bare die. The switching module is connected between the first coupling module and the first detection port, so that the first coupling module can be selectively electrically connected to the first detection port; the switching module is also connected between the second coupling module and the second detection port, so that the second coupling module can be selectively electrically connected to the second detection port. The switching module is located between the first coupling module and the second coupling module.

27. The radio frequency switch chip according to claim 26, characterized in that, The bare core is provided with a first layout area and a second layout area, both of which are located between the first connecting line and the second connecting line. The signal port and the switch unit are disposed in the first layout area; the first coupling module, the second coupling module and the switching module are disposed in the second layout area.

28. The radio frequency switch chip according to claim 27, characterized in that, The first layout area and the second layout area are arranged sequentially in the first direction; The first coupling module, the switching module, and the second coupling module are arranged side by side in a second direction, and the second direction intersects with the first direction.

29. The radio frequency switch chip according to claim 28, characterized in that, The bare core also has a third layout area, which is located on the side of the first layout area away from the second layout area; The radio frequency switch chip also includes a control module, which is disposed in the third layout area and electrically connected to the radio frequency switch module for controlling the radio frequency switch module to operate.

30. The radio frequency switch chip according to claim 29, characterized in that, The bare core is also provided with a grounding wire; at least some of the switches included in the radio frequency switch module are connected to the grounding wire; The grounding wire is located between the first layout area and the third layout area.

31. The radio frequency switch chip according to claim 29, characterized in that, The control module further includes a designated functional unit, which is used to generate an oscillation frequency; The designated functional unit is located on the side of the control module away from the radio frequency switch module.

32. A radio frequency front-end module, characterized in that, include: substrate; as well as The radio frequency switch chip according to any one of claims 1 to 31, wherein the radio frequency switch chip is disposed on the substrate.

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