A three-frequency-in-one transceiver assembly for meteorological phased array radar

Abstract

The present invention discloses a three-frequency-in-one transceiver assembly for a meteorological phased array radar, and specifically relates to the technical field of meteorological radars, including a phased array antenna substrate, wherein the upper end surface of the phased array antenna substrate is provided with a plurality of TR structures. The present invention realizes L-band wind profile detection and transceiver, L-band meteorological satellite reception, and C-band meteorological satellite reception through multi-layer cavity division and same-frequency common cavity design, and the overall component size envelope is nearly within 10 cubic centimeters, and each functional cavity design is very reasonable, and the passive network cavity takes into account the resonant natural frequency, and the active circuit cavity takes into account shielding, heat dissipation and other functions. In order to meet the requirements of easy maintenance in the later stage, it is designed as an overall modular design, and all device binding data are stored in an internal calibration data storage chip. If a module needs to be replaced in the later stage due to a fault, it can be directly replaced and automatically matched without recalibrating and calibrating the entire radar system.

Description

Technical Field

[0001] The present invention relates to the technical field of meteorological radars, and in particular to a three-frequency-in-one transceiver assembly for a meteorological phased array radar. Background Art

[0002] In the field of meteorological monitoring, as the requirements for the accuracy and range of meteorological information acquisition continue to increase, meteorological phased array radars are playing an increasingly important role. Traditional meteorological radars often use single-frequency or dual-frequency working modes, and have problems such as single function and limited detection information. Early meteorological radars focused on the detection of precipitation particles in a single frequency band, making it difficult to fully and meticulously grasp the multi-dimensional characteristics of meteorological elements.

[0003] Although the current antenna is an integrated, modular design and adopts a three-in-one shared interface, in terms of circuit design, the supporting transceiver components need to fully integrate multiple frequency band functional boards in the same cavity component, which poses high difficulties in circuit design, structural design, electromagnetic shielding design, and anti-interference design.

[0004] Secondly, because the antenna adopts a co-aperture design, the distance between antennas in the same frequency band is relatively close, and all frequency bands are required to work synchronously in duplex mode according to the application scenario. If the design is improper, the transmitting channel will generate coupled signals that have strong interference with the receiving channel, and may even block the receiving channel or cause overload and damage to the receiving channel devices. For such problems, it is necessary to consider the limiting, filtering, time domain, structure and other aspects of the design, which is difficult to design. Therefore, in order to meet the many characteristics of warship meteorological equipment such as integration, miniaturization, low power consumption, strong weather resistance, and easy maintenance, a three-frequency-in-one meteorological phased array dedicated transceiver component for shipboard meteorological phased array systems is proposed. Summary of the invention

[0005] The object of the present invention is to provide a three-frequency-in-one transceiver assembly for a meteorological phased array radar to solve the above-mentioned deficiencies in the technology.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a three-frequency-in-one transceiver component for a meteorological phased array radar, comprising a phased array antenna substrate, wherein the upper end surface of the phased array antenna substrate is provided with a plurality of TR structures, wherein the TR structure comprises an L-band TR component, a dielectric substrate, a C-band synthesis network and a band receiving component, wherein the dielectric substrate is made of polytetrafluoroethylene material, and the phased array antenna is shared by both transmission and reception. During transmission, the radio frequency signal from the signal source is transmitted to the corresponding array units of the antenna via a power divider, a phase shift network and a circulator, and radiated into space. Through phase scanning, beams in five directions of east, west, south, north and center are generated in sequence. When each beam transmits a signal, the atmospheric echo signal formed is received by the radiating element in the corresponding time window, and the received signal enters the receiver via a circulator, a transceiver switch, a low noise amplifier, a phase shift network and a combiner;

[0007] Preferably, the dielectric substrate is arranged between the L-band TR component and the C-band synthesis network, the C-band synthesis network is arranged between the band receiving component and the L-band TR component, a TR radio frequency board is arranged between the L-band TR component and the dielectric substrate, and a filter is connected to the end of the C-band synthesis network away from the dielectric substrate.

[0008] Specifically, in the band receiving component, the wind profile emission is suppressed by the filter with a suppression degree of 35dB. According to actual engineering experience, the spatial loss is calculated to be 30dB. Since the limiting power of the L-band receiving channel is 10dBm, the power level of the wind profile transmission signal entering the L-band receiving channel is 10-35=-25dBm<receiving input P-1:-1dBm, so the link will not be saturated. Since other stray signals, harmonics and other signals are smaller than the transmission signal power, they will not affect the link. In addition, the dielectric substrate plays a role of physical isolation between the C-band synthesis network and the TR radio frequency board to prevent electromagnetic interference and short circuit between the two. At the same time, it provides stable support for the two, ensuring that they can maintain a stable relative position in different working environments and ensure the reliability of signal transmission.

[0009] Preferably, the band receiving component includes a shell arranged at one end of the C-band synthesis network, and a receiving radio frequency PCB is arranged inside the shell.

[0010] Preferably, a spacer is provided at one end of the receiving RF PCB away from the housing, and the spacer is provided between the receiving RF PCB and the filter. The spacer plays a role of isolation and support to ensure the stability of internal components.

[0011] Preferably, a control board is provided on a side of the shell away from the receiving radio frequency PCB, and the control board is connected to the receiving radio frequency PCB via a connecting line. The receiving radio frequency PCB is responsible for receiving and transmitting frequency processing of L band and C band.

[0012] Preferably, an L-band transmitting input end is connected to a groove opened on one side of the outer wall of the L-band TR component, and an L-band receiving output end is provided on one side of the L-band transmitting input end.

[0013] Preferably, a C-band receiving input end is connected to a groove opened on one side of the outer wall of the C-band synthetic network, a C-band receiving output end is provided on one side of the C-band receiving input end, and the C-band receiving output end and the C-band receiving input end are arranged at the lower end of the L-band transmitting input end and the L-band receiving output end.

[0014] Through the above technical solution:

[0015] It uses a multi-layer cavity and a same-frequency common cavity design, and the overall component size envelope is close to cubic centimeters, realizing L-band wind profile detection and reception, L-band meteorological satellite reception, and C-band meteorological satellite reception. For the passive network cavity, the resonant natural frequency is taken into account, and for the active circuit cavity, shielding, heat dissipation and other functions are taken into account. It is an overall modular design, and all device binding data are stored in the internal calibration data storage chip. If a module needs to be replaced in the future due to a fault, it can be replaced directly and automatically matched without the need to recalibrate and calibrate the entire radar system.

[0016] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0017] 1. Through multi-layer cavity division and same-frequency common cavity design, the overall component size envelope is close to 10 cubic centimeters, realizing L-band wind profile detection and reception, L-band meteorological satellite reception, and C-band meteorological satellite reception. The design of each functional cavity is very reasonable. For the passive network cavity, the resonant natural frequency is taken into account. For the active circuit cavity, shielding, heat dissipation and other functions are taken into account. In order to meet the requirements of easy maintenance in the later stage, it is designed as an overall modular design, and all device binding data are stored in the internal calibration data storage chip. If a fault occurs in the later stage and the module needs to be replaced, it can be directly replaced and automatically matched without the need to recalibrate and calibrate the entire radar system.

[0018] 2. The functions that can be realized by the present invention are composed of L-band wind profile radar transmission and reception, L-band meteorological reception, and C-band meteorological reception. It has the L-band wind profile radar detection function, the function of receiving the L-band right-hand circularly polarized signal of the Fengyun-4 satellite, the ability to receive the right-hand circularly polarized signal of the L-band polar-orbiting meteorological satellite, and the ability to receive the horizontal / vertical linear polarization signal of the C-band broadcast satellite. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the TR structure appearance of the present invention;

[0021] Figure 2 It is a schematic diagram of a phased array of multiple TR structures of the present invention;

[0022] Figure 3 It is an exploded schematic diagram of the TR structure of the present invention;

[0023] Figure 4 This is an internal principle block diagram of the present invention.

[0024] Description of reference numerals:

[0025] 1. Phased array antenna substrate; 2. TR structure; 21. L-band TR component; 211. L-band transmitting input; 212. L-band receiving output; 22. Dielectric substrate; 23. C-band synthesis network; 231. C-band receiving input; 232. C-band receiving output; 24. Band receiving component; 241. Shell; 242. Receiving RF PCB; 3. TR RF board; 4. Filter; 5. Spacer; 6. Control board. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] The present invention provides Figure 1-Figure 4 A three-frequency-in-one transceiver assembly for a meteorological phased array radar is shown, comprising:

[0028] Phased array antenna substrate 1, the upper end surface of the phased array antenna substrate 1 is provided with multiple TR structures 2, TR structure 2 includes L-band TR component 21, dielectric substrate 22, C-band synthesis network 23 and band receiving component 24, the dielectric substrate 22 is made of polytetrafluoroethylene material, the phased array antenna is shared by both transmission and reception, when transmitting, the radio frequency signal from the signal source is transmitted to the corresponding array units of the antenna through the power splitter, phase shift network, and circulator, and radiated into space, and through phase scanning, beams in five directions of east, west, south, north and center are generated in sequence. When each beam transmits a signal, the atmospheric echo signal formed is received by the radiating element in the corresponding time window, and the received signal enters the receiver through the circulator, transceiver switch, low noise amplifier, phase shift network, and combiner;

[0029] The dielectric substrate 22 is arranged between the L-band TR component 21 and the C-band synthesis network 23, the C-band synthesis network 23 is arranged between the band receiving component 24 and the L-band TR component 21, a TR radio frequency board 3 is arranged between the L-band TR component 21 and the dielectric substrate 22, and a filter 4 is connected to the end of the C-band synthesis network 23 away from the dielectric substrate 22.

[0030] Specifically, in the band receiving component 24, the wind profile emission is suppressed by the filter 4 with a suppression degree of 35dB. According to actual engineering experience, the spatial loss is calculated to be 30dB. Since the limiting power of the L-band receiving channel is 10dBm, the power level of the wind profile transmission signal entering the L-band receiving channel is 10-35=-25dBm<receiving input P-1:-1dBm, so the link will not be saturated. Since other stray signals, harmonics and other signals are smaller than the transmission signal power, they will not affect the link. The dielectric substrate 22 plays a role of physical isolation between the C-band synthesis network 23 and the TR radio frequency board 3 to prevent electromagnetic interference and short circuit between the two. At the same time, it provides stable support for the two to ensure that they can maintain a stable relative position under different working environments and ensure the reliability of signal transmission.

[0031] Further, see Figure 3 As shown, the band receiving component 24 includes a housing 241 disposed at one end of the C-band synthesis network 23 , and a receiving radio frequency PCB 242 is disposed inside the housing 241 .

[0032] A spacer bar 5 is provided at one end of the receiving RF PCB 242 away from the housing 241 . The spacer bar 5 is provided between the receiving RF PCB 242 and the filter 4 . The spacer bar 5 plays a role of isolation and support to ensure the stability of the internal components.

[0033] A control board 6 is provided on one side of the housing 241 away from the receiving RF PCB 242 . The control board 6 is connected to the receiving RF PCB 242 via a connecting line. The receiving RF PCB 242 is responsible for receiving and transmitting frequency processing of the L band and the C band.

[0034] Further, see Figure 1 and Figure 3 As shown, an L-band transmitting input end 211 is connected to a groove opened on one side of the outer wall of the L-band TR component 21 , and an L-band receiving output end 212 is provided on one side of the L-band transmitting input end 211 .

[0035] A C-band receiving input terminal 231 is connected to a groove on one side of the outer wall of the C-band synthesis network 23. A C-band receiving output terminal 232 is provided on one side of the C-band receiving input terminal 231. The C-band receiving output terminal 232 and the C-band receiving input terminal 231 are provided at the lower ends of the L-band transmitting input terminal 211 and the L-band receiving output terminal 212.

[0036] Through the above technical solution:

[0037] It uses a multi-layer cavity and a same-frequency common cavity design, and the overall component size envelope is within 10 cubic centimeters, realizing L-band wind profile detection and reception, L-band meteorological satellite reception, and C-band meteorological satellite reception. For the passive network cavity, it takes into account the resonant natural frequency, and for the active circuit cavity, it takes into account shielding, heat dissipation and other functions. It is an overall modular design, and all device binding data are stored in the internal calibration data storage chip. If a module needs to be replaced in the future due to a fault, it can be replaced directly and automatically matched without the need to recalibrate and calibrate the entire radar system.

[0038] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A three-frequency-in-one transceiver assembly for a meteorological phased array radar, characterized in that: include: A phased array antenna substrate (1), wherein the upper end surface of the phased array antenna substrate (1) is provided with a plurality of TR structures (2), wherein the TR structure (2) comprises an L-band TR component (21), a dielectric substrate (22), a C-band synthesis network (23) and a band receiving component (24); The dielectric substrate (22) is arranged between the L-band TR component (21) and the C-band synthesis network (23); the C-band synthesis network (23) is arranged between the band receiving component (24) and the L-band TR component (21); a TR radio frequency board (3) is arranged between the L-band TR component (21) and the dielectric substrate (22); and a filter (4) is connected to one end of the C-band synthesis network (23) away from the dielectric substrate (22).

2. The three-frequency-in-one transceiver assembly for a meteorological phased array radar according to claim 1, characterized in that: An L-band transmitting input end (211) is connected to a groove formed on one side of the outer wall of the L-band TR component (21), and an L-band receiving output end (212) is provided on one side of the L-band transmitting input end (211).

3. The three-frequency-in-one transceiver assembly for a meteorological phased array radar according to claim 2, characterized in that: A C-band receiving input end (231) is connected to a groove formed on one side of an outer wall of the C-band synthesis network (23); a C-band receiving output end (232) is provided on one side of the C-band receiving input end (231); and the C-band receiving output end (232) and the C-band receiving input end (231) are provided at the lower ends of the L-band transmitting input end (211) and the L-band receiving output end (212).

4. The three-frequency-in-one transceiver assembly for a meteorological phased array radar according to claim 1, characterized in that: The band receiving component (24) comprises a housing (241) arranged at one end of the C-band synthesis network (23), and a receiving radio frequency PCB (242) is arranged inside the housing (241).

5. The three-frequency-in-one transceiver assembly for a meteorological phased array radar according to claim 4, characterized in that: A spacer bar (5) is provided at one end of the receiving radio frequency PCB (242) away from the housing (241), and the spacer bar (5) is provided between the receiving radio frequency PCB (242) and the filter (4).

6. The three-frequency-in-one transceiver assembly for a meteorological phased array radar according to claim 5, characterized in that: A control board (6) is provided on a side of the housing (241) away from the receiving radio frequency PCB (242), and the control board (6) is connected to the receiving radio frequency PCB (242) via a connecting line.

7. The three-frequency-in-one transceiver assembly for a meteorological phased array radar according to claim 1, characterized in that: The dielectric substrate (22) is made of polytetrafluoroethylene material.

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