Multi-band phased array and electronics

Abstract

The present application discloses a multi-band phased array, comprising a plurality of branches coupled to a plurality of multi-band antennas, wherein each of the plurality of branches comprises a low noise amplifier and a power amplifier; the power amplifier and the low noise amplifier are used in a time-sharing manner to transmit and receive signals of a first frequency band and a second frequency band received by the multi-band phased array, wherein the first frequency band is different from the second frequency band and does not overlap; each of the plurality of branches further comprises a phase shifter, wherein the phase shifter is used to phase shift the signals of the first frequency band, and the phase shifter is also used to phase shift the signals of the second frequency band; the phase shifter comprises a first phase shifting branch and a second phase shifting branch, wherein the first phase shifting branch is used to phase shift the signals of the first frequency band; and the second phase shifting branch shifts the phase of the signals of the second frequency band.

Description

Technical Field

[0001] The present application relates to the field of wireless communications, and in particular to a multi-band phased array. Background Art

[0002] Due to the limited frequency resources in low frequency bands, wireless communication has inevitably developed to high frequencies. For example, the millimeter wave band has been widely studied due to its rich spectrum resources. As the frequency increases, high path loss limits its development. Phased array technology provides a possible solution. In the high-frequency communication field of 5G new radio (NR), the field of vehicle-mounted radar, and related technical fields, phased array technology has become an essential technical means.

[0003] In order to make full use of frequency resources, phased arrays that support multiple frequency bands have gradually become an important technical trend. Traditional phased arrays that support multiple frequency bands are generally designed as wide-band coverage phased arrays with single-ended input and output, which poses huge challenges to the power consumption and signal-to-noise ratio of the phased array. Summary of the invention

[0004] The embodiments of the present application provide a multi-band phased array, which improves power consumption and signal-to-noise ratio compared to traditional multi-band phased arrays.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, a multi-band phased array is provided, comprising: a plurality of branches coupled to a plurality of multi-band antennas, each of the plurality of branches comprising a low-noise amplifier; the low-noise amplifier is used to amplify signals of a first frequency band and a second frequency band received by the multi-band phased array, the first frequency band being different from and not overlapping with the second frequency band; the first low-noise amplifier comprises an input matching network, a signal amplifying circuit, a first output matching network, and a second output matching network; the input matching network is coupled to an input end of the signal amplifying circuit, and is used to input matching signals of the first frequency band and signals of the second frequency band; the first output matching network is coupled to the The first output end of the signal amplifying circuit, the second output matching network is coupled to the second output end of the signal amplifying circuit; the first low noise amplifier also includes a control circuit, the control circuit is used to select the first output end, and output the signal of the first frequency band output by the signal amplifying circuit; the control circuit is also used to select the second output end, and output the signal of the second frequency band output by the signal amplifying circuit; each of the multiple branches also includes a phase shifter, the phase shifter is used to phase shift the signal of the first frequency band output by the first output end, and the phase shifter is also used to phase shift the signal of the second frequency band output by the second output end.

[0007] Based on the above multi-band phased array architecture, the receiving and amplifying design of this architecture can flexibly receive signals of different frequency bands in a targeted manner to achieve better signal-to-noise ratio and better power consumption.

[0008] In a possible implementation, the center frequency of the first frequency band and the center frequency of the second frequency band differ by more than 30%. Based on the application scenarios of the signals of the above frequency bands, the signals of different frequency bands with large center frequency differences between the frequency bands can be output through the first output end or the second output end respectively, and the architecture of the multi-band phased array based on the above can further demonstrate advantages in signal-to-noise ratio and power consumption.

[0009] In a possible implementation, the multi-band phased array is used to receive the signal of the first frequency band and the signal of the second frequency band in time division. Based on the application scenario of the signal of the above frequency bands, one of the two output ends can be selected to achieve a higher system receiving gain.

[0010] In a possible implementation, the multi-band phased array is also used to receive signals in a third frequency band, which is different from but overlaps with the first frequency band. Signals in different frequency bands with similar center frequencies can reuse the same amplifier, which saves costs and further improves the bandwidth of the multi-band phased array receiving signal.

[0011] In a possible implementation, the control circuit is used to select the first output end to output the signal of the third frequency band amplified by the amplifier circuit. The signals of the first frequency band and the third frequency band with similar center frequencies can reuse the output end and amplification subcircuit of the same low noise amplifier, reuse the circuit module, and improve the utilization efficiency.

[0012] In a possible implementation, the multi-band phased array is used to simultaneously receive the signal of the first frequency band and the signal of the third frequency band. Since the center frequencies of the signals of the first frequency band and the third frequency band are close, simultaneous reception can optimize the bandwidth and gain without adding any additional burden to the signal amplification circuit.

[0013] In a possible implementation, the signal amplification circuit includes a first negative channel metal oxide semiconductor (NMOS) tube, a second NMOS tube and a third NMOS tube, the gate terminal of the first NMOS tube is coupled to the input matching network, the source terminal of the first NMOS tube is coupled to ground, the source terminal of the second NMOS tube and the source terminal of the third NMOS tube are commonly coupled to the drain terminal of the first NMOS tube; the control circuit is used to output a first enable signal and a second enable signal, the first enable signal is used to select the signal of the first frequency band by controlling the gate terminal of the second NMOS tube, and the second enable signal is used to select the signal of the second frequency band by controlling the gate terminal of the third NMOS tube; the drain terminal of the second NMOS tube is coupled to the first output matching network, and the drain terminal of the third NMOS tube is coupled to the second output matching network. The above-mentioned superimposed tube NMOS architecture is adopted, which can not only flexibly amplify signals of different frequency bands, but also play a good isolation effect on signals of different frequency bands.

[0014] In a possible implementation, the phase shifter includes a first phase shift branch and a second phase shift branch, wherein the first phase shift branch is coupled to the first output end and is used to phase shift the signal of the first frequency band outputted from the first output end; the second phase shift branch is coupled to the second output end and is used to phase shift the signal of the second frequency band outputted from the second output end. By using the above two branches to phase shift respectively, the phase shifter can phase shift signals of different frequency bands respectively, which reduces the difficulty of phase shifter design and increases the flexibility of phase shift function design of multi-band phased array.

[0015] In a possible implementation, the first phase shift branch includes a first mixer and a first phase shift unit, and the second phase shift branch includes a second mixer and a second phase shift unit; the first phase shift unit is coupled between the first mixer and a local oscillator signal generator; the second phase shift unit is coupled between the second mixer and the local oscillator signal generator. By adopting the local oscillator signal phase shift method, the multi-band phased array has more advantages in processing broadband signal phase shift.

[0016] In a possible implementation, the local oscillator signal generator includes a first local oscillator signal generator and a second local oscillator signal generator; the first phase shift unit is coupled between the first local oscillator signal generator and the first mixer; the second phase shift unit is coupled between the second local oscillator signal generator and the second mixer. By using the above-mentioned different local oscillator signal generators to provide local oscillator signals respectively, the design difficulty of the local oscillator signal generator of the multi-band phased array is reduced, and the flexibility is improved.

[0017] In a possible implementation, the first phase shift branch includes a third phase shifter, which is coupled between the first mixer and the intermediate frequency signal processor and is used to phase shift the intermediate frequency signal of the first phase shift branch; the second phase shift branch includes a fourth phase shifter, which is coupled between the second mixer and the intermediate frequency signal processor and is used to phase shift the intermediate frequency signal of the second phase shift branch. The combination of the intermediate frequency signal phase shift and the local oscillator signal phase shift greatly optimizes the design of the multi-frequency phased array combiner.

[0018] In a possible implementation, each of the multiple branches further includes a power amplifier, the power amplifier includes a first input matching network, a second input matching network, a power amplifier circuit, and an output matching network; the first input matching network is coupled to the first input end of the power amplifier circuit, the second input matching network is coupled to the second input end of the power amplifier circuit, and the output matching network is coupled to the output end of the power amplifier circuit; the power amplifier further includes a control circuit, the control circuit is used to select the first input end, input the signal of the first frequency band to be amplified by the power amplifier circuit; the control circuit is also used to select the second input end, input the signal of the second frequency band to be amplified by the power amplifier circuit. The integration of a power amplifier for multiple frequencies enables a multi-frequency phased array, and on the basis of the above implementation, the function of multi-frequency transceiver phase shift can be further realized.

[0019] In a possible implementation, each of the multiple branches further includes a power amplifier, the power amplifier includes a first input matching network, a second input matching network, a power amplifier circuit, and an output matching network; the first input matching network is coupled to the first input end of the power amplifier circuit, the second input matching network is coupled to the second input end of the power amplifier circuit, and the output matching network is coupled to the output end of the power amplifier circuit; the power amplifier further includes a control circuit, the control circuit is used to select the first input end, input the signal of the first frequency band to be amplified by the power amplifier circuit; the control circuit is also used to select the second input end, input the signal of the second frequency band to be amplified by the power amplifier circuit. The integration of a power amplifier for multiple frequencies enables a multi-frequency phased array, and on the basis of the above implementation, the function of multi-frequency transceiver phase shift can be further realized.

[0020] In a possible implementation, the power amplifier circuit includes a third NMOS tube, a fourth NMOS tube and a fifth NMOS tube, the drain terminal of the third NMOS tube is coupled to the power supply terminal through the output matching network, the gate terminal of the third NMOS tube is used to receive a bias voltage, and the drain terminal of the fourth NMOS tube and the drain terminal of the fifth NMOS tube are commonly coupled to the source terminal of the third NMOS tube; the control circuit is used to output a first enable signal and a second enable signal, the first enable signal is used to select the signal of the first frequency band to be amplified by controlling the gate terminal of the fourth NMOS tube, and the second enable signal is used to select the signal of the second frequency band to be amplified by controlling the gate terminal of the fifth NMOS tube; the gate terminal of the fourth NMOS tube is coupled to the first input matching network, and the source terminal of the fourth NMOS tube is coupled to ground; the gate terminal of the fifth NMOS tube is coupled to the second input matching network, and the source terminal of the fifth NMOS tube is coupled to ground.

[0021] In a possible implementation manner, the first input terminal of the power amplifier is coupled to the first output terminal of the low noise amplifier; and the second input terminal of the power amplifier is coupled to the second output terminal of the low noise amplifier.

[0022] In a second aspect, a multi-band phased array is provided, comprising: a plurality of branches coupled to a plurality of multi-band antennas, each of the plurality of branches comprising a power amplifier, the power amplifier being used to amplify a signal of a first frequency band and a signal of a second frequency band transmitted by the multi-band phased array, the first frequency band being different from and not overlapping with the second frequency band; the power amplifier comprising a first input matching network, a second input matching network, a power amplifier circuit, and an output matching network; the first input matching network is coupled to a first input end of the power amplifier circuit, the second input matching network is coupled to a second input end of the power amplifier circuit, and the output matching network is coupled to an output end of the power amplifier circuit; the power amplifier further comprises a control circuit, the control circuit being used to select the first input end, inputting a signal of a first frequency band to be amplified by the power amplifier circuit; the control circuit is also used to select the second input end, inputting a signal of a second frequency band to be amplified by the power amplifier circuit; each of the plurality of branches further comprises a phase shifter, the phase shifter being used to phase shift the signal of the first frequency band input by the first input end, and the phase shifter being also used to phase shift the signal of the second frequency band input by the second input end.

[0023] In a possible implementation, the center frequency of the first frequency band and the center frequency of the second frequency band differ by more than 30%. Based on the application scenarios of the signals in the above frequency bands, signals of different frequency bands with large center frequency differences between the frequency bands can be input through the first input terminal or the second input terminal respectively, and the transmission efficiency and power consumption of the multi-band phased array architecture based on the above can be further reflected.

[0024] In a possible implementation, the multi-band phased array is used to transmit the signal of the first frequency band and the signal of the second frequency band in time division. Based on the application scenario of the signals of the above frequency bands, one of the two input ends can be selected to achieve a higher system transmission gain.

[0025] In a possible implementation, the multi-band phased array is also used to transmit a signal in a third frequency band, which is different from but overlaps with the first frequency band. Signals in different frequency bands with similar center frequencies can reuse the amplification branch of the same PA, which saves costs and further improves the bandwidth of the multi-band phased array transmission signal.

[0026] In a possible implementation, the control circuit is used to select the first input terminal and input the signal of the third frequency band to be amplified by the power amplifier circuit. The signals of the first frequency band and the third frequency band with similar center frequencies can reuse the input terminal and amplification subcircuit of the same power amplifier, reuse the circuit module, and improve the utilization efficiency.

[0027] In a possible implementation, the multi-band phased array is used to simultaneously transmit the signal of the first frequency band and the signal of the third frequency band. Since the center frequencies of the signals of the first frequency band and the third frequency band are close, simultaneous reception can optimize the bandwidth and gain without adding any additional burden to the power amplifier circuit.

[0028] It should be understood that the multi-band phased array of the second aspect may also have other possible implementations. For details, reference may be made to the features of the multi-band phased array in the various possible implementations of the first aspect, which will not be repeated here.

[0029] According to a third aspect, a multi-band phased array is provided, comprising: a plurality of branches coupled to a plurality of multi-band antennas, each of the plurality of branches comprising a low noise amplifier and a power amplifier; the power amplifier and the low noise amplifier are used in a time-sharing manner to transmit and receive signals of a first frequency band and signals of a second frequency band received by the multi-band phased array, the first frequency band being different from and not overlapping with the second frequency band; each of the plurality of branches further comprising a phase shifter, the phase shifter being used to phase shift the signals of the first frequency band, and the phase shifter being also used to phase shift the signals of the second frequency band; the phase shifter comprising a first phase shifting branch and a second phase shifting branch, the first phase shifting branch being used to phase shift the signals of the first frequency band; the second phase shifting branch being used to phase shift the signals of the second frequency band.

[0030] It should be understood that there may be other possible implementations of a multi-band phased array in the third aspect. For details, reference may be made to the features of multi-band phased array in various possible implementations of the first and second aspects, which will not be repeated here.

[0031] In a fourth aspect, an electronic device is provided, including a transceiver, a memory and a processor; wherein the multi-band phased array mentioned above is arranged in the transceiver. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of a wireless communication system according to an embodiment of the present application;

[0033] Figure 2 A schematic diagram of multiple frequency bands according to an embodiment of the present application;

[0034] Figure 3 A schematic diagram of a phased array according to an embodiment of the present application;

[0035] Figure 4 This is a schematic diagram of the working principle of a phased array according to an embodiment of the present application;

[0036] Figure 5 This is a schematic diagram of a phased array transceiver architecture according to an embodiment of the present application;

[0037] Figure 6 This is a schematic diagram of a multi-frequency phased array LNA architecture according to an embodiment of the present application;

[0038] Figure 7 This is a schematic diagram of a specific implementation of a multi-frequency phased array LNA according to an embodiment of the present application;

[0039] Figure 8 This is a schematic diagram of a multi-frequency phased array PA architecture according to an embodiment of the present application;

[0040] Fig. 9This is a schematic diagram of a specific implementation of a multi-frequency phased array PA according to an embodiment of the present application;

[0041] Fig.10 This is a schematic diagram of a multi-frequency phased array phase shifter architecture according to an embodiment of the present application;

[0042] Fig.11 This is a schematic diagram of an electronic device according to an embodiment of the present application;

[0043] Fig.12 A schematic diagram of a smart phone according to an embodiment of the present application. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0045] In wireless communication systems, devices can be divided into devices that provide wireless network services and devices that use wireless network services. Devices that provide wireless network services refer to those devices that make up the wireless communication network, which can be referred to as network equipment or network elements. Network equipment usually belongs to operators (such as China Mobile and Vodafone) or infrastructure providers (such as tower companies), and these manufacturers are responsible for operation or maintenance. Network equipment can be further divided into radio access network (RAN) equipment and core network (CN) equipment. Typical RAN equipment includes base stations (BS).

[0046] It should be understood that a base station may sometimes also be referred to as an access point (AP) or a transmission reception point (TRP). Specifically, a base station may be a generation Node B (gNB) in a 5G new radio (NR) system or an evolutionary Node B (eNB) in a 4G long term evolution (LTE) system. Depending on the physical form or transmission power of the base station, the base station may be divided into a macro base station or a micro base station. A micro base station is sometimes also referred to as a small base station or a small cell.

[0047] Devices that use wireless network services are usually located at the edge of the network and can be referred to as terminals. Terminals can establish connections with network devices and provide users with specific wireless communication services based on the services of network devices. It should be understood that due to the closer relationship between terminals and users, they are sometimes also referred to as user equipment (UE) or subscriber units (SU). In addition, compared to base stations that are usually placed in fixed locations, terminals often move with users and are sometimes referred to as mobile stations (MS). In addition, some network devices, such as relay nodes (RN) or wireless routers, are sometimes considered terminals because they have UE identities or belong to users.

[0048] Specifically, the terminal can be a mobile phone, a tablet computer, a laptop computer, a wearable device (such as a smart watch, a smart bracelet, a smart helmet, and smart glasses), and other devices with wireless access capabilities, such as smart cars, various Internet of Things (IOT) devices, including various smart home devices (such as smart meters and smart appliances) and smart city devices (such as security or monitoring equipment, smart road traffic facilities), etc.

[0049] For ease of description, this application will take a base station and a terminal as an example to describe in detail the technical solution of the embodiments of the present application.

[0050] Figure 1 A schematic diagram of the structure of a wireless communication system provided in an embodiment of the present application. Figure 1 As shown, the wireless communication system includes a terminal, a base station A, a base station B, and a base station C.

[0051] In the wireless communication system, the wireless communication system may comply with the wireless communication standard of the third generation partnership project (3GPP), or may comply with other wireless communication standards, such as the wireless communication standard of the 802 series (such as 802.11, 802.15, or 802.20) of the Institute of Electrical and Electronics Engineers (IEEE).

[0052] Figure 1Although only three base stations and one terminal are shown in the figure, the wireless communication system may also include other numbers of terminals and base stations. In addition, the wireless communication system may also include other network devices, such as core network devices.

[0053] The terminal and the base station should be aware of the predefined configuration of the wireless communication system, including the radio access technology (RAT) supported by the system and the wireless resource configuration specified by the system, such as the basic configuration of the radio frequency band and carrier. The carrier is a frequency range that complies with the system regulations. This frequency range can be determined by the center frequency of the carrier (referred to as the carrier frequency) and the bandwidth of the carrier. These system-predefined configurations can be part of the standard protocol of the wireless communication system, or determined through interaction between the terminal and the base station. The content of the relevant standard protocol may be pre-stored in the memory of the terminal and the base station, or embodied in the hardware circuit or software code of the terminal and the base station.

[0054] In the wireless communication system, the terminal and the base station support one or more of the same RAT, such as 5G NR or RAT of a future evolution system. Specifically, the terminal and the base station use the same air interface parameters, coding scheme, modulation scheme, etc., and communicate with each other based on the wireless resources specified by the system.

[0055] Figure 1 The terminal with integrated phased array can be directed to base station A, base station B, and base station C through different configurations. Compared with traditional terminals, the terminal with phased array function can achieve more concentrated energy transmission through the function of phased array, thereby alleviating the path loss of signal transmission at high frequencies, especially in the millimeter wave frequency range, to a certain extent.

[0056] At the same time, in order to make more efficient use of spectrum resources, multiple different frequency bands are usually included in the radio frequency, especially the millimeter wave frequency range, and the terminal with phased array integrated with multiple frequency bands will give full play to the advantages of radio frequency communication. For example, the millimeter wave frequency bands of 5G defined by 3GPP include n257 (26.5GHz-29.500GHz), n260 (37GHz-40 GHz), n258 (24.25GHz-27.5G Hz), and n261 (27.5GHz-28.35GHz). Figure 2In the figure, n257 is identified as the first frequency band (Band1), n260 is identified as the second frequency band (Band2), n258 is identified as the third frequency band (Band3), and n261 is identified as the fourth frequency band (Band2). Band1 is different from Band2 and does not overlap. The center frequencies of the two are f1 (28GHz) and f2 (38.5GHz), f2 / f1=1.375, a difference of 37.5%. Band3 is also different from Band2 and does not overlap. The center frequencies of the two are f1 (25.875GHz) and f2 (38.5GHz), f2 / f1=1.488, a difference of nearly 50%. Similarly, Band4 is also different from Band2 and does not overlap. The center frequencies of the two are f1 (27.925GHz) and f2 (38.5GHz), f2 / f1=1.379, a difference of 38%. Band1 and Band3 are different, but they overlap. Similarly, Band1 and Band4 are also different, but they overlap.

[0057] It should be noted that the specific frequency range of Band1-Band4 mentioned here is only exemplary. When implemented, it can also be other values, and this application does not impose specific restrictions on this. In addition, although 5G currently only has the above-mentioned NR bands in the millimeter wave band, it should be understood that the technical solution provided in this application is also applicable to other bands in the millimeter wave band and other radio frequency bands.

[0058] Figure 3 This is a schematic diagram of a phased array architecture of an embodiment of the present application. As shown in the figure, the phased array that can be applied to the above embodiment may include multiple branches, and each branch includes a corresponding phase shifter. When the phased array needs to point to a specific direction to realize a beam in a specific direction, the signal of the corresponding branch can be phase shifted by the phase shifter in the phased array, so that a directional diagram in a specific direction can be obtained. When the phased array needs to dynamically cover multiple directions, the phased array can be implemented by phase scanning. Since the phased array system requires a larger scanning angle, there are certain requirements for the phase shift accuracy and phase shift range of the phase shifter of each branch. In order to facilitate system control, the phased array can optionally adopt the technology of digital phase shifters. Each branch needs to adjust the phase of each branch by changing the digital control bit within the phase shift range realized by n bits to achieve phase scanning.

[0059] Specifically, Figure 4 For example, Figure 4The phased array architecture shown includes 8 branches. In order to achieve full range coverage, each branch needs to implement a 3-bit digital phase shifter, that is, the phase range of the 8 branches is 0-7Ф, and the 8 branches correspond to the phase shift range of the digital control bit 000-111. Different bits have different phase shift accuracy. Taking 3 bits as an example, the lowest bit corresponds to a phase shift accuracy of 2 0 Ф=Ф, the phase shift accuracy corresponding to the middle bit is 2 1 Ф=2Ф, the phase shift accuracy corresponding to the highest bit is 2 2 Ф=4Ф. In this way, usually, 0-7Ф can achieve a phase shift range of 360 degrees, and each phase shift unit Ф is 45 degrees. The minimum phase shift of each branch is 0Ф, that is, 0 degrees, and the corresponding control word of the phase shifter bit is 000. The maximum phase shift is 7Ф, that is, 315 degrees, and the corresponding control word of the phase shifter bit is 111. In order to achieve higher phase scanning accuracy, the bit can be increased. For example, the digital phase shifter can also be a 4-bit digital phase shifter, and the minimum phase shift accuracy Ф of each branch can be 22.5 degrees. After understanding the working principle of the phased array, it can be understood that in order to realize the function of receiving signals, the phased array needs to integrate corresponding receiving links, such as low noise amplifiers, in each branch in the above embodiments. Similarly, in order to further realize the function of transmitting signals on the basis of the receiving function, the corresponding transmitting links, such as power amplifiers, can be further integrated. Optionally, the receiving link and the transmitting link may reuse the same phase shifter, or independent phase shifters may be configured on their respective links. The phase shifters in multiple branches may generate different phases when used for receiving or transmitting.

[0060] Figure 5 This is a schematic diagram of a phased array transceiver architecture according to an embodiment of the present application. Taking a radio frequency phased array as an example, the phased array shown in the figure includes multiple radio frequency branches, and each of the multiple radio frequency branches may include a corresponding radio frequency front end 1, and a corresponding phase shifter 2. The radio frequency front end 1 includes a low noise amplifier (LNA) 10 and a power amplifier (PA) 11. The low noise amplifier 10 is used to amplify the received signal coupled from the antenna of the corresponding branch, and the power amplifier 11 is used to amplify the power of the transmitted signal and output it to the antenna corresponding to the branch. Optionally, the phased array can also be designed to have only one of the functions of receiving or transmitting, and each corresponding branch can also include only one of the low noise amplifier 10 and the power amplifier 11.

[0061] Furthermore, each branch may also include a selector 12 for implementing duplex transmission and reception. When the transmission and reception of the phased array are in different frequency bands, the selector may be a duplexer for separating the transmission and reception signals into different frequency bands. When the transmission and reception are in different time slots, the selector may be a switch for turning on and off the same transmission signal and reception signal at different times. Optionally, the selector 13 may be located at the front end of the branch, that is, coupled to the Figure 4 The input end of the LNA and the output end of the PA are shown; the selector 13 can also be located at the back end of the branch, that is, coupled to the output end of the LNA and the input end of the PA, while the PA and the LNA are directly coupled to the antenna.

[0062] Each of the multiple RF branches of the phased array further includes a phase shifter for implementing a phase shifting function of each branch. For example, the phase shifter may be Figure 5 Phase shifter 2 is shown. Phase shifter 2 is coupled to the common node at the back end of PA11 and LNA10, that is, the output of LNA and the input of PA. Optionally, phase shifter 2 can also be coupled to the input of LNA and the output of PA. PA and LNA can reuse phase shifter 2, but this architecture of multiplexing the same phase shifter for transmission and reception is only applicable to time division duplex mode. When PA and LNA work in different frequency bands at the same time, PA and LNA generally need to be configured with a separate phase shifter on their respective transmission and reception paths.

[0063] When the phased array needs to integrate processing functions of two or more frequency bands, based on the above embodiments, the LNA and PA of the signal RF front end realizing two or more frequency bands are introduced below.

[0064] like Figure 6 As shown, the LNA has one input and two outputs. The input is used to receive signals in the first frequency band and signals in the second frequency band, the first output is used to output the amplified signals in the first frequency band, and the second output is used to output the amplified signals in the second frequency band. Compared with the LNA architecture with one input and one output for broadband reception, the LNA design with this architecture can flexibly receive signals in different frequency bands to achieve better signal-to-noise ratio and lower design cost.

[0065] Since two output terminals are used, if the output is output at the same time, compared with the architecture of a single output terminal, a 3dB gain reduction will be brought about. Preferably, in a scenario where the system gain requirement is high, one of the two output terminals can be selected. For a scenario where the system gain requirement is not high, the two output terminals can be selected at the same time.

[0066] In the specific receiving scenario, LNA can simultaneously meet the reception of signals in more than two frequency bands. Specifically, signals in different frequency bands with similar center frequencies can be output through one output end of this LNA, and signals in different frequency bands with large differences in center frequencies can be output through either the first output end or the second output end.

[0067] by Figure 2 Taking the millimeter wave frequency band of 5G as an example, when the first frequency band and the second frequency band are different and overlap, such as Band3 and Band1, Band4 and Band1, the signal of the first frequency band and the signal of the second frequency band can be output only by the same output end; when the center frequency between the first frequency band and the second frequency band is similar, such as less than 10%, such as Band3 and Band1, the signal of the first frequency band and the signal of the second frequency band can also be output only by the same output end; but when the two frequency bands are different, there is no overlap, and the difference between the center frequencies between the frequency bands is greater than 30%, such as the combination of Band2 and Band1, Band3, Band4, the signal of the first frequency band and the signal of the second frequency band are output by the first output end and the second output end of the LNA respectively.

[0068] For example, in a scenario where the gain requirement is high, the LNA may support simultaneous reception of signals of one or more frequency bands of the combination of B1, B3, and B4, but time-sharing reception of signals of the B2 frequency band and the combination of frequency bands.

[0069] Figure 7 This is a schematic diagram of a specific implementation of a multi-frequency phased array LNA according to an embodiment of the present application. The LNA includes an input matching network 101, a signal amplifying circuit 102, a first output matching network 103, a second output matching network 104, and a control circuit 105. The input matching network 101 is coupled between the input end of the LNA and the input end of the signal amplifying circuit 102. The two output ends of the signal amplifying circuit 102 are coupled to the first output end and the second output end of the LNA, respectively. The first output end of the LNA is coupled to the first output matching network 103, and the second output end of the LNA is coupled to the second output matching network 104. The control circuit 105 is coupled to the signal amplifying circuit 102 and is used to control the output of the signal amplifying circuit 102.

[0070] Specifically, the input matching network 101 is coupled between the input end of the LNA and the amplifier circuit to achieve input matching of the LNA. Since the signals of different frequency bands received by the input end of the LNA are input to the input end of the amplifier circuit through the same input matching network. Preferably, the input matching network may include a transformer, that is, a first inductor coil and a second inductor coil that are mutually coupled and nested, to achieve broadband matching. Furthermore, the input matching network may also include an adjustable capacitor to further achieve a frequency adjustment function.

[0071] Optionally, the signal amplifying circuit may also include two independent amplifying sub-circuits, the input ends of the two amplifying sub-circuits are coupled to the input matching network 101 , and the output ends of the two amplifying sub-circuits are coupled to two output matching networks 103 and 104 , respectively.

[0072] Preferably, the signal amplifying circuit 102 may include a first amplifier tube 1021. The input end of the first amplifier tube 1021 is coupled to the input matching network 101, and the output end of the first amplifier tube 1021 is coupled to the second amplifier tube 1022 and the third amplifier tube 1023 respectively. Optionally, the first amplifier tube 1021, the second amplifier tube 1022 and the third amplifier tube 1023 can all be negative channel metal oxide semiconductor (NMOS) tubes. The gate of 1021 is coupled to the input matching network 101, and the source level is coupled to ground. The drain is coupled to the source levels of 1022 and 1023.

[0073] The drains of 1022 and 1023 are coupled to the power supply terminal through the first output matching network 103 and the second output matching network 104, respectively, and the gates of 1023 and 1022 are used to receive the bias voltage. Optionally, the first amplifier tube 1021, the second amplifier tube 1022 and the third amplifier tube 1023 can also be positive channel metal oxide semiconductor (PMOS) tubes, and the connection method of the gate is consistent with the NMOS type, and the connection method of the drain and source can be adjusted accordingly. Compared with two independent receiving sub-circuits, the signal amplification circuit 102 has more advantages in area and power consumption noise design.

[0074] The control circuit 105 is coupled to the signal amplifier circuit 102, and outputs a first enable signal C1 and a second enable signal C2, which are used to select the first output terminal and the second output terminal of the amplifier circuit. Optionally, the control circuit 105 may not include a bias voltage module. The control enable signals C1 and C2 may be digital enable signals, which are used to output corresponding digital control signals representing enable to the bias voltage module located in the amplifier circuit. The bias voltage module outputs corresponding power supply voltage and shutdown voltage according to the digital enable signal to turn on and off the second amplifier tube 1022 and the third amplifier tube 1023, so as to realize the respective selection of the first output terminal and the second output terminal of the LNA.

[0075] Optionally, the control circuit 105 may also include a bias voltage module, and the control enable signals C1 and C2 may be analog enable signals, which directly output corresponding power supply voltage and shutdown voltage to the signal amplifying circuit 102 to turn on and off the second amplifying tube 1022 and the third amplifying tube 1023 to achieve respective gating of the first output terminal and the second output terminal of the LNA.

[0076] The first output matching network 103 and the second output matching network 104 are used for matching the first frequency band and the second frequency band respectively. Preferably, the matching network design does not need to be designed as a broadband mode. The two output matching networks are designed to match the corresponding frequency bands. In circuit design, the two can adopt but are not limited to parallel inductor and capacitor networks. The capacitor can be designed as an adjustable capacitor for achieving frequency adjustment within a certain range in a specific frequency band. When the first frequency band is lower than the second frequency band, the layout size of the inductor in 103 is designed to be larger than the size of 104 to optimize the chip area and the corresponding quality factor.

[0077] The architecture of multi-band PA is as follows Figure 8 As shown, the PA includes two input terminals and one output terminal. The first input terminal is used to input a signal of a first frequency band to be amplified, the second input terminal is used to input a signal of a second frequency band to be amplified, and the output terminal is used to output the amplified signal of the first frequency band and the signal of the second frequency band. Figure 8 The PA architecture shown can flexibly control the output according to the characteristics of signals in different frequency bands. Compared with the broadband transmission A architecture with one input and one output, the PA design of this architecture can flexibly transmit signals in different frequency bands in a targeted manner to achieve better transmission efficiency and lower design cost. Preferably, in scenarios where the system transmission power requirements are high, one of the two input terminals can be selected. For scenarios where the system transmission power requirements are not high, the two input terminals can be selected at the same time. Figure 8 The PA architecture shown can also meet the transmission of signals in more than two frequency bands. Specifically, signals in different frequency bands with similar center frequencies can be input through one input terminal of the PA, and signals in different frequency bands with large center frequencies can be input through either the first input terminal or the second input terminal.

[0078] Exemplarily, taking the frequency band of Example 2 as an example, in a scenario with high transmission power requirements, the PA can support simultaneous transmission of signals of one or more frequency bands of the combination of B1, B3, and B4, but transmit the signals of the B2 frequency band and the combination of this frequency band in a time-sharing manner.

[0079] Fig. 9This is a schematic diagram of a specific implementation of a multi-frequency phased array PA according to an embodiment of the present application. The PA includes an output matching network 111, a power amplifier circuit 112, a first input matching network 113, a second input matching network 114, and a control circuit 115. The output matching network 111 is coupled between the output end of the PA and the output port of the power amplifier circuit 112. The power amplifier circuit 112 includes two input ports, which are respectively coupled to the first input end and the second input end of the PA. The first input end of the PA is coupled to the first input matching network 113, and the second input end of the PA is coupled to the second output matching network 114. The control circuit 115 is coupled to the power amplifier circuit 112 for controlling the input selection of the power amplifier circuit 112.

[0080] Specifically, the output matching network 111 is coupled between the output end of the PA and the power amplifier circuit 112 to achieve output matching of the PA. Since the signals of different frequency bands outputted from the output end of the PA are all outputted through the same output matching network 111. Preferably, the output matching network 111 may include a transformer, that is, a first inductor coil and a second inductor coil that are mutually coupled and nested, to achieve broadband matching. Furthermore, the output matching network 111 may also include an adjustable capacitor to further achieve a frequency adjustment function.

[0081] The power amplifier circuit 112 coupled to the output matching network 111 may include two independent amplifier sub-circuits, the output ends of the two amplifier sub-circuits are coupled to the output matching network 111, and the input ends of the two amplifier sub-circuits are respectively coupled to the first input end and the second input end of the PA.

[0082] Preferably, the power amplifier circuit 112 may include a first amplifier tube 1121, a second amplifier tube 1122, and a third amplifier tube 1123. The output end of the first amplifier tube 1121 is coupled to the output matching network 111, and the input end of the first amplifier tube 1121 is coupled to the second amplifier tube 1122 and the third amplifier tube 1123, respectively. Optionally, the first amplifier tube 1121, the second amplifier tube 1122, and the third amplifier tube 1123 can all be NMOS tubes. The drain of 1121 is coupled to the output matching network 111, the gate is used to couple the bias voltage, and the source is coupled to the drain of 1122 and 1123. The source of 1122 and 1123 is coupled to ground, and the gate of 1123 and 1122 is used to couple to the first input end and the second input end of the PA, respectively. Optionally, the first amplifier tube 1121, the second amplifier tube 1122 and the third amplifier tube 1123 can also be PMOS tubes, the connection method of the gate is consistent with the NMOS type, and the connection method of the drain and the source can be adjusted accordingly. Compared with two independent receiving sub-circuits, the architecture of the power amplifier circuit 112 has more advantages in area and amplification efficiency.

[0083] The control circuit 115 is coupled to the power amplifier circuit 112, and outputs a first enable signal C1 and a second enable signal C2, which are respectively used to select the second amplifier tube 1122 and the third amplifier tube 1123 of the amplifier circuit. Optionally, the control circuit 115 may not include a bias voltage module. The control enable signals C1 and C2 may be digital enable signals, which are used to output corresponding digital control signals to the bias voltage module located in the amplifier circuit. The bias voltage module outputs corresponding power supply voltage and shutdown voltage according to the digital enable signal to open and close the second amplifier tube 1122 and the third amplifier tube 1123, so as to realize the selection and closing of the first input terminal and the second input terminal of the PA.

[0084] Optionally, the control circuit 115 may also include a bias voltage module, and the control enable signals C1 and C2 may be analog enable signals, which directly output corresponding power supply voltage and shutdown voltage to the power amplifier circuit 112 to turn on and off the second amplifier tube 1122 and the third amplifier tube 1123 to realize the selection and closing of the first input terminal and the second input terminal of the PA.

[0085] The first input matching network 113 and the second input matching network 114 are used for matching the first input terminal and the second input terminal of the PA, respectively. Preferably, the matching network design does not need to be designed as a broadband mode like the input matching network. The two output matching networks are designed for narrowband matching modes, and the corresponding frequency bands can be matched. In circuit design, the two can adopt but are not limited to parallel inductor and capacitor networks. The capacitor can be designed as an adjustable capacitor to achieve frequency adjustment within a certain range in a specific frequency band. When the first frequency band is lower than the second frequency band, the layout size of the inductor in 103 is designed to be larger than the size of 104 to optimize the chip area and the corresponding quality factor.

[0086] For multi-frequency phased arrays, in addition to the design of the multi-frequency RF front end, the core is to realize the function of multi-frequency phase shifting. Considering the RF front end of LNA and PA used to process multi-frequency in the above embodiments, in the preferred scheme, different amplifier sub-circuits are used to process signals of different frequency bands with large center frequency differences, and the same amplifier sub-circuit is used to process signals of different frequency bands with close center frequency differences. A similar idea can also be used in the design of a multi-frequency phase shifter.

[0087] Fig.10 Schematic diagram of a multi-frequency phased array phase shifter architecture according to an embodiment of the present application. Fig.10The invention comprises a first phase shift branch 21 coupled to the first end and a second phase shift branch 22 coupled to the second end. Specifically, the first phase shift branch 21 and the second phase shift branch 22 can be used to perform phase shift on signals of different frequency bands with large center frequency differences, and signals of different frequency bands with close center frequency differences can be phase shifted using the first phase shift branch 21 or the second phase shift branch 22 alone.

[0088] Exemplarily, taking the frequency band of Example 2 as an example, the first phase shift branch can be used to phase shift the signals of one or more frequency bands of the combination of B1, B3, and B4, and the second phase shift branch can be used to phase shift the signals of the B2 frequency band.

[0089] Specifically, the first phase shift branch may include one or more of the phase shift units 210 , 213 and 212 . Similarly, the second phase shift branch may also be one or more of the RF phase shift units 220 , 223 and 222 .

[0090] The first end of the first phase shift branch may be coupled to one or both of the first output end of the LNA and the first input end of the PA in the above embodiment.

[0091] The second end of the first phase shift branch may be coupled to one or both of the second output end of the LNA and the second input end of the PA in the above embodiment.

[0092] Phase shift unit 210 is coupled between mixer 211 and the first end of the phase shifter, and phase shift unit 220 is coupled between mixer 221 and the second end of the phase shifter. The two phase shift units are respectively used to phase shift the RF signals of their respective branches. This phase shift is called RF signal phase shift, which is the mainstream phase shift method at present. Phase shift unit 213 is coupled between local oscillator 214 and mixer 211, and phase shift unit 223 is coupled between local oscillator 224 and mixer 221. Each of them phase shifts the local oscillator signal before entering its respective mixer to achieve phase shift of its respective branch. This phase shift is called local oscillator signal phase shift, which is more suitable for broadband or multi-band signals compared with the previous RF signal phase shift.

[0093] Optionally, the first phase shift branch 21 and the second phase shift branch 22 may reuse the same phase shift unit 213. The local oscillator signals generated by the local oscillator 214 and the local oscillator 224 are selectively time-divisionally passed through the same phase shift unit 213 and then selectively enter their respective mixers.

[0094] Furthermore, on the basis of multiplexing the same phase shift unit 213, the first phase shift branch 21 and the second phase shift branch 22 can also multiplex the same local oscillator. The oscillator is designed as a wideband oscillator, which outputs local oscillation signals of different frequency bands in time-sharing, and enters the respective mixers in time-sharing through the same phase shift unit.

[0095] Optionally, the first phase-shift branch 21 may also include a phase shifter 212, which is coupled between the mixer 211 and the intermediate frequency signal processor of the corresponding branch, and the second phase-shift branch 22 may also include a phase shifter 222, which is coupled between the mixer 221 and the intermediate frequency signal processor of the corresponding branch. The intermediate frequency signal processor includes but is not limited to a filter, an analog-to-digital converter, and a digital-to-analog converter. This phase shift is called intermediate frequency signal phase shifting. Compared with the above two phase shifting methods, this phase shifting architecture simplifies the design of combining and branching multiple RF branches in the phased array. Specifically, in the processing of received signals, each RF branch can combine the received signal after intermediate frequency phase shifting after mixing. In the processing of transmitted signals, the transmitted signal can branch the received signal at the intermediate frequency before mixing, and then complete the intermediate frequency phase shift separately, and then provide it to each RF branch.

[0096] Preferably, the multi-frequency phase shifter may include a combination of intermediate frequency signal phase shifting and local oscillator signal phase shifting. Compared with separate RF signal phase shifting and local oscillator signal phase shifting, this phase shift combination simplifies the design of the phase shift circuit and has a smaller circuit area and better performance.

[0097] Optionally, in different multi-frequency phase shifting scenarios, the multi-frequency phase shifter may include various combinations of the above multiple phase shifting units, making full use of the individual or combined advantages of various phase shifting units.

[0098] Preferably, when using local oscillator signal phase shifting, since each RF branch in the phased array has the same operating frequency, each RF branch can use the same local oscillator signal generator, which is then phase shifted by the local oscillator signal phase shifting unit of each branch and then provided to the mixer of each branch.

[0099] The present application also provides an electronic device 300, please refer to Fig.10 The electronic device 300 may include a transceiver 301, a memory 304 and a processor 303, wherein the transceiver 301 is provided with the above-mentioned phased array 302.

[0100] It should be understood that the electronic device 300 here can be specifically a terminal device such as a smart phone, a computer, a smart watch, etc. Fig.11The smartphone 310 shown is used as an example, which may specifically include a processor 3102, a memory 3103, a communication circuit, an antenna, and an input-output device. The processor 3102 is mainly used to process the communication protocol and communication data, and to control the entire smartphone, execute software programs, and process the data of the software programs, for example, to support the smartphone 310 to perform the actions described in the above method embodiment. The memory 3103 is mainly used to store software programs and data. The communication circuit is mainly used for conversion between baseband signals and radio frequency signals and processing of radio frequency signals, and the communication circuit includes the above-mentioned phased array. The communication circuit is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input-output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users.

[0101] When the smartphone 310 is turned on, the processor 3102 can read the software program in the memory 3103, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 3102 performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal outward in the form of electromagnetic waves through the antenna. When data is sent to the smartphone 310, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 3102. The processor 3102 converts the baseband signal into data and processes the data.

[0102] Those skilled in the art will appreciate that for ease of description, Fig.11 Only one memory and one processor are shown. In an actual terminal device, there may be multiple processors and multiple memories. The memory may also be referred to as a storage medium or a storage device. It should be noted that the embodiment of the present application does not limit the type of memory.

[0103] It should be understood that the Xth frequency band mentioned in this application, such as the first frequency band, the second frequency band, the third frequency band, and the fourth frequency band, refers to a fixed frequency range defined by a standard organization or commercially used, including but not limited to the 5G millimeter wave frequency bands defined by 3GPP in the embodiments of the present application, including n257 (26.5GHz-29.500GHz), n260 (37GHz-40 GHz), n258 (24.25GHz-27.5G Hz), and n261 (27.5GHz-28.35GHz).

[0104] It should be understood that the signal of the Xth frequency band mentioned in this application, such as the signal of the first frequency band, the signal of the second frequency band, the signal of the third frequency band, and the signal of the fourth frequency band, refers to the signal transmitted in the Xth frequency band. The signal can be a signal of the entire bandwidth or a partial bandwidth transmitted in the Xth frequency band. For example, the corresponding signal of the n257 frequency band includes but is not limited to the signal 1 with a frequency range of 26.5G-27G, the signal 2 of 27G-28G, the signal 3 of 27G-29.5G, and the signal 4 of 26.5G-29.5G.

[0105] It should be understood that in the present application, the size of the sequence number of each process does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. The term "coupling" mentioned in the present application is used to express the intercommunication or interaction between different components, which may include direct connection or indirect connection through other components. For example, the XX end is coupled to ground, which means that the XX end can be directly grounded or grounded through another device.

[0106] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A multi-band phased array, characterized in that: include: a plurality of branches coupled to the plurality of multi-band antennas, each branch of the plurality of branches comprising a low noise amplifier; The low noise amplifier is used to amplify signals of a first frequency band and a second frequency band received by the multi-band phased array, wherein the first frequency band is different from the second frequency band and has no overlap; The low noise amplifier comprises an input broadband matching network, a signal amplifying circuit, a first output matching network, and a second output matching network; the input broadband matching network is coupled to the input end of the signal amplifying circuit, and is used to match the millimeter wave signal including at least the signal of the first frequency band and the signal of the second frequency band; The first output matching network is coupled to the first output terminal of the signal amplifying circuit, and the second output matching network is coupled to the second output terminal of the signal amplifying circuit; The low noise amplifier further comprises a first control circuit, the first control circuit being used to select the first output terminal to output the signal of the first frequency band output by the signal amplifying circuit; the first control circuit is also used to select the second output terminal to output the signal of the second frequency band output by the signal amplifying circuit; Each of the multiple branches further includes a phase shifter, which is used to phase shift the signal of the first frequency band output by the first output end, and the phase shifter is also used to phase shift the signal of the second frequency band output by the second output end.

2. The multi-band phased array according to claim 1, characterized in that: The difference between the center frequency of the first frequency band and the center frequency of the second frequency band is greater than 30%.

3. The multi-band phased array according to claim 2, characterized in that: The multi-band phased array is used for receiving signals in the first frequency band and signals in the second frequency band in a time-sharing manner.

4. The multi-band phased array according to claim 1, characterized in that: The multi-band phased array is further used to receive signals in a third frequency band, where the third frequency band is different from but overlaps with the first frequency band.

5. The multi-band phased array according to claim 4, characterized in that: The first control circuit is used to select the first output terminal to output the signal in the third frequency band amplified by the signal amplifying circuit.

6. The multi-band phased array according to any one of claims 4 to 5, characterized in that: The multi-band phased array is used to simultaneously receive signals in the first frequency band and signals in the third frequency band.

7. The multi-band phased array according to claim 1, characterized in that: The signal amplification circuit comprises a first NMOS tube, a second NMOS tube and a third NMOS tube, the gate terminal of the first NMOS tube is coupled to the input broadband matching network, the source terminal of the first NMOS tube is coupled to the ground, and the source terminal of the second NMOS tube and the source terminal of the third NMOS tube are commonly coupled to the drain terminal of the first NMOS tube; The first control circuit is used to output a first enable signal and a second enable signal, the first enable signal is used to select the signal of the first frequency band by controlling the gate end of the second NMOS tube, and the second enable signal is used to select the signal of the second frequency band by controlling the gate end of the third NMOS tube; A drain terminal of the second NMOS transistor is coupled to the first output matching network, and a drain terminal of the third NMOS transistor is coupled to the second output matching network.

8. The multi-band phased array according to claim 1, characterized in that: The phase shifter includes a first phase shift branch and a second phase shift branch. The first phase shift branch is coupled to the first output end and is used to phase shift the signal of the first frequency band output from the first output end; the second phase shift branch is coupled to the second output end and is used to phase shift the signal of the second frequency band output from the second output end.

9. The multi-band phased array according to claim 8, characterized in that: The first phase-shifting branch includes a first mixer and a first phase-shifting unit, and the second phase-shifting branch includes a second mixer and a second phase-shifting unit; The first phase shift unit is coupled between the first mixer and the local oscillator signal generator; the second phase shift unit is coupled between the second mixer and the local oscillator signal generator.

10. The multi-band phased array according to claim 9, characterized in that: The local oscillator signal generator includes a first local oscillator signal generator and a second local oscillator signal generator; The first phase shift unit is coupled between the first local oscillator signal generator and the first mixer; the second phase shift unit is coupled between the second local oscillator signal generator and the second mixer.

11. The multi-band phased array according to claim 9, characterized in that: The first phase shift branch further includes a third phase shifter, which is coupled between the first mixer and the intermediate frequency signal processor and is used for phase shifting the intermediate frequency signal of the first phase shift branch; The second phase shift branch further includes a fourth phase shifter, which is coupled between the second mixer and the intermediate frequency signal processor and is used for phase shifting the intermediate frequency signal of the second phase shift branch.

12. The multi-band phased array according to claim 1, characterized in that: Each of the multiple branches further includes a power amplifier, the power amplifier includes a first input matching network, a second input matching network, a power amplifier circuit, and an output broadband matching network; the first input matching network is coupled to a first input end of the power amplifier circuit, the second input matching network is coupled to a second input end of the power amplifier circuit, and the output broadband matching network is coupled to an output end of the power amplifier circuit; The power amplifier also includes a second control circuit, which is used to select the first input end and input the signal of the first frequency band to be amplified by the power amplifier circuit; the second control circuit is also used to select the second input end and input the signal of the second frequency band to be amplified by the power amplifier circuit.

13. The multi-band phased array according to claim 12, characterized in that: The power amplifier circuit includes a third NMOS tube, a fourth NMOS tube and a fifth NMOS tube, the drain terminal of the third NMOS tube is coupled to the power supply terminal through the output broadband matching network, the gate terminal of the third NMOS tube is used to receive a bias voltage, and the drain terminal of the fourth NMOS tube and the drain terminal of the fifth NMOS tube are commonly coupled to the source terminal of the third NMOS tube; The second control circuit is used to output a third enable signal and a fourth enable signal, the third enable signal is used to select the signal of the first frequency band to be amplified by controlling the gate end of the fourth NMOS tube, and the fourth enable signal is used to select the signal of the second frequency band to be amplified by controlling the gate end of the fifth NMOS tube; The gate terminal of the fourth NMOS tube is coupled to the first input matching network, and the source terminal of the fourth NMOS tube is coupled to the ground; The gate terminal of the fifth NMOS tube is coupled to the second input matching network, and the source terminal of the fifth NMOS tube is coupled to the ground.

14. The multi-band phased array according to claim 12, characterized in that: The first input terminal of the power amplifier is coupled to the first output terminal of the low noise amplifier; the second input terminal of the power amplifier is coupled to the second output terminal of the low noise amplifier.

15. An electronic device, characterized in that: It comprises a transceiver, a memory and a processor; wherein the transceiver is provided with a multi-band phased array as claimed in any one of claims 1 to 14.

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