CN115276846A - X-frequency-band monopulse tracking analog signal source output device - Google Patents
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Abstract
The invention relates to an X-frequency-band monopulse tracking analog signal source output device, which sets various working scenes, simulates various working states of a monopulse tracking receiving antenna, provides a monopulse antenna analog signal source for a monopulse tracking receiver manufacturer, simulates sum-difference channel signals and changes received by the antenna under various scenes, and provides the sum-difference channel signals and the changes for various monopulse tracking receivers to carry out laboratory debugging, testing and inspection; the X-frequency band monopulse tracking antenna simulated by the device has no transmission function and only has receiving capacity, and the antenna outputs X-frequency band and difference channel radio frequency signals; various working scenes of the X-frequency-band monopulse tracking antenna can be simulated; the device can meet the debugging and testing requirements of a single-pulse single-channel, double-channel or three-channel tracking receiver.
Description
Technical Field
The invention relates to an antenna automatic tracking technology, in particular to an X-frequency-band monopulse tracking analog signal source output device.
Background
The single-pulse automatic tracking receiving antenna is generally used for tracking fast moving targets such as medium and low orbit satellites, airplanes and missiles, and the antenna realizes tracking by receiving self-radiated beacons of the targets or signals carrying information. The antenna receives the beacon or the signal, a sum difference signal is formed in the feed source, the sum difference signal is fed to the single-pulse tracking receiver after being amplified, the azimuth and the pitching deviation angle are indicated for the servo system, and automatic tracking of the antenna is achieved.
Due to the lack of a signal source capable of simulating the dynamic signal receiving of the single-pulse tracking antenna, the debugging and inspection work of the single-pulse tracking receiver in a laboratory is generally difficult to carry out, and the field debugging and the functional performance inspection can be carried out after the antenna is installed, so that the research and development efficiency of the single-pulse tracking receiver is restricted.
Disclosure of Invention
Aiming at the problems of antenna tracking and receiving tests, the X-frequency-band monopulse tracking analog signal source output equipment is provided, the analog monopulse tracking and receiving antenna outputs signals under various typical working scenes, and a test signal source is provided for a monopulse tracking receiver to test the function and performance indexes of the receiver.
The technical scheme of the invention is as follows: an X-frequency-band monopulse tracking analog signal source output device comprises a signal generating unit, an adjustable attenuator A, 5 power dividers, an adjustable attenuator B, an adjustable phase shifter A, a power supply module for supplying power, a numerical control unit, an adjustable attenuator C and an adjustable phase shifter B,
the numerical control unit: the device is used for man-machine interaction, parameter setting, state display and internal control of the device;
the signal generation unit: receiving radio frequency signal parameters of the numerical control unit, and simulating the output of radio frequency signals of any frequency point in an X frequency band;
the adjustable attenuator A: the receiving signal generating unit outputs a radio frequency signal, and simulates the change of the power of a receiving target signal in the single pulse tracking process of the antenna under the control of the numerical control unit;
the first power divider and the second power divider: the adjustable attenuator A outputs a signal tracking the working frequency band of the antenna, the signal is divided into two paths by the first power divider, one path of sum channel signal is directly used as sigma-sum channel signal to be output, the other path of difference channel signal is further divided into two path signals of delta AZ azimuth difference and delta EL pitch difference by the second power divider to be respectively subjected to amplitude and phase adjustment;
the adjustable attenuator B: simulating and receiving the delta AZ azimuth difference channel signal, and simulating the amplitude of the delta AZ azimuth difference channel signal under the control of a numerical control unit;
the adjustable attenuator C: the delta EL pitching difference channel signal is received in an analog mode, and the amplitude of the delta EL pitching difference channel signal is simulated under the control of the numerical control unit;
the adjustable phase shifter A: the analog receiving of the delta AZ azimuth difference channel signal simulates the phase of the delta AZ azimuth difference channel signal under the control of the numerical control unit;
the adjustable phase shifter B: receiving the delta EL pitching difference channel signal in an analog mode, and simulating the phase of the delta EL pitching difference channel signal under the control of the numerical control unit;
the third power divider: respectively receiving and outputting the delta AZ azimuth difference signals after amplitude and phase adjustment;
the fourth power divider: inputting the output signals of the three-power divider and the five-power divider, and outputting a delta difference signal;
the fifth power divider: and respectively receiving the delta EL pitch difference signals output after amplitude and phase adjustment.
Preferably, the signal generating unit receives the aperture, the working frequency, the bandwidth and the feed source output mode of the antenna, outputs the radio frequency signal of any frequency point in a frequency band of 7 GHz-9 GHz, and simulates a target radiation source signal.
Preferably, the numerical control unit receives the antenna pointing position set by the user, the initial phase difference of the sum channel and the difference channel, and the pointing positions and the residence time of at most 3 antennas, and performs analog calculation on the signal amplitude and phase relationship of the sum channel and the difference channel to form the linkage relationship of the signal amplitude and the phase between the sum channel and the difference channel.
Preferably, the pointed position of the receiving antenna of the numerical control unit deviates from the zero angle theta of the antenna, the value of the adjustable attenuator A is f∑(θ), the sum channel amplitude attenuation curve is modeled as:
in the formula, the deviation angle theta is mil,1mil =0.05625 degrees; m is a fitting coefficient, and a value formula of m is as follows along with different antenna apertures D:
m(D)＝8290.4D2-8284.3D+13154。
preferably, the adjustable attenuator B and the adjustable attenuator C respectively simulate the amplitude of the Δ AZ azimuth difference channel signal and the amplitude of the Δ EL pitch difference channel signal, and the values of the two signals are respectively alphaAZAnd alphaEL：
In the formula, P is zero depth input by a user, unit dB and feed source performance simulation; thetaAZAnd thetaELRespectively the azimuth and the pitch deviation angle input by the user in unit of mil; thetaAZAnd thetaELFor signed values, the target is located to the right of the antenna, thetaAZIs a positive number; target to the left of the antenna, thetaAZIs a negative number; the target is located with the antenna pointing upwards, thetaELIs a positive number; the target is located below the antenna pointing downwards, thetaELIs a negative number; the antenna is directed to the difference beam null, thetaAZAnd thetaELTaking a value of 0; f is the working frequency in GHz; f. of∑(θAZ) And f∑(θEL) Are each thetaAZAnd thetaELSubstitution into f∑The calculation of the formula (θ) is in dB.
Preferably, the values of the adjustable phase shifter A and the adjustable phase shifter B are respectively phsAZAnd phsELUnit °:
PhsAZ(θAZ)＝(2-sgn(θAZ+Phs0AZ))·90°+Phs0AZ
PhsEL(θEL)＝(2-sgn(θEL+Phs0EL))·90°+Phs0EL
in the formula, phs0AZAnd phs0ELRespectively representing the initial phase difference of the cross coupling of the azimuth channel, the pitching channel and the difference channel in unit degree; thetaAZAnd thetaELRespectively the user input of the azimuth andpitching deviation angle, unit mil;
f (x) = sgn (x) is a sign function, and when x is (negative number, zero, positive number), respectively (-1,0, + 1) is output.
Preferably, the numerical control unit sets a static mode and a dynamic mode, wherein the static mode is as follows: the analog source only works at one point position, namely, the sum-path difference signal pointing to the position is continuously output until the user changes the setting; dynamic mode: the simulation source provides 3 point locations, and according to the user point location coordinates and the setting of the residence time of each point location, the 3 point locations are automatically switched in sequence and continuously circulated.
The invention has the beneficial effects that: the invention relates to an X-frequency-band monopulse tracking analog signal source output device, which provides monopulse antenna analog signal sources for monopulse tracking receiver manufacturers, simulates sum-difference channel signals and changes received by an antenna under various scenes, and provides the signals to various monopulse tracking receivers for laboratory debugging, testing and inspection; the X-frequency band monopulse tracking antenna simulated by the device has no transmission function and only has receiving capacity, and the antenna outputs X-frequency band and difference channel radio frequency signals; various working scenes of the X-frequency-band monopulse tracking antenna can be simulated; the device can meet the debugging and testing requirements of a single-pulse single-channel, double-channel or three-channel tracking receiver.
Drawings
FIG. 1 is a schematic block diagram of an X-band monopulse tracking analog signal source output device according to the present invention;
FIG. 2 is a schematic diagram of a front panel structure of an X-band single-pulse tracking analog signal source output device according to the present invention;
FIG. 3 is a schematic diagram of a rear panel structure of an X-band single-pulse tracking analog signal source output device according to the present invention;
FIG. 4 is a diagram illustrating the amplitude of sum and difference channel signals;
FIG. 5 is a schematic diagram of the phase relationship of the sum and difference channel signals;
FIG. 6 is a graph of a difference channel signal relationship;
fig. 7 is a flow chart of the operation of the output device of the X-band monopulse tracking analog signal source according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Aiming at various monopulse tracking antenna characteristics and signal sources required by various monopulse tracking receivers for debugging, the invention provides a simulation signal source which can be used for X-frequency band monopulse tracking receiver debugging and testing under the condition of no real X-frequency band monopulse tracking antenna. As shown in fig. 1, the schematic block diagram of the output device of the X-band single-pulse tracking analog signal source includes a signal generating unit 1, an adjustable attenuator A2, a power divider 3, an adjustable attenuator B4, an adjustable phase shifter A5, a power module 6, a numerical control unit 7, an adjustable attenuator C8, and an adjustable phase shifter B9. In fig. 1, a plurality of power dividers have the same characteristics and can be interchanged.
Fig. 1 is a schematic diagram of a front panel and a rear panel of an X-band single-pulse tracking analog signal source output device shown in fig. 2 and 3, and includes a device front panel 10, an oled display screen 11, a status indication LED12, a content selection input key 13, an input confirmation and cancel key 14, a ship-type power switch 15, a device rear panel 16, a sigma-sum (sum channel) signal output socket 17, a remote control socket 18 (UTP network interface), a Δ difference (difference channel) signal output 19 (N-50 KF socket), a Δ AZ difference (difference channel) signal output 20 (N-50 KF socket), a Δ EL pitch difference (pitch difference channel) signal output socket 21 (N-50 KF socket), and an AC 220V AC power socket 22, which are illustrated in the following steps:
(1) Signal generation unit 1: the device is used for providing radio frequency signals of any frequency point in a frequency band of 7 GHz-9 GHz for an analog source, and the signal modulation modes comprise single carrier, amplitude modulation, frequency modulation and phase modulation.
The signal generating unit 1 simulates a target signal received by an antenna, generates an X-band radio frequency signal according to set parameters, and can set output power by a user or defaults to output power P according to the simulated antenna aperture1The formula is as follows: p1= -60dBm +20logD, where, output power P1The unit is dBm; d is dayWire diameter, unit meter.
The frequency, bandwidth and modulation mode of radio frequency signals are input into a front panel of the equipment, and target radiation source signals received by a monopulse tracking antenna are simulated.
(2) The numerical control unit 7: the device is used for man-machine interaction, parameter setting, state display and internal control of equipment, and a user can set various working scenes and simulate various working states of a monopulse tracking receiving antenna. The output state of the front panel OLED (Organic Light-Emitting Diode) display screen can be manually set by a user on the front panel of the analog source; or the input and the output of the numerical control interface of the back panel network. The simulation source parameters can be set in a remote control mode based on a numerical control network remote control interface, and various discrete, intermittent or continuous single-pulse tracking scenes can be developed secondarily.
The numerical control unit 7 receives settings of a user, including antenna aperture, operating frequency, bandwidth, modulation mode (inherent characteristics of analog signals), power (setting power output), antenna pointing position (azimuth and elevation deviation angle), and difference channel initial phase difference, and at most 3 antenna pointing positions and dwell time. The numerical control unit 7 simultaneously displays the working state of the equipment, and the display content includes the output power of the signal generation unit 1, whether the working state is normal, the current numerical control state (local control/remote control), the current antenna pointing position, the residence time and the like.
The numerical control unit comprises the analog computation capability of the signal amplitude and phase relation of the sum and difference channels, and forms the linkage relation of the signal amplitude and phase between the sum and difference channels.
(3) Adjustable attenuator: under the action of the numerical control unit, the X-frequency band radio frequency signals are subjected to controlled attenuation, the range of the attenuation amplitude is 0dB to 60dB, and the step is 0.5dB; can be realized by connecting 2-branch 6-bit control code numerical control attenuators in series.
(4) Power divider/combiner: the passive component can realize one-to-two or two-in-one of the X frequency band signals according to the input and output connection relation.
The adjustable attenuator A2 simulates the change of the power of a received target signal in the single-pulse tracking process of an antenna, and if the power is strongest when the target passes the top, the power is weakest when the target passes the top. The radio frequency signal output by the signal generating unit 1 is divided into two paths after passing through the adjustable attenuator A2 and the power divider 3-1 in sequence. The sum channel signal is directly output as a sum channel signal to a sum channel (sum channel) signal output socket 17 of the analog source device back panel 16, and the socket adopts an N-50KF physical structure. And the other path of difference channel signal is further branched into two channel signals of delta AZ azimuth difference and delta EL pitch difference through a power divider 3-2 to be respectively subjected to amplitude and phase adjustment, and finally the two channel signals are respectively output to an azimuth difference path, a difference path and a pitch difference path through power dividers 3-3, 3-4 and 3-5.
Combining the graph of the sum-difference channel signal amplitude versus the difference channel signal amplitude shown in fig. 4, the sum channel signal amplitude is a solid line, the delta channel signal amplitude is a dashed line, and θ1The single pulse tracking antenna is a typical parabolic antenna for the antenna main beam zero depth corresponding angle, and the signal receiving channel main beam directional diagram can be simulated by a parabolic function. The parabola vertex of the main beam directional diagram of the antenna with different calibers is theoretical gain, and the beam width is related to the parabola coefficient.
Taking the angle theta deviating from the antenna zero point as a horizontal axis, the value of the adjustable attenuator A2, namely the sum channel amplitude attenuation curve, can be simulated as follows:
in the formula, the deviation angle theta is mil,1mil =0.05625 degrees; m is a fitting coefficient, and a value formula of m is as follows along with different antenna apertures D:
m(D)＝8290.4D2-8284.3D+13154。
(5) The adjustable attenuator B4 and the adjustable attenuator C8 respectively simulate the amplitude of the delta AZ azimuth difference channel signal and the delta EL pitch difference channel signal. Each value of which is alphaAZAnd alphaEL：
In the formula, P is zero depth input by a user, unit dB and feed source performance simulation; thetaAZAnd thetaELRespectively the azimuth and the pitch deviation angle input by the user in unit of mil. ThetaAZAnd thetaELFor signed values, the target is located to the right of the antenna, thetaAZIs a positive number; target to the left of the antenna, thetaAZIs a negative number; the target is located with the antenna pointing upwards, thetaELIs a positive number; the target is located below the antenna pointing downwards, thetaELIs a negative number; the antenna is directed to the difference beam null, thetaAZAnd thetaELThe value is 0.D is the aperture of the antenna in meters; f is the working frequency in GHz; f. of∑(θAZ) And f∑(θEL) Are each thetaAZAnd thetaELSubstitution into f∑The calculation of the formula (θ) is in dB.
(6) Adjustable phase shifter: under the action of the numerical control unit, the X-band radio frequency signals are subjected to controlled phase shift, the phase shift range is 0-500 degrees, the step is 2 degrees, and 8-bit control codes are adopted.
Tunable phase shifter A5 and tunable phase shifter B9 simulate the phase of the Δ AZ azimuth difference and Δ EL pitch difference channel signals, respectively. With reference to the schematic diagram of the sum-difference channel signal phase relationship shown in fig. 5 (the magnitude-phase curve of the sigma-sum channel signal is a solid line, and the magnitude-phase curve of the delta-difference channel signal is a dashed line), wherein the fitted magnitude-phase linear variation curve of the difference channel signal
Is a normalized directional sensitivity curve), the values of the adjustable phase shifter A5 and the adjustable phase shifter B9 are respectively phsAZAnd phsELUnit ° (gravity):
PhsAZ(θAZ)＝(2-sgn(θAZ+Phs0AZ))·90°+Phs0AZ
PhsEL(θEL)＝(2-sgn(θEL+Phs0EL))·90°+Phs0EL
in the formula, phs0AZAnd phs0ELCharacterizing azimuth and pitch and difference channel cross-couplings, respectivelyCombined initial phase difference, in degrees; thetaAZAnd thetaELRespectively the azimuth and the pitch deviation angle input by the user in unit of mil.
f (x) = sgn (x) is a sign function, and when x is (negative number, zero, positive number), respectively (-1,0, + 1) is output.
(7) After the amplitudes and phases of signals of the Δ AZ azimuth difference channel and the Δ EL pitch difference channel are precisely adjusted, the signals are combined with a difference channel signal relation diagram (the Δ AZ azimuth difference channel (azimuth difference channel) signal and the Δ EL pitch difference channel (pitch difference channel) signal are in an orthogonal relation, and the signals are synthesized to form a Δ difference channel (difference channel) signal. If the signals of the delta AZ azimuth difference channel and the delta EL pitching difference channel are combined into a delta difference signal, the delta difference signal can be output to a double-channel or single-channel single-pulse tracking receiver for debugging.
(8) The power supply module 6: and the alternating current-to-direct current power supply provides direct current power supply required by work for the X frequency band signal generating unit, the numerical control unit, the adjustable attenuator and the adjustable phase shifter.
The X-frequency band monopulse tracking analog signal source provided by the invention has the following two working modes:
(1) Static mode: the analog source operates at only one point, i.e. continuous output (theta)AZ，θEL) The sum and difference signals pointing to the location until the user changes the settings.
(2) Dynamic mode: the simulation source provides 3 point locations, and according to the user point location coordinates and the setting of the residence time of each point location, the 3 point locations are automatically switched in sequence and continuously circulated.
With reference to the working flow chart of the output device of the X-band monopulse tracking analog signal source shown in fig. 7, the working flow of the X-band monopulse tracking analog signal source of the present invention is as follows:
(1) And setting parameters. The ship-shaped power switch 15 of the front panel 10 of the equipment is pressed to start, if the status indication LED12 and the OLED display screen 11 display normally, the parameters can be set through the content selection input key 13 and the input confirmation and cancel key 14, and the remote setting can also be carried out through the remote control socket network interface 18. The setting item selected by the content selection input key 13 is presented in a character blinking manner, and the content selection input key 13 indicates that the input is completed when the cursor is moved away. All the parameters are set, the input confirmation and cancel keys 14 are pressed for confirmation, and then the simulation source equipment runs internal programs according to the set parameters and outputs signals for debugging. After the parameters are set, the simulation source equipment automatically memorizes, the shutdown does not influence the parameter storage, and the latest set parameters are automatically called after the equipment is restarted. The analog source may maintain 10 sets of parameters.
(2) The operation is performed. And the analog source sequentially completes the adjustment of each adjustable attenuator and each adjustable phase shifter according to the sequence of the sigma-delta channel amplitude, the delta AZ azimuth difference channel amplitude, the delta EL pitching difference channel signal amplitude, the delta AZ azimuth difference channel phase and the delta EL pitching difference channel signal phase according to the set parameter set, and the output of analog signals of each channel is realized. If only 1 pointing position parameter set is set, regardless of whether or not the dwell time is set, the sigma-delta (sum channel) signal output socket 17 of the device rear panel 16 outputs a sigma-delta signal, the Δ AZ azimuth difference circuit (azimuth difference channel) signal output socket 20 outputs a Δ AZ azimuth difference signal, the Δ EL pitch difference circuit (pitch difference channel) signal output socket 21 outputs a Δ EL pitch difference signal, and the Δ difference circuit (difference channel) signal output socket 19 outputs a Δ difference circuit signal. If only more than 1 pointing position parameter set is set, after a dwell time length signal is output at each position according to the position parameter, jumping to the next pointing position, and repeating the cycle.
(3) The interrupt terminates. If the output of the signal is interrupted at the corresponding output port, the ship-shaped power switch 15 of the equipment front panel 10 can be pressed to turn off the power supply; alternatively, the operating frequency is set to other frequencies; alternatively, the output port is connected to an N-type load.
The X-frequency band monopulse tracking analog signal source works in the following scenes:
(1) Debugging and checking the X-frequency single-channel single-pulse tracking receiver. The sum signal input end of the X-band single-channel single-pulse tracking receiver is connected to the sigma-sum path (sum channel) signal output socket 17 of the rear panel 16 of the apparatus of the present invention, the difference signal input end of the X-band single-channel single-pulse tracking receiver is connected to the delta difference path (difference channel) signal output socket 19 of the rear panel 16 of the apparatus of the present invention, and parameters are set as required, so that corresponding debugging and inspection work can be performed.
(2) Debugging and checking the X-frequency-band double-channel single-pulse tracking receiver. The sum signal input end of the X-band single-channel single-pulse tracking receiver is connected to the sigma-sum path (sum channel) signal output socket 17 of the rear panel 16 of the apparatus of the present invention, the difference signal input end of the X-band single-channel single-pulse tracking receiver is connected to the delta difference path (difference channel) signal output socket 19 of the rear panel 16 of the apparatus of the present invention, and parameters are set as required, so that corresponding debugging and inspection work can be performed.
(3) And debugging and checking the X-frequency-band three-channel single-pulse tracking receiver. The sum signal input end of the X-band single-channel single-pulse tracking receiver is connected with a sigma-sum path (sum path) signal output socket 17 of the rear panel 16 of the device, the azimuth difference signal input end of the X-band single-channel single-pulse tracking receiver is connected with a delta AZ azimuth difference path (azimuth difference path) signal output socket 20 of the rear panel 16 of the device, the pitch difference signal input end of the X-band single-channel single-pulse tracking receiver is connected with a delta EL pitch difference path (pitch difference path) signal output socket 21 of the rear panel 16 of the device, and parameters are set as required, so that corresponding debugging and inspection work can be carried out.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. An X-frequency-band monopulse tracking analog signal source output device is characterized by comprising a signal generating unit, an adjustable attenuator A, 5 power dividers, an adjustable attenuator B, an adjustable phase shifter A, a power supply module, a numerical control unit, an adjustable attenuator C and an adjustable phase shifter B,
the numerical control unit: the device is used for man-machine interaction, parameter setting, state display and internal control of the device;
the signal generation unit: receiving radio frequency signal parameters of the numerical control unit, and simulating the output of radio frequency signals of any frequency point in an X frequency band;
the adjustable attenuator A: the receiving signal generating unit outputs a radio frequency signal, and simulates the change of the power of a receiving target signal in the single pulse tracking process of the antenna under the control of the numerical control unit;
the first power divider and the second power divider: the adjustable attenuator A outputs a signal tracking the working frequency band of the antenna, the signal is divided into two paths by the first power divider, one path of sum channel signal is directly used as sigma-sum channel signal to be output, the other path of difference channel signal is further divided into two path signals of delta AZ azimuth difference and delta EL pitch difference by the second power divider to be respectively subjected to amplitude and phase adjustment;
the adjustable attenuator B: simulating and receiving the delta AZ azimuth difference channel signal, and simulating the amplitude of the delta AZ azimuth difference channel signal under the control of the numerical control unit;
the adjustable attenuator C: the delta EL pitching difference channel signal is received in an analog mode, and the amplitude of the delta EL pitching difference channel signal is simulated under the control of the numerical control unit;
the adjustable phase shifter A: the analog receiving of the delta AZ azimuth difference channel signal simulates the phase of the delta AZ azimuth difference channel signal under the control of the numerical control unit;
the adjustable phase shifter B: the delta EL pitching difference channel signal is received in an analog mode, and the phase of the delta EL pitching difference channel signal is simulated under the control of the numerical control unit;
the third power divider: respectively receiving and outputting the delta AZ azimuth difference signals after amplitude and phase adjustment;
the fourth power divider: inputting the output signals of the three-power divider and the five-power divider, and outputting a delta difference signal;
the fifth power divider: and respectively receiving the delta EL pitch difference signals output after amplitude and phase adjustment.
2. The output device of the X-band monopulse tracking analog signal source according to claim 1, wherein the signal generating unit outputs a radio frequency signal of any frequency point in a 7 GHz-9 GHz band to simulate a target radiation source signal, by receiving an antenna aperture, a working frequency, a bandwidth and a feed source output mode.
3. The output device of the X-band monopulse tracking analog signal source of claim 1, wherein said nc unit receives user-set antenna pointing positions, and initial phase differences of sum and difference channels, and performs analog computation of the sum and difference channel signal amplitude and phase relationships to form a linkage relationship of signal amplitude and phase between the sum and difference channels, with a maximum of 3 antenna pointing positions and dwell times.
4. The output device of the X-band monopulse tracking analog signal source of claim 3, wherein the pointing position of the receiving antenna of the NC unit deviates from the null angle θ of the antenna, and the value of the adjustable attenuator A is f∑(θ), the sum channel amplitude attenuation curve is modeled as:
in the formula, the deviation angle theta is mil,1mil =0.05625 degrees; m is a fitting coefficient, and a value formula of m is as follows along with different antenna apertures D:
m(D)＝8290.4D2-8284.3D+13154。
5. the output device of an X-band monopulse tracking analog signal source according to claim 4, wherein the adjustable attenuators B and C respectively simulate the amplitude of the Δ AZ azimuth difference and Δ EL pitch difference channel signals, and the values thereof are αAZAnd alphaEL：
In the formula, P is zero depth input by a user, unit dB and feed source performance simulation; thetaAZAnd thetaELRespectively the azimuth and the pitch deviation angle input by the user in unit of mil; thetaAZAnd thetaELFor signed values, the target is located to the right of the antenna, thetaAZIs a positive number; target to the left of the antenna, thetaAZIs a negative number; the target is located with the antenna pointing upwards, thetaELIs a positive number; the target is located below the antenna pointing at θELIs a negative number; the antenna is directed to the difference beam null, thetaAZAnd thetaELTaking a value of 0; f is the working frequency in GHz; f. of∑(θAZ) And f∑(θEL) Are each thetaAZAnd thetaELSubstitution into f∑The calculation of the formula (θ) is in dB.
6. The output device of claim 4, wherein the value of the adjustable phase shifter A and the value of the adjustable phase shifter B are respectively phsAZAnd phsELUnit °:
PhsAZ(θAZ)＝(2-sgn(θAZ+Phs0AZ))·90°+Phs0AZ
PhsEL(θEL)＝(2-sgn(θEL+Phs0EL))·90°+Phs0EL
in the formula, phs0AZAnd phs0ELRespectively representing the initial phase difference of the cross coupling of the azimuth channel, the pitching channel and the difference channel in unit degree; thetaAZAnd thetaELRespectively the azimuth and the pitch deviation angle input by the user in unit of mil;
f (x) = sgn (x) is a sign function, and when x is (negative number, zero, positive number), respectively (-1,0, + 1) is output.
7. The output device of the X-band monopulse tracking analog signal source according to any one of claims 3 to 6, wherein the numerical control unit sets two modes, static mode and dynamic mode, the static mode: the analog source only works at one point position, namely, the sum-path difference signal pointing to the position is continuously output until the user changes the setting;
dynamic mode: the simulation source provides 3 point locations, and according to the user point location coordinates and the setting of the residence time of each point location, the 3 point locations are automatically switched in sequence and continuously circulated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210645092.3A CN115276846B (en) | 2022-06-09 | 2022-06-09 | X-frequency band single pulse tracking analog signal source output equipment |
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| CN202210645092.3A CN115276846B (en) | 2022-06-09 | 2022-06-09 | X-frequency band single pulse tracking analog signal source output equipment |
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| US20060097940A1 (en) * | 2003-10-30 | 2006-05-11 | Mitsubishi Denki Kabushiki Kaisha | Antenna unit |
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| US20060097940A1 (en) * | 2003-10-30 | 2006-05-11 | Mitsubishi Denki Kabushiki Kaisha | Antenna unit |
| US20070279276A1 (en) * | 2006-05-31 | 2007-12-06 | Harris Corporation | Pseudomonopulse tracking system with variable coupler and integrated LNA |
| CN102722184A (en) * | 2012-06-18 | 2012-10-10 | 中国电子科技集团公司第十研究所 | Monopulse antenna angle simulation tracking method |
| CN103248379A (en) * | 2013-04-03 | 2013-08-14 | 中国人民解放军63680部队 | Small antenna auxiliary radio frequency phase correction method for monopulse track receiver of shipborne satellite communication system |
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| CN107015233A (en) * | 2017-05-10 | 2017-08-04 | 南京理工大学紫金学院 | Integrated fiber formula pseudo noise code amplitude modulation(PAM) offset correction device |
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