KR940011015B1 - Multiband radar detector - Google Patents

Abstract

The radar detecting device compounds an intermediate frequency through a horn antenna (1) and intermediate band amplifiers (4) and a frequency generated by the local oscillators (6)(7) for two intermediate bands. The device also amplifies a demodulated signal through a filter (8) and a FM detector (9), selects an intermediate band according to the amplified output signal, generates a clock pulse, and executes a local oscillator (6) or (7) selected by a band selection switching module (12).

Description

3-band radar detector

1 is a system configuration diagram of a conventional radar detector.

2 is an input / output waveform diagram of each part of FIG. 1, (a) is a clock pulse waveform diagram output from a microcomputer, and (b) is an output waveform diagram of a triangular pulse generator.

3 is a system configuration diagram of the three-band radar detector of the present invention.

4 is a waveform diagram of the temporary axial force of FIG. 3, (a) is an output waveform diagram of the pulse generator, (b) is an output waveform diagram of the triangular pulse generator, and (c) is an output waveform diagram of the second amplifier. , (d) is an output waveform diagram of the band selector, (e) is an output waveform diagram of the band selector switching unit.

5 is an output waveform diagram of an FM detector of FIG.

* Explanation of symbols for main parts of the drawings

1: Horn antenna 2: Ultra short mixing part

3: Ultra Short Sweep Oscillator 4: Middle Band Amplification

5: middle band mixing section 6, 7: first and second intermediate band local oscillating section

8 filter unit 9 FM detector

10, 10 ': first and second amplifier 11 11: band selector

12 band switching unit 13 clock generator

The present invention relates to a radar detector, and in particular, two intermediate band local oscillators are automatically selected and adjusted according to a frequency band detected from a three-band horn antenna, thereby delaying the time and middle band locality generated during radar detection. The present invention relates to a three-band radar detector for preventing oscillation and malfunction due to interference of the oscillator.

Conventional three-band radar detector is a three-band horn antenna (100) for receiving ultra-high frequency energy of any X-band, K-band, and Ka-band, as shown in Figure 1 attached to the overall system of the radar detector A microprocessor 111 for controlling an operation and generating a clock pulse signal, a triangular pulse generator 103 for converting a clock pulse signal generated from the microprocessor 111 into triangular pulses, and outputting the triangular pulses; Ultrasonic sweep local oscillator 102 for varying and outputting the oscillation frequency according to the triangular pulse signal generated from the pulse generator 103, and a high frequency signal for each band received from the three-band horn antenna 100 and An ultra-short mixing unit 101 which detects an intermediate frequency signal by mixing a local oscillation frequency generated from the ultra-short sweep local oscillating unit 102 and the intermediate frequency signal detected by the ultra-short mixing unit 101 are first. And an intermediate band amplifier 104 for amplifying and outputting a predetermined level through the second amplifiers 104a and 104b and oscillating output at a frequency of an X band selected according to a control signal output from the microprocessor 111. A first intermediate band local oscillator 106, a second intermediate band local oscillator 107 for oscillating and outputting at frequencies of a K band and a Ka band selected according to a control signal of the microprocessor 111, and the selected first And an intermediate band mixing unit 105 for mixing and outputting the intermediate band local oscillation frequency of the second intermediate band local oscillator 106 and 107 and the intermediate frequency signal amplified by the intermediate band amplifier 104 and the intermediate band local oscillation frequency. A filter unit 108 for filtering the intermediate frequency signal mixed by the band mixing unit 105 to 10.7 MHz, an FM detector 109 for demodulating the frequency-modulated intermediate frequency signal through the filter unit 108, The demodulated signal from the FM detector 109 to a predetermined level; The amplifying unit 110 is wide and input to the microprocessor 111, and the alarm unit 112 to inform the information by the output control signal of the microprocessor 111 according to the level of the signal amplified from the amplifying unit 110 It consists of).

The three-band horn antenna 100 of the conventional radar detector configured as described above receives ultra-high frequency energy of an arbitrary X-band, K-band, or Ka-band and inputs it to the ultra-short mixing unit 101.

At this time, the microprocessor 111 generates the same clock pulse signal as the 2a diagram after the program execution time T3 as the second diagram and inputs it to the triangular wave generator 103, and the triangular wave pulse generator 103 is input. The converted clock pulse signal is converted into a triangular pulse signal as shown in FIG. 2b and input to the first sweep local oscillator 102. The ultra sweep sweep local oscillator 102 is in accordance with the triangular pulse signal input from the triangular pulse generator 103. The frequency is changed and input to the ultra-short mixing unit 101.

Therefore, the ultra short mixing unit 101 mixes the ultra high frequency signals of the X band, the K band or the Ka band received from the horn antenna 100 with the local oscillation frequency oscillated from the ultra short sweep local oscillator 102 to generate an intermediate frequency signal. The detected intermediate frequency signal is amplified to a predetermined level through the first amplifier 104a and the second amplifier 104b of the intermediate band amplifier 104 and input to the intermediate band mixer 105.

Accordingly, the intermediate band mixing unit 105 is a first intermediate band local oscillator 106 and 107 selectively driven according to the intermediate frequency signal amplified by the intermediate band amplifier 104 and the control signal of the microprocessor 111. After mixing the local oscillation frequency of the X band and the second intermediate band local oscillator 107 of the K band or Ka band and then filter the mixed frequency to 10.7MHz through the filter unit 108 to detect the FM detector 109. The FM detector 109 demodulates the frequency-modulated signal through the filter unit 108 and amplifies the demodulated signal to a predetermined level through the amplifier unit 110. Will be entered.

Therefore, the microprocessor 111 determines whether the band detected by the 3-band horn antenna 100 is an ultra-high frequency signal of the X band, the K band, or the Ka band according to the signal amplified by the amplifier 110, and then the band. And select and drive the first intermediate band oscillator 106 for outputting the local oscillation frequency of the X band or the second intermediate band local oscillator 107 for outputting the local oscillation frequencies of the K and Ka bands. According to the signal level input from the amplifying unit 110 determines that the distance to the signal source is close to inform the user through the alarm unit 112.

That is, as the distance from the signal source increases, the output signal level of the amplifier 110 increases, so that the microprocessor 111 provides the user with the necessary information at a high speed through the alarm unit 112. Will be.

However, such a conventional radar detector uses a microprocessor to improve oscillation and malfunction due to interference of two intermediate band local oscillators. This is because the microprocessor executes a program as shown in FIG. It takes time and does not detect the very high frequency energy of the signal source during the time of executing the program. Also, the microprocessor controlling the midband local oscillator is suitable for the multifunctional radar detector, but the price is increased in the low cost radar detector. It became a factor to let.

Accordingly, an object of the present invention is to automatically select and adjust two intermediate band local oscillators according to a frequency band detected from a three-band horn antenna, and to change the sweep time so that the delay of the time generated during radar detection and the interference of the intermediate band local oscillator The present invention provides a three-band radar detector for quickly transmitting information to a user by preventing noise when there is an oscillation, a malfunction, and a signal caused by a signal.

The object of the present invention is to amplify the demodulated signal through the filter unit and the FM detector after mixing the intermediate frequency signal detected by the horn antenna and the intermediate band amplification process and the local oscillation frequency according to the band in the intermediate band mixer. A first and second amplifiers, a band selector for selecting an intermediate band according to the presence or absence of a signal output from the second amplifier, a clock generator for generating a clock pulse signal of a predetermined level, and the band selector This is achieved by configuring a band selection switching unit for selectively driving the first and second incremental band local oscillators according to the signal level output from the unit and the pulsation of the claw generating unit. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Same as

3 is a configuration diagram of a three-band radar detector system of the present invention, and as shown therein, a three-band horn antenna 1 for receiving ultra-high frequency energy of arbitrary transmitted X-band, K-band, and Ka-band; A clock generator 13 for generating a cyclic pulse signal of a predetermined period, a triangular pulse generator 14 for converting a clock pulse signal generated from the clock generator 13 into a triangular pulse, and outputting the triangular pulse; Ultra-short sweep local oscillator 3 for changing and outputting oscillation frequency according to triangular pulse signal generated from generator 14 and high frequency signal and ultra-short for each band received from the 3-band horn antenna 1 The first and second amplifiers may include an ultrashort mixing section 2 that detects an intermediate frequency signal by mixing local oscillation frequencies generated by the sweep local oscillating section 3 and an intermediate frequency signal detected by the ultrashort mixing section 2. Amplification to a predetermined level via 4a) (4b) An intermediate band amplifier 4, a band select switching unit 12 for generating control clock pulses according to the clock pulse signal generated from the clock generator 13, and the band select switching unit 12 The first intermediate band local oscillator 6 for selective driving according to the control clock pulse and oscillating output at the frequency of the X band, and the selective driving by the switching switching of the band selective switching unit 12 to the frequency of the K band and the Ka band. A second intermediate band local oscillator (7) for oscillating output, and amplified by the intermediate band local oscillation frequency and the intermediate band amplifier (4) of the selected first and second intermediate band local oscillators (6) (7). An intermediate band mixing section 5 for mixing and outputting intermediate frequency signals, a filter section 8 for filtering the intermediate frequency signals mixed in the intermediate band mixing section 5 at 10.7 MHz, and the filter section 8 FM detector 9 for demodulating the frequency-modulated intermediate frequency signal through From the first and second amplifiers 10 and 10 'for amplifying and demodulating the signal demodulated from the FM detector 9 to a predetermined level, and from the first and second amplifiers 10 and 10, respectively. A band selector 11 which is switched according to whether or not the amplified signal is selected and selects an intermediate band of the first and second intermediate band national oscillator 6 and 7 through the band select switch 12; An oscillation frequency of a predetermined level is generated according to the oscillation frequency of the first oscillator 15 and the first oscillator 15 that oscillate according to the level of the signal amplified by the first and second amplifiers 10 and 10 '. An output second oscillator 16, an audio alarm 17 for driving information according to the oscillation frequency of the second oscillator 16, and providing information to the user; and an oscillation frequency of the first oscillator 15 In accordance with the driving LED driver 18 and the output signal of the LED driver 18 is a power meter to display the distance to the signal source at a power level (Stlength Meter) The.

The band select switching unit 12 is configured as a JK flip-flop in order to match the synchronization between the first and second intermediate band local oscillator 6 and 7 and the synchronization with the first sweep local oscillator. The band selector 11 receives a signal from the second amplifier 10 'and configures a multivibrator to select a band by adjusting the band select switch 12.

The operation and effects of the present invention configured as described above will be described in detail with reference to FIGS. 4 and 5.

The three-band horn antenna 1 receives ultra-high frequency energy of an arbitrary X band, K band or Ka band and inputs it to the ultra-short mixing unit 2.

At this time, the clock generator 13 generates a clock pulse signal having a predetermined period as shown in FIG. 4a and inputs it to the triangular wave generator 14, and the triangular arm pulse generator 14 inputs the input clock pulse signal to the fourth pulse. It converts into a triangular pulse signal such as a degree and inputs it to the ultra-short sweep local oscillator 3, and the ultra-short sweep local oscillator 3 is X-band and K-band according to the level of the triangular pulse signal input from the triangular pulse generator 14. The local oscillation frequency of the Ka band is input to the ultra-short mixing unit 101.

At this time, there are three bands of X band, K band, and Ka band. The frequency of the X band is 10.525 kHz, the K band has a frequency of 24.150 kHz, and the Ka band has a frequency of 34.300 kHz.

Accordingly, the ultra-sweep local oscillator 3 is 11.64 ㎓ to 11.72 X of the X band and 23.28 ㎓ to 23.44 의 and 11.64 of the K band, which is a multiple thereof, depending on the level of the triangular wave pulse signal generated by the triangular wave generator 14. A local oscillation frequency having an ultra-short bandwidth of 34.92 kHz to 35.16 kHz of the Ka band, which is a multiple of ㎓ to 11.72 kHz, is input to the ultra-short mixing section 2.

The ultra-short mixing unit 2 is an X-band, K-band or Ka-band ultra-high frequency signal detected by the horn antenna (1) using the Harmonic frequency and the X-band, K oscillated from the ultra-sweep local oscillator (3) After mixing the local oscillation frequency of the band or Ka band, the intermediate frequency signal is detected.

As an example, if the frequency of 1.525 kHz X band is detected from the horn antenna 1, the ultra-short mixing section 2 is 11.64 kHz to 11.72 kHz, which is the local oscillation frequency of the X band generated by the ultra-short sweep local oscillation section 3; Subtracting W and subtracting 1.115 kHz to 1.195 kHz having an intermediate band into the middle band amplifying section 4, and when the frequency (24.150 kHz) of the K band is detected from the horn antenna 1, the ultra-short sweep local oscillating section 3 Subtracts 23.28 kHz to 23.44 kHz, which is the local oscillation frequency of the K band, and inputs 0.87 kHz to 0.71 kHz with the intermediate band into the middle band amplifying section 4, and detects 34.300 kHz in the Ka band. The intermediate frequency and the intermediate frequency of 0.62 kHz to 0.86 kHz having the intermediate band are input to the middle band amplifier 4 by subtracting 24.92 kHz to 35.16 kHz, which is the frequency of the Ka band generated from the ultra short sweep local oscillator 3. .

The intermediate frequency signal detected by the ultra short mixing section 2 is amplified to a predetermined level by the first amplifier 4a and the second amplifier 4b of the intermediate band amplifier 4, and then the intermediate band mixing section 5 ) Is entered.

Accordingly, the intermediate band mixing section 5 is a first intermediate section which is selectively driven by the band selection switching section 12 which generates the intermediate frequency signal amplified from the intermediate band amplifying section 4 and the same clock pulse as the 4e degree. The local oscillation frequency of the X band of the band local oscillation section 6 and the K band or Ka band of the second intermediate band local oscillation section 7 are mixed, and the mixed frequency is filtered to 10.7 MHz through the filter section 8 to FM. It is input to the detector 9.

The FM detector 9 demodulates the frequency-modulated signal through the filter unit 8 into the same signal as the fifth degree, and then decodes the demodulated signal through the first and second amplifiers 10 and 10 '. The first and second amplifiers 10 and 10 'are detected by the FM detector 9, i.e., the horn antenna 1 is the band of the signal source. Is detected, the high signal as shown in FIG. 4C is output and input to the band selector 11 configured as a multivibrator.

Therefore, the band selector 11 outputs the low signal of the 4d degree when the high signal of the fourth degree is output from the second amplifier 10 'and then selects the band selector switch 12 of JK flip flop. And the band select switching unit 12 oscillates to the X band, the K band or the Ka band according to the output signal of the band selector 11, that is, the detected band. The oscillation column 6, 7 is selected and fixed.

In addition, the first oscillator 15 and the second oscillator 16 drive the alarm unit 17 according to the signal level input from the first and second amplification units 10 and 10 ′ to provide information to the user. Will be provided.

Meanwhile, as the first oscillator 15 is driven, the LED driver 18 displays the distance from the signal source through the strength meter 19.

As described above, according to the present invention, there is no delay in time by automatically selecting and adjusting two intermediate band local oscillators directly according to a frequency band detected from a three-band horn antenna. When oscillation, malfunction and signal are caused by interference of band local oscillator, noise can be removed to provide information to user quickly.

Claims (3)

First and second amplifying the demodulated signal through the filter unit and the FM detector after mixing the intermediate band local oscillation frequency in the intermediate band mixing section according to the intermediate frequency signal and the band detected through the horn antenna and the intermediate band amplification process An amplifying section 10, 10 ', a band selecting section 11 for selecting an intermediate band depending on the presence or absence of a signal output from the second amplifying section 10', and the band selecting section 11; A predetermined period of clock pulses to the band select switching unit 12 for selectively driving the first and second intermediate band local oscillator 6 and 7 according to the signal level output from the The clock generator 13 and the first oscillator 15 and the first oscillator 15 that oscillate according to the level of the signal amplified by the first and second amplifiers 10 and 10 '. According to the oscillation frequency, the oscillation frequency of the second oscillation unit 16 for outputting the oscillation frequency of a predetermined level and the second oscillation unit 16 Audio alarm unit 17 to drive the information according to the oscillation frequency of the first oscillation unit 15, the audio alarm unit 17 to provide information to the user, and the power according to the output signal of the LED driver 18 3-band radar detector with a length meter that indicates the distance to the signal source in level. 3. The radar detector according to claim 1, wherein the band select switching unit (12) comprises a J-K flip flop. The radar detector according to claim 1, wherein the band selector (11) comprises a multivibrator.