KR102418507B1 - Dc-dc power module for aesa antenna with small size, light weight, high efficiency and high voltage characteristics - Google Patents

Abstract

The present embodiments provide a high-voltage bus converter, a buck regulator including a current limiting circuit, a switching circuit, and an AESA (Active Electronically Scanned Array) radar and transmission/reception module group to which a DC-DC power module designed with a high-capacity charging capacitor bank is applied. do.

Description

DC-DC POWER MODULE FOR AESA ANTENNA WITH SMALL SIZE, LIGHT WEIGHT, HIGH EFFICIENCY AND HIGH VOLTAGE CHARACTERISTICS}

The technical field to which the present invention pertains relates to a DC-DC power module of an AESA radar and a transmission/reception module group.

The content described in this section merely provides background information for the present embodiment and does not constitute the prior art.

When designing an Active Electronically Scanned Array (AESA) antenna, the radiating aperture, beamforming/controlling, DC distribution circuitry and electrical/mechanical interfaces must be considered. The AESA radar platform is limited in size, weight, power, and heat generation (SWaP-C: Size, Weight and Power, Cooling). In particular, the AESA radar operating on four sides requires power consumption of several MW or more. Although the acquisition cost of an AESA antenna is primarily determined by the TR module, the cost of the Line Replaceable Unit (LRU) assembly and DC-DC power module also accounts for a significant portion. The power system of the AESA radar should be designed with a structure to improve energy efficiency and reduce losses up to the TR (Transmit Receive) module. That is, it is the power that directly affects the radar operation, and a stable and reliable power supply is required.

Korean Patent Publication No. 10-1647568 (2016.08.04)

Embodiments of the present invention are designed with a high voltage bus converter, a buck regulator including a current limiting circuit, a switching circuit, and a high-capacity charging capacitor bank to make the DC-DC power module of the AESA antenna smaller and lighter, and operate with high efficiency, and transmit/receive module (TR module) The main purpose is to make the entire system compact, lightweight and highly efficient by being integrated with the group body.

Other objects not specified in the present invention may be additionally considered within the scope that can be easily inferred from the following detailed description and effects thereof.

According to one aspect of this embodiment, in the transmission/reception module group of the AESA (Active Electronically Scanned Array) radar, a DC-DC converter for converting an input DC voltage into an output DC voltage, is connected to the DC-DC converter and includes a resonance circuit a plurality of buck regulators for controlling a voltage using A plurality of transmit/receive modules each connected to a plurality of capacitor banks and including transmit amplifiers for amplifying the electrical signal, and the DC-DC converter, the plurality of buck regulators, the plurality of switches, and the plurality of capacitor banks are connected to , and a control module for controlling the plurality of switches.

According to another aspect of this embodiment, in the AESA (Active Electronically Scanned Array) radar, it includes a plurality of radiation elements that radiate electromagnetic waves, and a transmit/receive module group connected to the plurality of radiation elements, the transmit/receive module group body is a DC-DC converter that converts an input DC voltage into an output DC voltage, a plurality of buck regulators connected to the DC-DC converter and controlling the voltage using a resonance circuit, and a signal path connected to the plurality of buck regulators, respectively A plurality of transmit and receive switches comprising a plurality of switches for connecting or blocking, a plurality of capacitor banks respectively connected to the plurality of switches for storing electrical signals, and transmission amplifiers respectively connected to the plurality of capacitor banks and amplifying the electrical signals It provides an AESA radar comprising a module, and a control module connected to the DC-DC converter, the plurality of buck regulators, the plurality of switches, and the plurality of capacitor banks, and controlling the plurality of switches. .

As described above, according to the embodiments of the present invention, the DC-DC power module of the AESA antenna is transmitted/received by designing the high-voltage bus converter, the buck regulator including the current limiting circuit, the switching circuit, and the high-capacity charging capacitor bank. It has the effect of making the AESA antenna system compact and lightweight by implementing it as an integrated body into the body and operating it with high efficiency.

Even if it is an effect not explicitly mentioned herein, the effects described in the following specification expected by the technical features of the present invention and their potential effects are treated as if they were described in the specification of the present invention.

1 is a diagram illustrating an AESA radar system according to an embodiment of the present invention.
2 is a diagram illustrating a distributed DC distribution system of an AESA antenna.
3 is a diagram illustrating a distributed DC-DC power supply module to which a low voltage of 300 Vdc is input from an AESA antenna.
4 is a diagram illustrating a centralized DC distribution system of an AESA antenna.
5 is a diagram illustrating a centralized DC-DC power supply module to which a low voltage of 300 Vdc is input from the AESA antenna.
6 is a block diagram illustrating a transmission/reception module group according to another embodiment of the present invention.
7 and 8 are diagrams illustrating a DC-DC power supply module according to another embodiment of the present invention.
9 is a diagram illustrating a DC-DC power module to which a high voltage of 800 Vdc is input from the AESA antenna according to another embodiment of the present invention.
10 to 12 are diagrams illustrating a connection structure of a transmission/reception module group according to another embodiment of the present invention.
13 is a diagram illustrating a buck regulator of a DC-DC power supply module according to another embodiment of the present invention.
14 is a diagram illustrating an operation principle of a buck regulator of a DC-DC power supply module according to another embodiment of the present invention.
15A is a flowchart illustrating an operation of a buck regulator of a DC-DC power supply module according to another embodiment of the present invention, and FIG. 15B is a buck regulator and a buck boost converter of a DC-DC power supply module according to another embodiment of the present invention. It is a flowchart illustrating the operation of the mixed structure.
16 is a diagram illustrating a buck regulator and a charge capacitor bank circuit of a DC-DC power supply module according to another embodiment of the present invention.
17 is a diagram illustrating a result of a charging voltage/current waveform according to a simulation performed for a buck regulator and a charging capacitor bank circuit of a DC-DC power supply module according to another embodiment of the present invention.
18 is an enlarged view of voltage waveforms according to simulations performed with respect to a buck regulator and a charge capacitor bank circuit of a DC-DC power supply module according to another embodiment of the present invention.
19 is a diagram illustrating charging/discharging results for a buck regulator and a charging capacitor bank circuit of a DC-DC power supply module according to another embodiment of the present invention.
20 is a diagram illustrating a connection diagram of a DC-DC power module and a pulsed GaN-type HPA interworking test of a DC-DC power module according to another embodiment of the present invention.
21 is a diagram illustrating a test result of a DC-DC power module and a pulsed GaN type HPA interworking test of a DC-DC power module according to another embodiment of the present invention.

Hereinafter, in the description of the present invention, if it is determined that the subject matter of the present invention may be unnecessarily obscure as it is obvious to those skilled in the art with respect to related known functions, the detailed description thereof will be omitted, and some embodiments of the present invention will be described. It will be described in detail with reference to exemplary drawings.

In order to overcome SWaP-C limitations, the present invention applies a bus converter (Step down converter) having high efficiency at high voltage (800 Vdc or higher), and ② fast charging/ It has high-efficiency and high-voltage characteristics through the application of a discharge buck regulator and the configuration of a high-capacity charging capacitor bank stage for realizing a long transmission pulse width for long-distance detection and a transmission on/off switch. In addition, we propose a DC-DC power module structure for AESA with a low-cost, small-sized, lightweight, low-loss, low-heat, TR module group (2 to 16) and integrated modularization.

1 is a diagram illustrating an AESA radar system according to an embodiment of the present invention.

Referring to the DC power distribution system structure of a large AESA (or active phased array) radar, the AESA or active phased array system consists of a radiating element, a radome, an antenna structure, and multiple transmit/receive (T/R) aperture components of a transmit/receive antenna. ) module, control circuit, DC-DC circuit, RF beamformer, DC splitter, signal/control splitter and beam steering control devices. The AC-to-DC converter converts AC power to DC power that is fed to the radar antenna array.

In FIG. 1, ① is a radome, ② is an antenna structure, ③ is a radiation device, ④ is a plurality of TR modules, control circuits, DC-DC circuits, and ⑤ is a beam former, DC-DC splitter, signal/control splitter , ⑥ is a beam steering/control device, and ⑦ is an AC-DC converter.

The existing method applies a low voltage of 300 Vdc to a regulated converter with low efficiency (93%) characteristics and uses a distributed or centralized DC power distribution system through a linear regulator. There is no SWaP-C margin of the system due to the additional heat. Since the conventional method uses a 300 Vdc regulated converter, many DC-DC converters are needed with low efficiency to supply the power consumption required for a unit TR module group (2 to 16), so the size, weight, and The margin of power consumption and heat generation is insufficient. In addition, since the inrush current limiting circuit is taken as a function of the DC-DC converter for each TR module due to the high-capacity charging capacitor, the reliability is lowered, and the occurrence of failure increases because the inrush current protection circuit must be implemented at high voltage/high current.

In the existing method, the DC-DC converter method and the DC distribution system have a decrease in reliability due to an increase in size, weight, power and heat generation and frequent failure, so there is a limit to the AESA structure. In addition, when realizing several MW of power due to the characteristics of a regulated converter with low efficiency and low output capacity, SWaP-C (Size: Size, Weight: Weight, and Power: Power, - Cooling: Heat) increase in size, weight, and power due to lack of margin. There is a limitation that not only increases the increased calorific value, but also increases the price.

2 is a diagram illustrating a distributed DC distribution system of an AESA antenna, and FIG. 3 is a diagram illustrating a distributed DC-DC power supply module to which a low voltage of 300 Vdc is input from the AESA antenna.

Referring to FIG. 2 , in the DC power distribution system of an AESA or active phased array antenna, DC power is typically delivered to a converter using a 300 Vdc voltage bus. In the current powered active phased array antenna system, the AC-DC converter voltage of the distributed power distribution system is typically implemented as 270 Vdc or 300 Vdc and is input to the DC-DC conversion module (②) through the high voltage DC bus (①). . In particular, a high voltage DC bus can be implemented with a low current.

In a distributed structure, a single DC-DC conversion module is integrated with a small group of T/R modules (2 to 16) and distributed throughout the array. A DC power distribution system with a distributed architecture simplifies the electrical/mechanical interface. However, additional space is required for the DC-DC conversion module included in the group unit T/R module.

In FIG. 3, ① is a conventional low-efficiency low-voltage distributed regulated DC-DC converter (input voltage 300Vdc, efficiency 93%, output 500W), ② is a linear regulator (heat loss is generated as much as input/output voltage difference), and ③ is Transmission Enable On/ Off switch and energy charging capacitor bank, ④ is N TR modules.

Referring to FIG. 3, in the existing low-voltage, low-efficiency DC-DC power module structure, the existing DC-DC conversion module (①) of the distributed structure is included in the T/R module group unit to simplify the external interface, but DC-DC conversion The volume and weight occupied by the module will increase.

4 is a diagram illustrating a centralized DC distribution system of an AESA antenna, and FIG. 5 is a diagram illustrating a centralized DC-DC power supply module to which a low voltage of 300 Vdc is input from the AESA antenna.

Referring to FIG. 4, in the centralized system, 270 Vdc or 300 Vdc power converted from AC power to AC-DC is input to the DC-DC conversion module (②) through the high voltage DC bus (①), and low voltage DC The power required from the T/R module is input through the bus (③). The centralized power distribution system is implemented with a low-voltage, high-current DC bus. In addition, the centralized type separates the T/R module and the DC-DC conversion module to generate all the power needed for the T/R module, and supplies a lot of power needed for each module, making the interface complicated. Active phased array antenna design is determined through the electrical/mechanical interface of key sub-components and SWaP-C trade-off design.

In FIG. 5, ① is a conventional low-efficiency low-voltage concentrated regulated DC-DC converter (input voltage 300Vdc, efficiency 93%, number of outputs kW), ② is a linear regulator (heat loss is generated as much as input/output voltage difference), and ③ is transmission Enable On /Off switch and energy charging capacitor bank, ④ is N TR modules.

Referring to FIG. 5 , the existing centralized DC-DC conversion module (①) is located outside the T/R module group, the interface is complicated, and the volume and weight of the T/R module group unit are reduced. 300 Vdc conversion modules are regulated converters, and output power is usually 500 W, so to supply power (1.6 kW or more) to many T/R module groups, 3 to 4 DC-DC conversion modules are usually required. . Also, the linear regulator (②) causes a 2 Vdc power dissipation.

Among the electrical/mechanical interface design elements of an active phased array antenna, the most important thing is the antenna operating frequency. When the operating frequency is increased, the distance between the radiating elements is reduced and the distance of the T/R module becomes narrower. Therefore, the DC power distribution system must also be traded off according to the operating frequency.

6 is a block diagram illustrating a transmission/reception module group according to another embodiment of the present invention.

The transmit/receive module group 10 includes a plurality of transmit/receive modules 500 including a DC-DC converter 100 , a plurality of buck regulators 200 , a plurality of switches 300 , a plurality of capacitor banks 400 , and transmit amplifiers. ), and a control module 600 .

The DC-DC converter 100 converts an input DC voltage into an output DC voltage.

A plurality of buck regulators 200 are connected to the DC-DC converter 100 and control the voltage using a resonance circuit. A buck regulator can be applied with a buck boost converter and can be implemented as a single module or operated by electrically connecting multiple modules.

The plurality of switches 300 are respectively connected to the plurality of buck regulators 200 and connect or block signal paths.

The plurality of capacitor banks 400 are respectively connected to the plurality of switches 300 and store electrical signals.

A plurality of transmit/receive modules 500 including transmit amplifiers are respectively connected to a plurality of capacitor banks 400 and amplify an electrical signal.

The control module 600 is connected to the DC-DC converter 100 , the plurality of buck regulators 200 , the plurality of switches 300 , and the plurality of capacitor banks 400 , and controls the plurality of switches 300 .

7 and 8 are diagrams illustrating a DC-DC power supply module according to another embodiment of the present invention.

The DC-DC power module included in the transmit/receive module group includes a DC-DC converter, a plurality of buck regulators, a plurality of switches, and a plurality of capacitor banks.

7 and 8, the DC-DC converter is installed in the upper center of the substrate, a plurality of buck regulators and a plurality of switches are installed around the upper portion of the substrate, and a plurality of capacitor banks are installed in the lower portion of the substrate. is installed

Referring to the designed high-efficiency high-voltage DC-DC power module, the high-efficiency high-voltage DC-DC power module that can be provided to 16 groups of TR modules includes ① a high-efficiency high-voltage bus converter, ② a 16-channel buck regulator with a 2A current limiting circuit, and transmit Enable On. /Off switching circuit, ③ For long-distance detection, a 16-channel high-capacity charging capacitor bank stage to implement a long transmission pulse width can be applied. (1 channel: 300~500 uF Х 8ea)

High-efficiency high-voltage DC-DC power module consists of ① high-efficiency/high-voltage bus converter and ② 16-channel buck regulator with 2A current limiting circuit and transmission enable on/off switching circuit on the upper layer, and ③ long transmission pulse for long-distance detection on the lower layer. A 16-channel high-capacity charging capacitor bank stage for width implementation can be applied. (1 channel: 300~500 uF Х consists of 8, 16 channels of 128)

In the antenna system, which is the core device of AESA radar, the DC-DC power module is miniaturized and light-weighted to form an integrated module with the TR module.

9 is a diagram illustrating a DC-DC power module to which a high voltage of 800 Vdc is input from the AESA antenna according to another embodiment of the present invention.

The DC-DC converter may convert an input DC voltage in the range of 736 V to 800 V into an output DC voltage in the range of 46 V to 50 V by 1/16 times.

In FIG. 9, ① denotes a high-efficiency high-voltage distributed DC-DC converter (Bus converter). The bus converter operates with an input voltage of 800 Vdc and an output voltage of 1/16 times, a step-down efficiency of 97%, and an output of 1.7kW. If the input voltage of the system is limited to 300 Vdc, it can be operated with 1/8 times the output voltage, 97% step dwon efficiency, and 1.7 kW output.

In FIG. 9, ② denotes a switching regulator (Buck regulator). The buck regulator can maintain a constant efficiency by controlling the output voltage using an LC resonance circuit. Only the FET switch resistance loss will exist. ③ is the transmit Enable On/Off switch and energy charging capacitor bank, and ④ is N TR modules.

The control module may perform a built-in test by transmitting and receiving test signals to and from the DC-DC converter, the plurality of buck regulators, the plurality of switches, and the plurality of capacitor banks.

The transmit/receive module group and the DC-DC power module may include a spare regulator, a spare switch, and a spare capacitor bank.

The spare regulator may replace some of the plurality of buck regulators, the spare switch may replace some of the plurality of switches, and the spare capacitor bank may replace some of the plurality of capacitor banks.

10 to 12 are diagrams illustrating a connection structure of a transmission/reception module group according to another embodiment of the present invention.

Referring to FIG. 10 , a first buck regulator 201 , a second buck regulator 202 , an N-th buck regulator 203 , and a spare buck regulator 204 are connected to the DC-DC converter 100 . The first buck regulator 201 , the second buck regulator 202 , the N-th buck regulator 203 , and the spare buck regulator 204 include a first switch 301 , a second switch 302 , and an N-th switch 303 . ), the preliminary switch 304 is connected to each. The first switch 301 , the second switch 302 , the Nth switch 303 , and the preliminary switch 304 include a first capacitor bank 401 , a second capacitor bank 402 , and an Nth capacitor bank 403 . , and a spare capacitor bank 404 are respectively connected.

10 is a diagram illustrating an operation in a group unit. If some of the first buck regulator 201, the first switch 301, and the first capacitor bank 401 group fall under a fault condition, the spare buck regulator 204, the spare switch 304, and the spare capacitor bank 404 ) group is replaced. Each component is connected in a group unit.

11 is a diagram illustrating an operation of a relay method in individual units. If the first buck regulator 201 is in a fault condition, it is replaced with the second buck regulator 202 , the second buck regulator 202 is replaced with the N-th buck regulator 203 again, and the N-th buck regulator 203 is It is replaced with the spare regulator 204 again. The switch connected to the buck regulator is also replaced by a relay method. If the Nth capacitor bank 403 is in a fault condition, it is replaced with a spare capacitor bank 404 . Each component is connected as an individual unit. Based on this connection structure, it is possible to match the channel length similarly and the operation time uniformly through relay replacement.

12 is a diagram connected in a dual structure. They are interchangeable in pairs.

13 is a diagram illustrating a buck regulator of a DC-DC power supply module according to another embodiment of the present invention.

Referring to the bus converter, the power system of the AESA radar is designed to improve energy efficiency and reduce losses up to the T/R module. By inputting the input voltage as high as 300 Vdc to 800 Vdc, the output voltage of the high-efficiency/large-capacity bus converter (DC-DC converter, 16:1 Step-down) is stepped down to 46 ~ 50 Vdc.

In FIG. 13, ① is a Buck converter (ⓐ R1: current sensing, ⓑ PWM (Pulse Width Modulation) signal, ⓒ FET 1 (Q1), ⓓ FET 2 (Q2)), ② is L1, inductor, ③ is energy charging capacitor bank.

14 is a diagram illustrating an operation principle of a buck regulator of a DC-DC power supply module according to another embodiment of the present invention, and FIG. 15A is an operation of a buck regulator of a DC-DC power supply module according to another embodiment of the present invention. 15B is a flowchart illustrating the operation of a mixed structure of a buck regulator and a buck boost converter of a DC-DC power supply module according to another embodiment of the present invention.

Multiple buck regulators can operate with a maximum current limit of 2 A.

Referring to the Buck regulator, R1 transfers current information from the resistor to the control circuit for input current detection. When FET1 (Q1) is turned on, power is supplied to the output stage charging capacitor bank through L1. When FET1 (Q1) is turned off, FET2 (Q2) is turned on to allow the energy charged in L1 to flow to the output stage charging capacitor bank. FET1 (Q1) and FET2 (Q2) are controlled by a PWM (Pulse Width Modulation) signal in the control circuit. The ON/OFF pulse width calculates the output voltage and input current (limited to the maximum average current of 2A) and provides a control signal to maintain a constant output voltage at all times.

Referring to FIG. 15A , when only the buck regulator is applied, an input voltage of 736 V to 800 V may be operated with an output voltage of 46 V to 50 V.

Referring to FIG. 15B , when a mixed structure of a buck regulator and a buck boost converter is applied, an input voltage of 640 V to 800 V is operated with an output voltage of 40 V to 50 V, and the final output voltage is 45.3 V, a fixed output is possible. .

16 is a diagram illustrating a buck regulator and a charge capacitor bank circuit of a DC-DC power supply module according to another embodiment of the present invention.

It is implemented as a high-capacity energy charging capacitor bank stage circuit to implement a transmission enable On/Off switch and a long transmission pulse width for long-distance detection.

In FIG. 16, ⓐ is a Buck regulator (Synchronous Step-down Regulator), ① is L1 (Inductor): a current control inductor, ⓑ is a transmission Enable On/Off switching and energy charging capacitance bank circuit, ② is a charging capacitance, ⓒ is the pulsed HPA equivalent circuit, and ③ is the TR module equivalent resistance.

ⓐ Buck regulator circuit is a synchronous step-down regulator, and it receives the PWM On/Off control signal and calculates the output voltage/current flowing through L1 (inductor, ①) to maintain a constant voltage.

ⓑ Transmission Enable on/off switching and energy charging capacitor bank circuit includes high-capacity energy charging capacitors to minimize voltage/current drop due to load change during a long transmission pulse period. (Eight 300-500 uF Х per channel)

ⓒ Pulsed HPA equivalent circuit sets the load resistance of the GaN-type HPA semiconductor device to 2~5 Ω. (HPA current: 10-20 A max)

The drain power consumption of the GaN 200W high-power amplifier is 11.78A under CW condition. When operated in pulse mode, when operated at 15% duty, the average current is 1.76A (11.78A Х 0.15). Therefore, input range 3.4 ~ 65 Vdc, current 2A, Synchronous Step-down Regulator can be used. And with LTSpice, the operating characteristics can be simulated with the full Buck regulator, switching circuit and energy-charged capacitor bank and Plused HPA equivalent load conditions.

17 is a diagram illustrating a result of a charging voltage/current waveform according to a simulation performed for a buck regulator and a charging capacitor bank circuit of a DC-DC power supply module according to another embodiment of the present invention. 18 is an enlarged view of voltage waveforms according to simulations performed with respect to a buck regulator and a charge capacitor bank circuit of a DC-DC power module according to another embodiment of the present invention.

The current (③) flowing through the HPA load resistor was seen as a characteristic result of 11.78A, and the current (①) flowing through L1 is charged to 45.3 Vdc before the next transmission starts when the energy charging capacitor bank terminal voltage (②) is charged in the transmission enable off section. , the current showed a characteristic that no further charging was required.

The analysis result confirmed that it is a high-speed charging/discharging circuit sufficient for transmitting/receiving in radar actual operation. The transmit pulse On time was set at 300 us, and the pulse period was set at 2 ms, with a duty of 15%. In the 1.7ms receiving section (transmission enable off section), the voltage of the energy charging capacitor bank is charged to 45.3 Vdc required by HPA before the next transmission starts, and it was confirmed that almost no current flows after 45.3 Vdc charging. It was confirmed through simulation results that the constant voltage/constant current function of the buck regulator operates normally.

19 is a diagram illustrating charging and discharging results for a buck regulator and a charging capacitor bank circuit of a DC-DC power supply module according to another embodiment of the present invention.

These are the test results of the charge/discharge voltage and current applied to the load resistor. During 300us, which is the transmit Enable On section, the discharge voltage showed a charge/discharge characteristic of 45 Vdc <-> 43 Vdc, and the current showed a current drop characteristic of 12A -> 11.7A. It was confirmed that the charging voltage was normally charged to 45 Vdc in the transmission enable off (switch on) section before the next transmission time.

20 is a diagram illustrating a connection diagram of a DC-DC power module and a pulsed GaN-type HPA interworking test of a DC-DC power module according to another embodiment of the present invention.

ⓑ is a high-efficiency high-voltage DC-DC power module, ① is a high-efficiency high-voltage bus converter, ② is a manufactured buck regulator, and ③ is an On/Off switching and charging capacitor bank.

In the high-efficiency high-voltage DC-DC power module and pulsed GaN HPA interworking test, ⓐ is a commercial power supply (input 736 ~ 800Vdc), ⓑ is a high-efficiency high-voltage DC-DC power module, ① is a high-efficiency high-voltage bus converter, and ② is the manufactured Buck regulator, ③ is On/Off switching and charging capacitor bank, and ⓒ is Pulsed GaN 200W HPA.

The bus converter (①) output of the high-efficiency high voltage DC-DC power module (ⓑ) is step down at a ratio of 16:1, and the input voltage 736 ~ 800 Vdc is converted to 46 ~ 50 Vdc, and it has a high efficiency performance of over 97%.

21 is a diagram illustrating a test result of a DC-DC power module and a pulsed GaN type HPA interworking test of a DC-DC power module according to another embodiment of the present invention. This is the result of measuring the RF output power tested in conjunction with the actual RF GaN-type pulsed HPA. It was confirmed that the RF output characteristic satisfies the standard by performing normal pulsed output characteristics of 200W or more and fast charging/discharging for 1.7 ms in a transmission pulse width of 300 us.

The power source directly affects the operation of the latest radar, and in a situation where stable and reliable power supply is required, the high-efficiency high-voltage DC-DC power conversion module of the present invention is a high-efficiency bus converter that converts 800 Vdc power to 50 Vdc, power In order to protect the inrush current in the capacitor during initial application, a current limit of 2A is placed in the Buck regulator to solve the problem of excessive inrush current. A high-capacity charging capacitor bank stage for realizing a long transmission pulse width for transmission on/off switch and long-distance detection is applied.

The high-efficiency high-voltage DC-DC power module presents a high-efficiency high-voltage DC-DC power module structure that converts the 800 Vdc input voltage, 2.67 times higher than the existing 300 Vdc, into 45 Vdc. Input high-efficiency high-voltage Bus DC-DC converter module (736 ~ 800 Vdc to 46 ~ 50 Vdc conversion) applied, Buck regulator with 2A current limiting circuit implemented, Transmission On/Off switch and long transmission pulse width for long-distance detection A high-capacity energy charging capacitor bank stage circuit was fabricated/tested, and the output characteristics were verified by performing an interlocking test with a GaN-type pulsed HAP for a 300us pulse width. It was confirmed that the voltage/current pulse reinforcement performance, RF output performance were satisfied, and the high-speed charging/discharging characteristics were within the specification.

When high-efficiency high-voltage DC-DC power conversion technology is applied, group unit T/R modules (8 to 16) and DC-DC power conversion modules can be integrated. The DC power distribution system can be implemented as a distributed system to simplify the interface. It provides 800 Vdc high voltage, high efficiency, high output power to the antenna system. The size/weight of the active phased array antenna can be dramatically reduced, and the antenna power consumption can be reduced by hundreds of kW with a high-efficiency system, making it possible to realize a small, lightweight, and high-efficiency distributed DC power distribution system.

The high-efficiency high-voltage DC-DC power conversion module for AESA increases SWaP-C (space: space, weight: weight and power: power - Cooling: calorific value) margins and reduces hardware according to space, weight, power efficiency and heat dissipation, can be reduced Reduces integration costs/risks and reduces maintenance costs. For ground platform systems, reduced system weight and higher reliability are achieved. For large tier array devices, higher power efficiency is provided along with extended generator life. For maritime and air systems, better SWaP margins are provided in space, weight, power and calorific value designs. It can be implemented in one piece with the group unit TR module (8 to 16), improving maintainability, reliability, and accessibility.

The present embodiments are for explaining the technical idea of the present embodiment, and the scope of the technical idea of the present embodiment is not limited by these embodiments. The protection scope of this embodiment should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present embodiment.

Claims (11)

In the transmission/reception module group of the AESA (Active Electronically Scanned Array) radar,
a DC-DC converter for converting an input DC voltage into an output DC voltage;
a plurality of buck regulators connected to the DC-DC converter and controlling a voltage using a resonance circuit;
a plurality of switches respectively connected to the plurality of buck regulators and configured to connect or block signal paths;
a plurality of capacitor banks respectively connected to the plurality of switches and storing electrical signals;
a plurality of transmission/reception modules each connected to the plurality of capacitor banks and including transmission amplifiers for amplifying the electrical signal; and
a control module connected to the DC-DC converter, the plurality of buck regulators, the plurality of switches, and the plurality of capacitor banks, and controlling the plurality of switches;
The DC-DC converter is installed in the upper center of the substrate,
The plurality of buck regulators and the plurality of switches are installed around an upper portion of the substrate,
A DC-DC power supply module in which the plurality of capacitor banks are installed under the substrate is included in the transmit/receive module group. According to claim 1,
The DC-DC converter converts an input DC voltage in the range of 736 V to 800 V to an output DC voltage in the range of 46 V to 50 V by 1/16 times. According to claim 1,
The plurality of buck regulators apply a plurality of buck boost converters,
The DC-DC converter converts an input DC voltage in the range of 640 V to 800 V into an output DC voltage in the range of 40 V to 50 V by 1/16 times. According to claim 1,
The plurality of buck regulators operate by limiting the maximum current to 2A. delete According to claim 1,
The control module transmits and receives test signals to and from the DC-DC converter, the plurality of buck regulators, the plurality of switches, and the plurality of capacitor banks to perform a self-check (Built in Test) of the AESA radar A group of sending and receiving modules. According to claim 1,
The AESA radar transmission/reception module group body, characterized in that it includes a spare regulator replacing some of the plurality of buck regulators. According to claim 1,
AESA radar transmission/reception module group body, characterized in that it includes a spare switch replacing some of the plurality of switches. According to claim 1,
The AESA radar transmission/reception module group body, characterized in that it includes a spare capacitor bank replacing a part of the plurality of capacitor banks. In an AESA (Active Electronically Scanned Array) radar,
a plurality of radiation elements for radiating electromagnetic waves; and
It includes a group of transmitting and receiving modules connected to the plurality of radiation elements,
The transmit/receive module group,
a DC-DC converter for converting an input DC voltage into an output DC voltage;
a plurality of buck regulators connected to the DC-DC converter and controlling a voltage using a resonance circuit;
a plurality of switches respectively connected to the plurality of buck regulators and configured to connect or block signal paths;
a plurality of capacitor banks respectively connected to the plurality of switches and storing electrical signals;
a plurality of transmission/reception modules each connected to the plurality of capacitor banks and including transmission amplifiers for amplifying the electrical signal; and
a control module connected to the DC-DC converter, the plurality of buck regulators, the plurality of switches, and the plurality of capacitor banks, and controlling the plurality of switches;
The DC-DC converter is installed in the upper center of the substrate,
The plurality of buck regulators and the plurality of switches are installed around an upper portion of the substrate,
and a DC-DC power module in which the plurality of capacitor banks are installed under the substrate is included in the transmission/reception module group. 11. The method of claim 10,
AESA radar, characterized in that the plurality of buck regulators apply a plurality of buck boost converters.

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