Radio frequency module and electronic equipment

Abstract

The utility model discloses a radio frequency module and electronic equipment, and relates to the technical field of radio frequency, and the radio frequency module comprises a power amplification circuit which comprises at least one power amplifier; the filter circuit comprises at least one filter, and the output end of the filter is connected with the antenna port; the phase shift circuit is located between the power amplification circuit and the filter circuit and comprises at least one phase shifter; wherein the input end of the phase shifter is connected with the output end of the power amplifier, the output end of the phase shifter is connected with the input end of the filter, and the phase shifter is used for adjusting the phase of an output signal of the power amplifier. The wave crest position of the waveform of the output power of the power amplifier and the wave crest position of the waveform of the fusing power of the filter meet the same condition, so that the probability that the filter is broken down is reduced.

Description

A radio frequency module and electronic device Technical Field

[0001] This application relates to the field of radio frequency technology, and in particular to a radio frequency module and electronic device. Background Technology

[0002] With the rapid development of wireless communication technology, the radio frequency (RF) front-end module, as a core component of the communication system, undertakes the critical functions of signal transmission and reception. Among these components, the power amplifier (PA) and filter are essential parts of the RF front-end module: specifically, the power amplifier is responsible for boosting signal power to meet the requirements of long-distance transmission, while the filter is used to filter out out-of-band interference and ensure signal quality. However, in practical applications, filters are prone to fuse failure and breakdown, causing irreversible damage. Summary of the Invention

[0003] In view of the above problems, this application provides an RF module and electronic device to reduce the probability of filter breakdown due to fuse failure in the RF module. The specific solution is as follows:

[0004] In a first aspect, this application provides a radio frequency module, comprising:

[0005] A power amplifier circuit, the power amplifier circuit including at least one power amplifier;

[0006] A filtering circuit, the filtering circuit including at least one filter, the output terminal of the filter being connected to the antenna port;

[0007] A phase-shifting circuit, located between the power amplifier circuit and the filter circuit, includes at least one phase shifter;

[0008] The input terminal of the phase shifter is connected to the output terminal of the power amplifier, and the output terminal of the phase shifter is connected to the input terminal of the filter. It is used to adjust the phase of the output signal of the power amplifier so that the peak position of the waveform of the output power of the power amplifier and the peak position of the waveform of the fusing power of the filter meet the same conditions.

[0009] In one possible implementation, the radio frequency module includes at least two signal transmission branches, each of which has a filter, and the filters in different signal transmission branches are connected to the same antenna port through a first radio frequency switch.

[0010] In one possible implementation, the power amplifier circuit includes at least two power amplifiers, and the phase shifting circuit includes at least two phase shifters; each of the signal transmission branches is provided with one power amplifier and one phase shifter.

[0011] In one possible implementation, the power amplifier circuit includes a power amplifier, and the phase shifting circuit includes at least two phase shifters; each of the signal transmission branches is provided with a phase shifter, and the phase shifters in different signal transmission branches are connected to the output of the same power amplifier through a second radio frequency switch.

[0012] In one possible implementation, the power amplifier circuit includes a power amplifier, and the phase shifting circuit includes a phase shifter;

[0013] The filters in different signal transmission branches are connected to the output of the same phase shifter via a third radio frequency switch.

[0014] In one possible implementation, the phase shifter includes a positive phase shift circuit or a negative phase shift circuit.

[0015] In one possible implementation, the phase shifter includes:

[0016] The first electrical component has a first end connected to the power amplifier and a second end connected to the filter. The first electrical component is either an inductor or a capacitor.

[0017] In one possible implementation, the phase shifter further includes at least one of the following:

[0018] The second electrical element has one end connected to the first end of the first electrical element and the other end grounded, with the second end opposite to the first end;

[0019] A third electrical element, one end of which is connected to the second end of the first electrical element, and the other end is grounded, with the second end opposite to the first end;

[0020] Wherein, when the first electrical element is an inductor, the second electrical element and the third electrical element are capacitors; when the first electrical element is a capacitor, the second electrical element and the third electrical element are inductors.

[0021] In one possible implementation, the phase shifter is a pre-packaged phase shifter element or the phase shifter achieves phase adjustment through a balanced-to-unbalanced converter structure.

[0022] Secondly, this application provides an electronic device including any of the radio frequency modules described above.

[0023] The radio frequency module and electronic device provided in this application include not only a power amplifier and a filter, but also a phase shifter located between the power amplifier and the filter. The phase shifter is used to adjust the phase of the output signal of the power amplifier so that the peak position of the waveform of the output power of the power amplifier and the peak position of the waveform of the fusing power of the filter meet the same condition. This ensures that when the output power of the power amplifier is at its maximum, the fusing power of the filter is at its maximum value. Consequently, when the output power of the power amplifier is at its maximum, the maximum withstand limit of the filter is increased, and the probability of the filter being blown and broken down is reduced, thereby maximizing the protection of the filter from breakdown. This greatly improves the standing wave withstand capability of the device without the need to optimize the filter. Attached Figure Description

[0024] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0025] Figure 1 is a schematic diagram showing the change of the output power of a power amplifier with respect to the phase of its output impedance.

[0026] Figure 2 is a schematic diagram showing the change of the filter's fusing power with the phase of the output impedance;

[0027] Figure 3 is a schematic diagram of the structure of a radio frequency module provided in an embodiment of this application;

[0028] Figure 4 is a schematic diagram of the structure of a radio frequency module provided in another embodiment of this application;

[0029] Figure 5 is a schematic diagram of the structure of a radio frequency module provided in another embodiment of this application;

[0030] Figure 6 is a schematic diagram of the structure of a radio frequency module provided in another embodiment of this application;

[0031] Figure 7 is a schematic diagram of the phase shifter in a radio frequency module provided in an embodiment of this application;

[0032] Figure 8 is a schematic diagram of the phase shifter in a radio frequency module provided in another embodiment of this application;

[0033] Figure 9 is a schematic diagram of the phase shifter in a radio frequency module provided in another embodiment of this application;

[0034] Figure 10 is a schematic diagram of the phase shifter in a radio frequency module provided in another embodiment of this application;

[0035] Figure 11 is a schematic diagram of the phase shifter in a radio frequency module provided in another embodiment of this application;

[0036] Figure 12 is a schematic diagram of the phase shifter in a radio frequency module provided in another embodiment of this application;

[0037] Figure 13 is a schematic diagram of the phase shifter in a radio frequency module provided in another embodiment of this application;

[0038] Figure 14 is a schematic diagram of the phase shifter in a radio frequency module provided in another embodiment of this application. Detailed Implementation

[0039] The embodiments of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0040] Various modifications and variations can be made to this application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, this application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the implementation methods provided in the embodiments of this application can be combined with each other without contradiction.

[0041] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] As described in the background section, in practical applications, filters are easily broken down by fuses, causing irreversible damage.

[0043] This is because, in practical applications, the standing wave ratio (VSWR) of the external antenna port of the RF module is difficult to achieve an ideal matching state (i.e., a VSWR of 1:1), resulting in reflected signals at the external antenna port and causing a certain degree of mismatch in the transmit power of the RF front-end module. The standing wave ratio (VSWR) is a measure of the ratio of the maximum to the minimum voltage on a transmission line, used to evaluate the reflection and matching characteristics of electromagnetic waves in the transmission line.

[0044] When the VSWR of the external antenna port deteriorates sharply (e.g., reaching 6:1), it will cause a severe mismatch in the transmit power of the RF front-end module and enhance the reflected signal. This reflected signal is transmitted to the output of the power amplifier, which will affect the VSWR of the power amplifier's output. This will cause changes in the output power, output voltage, or output current of the power amplifier. If the output power, output voltage, or output current of the power amplifier exceeds the maximum tolerance of the filter, it will cause the filter to be blown and broken down, resulting in irreversible damage.

[0045] As shown in Figures 1 and 2, Figure 1 is a schematic diagram of the phase change of the output power of the power amplifier with the output impedance, and Figure 2 is a schematic diagram of the phase change of the filter's fusing power with the output impedance. It can be seen from Figures 1 and 2 that the phase point corresponding to the maximum output power of the power amplifier (denoted as the first phase) is not the same phase point as the phase point corresponding to the maximum fusing power of the filter (denoted as the second phase). As a result, when the output power of the power amplifier is at its maximum, it is easy to exceed the maximum withstand limit of the filter, that is, the maximum withstand limit of the filter at the first phase, which causes the filter to be fused and broken down, resulting in irreversible damage.

[0046] In view of this, this application provides a radio frequency module, as shown in FIG3, the radio frequency module comprising:

[0047] A power amplifier circuit 10, the power amplifier circuit 10 including at least one power amplifier 11;

[0048] The filter circuit 20 includes at least one filter 21, the output of which is connected to the antenna port 40.

[0049] A phase shifting circuit 30 is located between the power amplifier circuit 10 and the filter circuit 20, and includes at least one phase shifter 31.

[0050] The input terminal of the phase shifter 31 is connected to the output terminal of the power amplifier 11, and the output terminal of the phase shifter 31 is connected to the input terminal of the filter 21. The phase shifter 31 is used to adjust the phase of the output signal of the power amplifier 11 so that the peak position of the waveform of the output power of the power amplifier 11 and the peak position of the waveform of the fusing power of the filter 21 meet the same conditions.

[0051] It should be noted that, in this embodiment, the condition that the peak position of the output power waveform of the power amplifier 11 and the peak position of the fuse power waveform of the filter 21 meet the same condition includes that the phase corresponding to the peak of the output power waveform of the power amplifier 11 and the phase corresponding to the peak of the fuse power waveform of the filter 21 are the same, and also includes that the phase corresponding to the peak of the output power waveform of the power amplifier 11 and the phase corresponding to the peak of the fuse power waveform of the filter 21 are substantially the same.

[0052] The radio frequency module provided in this application embodiment includes not only a power amplifier 11 and a filter 21, but also a phase shifter 31 located between the power amplifier 11 and the filter 21. The phase shifter 31 is used to adjust the phase of the output signal of the power amplifier 11, so that the peak position of the waveform of the output power of the power amplifier 11 and the peak position of the waveform of the fuse power of the filter 21 meet the same condition. This ensures that when the output power of the power amplifier 11 is at its maximum, the fuse power of the filter 21 is at its maximum value. Consequently, when the output power of the power amplifier 11 is at its maximum, the maximum withstand limit of the filter 21 is increased, reducing the probability of the filter 21 being blown and broken down. This maximizes the protection of the filter 21 from being broken down, greatly improving the standing wave withstand capability of the device without the need to optimize the filter 21.

[0053] Furthermore, when filter 21 is damaged, the output signal of power amplifier 11 transmitted to the input of filter 21 will generate a large standing wave ratio (VSWR), which will be reflected back to power amplifier 11. If the reflected signal is too large, it may damage power amplifier 11, such as causing it to break down. Therefore, the RF module provided in this application embodiment can not only protect filter 21 from breakdown to the maximum extent, but also reduce the probability of power amplifier 11 breaking down to a certain extent.

[0054] Optionally, in one embodiment of this application, the peak position of the waveform of the output power of the power amplifier 11 corresponds to the peak position of the waveform of the fuse power of the filter 21, and the trough position of the waveform of the output power of the power amplifier 11 corresponds to the trough position of the waveform of the fuse power of the filter 21. However, this application does not limit this, and it depends on the specific situation.

[0055] Based on the above embodiments, in one embodiment of this application, as shown in FIG3, the radio frequency module includes a signal transmission path. In this embodiment, each signal transmission branch includes a power amplifier 11, a filter 21, and a phase shifter 31. The signal transmission branch is composed of the power amplifier 11, the phase shifter 31, and the filter 21 connected in sequence. In another embodiment of this application, as shown in FIG4, the radio frequency module includes at least two signal transmission branches 50 to realize the transmission and reception of radio frequency signals in at least two frequency bands. This application does not limit this, and it depends on the specific situation.

[0056] The following description uses the example of a radio frequency module that includes at least two signal transmission branches to illustrate the radio frequency module provided in the embodiments of this application.

[0057] It should be noted that when the radio frequency module includes at least two signal transmission branches 50, as shown in Figure 4, a filter 21 is provided in one signal transmission branch 50, and the filters 21 in different signal transmission branches 50 are connected to the same antenna port 40 through the first radio frequency switch 60.

[0058] Optionally, in one embodiment of this application, continuing as shown in FIG4, the RF module includes at least two signal transmission branches 50. In this embodiment, the power amplification circuit includes at least two power amplifiers 11, the phase shifting circuit includes at least two phase shifters 31, and the filtering circuit includes at least two filters 21. The power amplifiers 11, the phase shifters 31, and the filters 21 correspond one-to-one. Each signal transmission branch 50 is provided with one power amplifier 11, one phase shifter 31, and one filter 21, so that in each signal transmission branch 50, the phase shifter 31 can adjust the phase of the output power of the power amplifier 11 for its corresponding power amplifier 11 and filter 21, thereby improving the consistency between the peak position of the waveform of the output power of the power amplifier 11 in each signal transmission branch 50 and the peak position of the waveform of the fusing power of the filter 21.

[0059] In another embodiment of this application, as shown in FIG5, the radio frequency module includes at least two signal transmission branches 50. In this embodiment, the power amplifier circuit includes a power amplifier 11, and the phase shifting circuit includes at least two phase shifters 31. Each signal transmission branch 50 is provided with a phase shifter 31, and the phase shifters 31 in different signal transmission branches 50 are connected to the output terminal of the same power amplifier 11 through a second radio frequency switch 70.

[0060] It should be noted that during the operation of the radio frequency module, the power amplifier 11 and the filter 21 generate significant heat. Under the same power, the radio frequency switch has lower insertion loss and generates less heat. Therefore, in this embodiment, different signal transmission branches 50 share the same power amplifier 11 through the second radio frequency switch 70, which can reduce the insertion loss and heat generation during the operation of the radio frequency module and reduce the probability of thermal damage to the filter 21.

[0061] In another embodiment of this application, as shown in FIG6, the power amplifier circuit includes a power amplifier 11, and the phase shifter 31 includes a phase shifter 31. The filters 21 in different signal transmission branches 50 are connected to the output terminal of the same phase shifter 31 through a third RF switch 80. That is, in this embodiment, different signal transmission branches 50 share the same power amplifier 11 and the same phase shifter 31 to reduce the probability of thermal damage to the filter 21, and at the same time simplify the structure of the RF module and reduce the cost of the RF module.

[0062] It should be noted that since the phase corresponding to the peak of the waveform of the fusing power of the filter 21 in different signal transmission branches 50 is not necessarily the same, compared with the different signal transmission branches 50 sharing a single phase shifter 31, setting a separate phase shifter 31 for each signal transmission branch 50 can better adjust the phase of the output power of the power amplifier 11, so that the peak position of the waveform of the output power of the power amplifier 11 in each signal transmission branch 50 satisfies the same condition as the peak position of the waveform of the fusing power of the filter 21.

[0063] Based on any of the above embodiments, in one embodiment of this application, the phase shifter 31 includes a positive phase shift circuit to increase the equivalent length of the transmission line between the power amplifier 11 and the filter 21, delaying the phase of the peak in the waveform of the output power of the power amplifier 11, thereby achieving phase adjustment of the waveform of the output power of the power amplifier 11. In another embodiment of this application, the phase shifter 31 includes a negative phase shift circuit to shorten the equivalent length of the transmission line between the power amplifier 11 and the filter 21, advancing the phase of the peak in the waveform of the output power of the power amplifier 11, thereby achieving phase adjustment of the waveform of the output power of the power amplifier 11. This application is not limited in this respect, as long as the phase adjustment of the waveform of the output power of the power amplifier 11 can be achieved.

[0064] Optionally, in one embodiment of this application, as shown in Figures 7 and 8, the phase shifter 31 includes a first electrical element 311. The first terminal A of the first electrical element 311 is connected to the power amplifier circuit, and the second terminal B is connected to the filter circuit. In one implementation of this embodiment, the first electrical element 311 can be an inductor, as shown in Figure 7, so that the phase shifter 31 delays the phase of the peak in the waveform of the output power of the power amplifier 11 by increasing the equivalent length of the transmission line between the power amplifier 11 and the filter 21, thereby achieving phase adjustment of the waveform of the output power of the power amplifier 11. In another implementation of this embodiment, the first electrical element 311 can be a capacitor, as shown in Figure 8, so that the phase shifter 31 advances the phase of the peak in the waveform of the output power of the power amplifier 11 by shortening the equivalent length of the transmission line between the power amplifier 11 and the filter 21, thereby achieving phase adjustment of the waveform of the output power of the power amplifier 11.

[0065] It should be noted that, in this embodiment, if each signal transmission branch 50 is provided with a power amplifier 11, a phase shifter 31, and a filter 21, as shown in Figure 4, then the first terminal A of the first electrical component 311 is directly connected to the power amplifier 11 in the power amplifier circuit, and the second terminal B is directly connected to the filter 21 in the filter circuit. If each signal transmission branch 50 is provided with a phase shifter 31, and the phase shifters 31 in different signal transmission branches 50 are connected to the output terminal of the same power amplifier 11 through a second RF switch 70, then the first terminal A of the first electrical component 311 is connected to the power amplifier 11 through the second RF switch 70, and the second terminal B is directly connected to the filter 21 in the filter circuit. If the filters 21 in different signal transmission branches 50 are connected to the output terminal of the same phase shifter 31 through a third RF switch 80, as shown in Figure 6, then the first terminal A of the first electrical component 311 is directly connected to the power amplifier 11, and the second terminal B is connected to each filter 21 in the filter circuit through the third RF switch 80.

[0066] Based on the above embodiments, in one embodiment of this application, as shown in Figures 9 and 10, the phase shifter 31 further includes a second electrical element 312, one end of which is connected to the first terminal A of the first electrical element 311, and the other end is grounded, so as to realize the phase adjustment of the waveform of the output power of the power amplifier 11 through the combination of the first electrical element 311 and the second electrical element 312; Optionally, in one embodiment of this application, as shown in Figure 9, the first electrical element 311 is an inductor and the second electrical element 312 is a capacitor; in another embodiment of this application, as shown in Figure 10, the first electrical element 311 is a capacitor and the second electrical element 312 is an inductor, so as to realize the phase adjustment of the waveform of the output power of the power amplifier 11 through the combination of inductor and capacitor.

[0067] In another embodiment of this application, as shown in Figures 11 and 12, the phase shifter 31 further includes a third electrical element 313, one end of which is connected to the second terminal B of the first electrical element, and the other end is grounded, so as to realize the phase adjustment of the waveform of the output power of the power amplifier 11 through the combination of the first electrical element 311 and the second electrical element 312; Optionally, in one embodiment of this application, as shown in Figure 11, the first electrical element 311 is an inductor and the third electrical element 313 is a capacitor; in another embodiment of this application, as shown in Figure 12, the first electrical element 311 is a capacitor and the third electrical element 313 is an inductor, so as to realize the phase adjustment of the waveform of the output power of the power amplifier 11 through the combination of inductor and capacitor.

[0068] In another embodiment of this application, as shown in Figures 13 and 14, the phase shifter 31 further includes a second electrical element 312 and a third electrical element 313. One end of the second electrical element 312 is connected to the first terminal A of the first electrical element 311, and the other end is grounded. One end of the third electrical element 313 is connected to the second terminal B of the first electrical element 311, and the other end is grounded. This combination of the first electrical element 311, the second electrical element 312, and the third electrical element 313 enables phase adjustment of the waveform of the output power of the power amplifier 11. Optionally, in one embodiment of this application, as shown in Figure 13, the first electrical element 311 is an inductor, and the second electrical element 312 and the third electrical element 313 are capacitors. In another embodiment of this application, as shown in Figure 14, the first electrical element 311 is a capacitor, and the second electrical element 312 and the third electrical element 313 are inductors. This application does not limit the specific choice of electrical element 311; the choice depends on the specific circumstances.

[0069] It should be noted that the phase shifter 31 can be implemented not only by a combination of inductors and capacitors, but also by other means.

[0070] Optionally, in one embodiment of this application, the phase shifter 31 is a pre-packaged phase shifter element, so as to achieve phase adjustment of the peak of the waveform of the output power of the power amplifier 11 by embedding the packaged phase shifter 31 element in the RF module; in another embodiment of this application, the phase shifter 31 can also be implemented in a BSW, that is, phase adjustment is achieved through a balanced-to-unbalanced converter structure (Balun). This application does not limit this, and it depends on the specific situation. Among them, BSW in the field of RF circuits usually refers to Balanced-to-Single-ended Waveguide, whose core function is to achieve efficient conversion between balanced signals (differential signals) and single-ended signals, while optimizing the phase characteristics of the signal transmission path through the waveguide structure.

[0071] It should be noted that when the VSWR of the antenna port is different, the phase corresponding to the maximum output power of the power amplifier 11 is a fixed value, and the phase corresponding to the maximum fusing power of the filter 21 is also a fixed value. Therefore, in this embodiment, the RF module can determine the phase corresponding to the maximum output power of the power amplifier 11 and the phase corresponding to the maximum fusing power of the filter 21 through individual simulation or testing. This facilitates the setting of the phase shifter 31, so that after the phase shifter 31 adjusts the phase of the output power of the power amplifier 11, the phase corresponding to the maximum output power of the power amplifier 11 and the phase corresponding to the maximum fusing power of the filter 21 can meet the same conditions. Taking the phase shifter 31 including inductors and / or capacitors as an example, when the number of inductors and / or capacitors included in the phase shifter 31 is different, the phase adjustment of the output power of the power amplifier 11 by the phase shifter 31 will be different. When the parameters of the inductors and / or capacitors included in the phase shifter 31 are different, the phase adjustment of the output power of the power amplifier 11 by the phase shifter 31 will also be different.

[0072] Accordingly, this application also provides an electronic device, which may include the radio frequency module provided in any of the above embodiments. Specifically, the radio frequency module includes:

[0073] A power amplifier circuit, the power amplifier circuit including at least one power amplifier;

[0074] A filtering circuit, the filtering circuit including at least one filter, the output terminal of the filter being connected to the antenna port;

[0075] A phase-shifting circuit, located between the power amplifier circuit and the filter circuit, includes at least one phase shifter;

[0076] The input terminal of the phase shifter is connected to the output terminal of the power amplifier, and the output terminal of the phase shifter is connected to the input terminal of the filter. It is used to adjust the phase of the output signal of the power amplifier so that the peak position of the waveform of the output power of the power amplifier and the peak position of the waveform of the fusing power of the filter meet the same conditions.

[0077] It should be noted that, in this embodiment, the condition that the peak position of the output power waveform of the power amplifier and the peak position of the fusing power waveform of the filter meet the same condition includes that the phase corresponding to the peak of the output power waveform of the power amplifier and the phase corresponding to the peak of the fusing power waveform of the filter are the same, and also includes that the phase corresponding to the peak of the output power waveform of the power amplifier and the phase corresponding to the peak of the fusing power waveform of the filter are substantially the same.

[0078] The RF module provided in this application includes not only a power amplifier and a filter, but also a phase shifter located between the power amplifier and the filter. The phase shifter is used to adjust the phase of the output signal of the power amplifier so that the peak position of the waveform of the output power of the power amplifier and the peak position of the waveform of the fuse power of the filter meet the same condition. This ensures that when the output power of the power amplifier is at its maximum, the fuse power of the filter is at its maximum value. Consequently, when the output power of the power amplifier is at its maximum, the maximum withstand limit of the filter is increased, reducing the probability of the filter being blown and broken down. This maximizes the protection of the filter from breakdown and greatly improves the standing wave withstand capability of the device without the need to optimize the filter.

[0079] Optionally, in one embodiment of this application, the radio frequency module includes a signal transmission path. In this embodiment, each signal transmission branch includes a power amplifier, a filter, and a phase shifter. The signal transmission branch is composed of a power amplifier, a phase shifter, and a filter connected in sequence. In another embodiment of this application, the radio frequency module includes at least two signal transmission branches to realize the transmission and reception of radio frequency signals in at least two frequency bands. This application does not limit this and it depends on the specific situation.

[0080] The following description uses the example of a radio frequency module that includes at least two signal transmission branches to illustrate the radio frequency module provided in the embodiments of this application.

[0081] It should be noted that when the radio frequency module includes at least two signal transmission branches, each signal transmission branch is provided with a filter, and the filters in different signal transmission branches are connected to the same antenna port through a first radio frequency switch.

[0082] Optionally, in one embodiment of this application, the radio frequency module includes at least two signal transmission branches. In this embodiment, the power amplification circuit includes at least two power amplifiers, the phase shifting circuit includes at least two phase shifters, and the filtering circuit includes at least two filters. The power amplifiers, phase shifters, and filters correspond one-to-one. Each signal transmission branch is provided with one power amplifier, one phase shifter, and one filter, so that in each signal transmission branch, the phase shifter can adjust the phase of the output power of the power amplifier for its corresponding power amplifier and filter, thereby improving the consistency between the peak position of the waveform of the output power of the power amplifier in each signal transmission branch and the peak position of the waveform of the fusing power of the filter.

[0083] In another embodiment of this application, the radio frequency module includes at least two signal transmission branches. In this embodiment, the power amplifier circuit includes a power amplifier, and the phase shifting circuit includes at least two phase shifters. Each signal transmission branch is provided with a phase shifter, and the phase shifters in different signal transmission branches are connected to the output terminal of the same power amplifier through a second radio frequency switch.

[0084] It should be noted that during the operation of the radio frequency module, the power amplifier and the filter generate significant heat. Under the same power, the radio frequency switch has lower insertion loss and generates less heat. Therefore, in this embodiment, different signal transmission branches share the same power amplifier through the second radio frequency switch, which can reduce the insertion loss and heat generation during the operation of the radio frequency module and reduce the probability of thermal damage to the filter.

[0085] In another embodiment of this application, the power amplifier circuit includes a power amplifier, the phase shifter includes a phase shifter, and the filters in different signal transmission branches are connected to the output of the same phase shifter through a third radio frequency switch. That is, in this embodiment, different signal transmission branches share the same power amplifier and the same phase shifter to reduce the probability of thermal damage to the filters, while simplifying the structure of the radio frequency module and reducing the cost of the radio frequency module.

[0086] It should be noted that since the phase corresponding to the peak of the waveform of the fusing power of the filter in different signal transmission branches is not necessarily the same, setting a phase shifter for each signal transmission branch, rather than sharing a single phase shifter, can better adjust the phase of the power amplifier's output power, so that the peak position of the waveform of the power amplifier's output power in each signal transmission branch meets the same condition as the peak position of the waveform of the filter's fusing power.

[0087] Since the relevant content of the radio frequency module has been described in the above embodiments, this application will not repeat it in detail.

[0088] In summary, the RF module and electronic device provided in this application embodiment not only include a power amplifier and a filter, but also a phase shifter located between the power amplifier and the filter. The phase shifter is used to adjust the phase of the output signal of the power amplifier so that the peak of the waveform of the output power of the power amplifier and the peak of the waveform of the fusing power of the filter meet the same conditions. This ensures that when the output power of the power amplifier is at its maximum, the fusing power of the filter is at its maximum value. Consequently, when the output power of the power amplifier is at its maximum, the maximum withstand limit of the filter is increased, and the probability of the filter being blown and broken down is reduced, thereby maximizing the protection of the filter from breakdown. This greatly improves the standing wave withstand capability of the device without the need to optimize the filter.

[0089] The various embodiments in this specification are described in a progressive, parallel, or combined manner. Each embodiment focuses on its differences from other embodiments, and similar or identical parts between embodiments can be referred to interchangeably. For the apparatuses disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0090] It should be noted that, in the description of this application, the accompanying drawings and embodiments are illustrative rather than restrictive. It should also be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in an article or device comprising the aforementioned element.

[0091] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A radio frequency module, characterized in that, include: A power amplifier circuit, comprising at least one power amplifier; a filter circuit, comprising at least one filter, the output of which is connected to an antenna port; and a phase shifter circuit, located between the power amplifier circuit and the filter circuit, comprising at least one phase shifter; wherein the input of the phase shifter is connected to the output of the power amplifier, and the output of the phase shifter is connected to the input of the filter, for adjusting the phase of the output signal of the power amplifier so that the peak position of the waveform of the output power of the power amplifier and the peak position of the waveform of the fusing power of the filter satisfy the same condition.

2. The radio frequency module according to claim 1, characterized in that, The radio frequency module includes at least two signal transmission branches, each of which is equipped with a filter. The filters in different signal transmission branches are connected to the same antenna port through a first radio frequency switch.

3. The radio frequency module according to claim 2, characterized in that, The power amplifier circuit includes at least two power amplifiers, and the phase shifting circuit includes at least two phase shifters; each of the signal transmission branches is provided with one power amplifier and one phase shifter.

4. The radio frequency module according to claim 2, characterized in that, The power amplifier circuit includes a power amplifier, and the phase shifting circuit includes at least two phase shifters; each of the signal transmission branches is provided with a phase shifter, and the phase shifters in different signal transmission branches are connected to the output terminal of the same power amplifier through a second radio frequency switch.

5. The radio frequency module according to claim 2, characterized in that, The power amplifier circuit includes a power amplifier, and the phase shifting circuit includes a phase shifter; filters in different signal transmission branches are connected to the output of the same phase shifter via a third radio frequency switch.

6. The radio frequency module according to any one of claims 1-5, characterized in that, The phase shifter includes a positive phase shift circuit or a negative phase shift circuit.

7. The radio frequency module according to claim 6, characterized in that, The phase shifter includes: a first electrical element, a first end of which is connected to the power amplifier and a second end of which is connected to the filter, wherein the first electrical element is an inductor or a capacitor.

8. The radio frequency module according to claim 7, characterized in that, The phase shifter further includes at least one of the following: a second electrical element, one end of which is connected to a first end of the first electrical element, and the other end is grounded, with the second end opposite to the first end; A third electrical element, one end of which is connected to the second end of the first electrical element, and the other end is grounded, with the second end opposite to the first end; wherein, when the first electrical element is an inductor, the second electrical element and the third electrical element are capacitors; when the first electrical element is a capacitor, the second electrical element and the third electrical element are inductors.

9. The radio frequency module according to any one of claims 1-5, characterized in that, The phase shifter is a pre-packaged phase shifter element or the phase shifter achieves phase adjustment through a balanced-to-unbalanced converter structure.

10. An electronic device, characterized in that, Includes the radio frequency module as described in any one of claims 1-9.

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