A low-cost sub-array digital cylindrical active phased array

Abstract

The present invention proposes a low-cost sub-array digital cylindrical active phased array, comprising N analog active linear arrays, M 1-cut N / M-way radio frequency switches, an M-channel digital transceiver module, a beam control module, and a power supply module; wherein N, M, and N / M are all positive integers; the N analog active linear arrays are mounted on an array skeleton to form a cylindrical array, the radio frequency paths of each linear array being connected to the branch ports of the M 1-cut N / M-way radio frequency switches; the main ports of the M 1-cut N / M-way radio frequency switches being connected to the M-channel digital transceiver module; the beam control module and the power supply module providing control and power for the analog active linear arrays and radio frequency switches. The active phased array proposed in the present invention eliminates the interconnecting cables and connectors connecting the active transceiver channels to the antenna units, thereby reducing costs. At the same time, interconnection losses are reduced, the noise coefficient of the active phased array is lowered, and detection power is improved. The introduction of radio frequency switches to implement azimuth beam scanning switching also greatly reduces the channel size of equipment such as the digital transceiver module, further reducing costs.

Description

Technical Field

[0001] The invention belongs to the field of active phased arrays and relates to a low-cost sub-array digital cylindrical active phased array. Background Art

[0002] Active phased arrays play an important role in the field of radar detection. They adopt a distributed active transceiver circuit architecture. Each antenna unit corresponds to an independent active transceiver channel. The beam direction and shape are changed by electronic control to scan and cover the target area. The beam direction switching speed is fast, the data rate is high, the beam shaping is flexible, and it has excellent technical performance and system reliability.

[0003] In traditional active phased array systems, array antenna elements and transceiver components are designed separately, with RF interconnection achieved using a wiring layer. The number of connectors and cables in the wiring layer is proportional to the array size, and system cost and complexity increase dramatically with the array size. Furthermore, to achieve 360° omnidirectional detection coverage, a network of three to four planar phased arrays is often required. Therefore, active phased arrays struggle to achieve both performance and cost advantages. Summary of the Invention

[0004] To solve the problems existing in the prior art, the present invention proposes a low-cost sub-array digital cylindrical active phased array, comprising N analog active linear arrays, M 1-cut N / M-way radio frequency switches, an M-channel digital transceiver module, a beam control module and a power supply module; wherein N, M and N / M are all integers; the N analog active linear arrays are installed on an array skeleton to form a cylindrical array, and the radio frequency path of each linear array is connected to the branch port of the M 1-cut N / M-way radio frequency switches; the main port of the M 1-cut N / M-way radio frequency switches is connected to the M-channel digital transceiver module, and the beam control module and the power supply module provide power supply control and control power supply for the analog active linear arrays and the radio frequency switches.

[0005] Furthermore, the N analog active linear arrays are arranged in a vertical circle and fixed on the linear array mounting frame to form a cylindrical cylindrical active array, and M 1-cut N / M-way RF switches, M-channel digital transceiver modules, beam control modules and power supply modules are integrated or separately installed inside the integrated equipment chassis.

[0006] Furthermore, the radio frequency paths of the N simulated active linear arrays are connected to the M 1-cut N / M radio frequency switches in the following manner: the branch ports 1 of the M 1-cut N / M radio frequency switches are respectively connected to the 1st to Mth simulated active linear arrays, the branch ports 2 of the M 1-cut N / M radio frequency switches are respectively connected to the (1+M)th to (M+M)th simulated active linear arrays, and so on. The branch ports N / M of the M 1-cut N / M radio frequency switches are respectively connected to the (1+M*(N / M-1))th to (M+M*(N / M-1))th simulated active linear arrays.

[0007] Furthermore, the analog active linear array includes a high- and low-frequency mixed active circuit, an antenna unit, a telecommunications mixed interface and a shell; the active RF transceiver of the high- and low-frequency mixed active circuit is realized by a T / R chip, which is a highly integrated RF active circuit. Each T / R chip integrates a digitally controlled analog phase shifter and attenuator, a receiving low-noise amplifier, a transmitting power amplifier, and a transceiver switching switch; the T / R chip and the antenna unit realize RF transceiver interconnection by welding glass beads, without other interconnecting cables and connectors.

[0008] Furthermore, the telecommunications hybrid interface includes an RF connector and a low-frequency connector. The RF connector is interconnected with an M-channel digital transceiver module via an RF cable and M 1-cut N / M-way RF switches. The low-frequency connector is interconnected with a beam control module and a power supply module via a low-frequency cable.

[0009] Furthermore, the M analog active linear arrays 1 and the M-channel digital transceiver modules are switched on in real time through M 1-to-N / M-way radio frequency switches for transmission and reception.

[0010] Furthermore, by combining azimuth RF switch beam switching, azimuth digital domain transmit and receive beam scanning, and elevation analog active linear array analog phase shifter beam scanning, a single set of active phased array full-space beam scanning coverage is achieved, with sum-difference amplitude ratio angle measurement adopted in azimuth and sum-sum amplitude ratio angle measurement adopted in elevation.

[0011] Compared with the prior art, the present invention has the following technical effects:

[0012] (1) The active phased array proposed in the present invention eliminates the interconnection cables and connectors connecting the active transceiver channel and the antenna unit, thereby reducing costs. At the same time, the interconnection loss is reduced, the noise coefficient of the active phased array is reduced, and the radar power is improved. The introduction of radio frequency switches to realize azimuth beam scanning switching also greatly reduces the channel size of digital transceiver and other equipment, further reducing costs.

[0013] (2) The active phased array proposed in the present invention combines RF switch beam switching, digital domain beam scanning and analog phase shifter beam scanning to achieve full spatial domain beam scanning coverage with a single set of active phased array.

[0014] (2) The active phased array proposed in the present invention has good consistency in beam width and gain during azimuth scanning, which can improve the accuracy and power consistency of the radar at different detection angles; at the same time, the azimuth transceiver unit level is digitized, which retains the anti-interference capability of the digital active phased array. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the system architecture of an embodiment of the present invention.

[0016] Figure 2Schematic diagram of a multi-channel highly integrated analog active line array architecture according to an embodiment of the present invention.

[0017] Figure 3 FIG. 4 is a partial schematic diagram of a cylindrical active phased array according to an embodiment of the present invention.

[0018] Figure 4 Schematic diagram of a multi-channel highly integrated analog active linear array according to an embodiment of the present invention.

[0019] Figure 5 The analog active linear array of the embodiment of the present invention is connected to the radio frequency switch in groups.

[0020] Figure 6 azimuth and directional diagram of an embodiment of the present invention.

[0021] Figure 7 This is the azimuth difference pattern of an embodiment of the present invention.

[0022] Figure 8 2 is the elevation direction diagram of an embodiment of the present invention.

[0023] Figure 9 This is a 40° pitch scanning directional diagram of an embodiment of the present invention.

[0024] The reference numerals in the figures specifically indicate:

[0025] Analog active linear array 1, high and low frequency mixed active circuit 11, antenna unit 12, telecommunications mixed interface 13, shell 14, integrated equipment chassis 2, linear array installation frame 3. DETAILED DESCRIPTION

[0026] The embodiments of the present application propose a low-cost sub-array digital cylindrical active phased array, which reduces the cost of the radar system and improves the performance from the architectural level.

[0027] In order to help those skilled in the art better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 those skilled in the art without creative work are within the scope of protection of this application.

[0028] See also Figure 1 , a schematic structural diagram of a low-cost sub-array digital cylindrical active phased array in an embodiment of the present application, comprising:

[0029] N analog active linear arrays 1, M 1-to-N / M (N, M, N / M are all positive integers) RF switches, M-channel digital transceiver modules, beam control modules and power supply modules.

[0030] The radio frequency paths of the N simulated active linear arrays 1 are connected to the branch ports of M 1-to-N / M (N / M is an integer) radio frequency switches. Specifically, the branch ports 1 of the M radio frequency switches are respectively connected to the 1st to Mth simulated active linear arrays 1, and the branch ports 2 of the M radio frequency switches are respectively connected to the (1+M)th to (M+M)th simulated active linear arrays 1. And so on, the branch ports N / M of the M radio frequency switches are respectively connected to the (1+M*(N / M-1))th to (M+M*(N / M-1))th simulated active linear arrays 1.

[0031] The M-channel digital transceiver module, M 1-to-N / M paths 21, beam control module and power supply module are all installed in the integrated equipment chassis 2, and the high and low frequency signals are interconnected with the N analog active line arrays 1 through the panel interface and cables at the bottom of the integrated equipment chassis 2. Figure 3 shown.

[0032] The main ports of M 1-cut N / M-way RF switches are connected to M-channel digital transceiver modules respectively. Figure 1 As shown, the transmitting and receiving unit level digitization is formed.

[0033] The control and power supply of the analog active linear array 1 and the control and power supply of the RF switch are provided by the beam control module and the power supply module. The M-channel digital transceiver module, beam control module and power supply module receive the control, clock and power supply signals of the radar system, such as Figure 1 shown.

[0034] N analog active line arrays 1 are installed on the integrated equipment chassis 2 through the line array installation frame 3. The appearance of the array is shown in the figure below. Figure 3 The N simulated active linear arrays 1 are arranged in a vertical circle to form a cylindrical array, which are numbered 1 to N in sequence.

[0035] The analog active linear array 1 is composed of a high- and low-frequency mixed active circuit 11, an antenna unit 12, a telecommunications mixed interface 13, a housing 14, etc. Figure 2 The high and low frequency mixed active circuit 11 includes a radio frequency circuit (including a TR chip), a control circuit, and a power supply circuit, etc., and is integrated with a PCB common board circuit. Figure 2 shown.

[0036] The active RF transceiver of the mixed high- and low-frequency active circuit 11 is implemented by a TR chip. This highly integrated RF active circuit integrates a digitally controlled analog phase shifter and attenuator, a receive low-noise amplifier, a transmit power amplifier, a transmit / receive switch, and other components, ensuring low power consumption and natural cooling. The TR chip and antenna unit 12 are interconnected by welding glass beads to achieve RF transceiver connectivity, eliminating the need for other interconnecting cables or connectors.

[0037] The telecommunications hybrid interface 13 includes one RF connector and one multi-core low-frequency connector. The RF connector is interconnected with the M-channel digital transceiver module through an RF cable and M 1-to-N / M-way splitters. The low-frequency connector is interconnected with the beam control module and the power supply module through a low-frequency cable.

[0038] The low-cost subarray digital cylindrical active phased array realizes time-sharing switching of N beams within 360° azimuth omnidirectionally through an RF switch. The azimuth beam interval is 360° / N. Each beam is formed by adjacent M (M < N) active linear arrays, and then digital domain continuous scanning is performed within the beam interval of 360° / N through the M-channel digital transceiver module, and finally full coverage of azimuth detection and beam shaping can be achieved.

[0039] This active phased array realizes continuous scanning and beam shaping of the transceiver beam in the elevation direction through the analog digital control attenuators and phase shifters in each channel of the analog active linear array 1.

[0040] In the azimuth direction, each working analog active linear array 1 is connected to the M-channel digital transceiver module, and a receiving sum pattern and a receiving difference pattern can be formed. In the azimuth direction, receiving sum-difference amplitude comparison angle measurement is used; in the elevation direction, only a receiving analog sum pattern is formed, and sum-sum amplitude comparison angle measurement with different wave positions is used.

[0041] The following is Application Example 1 of a low-cost subarray digital cylindrical active phased array provided by the embodiments of this application.

[0042] Application Example 1 of the low-cost subarray digital cylindrical active phased array consists of 48 8-channel analog active linear arrays 1, an integrated equipment chassis 2, and a linear array mounting skeleton 3. It has a diameter of 1000 mm and a height of about 640 mm. It operates in the S band with a center operating frequency of 3 GHz.

[0043] For the 8-channel analog active linear array 1 of Application Example 1, the transmission of RF, power, and control signals is realized through one high-low frequency hybrid connector. The integrated antenna unit 12 adopts a low-profile design and an independent housing, and the spacing between antenna units 12 is 75 mm.

[0044] When the analog active linear array 1 of Application Example 1 is installed on the linear array mounting skeleton 3 to form a cylindrical columnar active array, the adjacent two columns of analog active linear arrays 1 are offset by 37.5 mm vertically, which is 1 / 2 of the spacing between antenna units 12.

[0045] The integrated equipment chassis 2 of Application Example 1 contains one 12-channel digital transceiver module, two RF switch combinations (each containing 6 1-to-4 RF switches), a beam control module, and a power supply module (voltage stabilization and filtering), etc.

[0046] The devices in the analog active linear array 1 and the integrated equipment chassis 2 of Application Example 1 are all powered by DC28V.

[0047] The 12-channel digital transceiver module and beam control module of the first application example receive the control optical signal and 80MHz clock signal sent by the radar back-end system. The 12-channel digital transceiver module parses the control optical signal into a TTL control electrical signal for its own use. The beam control module parses the control optical signal into a differential control electrical signal and sends it to the analog active linear array 1 and the RF switch combination to realize beam scanning and shaping control. The 80MHz clock signal is used for transceiver mixing and synchronization.

[0048] The application example 1 uses 2 RF switches to combine a total of 12 1-to-4 RF switches to select the 12 adjacent analog active linear arrays 1 and 12-channel digital transceiver modules in real time for transmission and reception. The sliding window selection can realize azimuth beam switching. Figure 5 As shown in Figure 1, the first 1-for-4 RF switch connects to the 1st, 13th, 25th, and 37th analog active linear array lines 1. The second 1-for-4 RF switch connects to the 2nd, 14th, 26th, and 38th analog active linear array lines 1, and so on. Two 12-bit binary codes are used to control the gating of the twelve 1-for-4 RF switches. The control truth tables for the two RF switch combinations are shown in Tables 1 and 2.

[0049] Linear array\control bit D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 Linear Array 1 0 0 ／ ／ ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 13 0 1 ／ ／ ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 25 1 0 ／ ／ ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 37 1 1 ／ ／ ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 2 ／ ／ 0 0 ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 14 ／ ／ 0 1 ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 26 ／ ／ 1 0 ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 38 ／ ／ 1 1 ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 3 ／ ／ ／ ／ 0 0 ／ ／ ／ ／ ／ ／ Linear Array 15 ／ ／ ／ ／ 0 1 ／ ／ ／ ／ ／ ／ Linear Array 27 ／ ／ ／ ／ 1 0 ／ ／ ／ ／ ／ ／ Linear Array 39 ／ ／ ／ ／ 1 1 ／ ／ ／ ／ ／ ／ Linear Array 4 ／ ／ ／ ／ ／ ／ 0 0 ／ ／ ／ ／ Linear Array 16 ／ ／ ／ ／ ／ ／ 0 1 ／ ／ ／ ／ Linear Array 28 ／ ／ ／ ／ ／ ／ 1 0 ／ ／ ／ ／ Linear Array 40 ／ ／ ／ ／ ／ ／ 1 1 ／ ／ ／ ／ Linear Array 5 ／ ／ ／ ／ ／ ／ ／ ／ 0 0 ／ ／ Linear Array 17 ／ ／ ／ ／ ／ ／ ／ ／ 0 1 ／ ／ Linear Array 29 ／ ／ ／ ／ ／ ／ ／ ／ 1 0 ／ ／ Linear Array 41 ／ ／ ／ ／ ／ ／ ／ ／ 1 1 ／ ／ Linear Array 6 ／ ／ ／ ／ ／ ／ ／ ／ 0 0 Linear Array 18 ／ ／ ／ ／ ／ ／ ／ ／ 0 1 Linear Array 30 ／ ／ ／ ／ ／ ／ ／ ／ 1 0 Linear Array 42 ／ ／ ／ ／ ／ ／ ／ ／ 1 1

[0050] Table 1 Control relationship table of RF switch combination 1

[0051] Linear array\control bit D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 Linear Array 7 0 0 ／ ／ ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 19 0 1 ／ ／ ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 31 1 0 ／ ／ ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 43 1 1 ／ ／ ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 8 ／ ／ 0 0 ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 20 ／ ／ 0 1 ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 32 ／ ／ 1 0 ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 44 ／ ／ 1 1 ／ ／ ／ ／ ／ ／ ／ ／ Linear Array 9 ／ ／ ／ ／ 0 0 ／ ／ ／ ／ ／ ／ Linear Array 21 ／ ／ ／ ／ 0 1 ／ ／ ／ ／ ／ ／ Linear Array 33 ／ ／ ／ ／ 1 0 ／ ／ ／ ／ ／ ／ Linear Array 45 ／ ／ ／ ／ 1 1 ／ ／ ／ ／ ／ ／ Linear Array 10 ／ ／ ／ ／ ／ ／ 0 0 ／ ／ ／ ／ Linear Array 22 ／ ／ ／ ／ ／ ／ 0 1 ／ ／ ／ ／ Linear Array 34 ／ ／ ／ ／ ／ ／ 1 0 ／ ／ ／ ／ Linear Array 46 ／ ／ ／ ／ ／ ／ 1 1 ／ ／ ／ ／ Linear Array 11 ／ ／ ／ ／ ／ ／ ／ ／ 0 0 ／ ／ Linear Array 23 ／ ／ ／ ／ ／ ／ ／ ／ 0 1 ／ ／ Linear Array 35 ／ ／ ／ ／ ／ ／ ／ ／ 1 0 ／ ／ Linear Array 47 ／ ／ ／ ／ ／ ／ ／ ／ 1 1 ／ ／ Linear Array 12 ／ ／ ／ ／ ／ ／ ／ ／ ／ ／ 0 0 Linear Array 24 ／ ／ ／ ／ ／ ／ ／ ／ ／ ／ 0 1 Linear Array 36 ／ ／ ／ ／ ／ ／ ／ ／ ／ ／ 1 0 Linear Array 48 ／ ／ ／ ／ ／ ／ ／ ／ ／ ／ 1 1

[0052] Table 2 Control relationship table of RF switch combination 2

[0053] In the application example 1, the circular included angle between two adjacent analog active linear arrays 1 is 360° / 48=7.5°, which means that the jump of beam switching achieved by the RF switch in the azimuth direction is 7.5°, and continuous digital beam scanning is achieved within 7.5° through 12 digital transceiver channels, thereby achieving omnidirectional scanning in the azimuth direction.

[0054] The first application example performs pitch continuous beam scanning by simulating the analog phase shifters in each channel of the active linear array 1 .

[0055] The application example 1 adopts the sum-difference ratio angle measurement in azimuth and the sum-sum ratio angle measurement in elevation. Its azimuth sum-difference direction diagram is as follows: Figure 6 、 Figure 7 As shown, its pitch normal direction pattern and scanning 40° direction pattern are as follows Figure 8 、 Figure 9 shown.

[0056] This invention integrates active circuits with antenna elements (interconnected by welded glass beads) to form a multi-channel analog active linear array, eliminating the interconnecting cables and connectors between the active channels and antenna elements, thus reducing costs. Multiple analog active linear arrays are arranged in a vertical circular pattern to form a cylindrical array. Multiple single-pole, multi-throw RF switches interconnect all analog active linear arrays with a small number of digital transceiver channels, creating a digitized sub-array. This reduces the channel size of digital transceiver equipment and further reduces costs.

[0057] The present invention interconnects active circuits and antenna units through welding glass beads, which can effectively reduce the receiving noise coefficient of the active phased array and improve the radar detection power; at the same time, it combines RF switch beam switching, digital domain beam scanning and analog phase shifter beam scanning to achieve full airspace beam scanning coverage of a single set of active phased array.

[0058] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0059] It should be understood that in this application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0060] In the several embodiments provided in this application, it should be understood that the disclosed systems and devices can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0061] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0062] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0063] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (English full name: Read-Only Memory, English abbreviation: ROM), random access memory (English full name: Random Access Memory, English abbreviation: RAM), disk or optical disk and other media that can store program code.

[0064] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A low-cost sub-array digital cylindrical active phased array, characterized by: The invention comprises N analog active linear arrays, M 1-cut N / M-way radio frequency switches, M-channel digital transceiver modules, a beam control module and a power supply module; wherein N, M and N / M are all positive integers; the N analog active linear arrays are installed on the array skeleton to form a cylindrical array, and the radio frequency path of each linear array is connected to the branch port of the M 1-cut N / M-way radio frequency switches; the main port of the M 1-cut N / M-way radio frequency switches is connected to the M-channel digital transceiver module; the beam control module and the power supply module provide control and power supply for the analog active linear array and the radio frequency switch; the analog active linear array (1) It includes a high- and low-frequency mixed active circuit (11), an antenna unit (12), a telecommunications mixed interface (13) and a housing (14); the active radio frequency transceiver of the high- and low-frequency mixed active circuit (11) is realized by a T / R chip, which is a highly integrated radio frequency active circuit. Each T / R chip integrates a digitally controlled analog phase shifter and attenuator, a receiving low-noise amplifier, a transmitting power amplifier, and a transceiver switching switch; the T / R chip and the antenna unit (12) are interconnected by welding glass beads to realize radio frequency transceiver, without other interconnecting cables and connectors.

2. The low-cost sub-array digital cylindrical active phased array according to claim 1, characterized in that: The N analog active linear arrays (1) are arranged in a vertical circle and fixed on a linear array mounting frame (3) to form a cylindrical active array. M 1-cut N / M-way radio frequency switches, M-channel digital transceiver modules, beam control modules and power supply modules are integrated or separately installed inside an integrated equipment chassis (2).

3. The low-cost sub-array digital cylindrical active phased array according to claim 2, characterized in that: The radio frequency paths of the N simulated active linear arrays (1) are connected to the branch ports of M 1-cut N / M-path radio frequency switches, specifically: the branch ports 1 of the M 1-cut N / M-path radio frequency switches are respectively connected to the 1st to Mth simulated active linear arrays (1), the branch ports 2 of the M 1-cut N / M-path radio frequency switches are respectively connected to the 1+Mth to M+Mth simulated active linear arrays (1), and so on, the branch ports N / M of the M 1-cut N / M-path radio frequency switches are respectively connected to the 1+M*(N / M-1)th to M+M*(N / M-1)th simulated active linear arrays (1).

4. The low-cost sub-array digital cylindrical active phased array according to claim 1, characterized in that: The telecommunication mixed interface (13) comprises a radio frequency connector and a low frequency connector. The radio frequency connector is interconnected with an M-channel digital transceiver module via a radio frequency cable, M 1-cut N / M radio frequency switches, and the low frequency connector is interconnected with a beam control module and a power supply module via a low frequency cable.

5. The low-cost sub-array digital cylindrical active phased array according to claim 4, characterized in that: M analog active linear arrays (1) and M-channel digital transceiver modules are switched on in real time through M 1-to-N / M-way radio frequency switches for transmission and reception.

6. The low-cost sub-array digital cylindrical active phased array according to claim 5, characterized in that: The low-cost sub-array digital cylindrical active phased array realizes omnidirectional beam scanning coverage and angle measurement, specifically: combining azimuth RF switch beam switching, azimuth digital domain transceiver beam scanning and elevation analog active linear array (1) analog phase shifter beam scanning to achieve full spatial domain beam scanning coverage of a single set of active phased array, using sum-difference amplitude ratio angle measurement in azimuth and sum-sum amplitude ratio angle measurement in elevation.

Images