KR101434875B1

KR101434875B1 - Electronic tactical air navigation antenna

Info

Publication number: KR101434875B1
Application number: KR1020140091286A
Authority: KR
Inventors: 김유환
Original assignee: 주식회사 제로닉스; 김유환
Priority date: 2014-07-18
Filing date: 2014-07-18
Publication date: 2014-09-04

Abstract

The present invention relates to an electronic TACAN (Tactical Air Navigation) antenna having a real-time correction function. An electronic TACAN (Tactical Air Navigation) antenna according to the present invention includes a monitoring signal detecting unit (120) for detecting a monitoring signal from a radiation wave of a radiator (110) to feedback it; a monitoring signal input selecting unit (130) for outputting the monitoring signal only when he monitoring signal is identical with a radiation angle value received from a control angle timing generating unit (170); an amplitude and phase extracting unit (146) for extracting an amplitude value corresponding to a DC component of 15 Hz or 135 Hz and a phase value of 15 Hz or 135 Hz; a control angle timing generating unit (170) for outputting the radiation angle value to the monitoring signal input selecting unit (130), a correction signal output selecting unit (135) and a radiation signal correcting unit (150); the radiation signal correcting unit (150) for calculating correction values for the amplitude values and the phase values at each frequency of the monitoring signal and adding the correction values to the amplitude and phase values of the monitoring signal corresponding to a current radiation angle value; a correction signal generating unit (181, 182, 183) for generating a 15 Hz correction signal, a 135 Hz correction signal and a DC correction signal; a signal combining unit (185) for combining the correction signals; and a correction signal output selecting unit 135 for controlling such that a corrected signal is output to a corresponding radiator 110. Thus, characteristics of the antenna may be corrected in real time.

Description

[0001] ELECTRONIC TACTICAL AIR NAVIGATION ANTENNA [0002]

The present invention relates to an electronic takan antenna, and more particularly, to an electronic takan antenna having a real-time correction function suitable for detecting a change in operation characteristics of an electronic takan antenna and correcting the changed operation characteristics by a simple configuration. Antenna.

In general, the Tacan (TACAN) antenna is a special device that accurately and safely directs an aircraft to a desired point by providing azimuth information and distance information to an aircraft flying from a ground station.

Although the conventional takan antenna conventionally uses a mechanical takan antenna that is rotated by a motor, recently, an electronically turnable takan antenna is used.

As an example of an electronic takan antenna, an electronic scan TACAN antenna according to a registered patent No. 10-1390168 (public notice: 2014.05.07) is disclosed.

The conventional electronic takan antenna such as the technique disclosed in the Japanese Patent Registration No. 10-1390168 has to be operated by being exposed to the outside, and therefore its amplitude and phase, which are its operating characteristics, have been inevitably changed due to the external environment such as temperature, humidity or climate.

When the operating characteristics change as described above, there arises a problem that error occurs in the azimuth information transmitted from the ground station to the aircraft.

However, in the case of the conventional electric type antenna, there has not been developed a technique for correcting the performance of the antenna whose operation characteristics have been changed. Inevitably, the operation characteristic is measured by the operator as a separate measuring instrument, In this case, the maintenance cost of the maintenance of the takan antenna was increased because the replacement maintenance cost was required.

1. Patent Document 1: Registration No. 10-1390168 (public announcement date: 2014.05.07)

2. Patent Document 2: Registration No. 10-1095184 (public date: December 16, 2011)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and an object of the present invention is to provide an electronic takan antenna provided with a real-

First, even if the electric characteristics (amplitude and phase) of an electric Takan antenna are changed by temperature or other factors, it is possible to maintain optimal antenna characteristics by correcting characteristic values in real time,

Second, correction values of amplitude and phase are calculated for each radiation angle of the electronic takan antenna, and correction signals whose amplitudes and phases are corrected based on the calculated correction values are radiated from the radiator, So that it is possible to maintain the performance of the antenna as a whole optimally,

Third, the threshold value is set in case the measured value is too large or too small. If the measured value is larger than the threshold value, the measured value is compared with the measured value. The measurement value is skipped without calculating the correction value, and the correction value can be calculated based on the threshold value, thereby avoiding the risk of calculating the correction value based on the suddenly changed measurement value, To be secured,

Fourth, when the preliminary correction value exceeds the correction limit value by comparing the preliminary correction value and the correction limit value, the preliminary correction value is skipped and the correction limit value is selected as the correction value, If the value is not directly based on the correction value but is larger than the correction limit value by comparison with the correction limit value, the correction limit value is selected as the correction value so as to prevent the possibility of error in the azimuth measurement due to the abrupt change So that the reliability of the error correction can be increased,

Fifth, a corrected radiation signal is radiated by correcting the fed back signal with a correction value, and a corrected signal whose error is reduced at the next rotation is input as a feedback signal to perform correction again for the signal, In the case of rotation, the correction is performed on the smaller error, and the process of gradually reducing the error between the measured value and the standard value is repeated so that the characteristic as close as possible to the target value (standard value)

Sixth, it is an object of the present invention to provide an electronic takan antenna provided with a real-time correction function suitable for reducing the maintenance cost of the takan antenna by correcting the characteristics of the electronic takan antenna by a simple structure.

According to another aspect of the present invention, there is provided an electronic Tacan antenna having a real-time correction function, the Tacan antenna comprising: a plurality of antennas arranged at equally spaced intervals, A radiator radiating a radiation wave of a signal of 15 Hz and 135 Hz; A plurality of monitoring signal detectors provided in a one-to-one correspondence with the plurality of radiators 110 for detecting a part of a radiation wave radiated from each radiator as a monitoring signal and feeding back the detected monitoring signal to a monitoring signal input selector; A monitoring signal of the radiator corresponding to the current radiation angle value received from the control angle timing generator among the monitoring signals of the number of radiators input from the monitoring signal detector 120, A signal input selection unit; An amplifying unit for amplifying a monitoring signal selected and output by the monitoring signal input selecting unit; A peak extracting unit for extracting a value of a peak point of the monitoring signal amplified by the amplifying unit; An ADC for converting the peak value extracted by the peak extracting unit into a digital signal; The monitoring signal converted into a digital signal by the ADC is converted into a discrete frequency domain by a discrete Fourier transform to convert the discrete time domain signal into a discrete frequency domain to generate an amplitude column in the frequency domain of the monitoring signal, a DFT unit for generating a phase column; 15 Hz, and 135 Hz in the amplitude column generated by the DFT unit, and extracts amplitude and phase values for extracting phase values corresponding to 15 Hz and 135 Hz from the upper row generated by the DFT unit, An extraction unit; A plurality of radiating angles corresponding to the plurality of radiators are sequentially generated, and the generated plurality of radiating angles are set at a predetermined interval by a monitoring signal input selecting unit, a correction signal output selecting unit, and a correction A control angle timing generator for outputting the control angle to the value calculation module; A correction limit setting unit that is a user interface for inputting a correction limit value; And an amplitude and phase value of each frequency of the current monitoring signal received from the amplitude and phase extraction unit when receiving the current radiation angle value from the control angle timing generation unit, A correction value for the amplitude value and the phase value for each frequency of the monitoring signal corresponding to the received current radiation angle value based on the threshold value stored in the internal limit and the correction limit value inputted from the correction limit setting unit, A radiation signal correcting unit for summing the frequency and amplitude of the monitoring signal corresponding to the radiation angle value; A corrected 15 Hz amplitude value obtained by adding the amplitude correction value of 15 Hz to the amplitude value of the monitoring signal of 15 Hz and a corrected 15 Hz phase value obtained by adding the phase correction value of 15 Hz to the phase value of the monitoring signal of 15 Hz from the correction execution module A 15-Hz correction signal generator for generating a 15-Hz correction signal by receiving the 15-Hz correction signal; A 135 Hz amplitude value corrected by adding the amplitude correction value of 135 Hz to the amplitude value of the monitoring signal of 135 Hz and a 135 Hz phase value corrected by adding the phase correction value of 135 Hz to the phase value of the monitoring signal of 135 Hz from the correction execution module A 135 Hz correction signal generation unit for receiving the signal and generating a correction signal of 135 Hz; A DC correction signal generator for receiving a DC amplitude value corrected by adding an amplitude correction value of a DC component to an amplitude value of a DC component monitoring signal from the correction execution module to generate a DC correction signal; A signal synthesizer for converting the signals output from the 15 Hz correction signal generator, the 135 Hz correction signal generator, and the DC correction signal generator into analog signals and synthesizing them; And a correction signal output selection unit for controlling output of the corrected signal output from the base signal synthesis unit to a radiator corresponding to a current radiation angle value received from the control angle timing generation unit.

The present invention provides an electronic type antenna having a real-time correction function, wherein the radiation signal correction unit comprises: a correction limit storage module for storing a correction limit value inputted from the correction limit setting unit; A standard value storing module storing a standard value of an amplitude and a phase according to the radiation angle and the angular frequency; (Hereinafter, referred to as "monitoring value") for each frequency of the current monitoring signal stored in the monitoring value storage module and outputs the amplitude value and phase value of each frequency stored in the standard value storage module Reads a standard value of amplitude and phase, reads the correction limit value stored in the correction limit storage module, and outputs a monitoring value and a threshold value If the monitoring value is less than the threshold value, the difference between the monitoring value and the standard value is set as the preliminary correction value. If the monitoring value is larger than the threshold value, the monitoring value is compared with the threshold value. The difference between the threshold value and the standard value is set as a preliminary correction value, and the preliminary correction value set as described above is compared with the correction limit value stored in the correction limit storage module. If the preliminary correction value is equal to or less than the correction limit value A correction value calculation module for selecting a preliminary correction value as a correction value and skipping the preliminary correction value when the preliminary correction value is larger than the correction limit value and selecting the correction limit value as the correction value; And the amplitude correction value of 15 Hz calculated by the correction value calculation module and outputs the phase value of the monitoring signal of 15 Hz and the phase value of the monitoring signal of 15 Hz z, and adds the amplitude value of the monitoring signal of 135 Hz and the amplitude correction value of 135 Hz calculated by the correction value calculation module, and outputs the sum of the phase value of the monitoring signal of 135 Hz and the phase value of the monitoring signal of 135 Hz And a correction execution module for summing the amplitude correction value of the DC component (0 Hz) calculated by the correction value calculation module and the amplitude value of the monitoring signal of the DC component (0 Hz).

In the case of receiving the new amplitude value and the phase value from the amplitude and phase extraction unit, the monitoring value storage module stores the previously stored amplitude value and the phase value in the previous monitoring value storage module And a previous monitoring value storage module for storing the previous monitoring value received from the monitoring value storing module.

In the electronic takan antenna provided with the real-time correction function of the present invention, 36 radiators are provided in a circular shape at intervals of 10 [deg.], And the monitoring detector is 36 in number.

In the electronic takan antenna having the real-time correction function according to the present invention, 18 radiators are provided in a circular shape at intervals of 20 degrees, and the monitoring detector is 18 in number.

In the electronic type antenna having the real-time correction function according to the present invention, the threshold value is stored in the correction value calculation module.

The threshold value is input to the threshold value input unit, the threshold value input by the threshold value input unit is stored in the threshold value storage module, and the correction value calculation module When receiving the current radiation angle value from the control angle timing generator, reads the threshold value stored in the threshold value storage module.

The electronic takan antenna having the above-described configuration and having the real-time correction function according to the present invention has the following effects.

First, even if the electronic turbine antenna characteristics (amplitude and phase) change due to temperature or other factors, it is possible to maintain optimal antenna characteristics by correcting characteristic values in real time.

Second, correction values of amplitude and phase are calculated for each radiation angle of the electronic takan antenna, and correction signals whose amplitudes and phases are corrected based on the calculated correction values are radiated from the radiator, So that the performance of the antenna as a whole can be optimally maintained.

Third, the threshold value is set in case the measured value is too large or too small. If the measured value is larger than the threshold value, the measured value is compared with the measured value. The measurement value is skipped without calculating the correction value, and the correction value can be calculated based on the threshold value, thereby avoiding the risk of calculating the correction value based on the suddenly changed measurement value, There is an effect that can be secured.

Fourth, when the preliminary correction value exceeds the correction limit value by comparing the preliminary correction value and the correction limit value, the preliminary correction value is skipped and the correction limit value is selected as the correction value, If the value is not directly based on the correction value but is larger than the correction limit value by comparison with the correction limit value, the correction limit value is selected as the correction value so as to prevent the possibility of error in the azimuth measurement due to the abrupt change So that the reliability of the error correction can be improved.

Fifth, a corrected radiation signal is radiated by correcting the fed back signal with a correction value, and a corrected signal whose error is reduced at the next rotation is input as a feedback signal to perform correction again for the signal, In rotation, correction is performed for a smaller error, and the process of gradually reducing the error between the measured value and the standard value is repeated, so that the characteristic that is as close as possible to the target value (standard value) can be obtained.

Sixth, there is an effect that the maintenance cost of the takan antenna can be reduced by correcting the characteristics of the electronic takan antenna by a simple structure.

FIG. 1 is a conceptual layout diagram of a plurality of radiators 110 and a monitoring signal detector 120 in an electronic takan antenna provided with a real-time correction function according to an embodiment of the present invention.
2 is a block diagram of an electronic takan antenna having a real-time correction function according to an embodiment of the present invention.
FIG. 3 is a detailed block diagram of the radiation signal correcting unit 150 in FIG.
4 is a flowchart of a correction value calculating method performed by the correction value calculating module 155 of FIG.
FIG. 5 is a conceptual diagram of a radiation angle for explaining the radiation angle in an electronic takan antenna provided with a real-time correction function according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in the figure, an electronic takan antenna having a real-time correction function according to an exemplary embodiment of the present invention is a known TACAN antenna, which includes a plurality of radiators 110 and a plurality of monitoring signals A detection unit 120, a monitoring signal input selection unit 130, an amplification unit 141, a peak extraction unit 142, an ADC 143, a DFT unit 145, an amplitude and phase extraction unit 146, A 15 Hz correction signal generation unit 181, a 135 Hz correction signal generation unit 182, a DC correction signal generation unit 183, a signal correction unit 170, a correction limit setting unit 160, a radiation signal correction unit 150, A synthesis unit 185 and a correction signal output selection unit 135.

The plurality of radiators 110 are arranged on the electronic takan antenna at an equal interval as an entire circle, and are antenna element elements that radiate 15-Hz and 135-Hz signals on a carrier wave of high frequency (1 GHz) and radiate. Therefore, the signal radiated from the radiator 110 is a composite signal of a 1 GHz signal, a 15 Hz signal, and a 135 Hz signal, as is known to those skilled in the art prior to the filing of the present invention.

As shown in FIG. 1, it is preferable that the radiator 110 is composed of 36 pieces, which are circularly formed at intervals of 10 degrees.

The plurality of monitoring signal detectors 120 are provided in a one-to-one correspondence with the plurality of radiators 110, detect a part of the radiation waves radiated from each radiator 110 as monitoring signals, And is fed back to the selection unit 130.

The monitoring signal detector 120 detects a very weak signal of, for example, about 0.1 to 1% of the total power of the radiation wave radiated from the radiator 110, and thus, even if the monitoring signal detector 120 is adopted, There is no problem in signal transmission / reception between aircraft and aircraft.

If the number of the radiators 110 is 36 as in the example shown in FIG. 1, the number of the monitoring signal detector 120 should also be 36.

The monitoring signal detector 120 may be formed of, for example, an RF splitter.

The monitoring signal input selection unit 130 selects the monitoring signal input from the control angle timing generating unit 170 from among the monitoring signals of the number of the radiators 110 fed back from the monitoring signal detecting unit 120 And outputs only the selected monitoring signal to the amplifying unit 141. The amplifying unit 141 outputs the monitoring signal to the amplifying unit 141,

FIG. 5 is a conceptual diagram of a radiation angle. The radiation angle itself of the electronic type Takan antenna is a known technology before the application of the present invention, and is briefly described.

As shown in the embodiment of FIG. 1, when 36 radiators 110 are provided, each radiator 110 is disposed at intervals of 10 degrees, and an angle of 10 degrees formed by a plurality (36 radiators) (0 °, 10 °, 20 °, ...., 350 °) as many as the number (36) of the radiation angles (I.e., an area of a radiation angle of 20 [deg.], ...., an area of a radiation angle of 350 [deg.]), Radiation waves radiated from 36 radiators 110 (i.e., 36 radiation waves) exist.

The monitoring signal detector 120 detects a monitoring signal for each of the radiation waves radiated from the 36 radiators 110 and feeds the monitoring signal to the monitoring signal input selector 130. The monitoring signal input selector 130 selects 36 feedback signals When the signal corresponding to the current radiation angle value among the monitoring signals, for example, the current radiation angle value is 10 °, the second radiator 110 matching the 10 ° region selects the feedback signal.

Since the control angle timing generator 170 sequentially outputs all of the 36 radiation angles as a current radiation angle value (sequentially from 0 to 350 degrees), the monitoring signal input selector 130 also changes from 0 to 350 Of the first radiator is clockwise radiated from the 36th radiator to select the monitoring signal to be fed back.

The amplification unit 141 amplifies or reduces the monitoring signal selected and output by the monitoring signal input selection unit 130.

The peak extractor 142 extracts a peak value of a monitoring signal (which is itself a pulse signal) amplified by the amplifier 141.

The ADC 143 converts the peak value of the pulse signal extracted by the peak extracting unit 142 into a digital signal.

The DFT unit 145 converts a discrete time domain signal into a discrete frequency domain by performing a discrete Fourier transform on a monitoring signal converted into a digital signal by the ADC 143, And generates an amplitude column and a phase column according to amplitude and phase, that is, a frequency value.

The amplitude and phase extraction unit 146 extracts an amplitude value corresponding to the DC component (0 Hz), 15 Hz, and 135 Hz (amplitude value of the DC component, amplitude value of 15 Hz, amplitude of 135 Hz And extracts a phase value corresponding to 15 Hz and 135 Hz from the upper row generated by the DFT unit 145.

Since the frequency of the signal requiring actual calibration is three of DC (0Hz), 15Hz and 135Hz, it is necessary to measure the amplitude value and the phase value for these three frequencies, that is, in the monitoring signal corresponding to the current radiation angle value 15Hz, 135Hz, and DC components of the signal.

The control angle timing generator 170 sequentially generates a radiation angle value (0 to 350 degrees in the case of 36 as described above) corresponding to each of the plurality of radiators 110, The radiation angle value is output to the monitoring signal input selection unit 130 and the correction signal output selection unit 135 and the correction value calculation module 155 of the radiation signal correction unit 150 at a predetermined interval.

The correction limit setting unit 160 is a user interface for inputting the correction limit value? Zs.

When the current radiation angle value is received from the control angle timing generating unit 170, the radiation signal correcting unit 150 corrects the amplitude value and the phase value for each frequency of the current monitoring signal received from the amplitude and phase extracting unit, A current threshold value and a current emission angle value based on a standard value of the amplitude and phase stored in the inside and a threshold value stored in the inside and a correction threshold value [Delta] Zs input from the correction limit setting unit 160 And the calculated correction value is added to the amplitude and phase value for each frequency of the monitoring signal corresponding to the current radiation angle value.

The radiation signal correcting unit 150 includes a correction limit storing module 151, a monitoring value storing module 152, a standard value storing module 153, a correction value calculating module 155 and a correction executing module 156 .

The correction limit storage module 151 is a memory that stores the correction limit value input from the correction limit setting unit 160. [

The monitoring value storage module 152 stores the measured value of the current monitoring signal fed back, that is, the amplitude value and the phase value for 15 Hz, 135 Hz, and DC (0 Hz) input from the amplitude and phase extraction unit 146 Memory.

The standard value storage module 153 stores standard values of amplitude and phase for each of the radiation angles (0 °, 10 °, ..., 350 °) by frequency (0Hz, 15Hz, and 135Hz).

The correction value calculating module 155 calculates the correction value based on the angular frequency (15 Hz, 135 Hz, 0 Hz) of the current monitoring signal stored in the monitoring value storage module 152 when receiving the current radiation angle value from the control angle timing generator 170, Reads a star amplitude and a phase value (hereinafter referred to as a "monitoring value"), reads a standard value of the amplitude and phase of each frequency in the current radiation angle value stored in the standard value storage module 153 , Reads the correction limit value stored in the correction limit storage module 151, compares the phase value and the amplitude value [monitoring value] of each frequency of the current monitoring signal with the size of the threshold value, The difference [DELTA Z1] between the monitoring value and the standard value is set as the preliminary correction value and the monitoring value is compared with the threshold value. If the monitoring value is larger than the threshold value, the difference value (DELTA Z2) The preliminary correction values? Z1 and? Z2 are set to the preliminary correction values and the preliminary correction values? Z1 and? Z2 are compared with the correction threshold value? Zs stored in the correction limit storage module 151, Value? Zs, the preliminary correction value is selected as the correction value, and when the preliminary correction value is larger than the correction limit value, the correction limit value is selected as the correction value.

The correction value calculating module 155 may be configured to be programmable as shown in FIG. 4 or hardware.

The correction execution module 156 performs a function of adding the correction values of the amplitude and phase for each frequency calculated by the correction value calculation module 155 to the monitoring values on a frequency-by-frequency basis.

That is, the correction execution module 156 sums the amplitude value of the monitoring signal of 15 Hz and the amplitude correction value of 15 Hz calculated by the correction value calculation module 155, and outputs the phase value of the monitoring signal of 15 Hz and the correction value calculation module 155) of the phase correction value of 15 Hz.

The amplitude value of the monitoring signal of 135 Hz and the amplitude correction value of 135 Hz calculated by the correction value calculation module 155 are added together and the phase value of the monitoring signal of 135 Hz and the phase correction value of 135 Hz calculated by the correction value calculation module 155 And adds the amplitude value of the monitoring signal of the DC component (0 Hz) and the amplitude correction value of the DC component (0 Hz) calculated by the correction value calculation module 155 in the same manner.

The 15 Hz correction signal generator 181 receives the corrected 15 Hz amplitude value and the corrected 15 Hz phase value after the summing is performed by the correction execution module 156 from the correction execution module 156 and generates a correction signal of 15 Hz For example, as shown in Equation (1).

: Corrected 15 Hz signal, A: corrected amplitude of 15 Hz signal, f: 15 Hz, t: sec, γ: 15 Hz phase offset

The 135 Hz correction signal generator 182 receives the corrected 135 Hz amplitude value and the corrected 135 Hz phase value after the summing is performed by the correction execution module 156 from the correction execution module 156 and generates a correction signal of 135 Hz For example, as shown in Equation (2).

: Corrected 135 Hz signal, B: corrected amplitude of 135 Hz signal, H: 135 Hz phase offset

The DC correction signal generator 183 is configured to generate a DC correction signal by receiving the corrected DC amplitude value after the summing is performed by the correction execution module 156 from the correction execution module 156. [

The signal synthesizer 185 has a configuration for converting the signals output from the 15 Hz correction signal generator 181, the 135 Hz correction signal generator 182, and the DC correction signal generator 183 into analog signals and then synthesizing them Can be expressed as Equation (3).

k: DC offset

The correction signal output selection unit 135 controls the output of the corrected sinusoidal signal output from the signal synthesis unit 185 to the radiator 110 corresponding to the current radiation angle value received from the control angle timing generation unit 170 .

Meanwhile, in the electronic tag antenna having the real-time correction function according to an embodiment of the present invention, the monitoring value storage module 152 receives a new amplitude value and a phase value from the amplitude and phase extraction unit 146 The previous monitoring value storage module 152-1 stores the previous monitoring value received from the monitoring value storage module 152. The previous monitoring value storage module 152-1 stores the previous monitoring value received from the monitoring value storage module 152, ) Of the first and second electrodes.

At this time, the correction value calculation module 155 uses the comparison value between the monitoring value storage module 152 and the previous monitoring value storage module 152-1 to compute the amplitude and phase by comparing the current value and the previous value, Can be increased.

In the electronic type antenna having the real-time correction function according to the embodiment of the present invention, the threshold value may be stored in the correction value calculation module, or a threshold value input unit (not shown) may be separately configured, A threshold value is input by an input unit and a threshold value input by the threshold value input unit (not shown) is stored in a threshold value storage module (not shown), and the correction value calculation module calculates a current radiation angle value A threshold value stored in the threshold value storage module may be read. In any case, the present invention belongs to the technical scope of the present invention.

The operation of the electronic type Takan antenna provided with the real-time correction function according to one embodiment of the present invention having the above-described structure will be described below.

The 36 radiators radiate composite signals of signals of 15 Hz, 135 Hz and 1 GHz, respectively. The 36 monitoring signal detectors 120 detect part of the radiation waves radiated from the radiators 110 as monitoring signals, To the monitoring signal input selection unit 130.

The monitoring signal input selection unit 130 selects one of the 36 monitoring signals fed back from the monitoring signal detection unit 120 and that matches the current radiation angle value (for example, 0 degrees) received from the control angle timing generation unit 170 And radiates from the radiator 110 (that is, the radiator 110 positioned at 0 °) to select the feedback signal and outputs only the selected monitoring signal to the amplification unit 141.

The amplifying unit 141 amplifies the monitoring signal selected by the monitoring signal input selecting unit 130 and outputs the monitoring signal (the monitoring signal corresponding to the current radiation angle value of 0 degrees), and the peak extracting unit 142 amplifies the monitoring signal The ADC 143 converts the peak value of the extracted pulse signal into a digital signal, and the DFT unit 145 performs discrete Fourier transform on the input signal An amplitude column and a phase column are generated according to a frequency value, and as a result, an amplitude value and a phase value in all frequency bands are generated.

The amplitude and phase extraction unit 146 extracts amplitude values corresponding to the DC components (0 Hz), 15 Hz, and 135 Hz among the amplitude values in all the frequency bands, and extracts the phase values of 15 Hz and 135 Hz And sends the extracted amplitude value and phase value to the monitoring value storage module 152 for storage.

The control angle timing generator 170 outputs the current radiation angle value to the correction value calculating module 155. The correction value calculating module 155 receives the current radiation angle value and outputs the following values The correction value is calculated by an algorithm.

The correction value calculating module 155 calculates the amplitude of each frequency (15 Hz, 135 Hz, 0 Hz) of the current monitoring signal stored in the monitoring value storing module 152 when the current radiation angle value (0 ° in the above example) And reads a standard value (assuming an amplitude standard value of 15 Hz is 0.8) of frequency-specific amplitude and phase at the current radiation angle value (0 deg. In the above example) stored in the standard value storage module 153, The correction limit value stored in the correction limit storage module 151 (for example, assuming that the correction limit value of the amplitude of 15 Hz is 0.2) is read (S412).

Next, the phase value and the amplitude value (i.e., monitoring value) of each frequency of the current monitoring signal are compared with the threshold value (assuming a threshold value of amplitude of 15 Hz to be 1.0) (S414).

If the monitored value of the size comparison result in step S414 is less than or equal to the threshold value (e.g., the amplitude value of 15 Hz stored in the monitoring value storage module 152 is 0.5 and the threshold is 1.0 as described above), the monitoring value ) And a standard value (0.8, described above) as a preliminary correction value (S419, S420).

If the monitoring value is larger than the threshold value (e.g., the measured value of the amplitude of 15 Hz is 1.2 and the threshold value is 1.0 as described above) (S414), the measured value Value) is skipped and the difference (DELTA Z2 = 0.2) between the threshold value (1.0) and the standard value (0.8) is set as the preliminary correction value (S418, S420).

When the measured value is larger than the threshold value, the measured value is skipped without calculating the corrected value immediately on the basis of the measured value, and the corrected value So that the risk of the case where the correction value is calculated on the basis of the suddenly changed measurement value can be avoided and the reliability of the correction can be secured.

The preliminary correction values? Z1 and? Z2 calculated as described above are compared with the correction limit value? Zs stored in the correction limit storage module 151 (S422).

If the preliminary correction value DELTA Z2 is 0.2 and the preliminary correction value DELTA Z2 is equal to or smaller than the correction limit value DELTA Zs = 0.2 (S422) as in the above example, the preliminary correction value DELTA Z2 = S424), so that the correction value in this case becomes (-) 0.2.

On the other hand, if the preliminary correction value? Z1 is 0.3 and the preliminary correction value? Z1 is larger than the correction threshold value? Zs = 0.2 in the above example, the preliminary correction value? Z1 = 0.3 is skipped The correction limit value 0.2 is selected as the correction value (S426), and in this case, the correction value becomes (+) 0.2.

In the case where the preliminary correction value exceeds the correction limit value by comparing the preliminary correction value and the correction limit value, the preliminary correction value is skipped and the correction limit value is selected as the correction value, If the value is not directly based on the correction value but is larger than the correction limit value by comparison with the correction limit value, the correction limit value is selected as the correction value so as to prevent the possibility of error in the azimuth measurement due to the abrupt change So that the reliability of the error correction can be improved.

The correction value calculated by the correction value calculation module 155 is corrected for each frequency by the correction execution module 156, that is, the correction execution module 156 calculates the amplitude and phase Is added to the monitoring value for each frequency.

For example, when the amplitude value of the monitoring signal at 15 Hz is 0.3 as in the above example, the amplitude correction value is (+) 0.2, and the amplitude correction value 0.2 is added to the measured amplitude value 0.3 to obtain a corrected amplitude value of 0.5 .

(Subtracts or adds) the phase value of the monitoring signal of 15 Hz and the phase correction value of 15 Hz calculated by the correction value calculating module 155.

The amplitude value and the phase value corrected by the summation (addition or subtraction) as described above are supplied to the 15 Hz correction signal generation unit 181, the 135 Hz correction signal generation unit 182, and the DC correction signal generation unit 183, The 15 Hz correction signal generation section 181, the 135 Hz correction signal generation section 182, and the DC correction signal generation section 183 generate correction signals based on the correction values (the corrected amplitude values and the phase values) (See Equations 1, 2 and 3)

The signal synthesis unit 185 converts the signals output from the 15 Hz correction signal generation unit 181, the 135 Hz correction signal generation unit 182, and the DC correction signal generation unit 183 into analog signals and then synthesizes them (See Equation 3).

Next, the correction signal output selection unit 135 outputs the corrected sine-wave signal (see Equation 3) output from the signal synthesis unit 185 to the current radiation angle value (0 in the above example) To the radiator 110 (first radiator) corresponding to the angle?

At the radiator 110 disposed at 0 °, a radiation wave whose amplitude and phase are corrected is radiated.

If the amplitude and the phase value are compensated for by the correction value for the feedback signal as described above, a value with less error will be measured at the next rotation, and a smaller error will be applied at the next rotation. The error will gradually decrease and eventually the antenna rotation will be repeated and the radiation will be emitted with the amplitude value and the phase value close to the standard value.

The electronic takan antenna provided with the real-time correction function according to an embodiment of the present invention is exemplified as being composed of 36 radiators 110 provided at intervals of 10 degrees, but the present invention is not limited thereto, And the number of the monitoring signal detecting units 120 is 18, the present invention is also applicable to the technical scope of the present invention.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is self-evident to those who have.

Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

110: radiator 120: monitoring signal detector
130: monitoring signal input selection unit 135: correction signal output selection unit
141: Amplification unit 142: Peak extraction unit
143: ADC 145: DFT unit
146: Amplitude and phase extraction unit 150: Radiation signal correction unit
151: correction limit storage module 152: monitoring value storage module
153: standard value storage module 155: correction value calculation module
156: correction execution module 160: correction limit setting section
170: Control angle timing generator 181: 15 Hz correction signal generator
182: a 135 Hz correction signal generation unit 183: a DC correction signal generation unit
185:

Claims

A Tactical Air Navigation (TACAN) antenna comprising:
A plurality of radiators (110) radiating radio waves of signals of 15 Hz and 135 Hz so as to form circular arrangements at equal intervals on the electronic takan antennas;
The plurality of radiators 110 are provided in a one-to-one correspondence with each other. The plurality of radiators 110 detect a part of the radiation waves radiated from the radiators 110 as monitoring signals and feed back the detected monitoring signals to the monitoring signal input selection unit 130. A monitoring signal detection unit 120;
A monitoring signal of the radiator 110 matching the current radiation angle value received from the control angle timing generating unit 170 is selected from the monitoring signals of the number of the radiators 110 fed back from the monitoring signal detecting unit 120 A monitoring signal input selection unit 130 for outputting only the selected monitoring signal;
An amplifying unit 141 for amplifying a monitoring signal selected and output by the monitoring signal input selecting unit 130;
A peak extractor 142 for extracting a peak value of the monitoring signal amplified by the amplifier 141;
An ADC 143 for converting the peak value extracted by the peak extractor 142 into a digital signal;
The monitoring signal converted into the digital signal by the ADC 143 is converted into a discrete frequency domain by discrete Fourier transform to convert the discrete time domain signal into an amplitude column in the frequency domain of the monitoring signal, And a DFT unit 145 for generating a phase column.
(0 Hz), 15 Hz, and 135 Hz from the amplitude string generated by the DFT unit 145 and outputs a phase value corresponding to 15 Hz and 135 Hz in the upper row generated by the DFT unit 145 An amplitude and phase extraction unit 146 for extracting the amplitude and phase of the received signal;
And sequentially generates the radiation angle values corresponding to the plurality of radiators 110 and outputs the generated plurality of radiation angle values to the monitoring signal input selection unit 130 and the correction signal output selection unit 135 and the correction value calculating module 155 of the radiation signal correcting unit 150;
A correction limit setting unit 160 that is a user interface for inputting a correction limit value [Delta] Zs;
A correction limit storage module 151 for storing the correction limit value input from the correction limit setting unit 160,
A monitoring value storage module 152 for storing amplitude values and phase values for 15 Hz, 135 Hz, and DC components (0 Hz) input from the amplitude and phase extraction unit 146,
A standard value storage module 153 storing standard values of amplitude and phase for each radiation angle and each frequency (0 Hz, 15 Hz, and 135 Hz)
When receiving the current radiation angle value from the control angle timing generator 170, the amplitude value and the phase value (hereinafter referred to as "monitoring value") of each frequency of the current monitoring signal stored in the monitoring value storage module 152 Reads the standard value of the amplitude and phase for each frequency stored in the standard value storage module 153 and reads the correction limit value stored in the correction limit storage module 151, If the monitoring value is less than the threshold value, the difference value [ΔZ1] between the monitoring value and the standard value is set as the preliminary correction value. If the monitoring value is larger than the threshold value, And sets the differential value [Delta] Z2 between the threshold value and the standard value as the preliminary correction value. The preliminary correction values [Delta] Z1 and [Delta] When the preliminary correction values? Z1 and? Z2 are equal to or less than the correction threshold value? Zs, the preliminary correction value is selected as the correction value. If the preliminary correction value is larger than the correction threshold value A correction value calculation module 155 for skipping the preliminary correction value and selecting the correction limit value as a correction value,
15 Hz and the amplitude correction value of 15 Hz calculated by the correction value calculation module 155 and outputs the phase value of the monitoring signal of 15 Hz and the phase value of the monitoring signal of 15 Hz and the phase correction value of 15 Hz calculated by the correction value calculation module 155 And adds the amplitude value of the monitoring signal of 135 Hz and the amplitude correction value of 135 Hz calculated by the correction value calculation module 155 to calculate the phase value of the monitoring signal of 135 Hz and the phase value of the monitoring signal of 135 Hz (0 Hz) of the monitoring signal of the DC component (0 Hz) and the amplitude correction value of the DC component (0 Hz) calculated by the correction value calculation module 155 (150);
A corrected 15 Hz amplitude value obtained by adding the amplitude correction value of 15 Hz to the amplitude value of the monitoring signal of 15 Hz and a corrected 15 Hz phase value obtained by adding the phase correction value of 15 Hz to the phase value of the monitoring signal of 15 Hz, A 15-Hz correction signal generation unit 181 for receiving a 15-Hz correction signal from the 15-Hz correction signal generation unit 156;
A 135 Hz amplitude value corrected by adding the amplitude correction value of 135 Hz to the amplitude value of the monitoring signal of 135 Hz and a 135 Hz phase value corrected by adding the phase correction value of 135 Hz to the phase value of the monitoring signal of 135 Hz, A 135 Hz correction signal generation unit 182 that receives the correction signal and generates a correction signal of 135 Hz;
A DC correction signal generator 183 for receiving a DC amplitude value corrected by adding the amplitude correction value of the DC component to the amplitude value of the DC component monitoring signal from the correction execution module 156 to generate a DC correction signal;
A signal synthesizer 185 for converting the signals output from the 15 Hz correction signal generator 181, the 135 Hz correction signal generator 182, and the DC correction signal generator 183 into analog signals and synthesizing them;
A correction signal output selecting unit 135 for controlling the output of the corrected signal output from the signal synthesizing unit 185 to the radiator 110 corresponding to the current radiation angle value received from the control angle timing generating unit 170 Wherein the antenna is configured to include at least a first antenna and a second antenna.

The method according to claim 1,
And a previous monitoring value storage module 152-1 for storing previous monitoring values received from the monitoring value storage module 152,
When receiving the new amplitude value and phase value from the amplitude and phase extraction unit 146, the monitoring value storage module 152 stores the previously stored amplitude value and phase value into the previous monitoring value storage module 152-1 Wherein the first antenna and the second antenna are electrically connected to each other.

The method according to claim 1,
Wherein the radiator (110) is provided in a circular shape at intervals of 10 [deg.], And the monitoring signal detector (120) has 36.

The method according to claim 1,
Wherein the radiator (110) is provided in a circular shape at intervals of 20 degrees, and the monitoring signal detector (120) is 18.