Broadband beam hopping simulator with self-checking function

Abstract

The invention discloses a broadband beam hopping simulator with a self-checking function, and relates to the field of satellite communication. The device comprises an uplink jump switching and self-checking unit, a downlink jump switching and self-checking unit, a monitoring unit, a key, a liquid crystal display screen, a power supply module and a calibration source, the monitoring unit controls the uplink hopping switching and self-checking unit and the downlink hopping switching and self-checking unit to realize switching between a self-checking mode and a beam hopping mode according to a received instruction, and in the self-checking mode, a calibration signal output by the calibration source is detected; the hardware state of the uplink hopping switching and self-checking unit and the hardware state of downlink hopping switching are obtained, and in the beam hopping mode, uplink and downlink signals are output according to instructions. The invention has the characteristics of wide frequency band, independent hopping switching of uplink and downlink, and self-checking of hardware.

Description

Technical Field

[0001] The invention relates to the field of satellite communications, and in particular to a broadband beam hopping simulator with a self-checking function. Background Art

[0002] With the development of satellite communications, the number of satellites in orbit is increasing, the data transmission rate is getting higher and higher, the frequency usage between the satellite and the ground is becoming more and more tense, and the interference of space signals is becoming more and more serious. In order to solve the problems of tight frequency usage and frequency interference, the beam usage mode of satellite communications has changed from traditional mechanical point beam to phased array antenna hopping beam. The beam hopping function of the phased array antenna is closely integrated with the system. Its beam hopping control and signal conversion are determined by the satellite and ground system. The beam hopping function is indispensable in the process of joint debugging and testing of satellite and ground system functions. If a phased array antenna is used to build a wireless beam hopping test environment, the test system will be very complex and have high requirements for the test environment. Therefore, it is urgent to design a device that can simulate and replace the beam hopping function of the phased array antenna. Summary of the invention

[0003] In view of this, the present invention proposes a broadband beam hopping simulator with a self-checking function. The present invention has the characteristics of wide frequency bandwidth, independent uplink and downlink hopping switching, and hardware self-checking.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A broadband beam hopping simulator with a self-checking function, comprising an uplink hopping switching and self-checking unit 1, a downlink hopping switching and self-checking unit 2, a monitoring unit 3, a power supply module 6 and a calibration source 7;

[0006] The uplink hopping switching and self-checking unit 1 comprises an uplink calibration signal input port, M uplink signal input ports, an uplink control signal input port, an uplink calibration signal detection output port and an uplink signal output port;

[0007] The downlink jump switching and self-checking unit 2 includes a downlink calibration signal input port, a downlink signal input port, a downlink control signal input port, a downlink calibration signal detection output port and M downlink signal output ports;

[0008] The calibration source 7 outputs two identical calibration signals, which are transmitted to the uplink hopping switching and self-testing unit 1 and the downlink hopping switching and self-testing unit 2 respectively; and also outputs a calibration source status reporting signal to the monitoring unit 3;

[0009] The monitoring unit 3 includes an external interaction port, an uplink control signal output port, a downlink control signal output port, a calibration signal input port, an uplink calibration signal detection input port, and a downlink calibration signal detection input port; the external interaction port is used to receive external instructions and report the working status of the current broadband beam hopping simulator to an external device, and the instructions include switching between a self-test mode and a beam hopping mode and port selection;

[0010] The uplink control signal output port is used to output the received instruction to the uplink jump switching and self-test unit 1, and the downlink control signal output port is used to output the received instruction to the downlink jump switching and self-test unit 2; the calibration signal input port is used to receive a calibration source status reporting signal output by the calibration source 7, which is used to monitor the working status of the calibration source;

[0011] The uplink calibration signal detection input port is used to receive the uplink calibration signal detection information output by the uplink hopping switching and self-checking unit 1, and the downlink calibration signal detection input port is used to receive the downlink calibration signal detection information output by the downlink hopping switching and self-checking unit 2;

[0012] The monitoring unit 3 compares the uplink calibration signal detection information or the downlink calibration signal detection information with the calibration signal level reference value stored internally, and completes the hardware self-test of the uplink hopping switching and self-test unit 1 or the downlink hopping switching and self-test unit 2;

[0013] For the uplink jump switching and self-checking unit 1, the uplink calibration signal input port receives a calibration signal output by the calibration source 7, and the M uplink signal input ports receive an uplink input signal respectively; the uplink control signal input port receives the instruction transmitted by the uplink control signal output port of the monitoring unit 3, switches the self-checking mode and the beam jumping mode and selects the port; when switching to the self-checking mode, the uplink calibration signal detection output port outputs the detection information of the calibration signal after passing through the uplink jump switching and self-checking unit 1; when switching to the beam jumping mode, the uplink signal output port is controlled to output one of the uplink input signals according to the instruction;

[0014] For the downlink jump switching and self-test unit 2, the downlink calibration signal input port receives a calibration signal output by the calibration source 7, and the downlink signal input port receives the downlink input signal; the downlink control signal input port receives the instruction transmitted by the downlink control signal output port of the monitoring unit 3, switches the self-test mode and the beam jump mode, and selects the port; when switching to the self-test mode, the downlink calibration signal detection output port outputs the detection information of the calibration signal after passing through the downlink jump switching and self-test unit 2; when switching to the beam jump mode, one of the downlink signal output ports is controlled to output the downlink input signal according to the instruction;

[0015] The power supply module 6 is connected to an external power supply and is used to supply power to the uplink jump switching and self-testing unit 1 , the downlink jump switching and self-testing unit 2 and the monitoring unit 3 .

[0016] Further, the uplink hopping switching and self-checking unit 1 comprises an uplink input coaxial switch 101, an uplink calibration signal power divider 102, a calibration signal load 103, an uplink switch unit 104, an uplink output coaxial switch 105, an uplink calibration signal filter 106 and an uplink detector 107;

[0017] The uplink input coaxial switch 101 and the uplink output coaxial switch 105 each include a signal input port, a signal control port and two signal output ports;

[0018] The signal input port of the uplink input coaxial switch 101 is the uplink calibration signal input port of the uplink jump switching and self-test unit 1; the first signal output port of the uplink input coaxial switch 101 is connected to the signal input port of the uplink calibration signal power splitter 102, and the second signal output port of the uplink input coaxial switch 101 is connected to the calibration signal load 103;

[0019] The uplink calibration signal power splitter 102 includes M signal output ports;

[0020] The uplink switch unit 104 includes 2M signal input ports, M signal channels, a signal control port and a signal output port; the M signal input ports of the uplink switch unit 104 are connected to the M signal output ports of the uplink calibration signal power splitter 102, and the remaining M signal input ports are the uplink signal input ports of the uplink jump switching and self-test unit 1; a calibration signal output by the uplink calibration signal power splitter 102 shares a signal channel with an uplink input signal, and the signal control port of the uplink switch unit 104 receives the instruction transmitted by the uplink control signal output port of the monitoring unit 3. When switching to the self-test mode, the uplink switch unit 104 selects one signal channel in turn at fixed intervals and outputs it through the signal output port; when switching to the beam hopping mode, the uplink switch unit 104 selects one of the signal channels according to the instruction control and outputs it through the signal output port;

[0021] The signal output port of the uplink switch unit 104 is connected to the signal input port of the uplink output coaxial switch 105, the first signal output port of the uplink output coaxial switch 105 is connected to the signal input port of the uplink calibration signal filter 106, and the second signal output port of the uplink output coaxial switch 105 is the uplink signal output port of the uplink jump switching and self-test unit 1;

[0022] The uplink input coaxial switch 101 and the uplink output coaxial switch 105 both receive instructions transmitted by the uplink control signal output port of the monitoring unit 3 through the signal control port. When switched to the self-test mode, the uplink input coaxial switch 101 and the uplink output coaxial switch 105 both switch to the first signal output port for output. When switched to the beam hopping mode, the uplink input coaxial switch 101 and the uplink output coaxial switch 105 both switch to the second signal output port for output.

[0023] The uplink calibration signal filter 106 is used to select the calibration signal and isolate the uplink input signal. The signal output port of the uplink calibration signal filter 106 is connected to the signal input port of the uplink detector 107;

[0024] The signal output port of the uplink detector 107 is the uplink calibration signal detection output port of the uplink hopping switching and self-checking unit 1 .

[0025] Further, the downlink hopping switching and self-checking unit 2 includes a downlink coaxial switch 201, a downlink switch unit 202, a downlink calibration signal combiner 203, a downlink calibration signal filter 204 and a downlink detector 205;

[0026] The downstream coaxial switch 201 includes two signal input ports, a signal control port and a signal output port. The first signal input port of the downstream coaxial switch 201 is the downstream calibration signal input port of the downstream jump switching and self-test unit 2, and the second signal input port of the downstream coaxial switch 201 is the downstream signal input port of the downstream jump switching and self-test unit 2; the downstream coaxial switch 201 receives the instruction transmitted by the downstream control signal output port of the monitoring unit 3 through the signal control port. When switching to the self-test mode, the downstream coaxial switch 201 switches to the first signal input port for input, and when switching to the beam jumping mode, the downstream coaxial switch 201 switches to the second signal input port for input;

[0027] The downlink calibration signal combiner 203 includes M signal input ports;

[0028] The downlink switch unit 202 includes a signal input port, a signal control port, M signal channels and 2M signal output ports; the signal input port of the downlink switch unit 202 is connected to the signal output port of the downlink coaxial switch 201, the M signal output ports of the downlink switch unit 202 are connected to the M signal input ports of the downlink calibration signal combiner 203, and the remaining M signal output ports are the downlink signal output ports of the downlink jump switching and self-test unit 2; the downlink switch unit 202 outputs one calibration signal to the downlink calibration signal combiner 203 and one downlink signal. The output signals share one signal channel; the signal control port of the downlink switch unit 202 receives the instruction transmitted by the downlink control signal output port of the monitoring unit 3. When switched to the self-test mode, the downlink switch unit 202 selects one signal channel in turn at fixed intervals, and transmits the calibration signal to the signal input port of the downlink calibration signal combiner 203 corresponding to the signal channel; when switched to the beam hopping mode, the downlink switch unit 202 selects one of the signal channels according to the instruction control, and transmits the downlink input signal to the downlink signal output port corresponding to the signal channel;

[0029] The signal output port of the downlink calibration signal combiner 203 is connected to the signal input port of the downlink calibration signal filter 204; the downlink calibration signal filter 204 is used to select the calibration signal and isolate clutter, and the signal output port of the downlink calibration signal filter 204 is connected to the signal input port of the downlink detector 205;

[0030] The signal output port of the downlink detector 205 is the downlink calibration signal detection output port of the downlink jump switching and self-checking unit 2 .

[0031] Furthermore, the calibration signal has a frequency different from that of the uplink input signal and the downlink input signal.

[0032] Furthermore, it also includes a button 4 and a liquid crystal display screen 5;

[0033] The monitoring unit 3 also includes a button receiving port and a liquid crystal display interactive port. When the external interactive port of the monitoring unit 3 is not connected to an external device, the monitoring unit 3 receives instructions input by the button 4 through the button receiving port, and the instructions include switching between the self-test mode and the beam jumping mode and the port selection; the monitoring unit 3 reports the working status of the current broadband beam jumping simulator to the liquid crystal display 5 through the liquid crystal display interactive port, and receives display feedback information from the liquid crystal display 5.

[0034] Due to the adoption of the above technical solution, the beneficial effects of the present invention compared with the prior art are:

[0035] 1. The broadband beam hopping simulator of the present invention can convert external command information into specific channel switching commands, thereby realizing the beam hopping function required by the satellite-ground system function joint debugging and testing environment.

[0036] 2. The uplink switch unit and the downlink switch unit, the core components of the present invention, have a fast switching function. The switching time of the switch hardware does not exceed 100ns. The total response time of the simulated satellite beam jump can also be configured, which truly simulates the beam agility process of the satellite-borne phased array antenna.

[0037] 3. The present invention can realize a hardware self-check function by detecting the calibration signal, and detect the working status of each signal channel in the uplink switch unit and the downlink switch unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The figure is a schematic diagram of the overall electrical principle of a broadband beam hopping simulator with a self-checking function according to an embodiment of the present invention.

[0039] Figure 2 Schematic diagram of the electrical principle of the uplink hopping switching and self-testing unit in an embodiment of the present invention.

[0040] Figure 3 Schematic diagram of the electrical principle of the downlink hopping switching and self-testing unit in an embodiment of the present invention.

[0041] Figure 4 Schematic diagram of the electrical principle of the monitoring unit in an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0043] A broadband beam hopping simulator with self-checking function, such as Figure 1 As shown, it includes an uplink jump switching and self-test unit 1, a downlink jump switching and self-test unit 2, a monitoring unit 3, a power supply module 6 and a calibration source 7;

[0044] The uplink hopping switching and self-checking unit 1 comprises an uplink calibration signal input port, M uplink signal input ports, an uplink control signal input port, an uplink calibration signal detection output port and an uplink signal output port;

[0045] The downlink jump switching and self-checking unit 2 includes a downlink calibration signal input port, a downlink signal input port, a downlink control signal input port, a downlink calibration signal detection output port and M downlink signal output ports;

[0046] The calibration source 7 outputs two identical calibration signals, which are transmitted to the uplink hopping switching and self-testing unit 1 and the downlink hopping switching and self-testing unit 2 respectively; and also outputs a calibration source status reporting signal to the monitoring unit 3;

[0047] The monitoring unit 3 includes an external interaction port, an uplink control signal output port, a downlink control signal output port, a calibration signal input port, an uplink calibration signal detection input port, and a downlink calibration signal detection input port; the external interaction port is used to receive external instructions and report the working status of the current broadband beam hopping simulator to an external device, and the instructions include switching between a self-test mode and a beam hopping mode and port selection;

[0048] The uplink control signal output port is used to output the received instruction to the uplink jump switching and self-test unit 1, and the downlink control signal output port is used to output the received instruction to the downlink jump switching and self-test unit 2; the calibration signal input port is used to receive a calibration source status reporting signal output by the calibration source 7, which is used to monitor the working status of the calibration source;

[0049] The uplink calibration signal detection input port is used to receive the uplink calibration signal detection information output by the uplink hopping switching and self-checking unit 1, and the downlink calibration signal detection input port is used to receive the downlink calibration signal detection information output by the downlink hopping switching and self-checking unit 2;

[0050] The monitoring unit 3 compares the uplink calibration signal detection information or the downlink calibration signal detection information with the calibration signal level reference value stored internally, and completes the hardware self-test of the uplink hopping switching and self-test unit 1 or the downlink hopping switching and self-test unit 2;

[0051] Specifically, Figure 4As shown, in this embodiment, the monitoring unit 3 is a control board based on the XILINX ZYNQ7000 development platform. Zynq is a heterogeneous system chip that uses SOC technology to integrate dual-core ARM and FPGA programmable logic on a single chip. External interfaces include LAN interface, LVDS interface, CAN interface, I / O port and RS232 interface, etc. Among them, the monitoring unit 3 communicates with the button and calibration source through the ARM I / O port, interacts with the fan through the ARM I / O port and the level conversion chip, and communicates with the detector through the ARM CAN interface and the CAN interface chip to realize the calibration source level reporting; interacts with the LCD screen through the ARM USART port and the RS232 interface chip to realize the real-time display of the working status of the equipment. Communicate with the station control through the ARM Ethernet port and the LAN interface chip, receive the settings of the host computer (such as channel switching, fan speed setting, etc.), and report the working status of the beam hopping simulator device (such as channel in place indication, fan speed, etc.) to the host computer;

[0052] The monitoring unit 3 also communicates with the load controller through the LVDS interface of the FPGA, receives the self-test instructions and beam jump instructions of the load controller and reports the working status (such as the selection signal channel, uplink and downlink jump switching and the performance indicators of each signal channel of the self-test unit). The internal FPGA configures the I / O interface according to the self-test instructions and beam jump instructions, and controls the switch unit and the coaxial switch through the level conversion chip;

[0053] In this embodiment, the monitoring unit 3 stores a mapping table between the azimuth, pitch angle information and the ports of the uplink and downlink switch units. When the monitoring unit 3 receives an instruction, it performs corresponding port control based on the azimuth, pitch angle information in the instruction combined with the mapping table. In addition, the monitoring unit 3 can also control the instruction issuance time to achieve response time control of the broadband beam hopping simulator.

[0054] For the uplink jump switching and self-checking unit 1, the uplink calibration signal input port receives a calibration signal output by the calibration source 7, and the M uplink signal input ports receive an uplink input signal respectively; the uplink control signal input port receives the instruction transmitted by the uplink control signal output port of the monitoring unit 3, switches the self-checking mode and the beam jumping mode and selects the port; when switching to the self-checking mode, the uplink calibration signal detection output port outputs the detection information of the calibration signal after passing through the uplink jump switching and self-checking unit 1; when switching to the beam jumping mode, the uplink signal output port is controlled to output one of the uplink input signals according to the instruction;

[0055] For the downlink jump switching and self-test unit 2, the downlink calibration signal input port receives a calibration signal output by the calibration source 7, and the downlink signal input port receives the downlink input signal; the downlink control signal input port receives the instruction transmitted by the downlink control signal output port of the monitoring unit 3, switches the self-test mode and the beam jump mode, and selects the port; when switching to the self-test mode, the downlink calibration signal detection output port outputs the detection information of the calibration signal after passing through the downlink jump switching and self-test unit 2; when switching to the beam jump mode, one of the downlink signal output ports is controlled to output the downlink input signal according to the instruction;

[0056] The power supply module 6 is connected to an external power supply and is used to supply power to the uplink jump switching and self-testing unit 1 , the downlink jump switching and self-testing unit 2 and the monitoring unit 3 .

[0057] Furthermore, if Figure 2 As shown, the uplink hopping switching and self-checking unit 1 includes an uplink input coaxial switch 101, an uplink calibration signal power divider 102, a calibration signal load 103, an uplink switch unit 104, an uplink output coaxial switch 105, an uplink calibration signal filter 106 and an uplink detector 107;

[0058] The uplink input coaxial switch 101 and the uplink output coaxial switch 105 each include a signal input port, a signal control port and two signal output ports;

[0059] The signal input port of the uplink input coaxial switch 101 is the uplink calibration signal input port of the uplink jump switching and self-test unit 1; the first signal output port of the uplink input coaxial switch 101 is connected to the signal input port of the uplink calibration signal power splitter 102, and the second signal output port of the uplink input coaxial switch 101 is connected to the calibration signal load 103;

[0060] The uplink calibration signal power splitter 102 includes M signal output ports;

[0061] The uplink switch unit 104 includes 2M signal input ports, M signal channels, a signal control port and a signal output port; the M signal input ports of the uplink switch unit 104 are connected to the M signal output ports of the uplink calibration signal power splitter 102, and the remaining M signal input ports are the uplink signal input ports of the uplink jump switching and self-test unit 1; a calibration signal output by the uplink calibration signal power splitter 102 shares a signal channel with an uplink input signal, and the signal control port of the uplink switch unit 104 receives the instruction transmitted by the uplink control signal output port of the monitoring unit 3. When switching to the self-test mode, the uplink switch unit 104 selects one signal channel in turn at fixed intervals and outputs it through the signal output port; when switching to the beam hopping mode, the uplink switch unit 104 selects one of the signal channels according to the instruction control and outputs it through the signal output port;

[0062] Specifically, in this embodiment, the uplink switch unit 104 uses GKG27.5-31.1GK-6313 produced by Zhongke Xingguang (Chengdu) Electronics Co., Ltd.; the uplink input coaxial switch 101 and the uplink output coaxial switch 105 use MS-2T2123A-PIN-40G produced by Nanjing Diwei Technology Co., Ltd.;

[0063] The signal output port of the uplink switch unit 104 is connected to the signal input port of the uplink output coaxial switch 105, the first signal output port of the uplink output coaxial switch 105 is connected to the signal input port of the uplink calibration signal filter 106, and the second signal output port of the uplink output coaxial switch 105 is the uplink signal output port of the uplink jump switching and self-test unit 1;

[0064] The uplink input coaxial switch 101 and the uplink output coaxial switch 105 both receive instructions transmitted by the uplink control signal output port of the monitoring unit 3 through the signal control port. When switched to the self-test mode, the uplink input coaxial switch 101 and the uplink output coaxial switch 105 both switch to the first signal output port for output. When switched to the beam hopping mode, the uplink input coaxial switch 101 and the uplink output coaxial switch 105 both switch to the second signal output port for output.

[0065] The uplink calibration signal filter 106 is used to select the calibration signal and isolate the uplink input signal. The signal output port of the uplink calibration signal filter 106 is connected to the signal input port of the uplink detector 107;

[0066] The signal output port of the uplink detector 107 is the uplink calibration signal detection output port of the uplink hopping switching and self-checking unit 1 .

[0067] Furthermore, if Figure 3As shown, the downlink hopping switching and self-checking unit 2 includes a downlink coaxial switch 201, a downlink switch unit 202, a downlink calibration signal combiner 203, a downlink calibration signal filter 204 and a downlink detector 205;

[0068] The downstream coaxial switch 201 includes two signal input ports, a signal control port and a signal output port. The first signal input port of the downstream coaxial switch 201 is the downstream calibration signal input port of the downstream jump switching and self-test unit 2, and the second signal input port of the downstream coaxial switch 201 is the downstream signal input port of the downstream jump switching and self-test unit 2; the downstream coaxial switch 201 receives the instruction transmitted by the downstream control signal output port of the monitoring unit 3 through the signal control port. When switching to the self-test mode, the downstream coaxial switch 201 switches to the first signal input port for input, and when switching to the beam jumping mode, the downstream coaxial switch 201 switches to the second signal input port for input;

[0069] The downlink calibration signal combiner 203 includes M signal input ports;

[0070] The downlink switch unit 202 includes a signal input port, a signal control port, M signal channels and 2M signal output ports; the signal input port of the downlink switch unit 202 is connected to the signal output port of the downlink coaxial switch 201, the M signal output ports of the downlink switch unit 202 are connected to the M signal input ports of the downlink calibration signal combiner 203, and the remaining M signal output ports are the downlink signal output ports of the downlink jump switching and self-test unit 2; the downlink switch unit 202 outputs one calibration signal to the downlink calibration signal combiner 203 and one downlink signal. The output signals share one signal channel; the downlink signal control port of the downlink switch unit 202 receives the instruction transmitted by the control signal output port of the monitoring unit 3. When switched to the self-test mode, the downlink switch unit 202 selects one signal channel in turn at fixed intervals, and transmits the calibration signal to the signal input port of the downlink calibration signal combiner 203 corresponding to the signal channel; when switched to the beam hopping mode, the downlink switch unit 202 selects one of the signal channels according to the instruction control, and transmits the downlink input signal to the downlink signal output port corresponding to the signal channel;

[0071] Specifically, in this embodiment, the downstream switch unit 202 uses GKG17.7-21.3GK-6312 produced by Zhongke Xingguang (Chengdu) Electronics Co., Ltd.; the downstream coaxial switch 201 uses MS-2T2123A-PIN-40G produced by Nanjing Diwei Technology Co., Ltd.;

[0072] The operating frequency band of the uplink switch unit is 27.5GHz to 31GHz, and the operating frequency band of the downlink switch unit is 17.7GHz to 21.2GHz; the channel switching time of the two switch units does not exceed 100ns, and the channel isolation is better than 55dB;

[0073] In this embodiment, the uplink switch unit selects one of the eight uplink input signals for output; the downlink switch unit selects one downlink input signal to be output from one of the eight ports; in the self-check mode, the uplink switch unit and the downlink switch unit switch in sequence in the order of channels 1-8 at fixed intervals;

[0074] The signal output port of the downlink calibration signal combiner 203 is connected to the signal input port of the downlink calibration signal filter 204; the downlink calibration signal filter 204 is used to select the calibration signal and isolate clutter, and the signal output port of the downlink calibration signal filter 204 is connected to the signal input port of the downlink detector 205;

[0075] The signal output port of the downlink detector 205 is the downlink calibration signal detection output port of the downlink jump switching and self-checking unit 2 .

[0076] Furthermore, the calibration signal has a frequency different from that of the uplink input signal and the downlink input signal.

[0077] Specifically, in this embodiment, the calibration signal specifically selects out-of-band (relative to the uplink and downlink operating frequency bands) frequency points to prevent interference to the transmission channel in the frequency hopping switching mode. The final calibration source output frequency is 24GHz; the power level is 10dBm, and the calibration signal can be normally transmitted in the uplink switch unit and the downlink switch unit, with the same transmission performance as the in-band signal;

[0078] The operating center frequency of the calibration signal power divider, calibration signal combiner and calibration signal filter is 24 GHz. The calibration signal filter plays the role of selecting the calibration signal and isolating the uplink and downlink signals. The isolation degree for the uplink operating frequency band (27.5 GHz to 31 GHz) and the downlink operating frequency band (17.7 GHz to 21.2 GHz) is greater than 40 dB.

[0079] The uplink detector and the downlink detector have the same hardware, the operating frequency band is 2GHz to 50GHz, the detection power range is -20dBm to +10dBm, and the power resolution is 0.1dB;

[0080] The inter-channel isolation of the uplink input coaxial switch, the uplink output coaxial switch and the downlink coaxial switch at a frequency of 24 GHz is greater than 65 dB.

[0081] Furthermore, it also includes a button 4 and a liquid crystal display screen 5;

[0082] The monitoring unit 3 also includes a button receiving port and a liquid crystal display interactive port. When the external interactive port of the monitoring unit 3 is not connected to an external device, the monitoring unit 3 receives instructions input by the button 4 through the button receiving port, and the instructions include switching between the self-test mode and the beam jumping mode and the port selection; the monitoring unit 3 reports the working status of the current broadband beam jumping simulator to the liquid crystal display 5 through the liquid crystal display interactive port, and receives display feedback information from the liquid crystal display 5.

[0083] In summary, the present invention has the characteristics of wide frequency bandwidth, independent uplink and downlink hopping switching, hardware self-checking, etc., and is particularly suitable for verifying the satellite beam hopping function.

[0084] Those skilled in the art will appreciate that the embodiments described are intended to help readers understand the principles of the present invention, and should be understood that the scope of protection of the present invention is not limited to the embodiments described. For those skilled in the art, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A broadband beam hopping simulator with self-checking function, characterized in that: It comprises an uplink jump switching and self-testing unit (1), a downlink jump switching and self-testing unit (2), a monitoring unit (3), a power supply module (6) and a calibration source (7); The uplink jump switching and self-checking unit (1) comprises an uplink calibration signal input port, M uplink signal input ports, an uplink control signal input port, an uplink calibration signal detection output port and an uplink signal output port; The downlink jump switching and self-checking unit (2) comprises a downlink calibration signal input port, a downlink signal input port, a downlink control signal input port, a downlink calibration signal detection output port and M downlink signal output ports; The calibration source (7) outputs two identical calibration signals, which are transmitted to the uplink jump switching and self-checking unit (1) and the downlink jump switching and self-checking unit (2) respectively; and also outputs a calibration source status reporting signal to the monitoring unit (3); The monitoring unit (3) comprises an external interaction port, an uplink control signal output port, a downlink control signal output port, a calibration signal input port, an uplink calibration signal detection input port and a downlink calibration signal detection input port; the external interaction port is used to receive external instructions and report the current working state of the broadband beam hopping simulator to an external device, the instructions including the switching between the self-test mode and the beam hopping mode and the selection of a port; The uplink control signal output port is used to output the received instruction to the uplink jump switching and self-test unit (1), and the downlink control signal output port is used to output the received instruction to the downlink jump switching and self-test unit (2); the calibration signal input port is used to receive a calibration source status reporting signal output by the calibration source (7) for monitoring the working status of the calibration source; The uplink calibration signal detection input port is used to receive uplink calibration signal detection information output by the uplink jump switching and self-checking unit (1), and the downlink calibration signal detection input port is used to receive downlink calibration signal detection information output by the downlink jump switching and self-checking unit (2); The monitoring unit (3) compares the uplink calibration signal detection information or the downlink calibration signal detection information with the calibration signal level reference value stored internally, and completes the hardware self-test of the uplink jump switching and self-test unit (1) or the downlink jump switching and self-test unit (2); For the uplink jump switching and self-test unit (1), the uplink calibration signal input port receives a calibration signal output by a calibration source (7), and the M uplink signal input ports respectively receive an uplink input signal; The uplink control signal input port receives the instruction transmitted by the uplink control signal output port of the monitoring unit (3), switches between the self-check mode and the beam hopping mode and selects the port; when switching to the self-check mode, the uplink calibration signal detection output port outputs the detection information of the calibration signal after the uplink hopping switching and the self-check unit (1); when switching to the beam hopping mode, the uplink signal output port is controlled to output one of the uplink input signals according to the instruction; For the downlink jump switching and self-checking unit (2), the downlink calibration signal input port receives a calibration signal output by the calibration source (7), and the downlink signal input port receives the downlink input signal; the downlink control signal input port receives the instruction transmitted by the downlink control signal output port of the monitoring unit (3), switches between the self-checking mode and the beam jump mode, and selects the port; when switching to the self-checking mode, the downlink calibration signal detection output port outputs the detection information of the calibration signal after passing through the downlink jump switching and self-checking unit (2); when switching to the beam jump mode, one of the downlink signal output ports is controlled to output the downlink input signal according to the instruction; The power supply module (6) is connected to an external power supply and is used to supply power to the uplink jump switching and self-testing unit (1), the downlink jump switching and self-testing unit (2) and the monitoring unit (3).

2. A broadband beam hopping simulator with self-checking function according to claim 1, characterized in that: The uplink jump switching and self-checking unit (1) comprises an uplink input coaxial switch (101), an uplink calibration signal power divider (102), a calibration signal load (103), an uplink switch unit (104), an uplink output coaxial switch (105), an uplink calibration signal filter (106) and an uplink detector (107); The uplink input coaxial switch (101) and the uplink output coaxial switch (105) each include a signal input port, a signal control port and two signal output ports; The signal input port of the uplink input coaxial switch (101) is the uplink calibration signal input port of the uplink jump switching and self-test unit (1); the first signal output port of the uplink input coaxial switch (101) is connected to the signal input port of the uplink calibration signal power divider (102), and the second signal output port of the uplink input coaxial switch (101) is connected to the calibration signal load (103); The uplink calibration signal power splitter (102) comprises M signal output ports; The uplink switch unit (104) comprises 2M signal input ports, M signal channels, a signal control port and a signal output port; the M signal input ports of the uplink switch unit (104) are connected to the M signal output ports of the uplink calibration signal power splitter (102), and the remaining M signal input ports are the uplink signal input ports of the uplink jump switching and self-test unit (1); a calibration signal output by the uplink calibration signal power splitter (102) and an uplink input signal share a signal channel; the signal control port of the uplink switch unit (104) receives instructions transmitted by the uplink control signal output port of the monitoring unit (3); when switching to the self-test mode, the uplink switch unit (104) sequentially selects a signal channel at fixed intervals and outputs it through the signal output port; when switching to the beam hopping mode, the uplink switch unit (104) selects one of the signal channels according to the instruction control and outputs it through the signal output port; The signal output port of the uplink switch unit (104) is connected to the signal input port of the uplink output coaxial switch (105), the first signal output port of the uplink output coaxial switch (105) is connected to the signal input port of the uplink calibration signal filter (106), and the second signal output port of the uplink output coaxial switch (105) is the uplink signal output port of the uplink jump switching and self-test unit (1); The uplink input coaxial switch (101) and the uplink output coaxial switch (105) both receive instructions transmitted by the uplink control signal output port of the monitoring unit (3) through the signal control port; when switched to the self-check mode, the uplink input coaxial switch (101) and the uplink output coaxial switch (105) both switch to the first signal output port for output; when switched to the beam hopping mode, the uplink input coaxial switch (101) and the uplink output coaxial switch (105) both switch to the second signal output port for output; The uplink calibration signal filter (106) is used to select the calibration signal and isolate the uplink input signal, and the signal output port of the uplink calibration signal filter (106) is connected to the signal input port of the uplink detector (107); The signal output port of the uplink detector (107) is the uplink calibration signal detection output port of the uplink jump switching and self-checking unit (1).

3. A broadband beam hopping simulator with self-checking function according to claim 1, characterized in that: The downlink jump switching and self-checking unit (2) comprises a downlink coaxial switch (201), a downlink switch unit (202), a downlink calibration signal combiner (203), a downlink calibration signal filter (204) and a downlink detector (205); The downstream coaxial switch (201) comprises two signal input ports, a signal control port and a signal output port; the first signal input port of the downstream coaxial switch (201) is the downstream calibration signal input port of the downstream jump switching and self-testing unit (2); the second signal input port of the downstream coaxial switch (201) is the downstream signal input port of the downstream jump switching and self-testing unit (2); the downstream coaxial switch (201) receives instructions transmitted by the downstream control signal output port of the monitoring unit (3) through the signal control port; when switching to the self-testing mode, the downstream coaxial switch (201) switches to the first signal input port for input; when switching to the beam jumping mode, the downstream coaxial switch (201) switches to the second signal input port for input; The downlink calibration signal combiner (203) comprises M signal input ports; The downlink switch unit (202) comprises a signal input port, a signal control port, M signal channels and 2M signal output ports; the signal input port of the downlink switch unit (202) is connected to the signal output port of the downlink coaxial switch (201), the M signal output ports of the downlink switch unit (202) are connected to the M signal input ports of the downlink calibration signal combiner (203), and the remaining M signal output ports are the downlink signal output ports of the downlink jump switching and self-test unit (2); the calibration signal output from the downlink switch unit (202) to the downlink calibration signal combiner (203) is connected to the calibration signal output port of the downlink coaxial switch (201). The downlink output signals of the downlink switch unit (202) share a signal channel; the signal control port of the downlink switch unit (202) receives the instruction transmitted by the downlink control signal output port of the monitoring unit (3); when switched to the self-check mode, the downlink switch unit (202) sequentially selects one signal channel at fixed intervals, and transmits the calibration signal to the signal input port of the downlink calibration signal combiner (203) corresponding to the signal channel; when switched to the beam hopping mode, the downlink switch unit (202) selects one signal channel according to the instruction control, and transmits the downlink input signal to the downlink signal output port corresponding to the signal channel; The signal output port of the downlink calibration signal combiner (203) is connected to the signal input port of the downlink calibration signal filter (204); the downlink calibration signal filter (204) is used to select the calibration signal and isolate clutter, and the signal output port of the downlink calibration signal filter (204) is connected to the signal input port of the downlink detector (205); The signal output port of the downlink detector (205) is the downlink calibration signal detection output port of the downlink jump switching and self-checking unit (2).

4. The broadband beam hopping simulator with self-checking function according to claim 1, characterized in that: The calibration signal has a frequency different from that of the uplink input signal and the downlink input signal.

5. The broadband beam hopping simulator with self-checking function according to claim 1, characterized in that: It also includes a button (4) and a liquid crystal display (5); The monitoring unit (3) further comprises a key receiving port and a liquid crystal display screen interaction port. When the external interaction port of the monitoring unit (3) is not connected to an external device, the monitoring unit (3) receives instructions inputted by a key (4) through the key receiving port, wherein the instructions include switching between a self-check mode and a beam hopping mode and port selection. The monitoring unit (3) reports the working state of the current broadband beam hopping simulator to the liquid crystal display screen (5) through the liquid crystal display screen interaction port, and receives display feedback information of the liquid crystal display screen (5).

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