CN204362031U - The fast frequency-hopped local vibration source of L-band - Google Patents
The fast frequency-hopped local vibration source of L-band Download PDFInfo
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- CN204362031U CN204362031U CN201420842472.7U CN201420842472U CN204362031U CN 204362031 U CN204362031 U CN 204362031U CN 201420842472 U CN201420842472 U CN 201420842472U CN 204362031 U CN204362031 U CN 204362031U
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Abstract
The utility model is the fast frequency-hopped local vibration source of L-band, solves traditional phase-locked loop circuit Hopping time and is generally tens of delicate, the problem that Hopping time is long.Output with reference to crystal oscillator (1) is connected with phase discriminator (2), the output of phase discriminator is connected with loop filter (3), the output of loop filter is connected with voltage controlled oscillator (4), one tunnel of voltage controlled oscillator exports and is connected with phase discriminator, another road of voltage controlled oscillator exports and is connected with filter (6) through frequency dividing circuit (5), and control circuit 7 is connected with phase discriminator.
Description
technical field:
The utility model is relevant with Hopping frequencies source.
background technology:
Hopping frequencies source adopts phase-locked loop circuit to realize usually, and it is low that phase-locked loop circuit has cost, the feature that Frequency spectrum quality is good, but traditional phase-locked loop circuit Hopping time is generally tens of delicate, and Hopping time is long, often can not meet the application of frequency agile system.
utility model content:
It is fast that the purpose of this utility model is to provide a kind of frequency hopping speed, and Frequency spectrum quality is good, the fast frequency-hopped local vibration source of the L-band that cost is low.
The utility model is achieved in that
The fast frequency-hopped local vibration source of L-band, output with reference to crystal oscillator 1 is connected with phase discriminator 2, the output of phase discriminator 2 is connected with loop filter 3, the output of loop filter 3 is connected with voltage controlled oscillator 4, output with reference to crystal oscillator 1 is connected with phase discriminator 2, the output of phase discriminator 2 is connected with loop filter 3, the output of loop filter 3 is connected with voltage controlled oscillator 4, one tunnel of voltage controlled oscillator exports and is connected with phase discriminator, control circuit 7 is connected with phase discriminator, and another road of voltage controlled oscillator exports and is connected with filter 6 through frequency dividing circuit 5.
80MHz temperature compensating crystal oscillator is adopted with reference to crystal oscillator 1, for whole circuit provides reference frequency, phase discriminator 2 adopts ADF4159 fraction-N-synthesizer, reference signal and voltage controlled oscillator signal are at this phase demodulation and export control signal, loop filter is by the design of rational zero pole point, control the response of phase-locked loop negative-feedback circuit, voltage controlled oscillator 4 adopts HMC588LC4B, realize X-band 8000-9600MHz signal to export, frequency dividing circuit 5 by voltage controlled oscillator output signal frequency division to L-band, realize 1000-1200MHz rate-adaptive pacemaker, filter 6 realizes suppressing to spuious after voltage controlled oscillator frequency division, ensure that spurious signal is less than 60dBc, control circuit 7 realizes configuration to phase discriminator 2 and frequency hopping control.
The fast frequency-hopped local vibration source of L-band is by making rational planning for output frequency, and in conjunction with phase-locked loop circuit, the use of frequency dividing circuit and filter, the fast frequency-hopped local vibration source of L-band achieves the fast frequency-hopped of L-band, through using its Hopping time of test of signal analyzer, 1000MHz to 1200MHz Hopping time is less than 1.5us, and local vibration source phase noise is better than 100dBc/Hz10KHz, 103dBc/Hz100KHz, clutter recognition is greater than 75dBc.Its Hopping time, the indices such as phase noise are all better than similar phase-locked local vibration source, and have frequency hopping speed fast, Frequency spectrum quality is good, the advantage that cost is low.
accompanying drawing illustrates:
Fig. 1 is phase-locked loop circuit schematic diagram.
Fig. 2 is the fast frequency-hopped local vibration source theory diagram of L-band.
Fig. 3 is the fast frequency-hopped local vibration source schematic diagram of L-band.
embodiment:
The fast frequency-hopped local vibration source of L-band is by reference crystal oscillator, and phase discriminator, loop filter, voltage controlled oscillator, frequency dividing circuit, the part such as filter and control circuit forms.
The fast frequency-hopped local vibration source of L-band, output with reference to crystal oscillator 1 is connected with phase discriminator 2, the output of phase discriminator 2 is connected with loop filter 3, the output of loop filter 3 is connected with voltage controlled oscillator 4, output with reference to crystal oscillator 1 is connected with phase discriminator 2, the output of phase discriminator 2 is connected with loop filter 3, the output of loop filter 3 is connected with voltage controlled oscillator 4, one tunnel of voltage controlled oscillator exports and is connected with phase discriminator, control circuit 7 is connected with phase discriminator, and another road of voltage controlled oscillator exports and is connected with filter 6 through frequency dividing circuit 5.
80MHz temperature compensating crystal oscillator is adopted with reference to crystal oscillator 1, for whole circuit provides reference frequency, phase discriminator 2 adopts ADF4159 fraction-N-synthesizer, reference signal and voltage controlled oscillator signal are at this phase demodulation and export control signal, loop filter is by the design of rational zero pole point, control the response of phase-locked loop negative-feedback circuit, voltage controlled oscillator 4 adopts HMC588LC4B, realize X-band 8000-9600MHz signal to export, frequency dividing circuit 5 by voltage controlled oscillator output signal frequency division to L-band, realize 1000-1200MHz rate-adaptive pacemaker, filter 6 realizes suppressing to spuious after voltage controlled oscillator frequency division, ensure that spurious signal is less than 60dBc, control circuit 7 realizes configuration to phase discriminator 2 and frequency hopping control.
Reference crystal oscillator Y1 is for TFASAN-80.00MHZ for local vibration source circuit provides frequency reference benchmark, and electric capacity C29, C30 and EC4 are crystal oscillator power-supply filter electric capacity, reduces low frequency signal to the interference of crystal oscillator.Phase discriminator U2 is ADF4159, exports control signal with reference to the signal of crystal oscillator and voltage controlled oscillator at this phase demodulation.EC1, C19, C20, C10, C11; C4 and C5 is phase discriminator power filtering capacitor, and R9, R10, R 11, R12 and R13 is phase discriminator control signal protective resistance; C15, C16, C17 and C18 are phase discriminator control line filter capacitor, reduce radiofrequency signal to the interference of phase discriminator.Voltage controlled oscillator U3 is HMC588LC4B, and the power filtering capacitor of output signal range to be 8000-9600MHz, EC3, C24 and C25 be voltage controlled oscillator, reduces low frequency signal to the interference of voltage controlled oscillator.R15, R16 and R17 forms π type attenuation network, the amplitude of voltage controlled oscillator output signal is decayed, the impedance of output signal is mated simultaneously, R18, R20 and R21 form T-shaped power distributing network, divide two-way by voltage controlled oscillator signal merit, one tunnel exports frequency divider to, and another road exports the radiofrequency signal pin of phase discriminator to.Amplifier U1 is AD8065ARZ, it and C3, R1, R2, C2, R8 and C12 form active loop filter, and the output signal of phase detector charge pump is controlled by the output frequency of this active loop filter to voltage controlled oscillator, C6 and C7 is the power filtering capacitor of amplifier, R7 and R6 provides bias voltage for amplifier forward end.Frequency divider U4 is HMC363S8GE, the output signal of T-shaped power distributing network is through resistance R22, R25 and R26 exports by after frequency divider eight frequency division after forming π type attenuation network, C32 and C33 is frequency divider capacitance, filter FZ1 is LFCN-1200+ low pass filter, suppresses the spurious signal that frequency divider produces.
The fast frequency-hopped local vibration source of L-band is tested by the signal analyzer of xx company, operating frequency is 1000-1200MHz, bandwidth of operation 200MHz, Hopping time is less than 1.5us, use the spectrum analyzer FSP7 test result of RS company to show, in 1000-1200MHz frequency range, the phase noise of the fast frequency-hopped local vibration source of L-band is better than 100dBc/Hz10KHz simultaneously, 103dBc/Hz100KHz, clutter recognition is greater than 75dBc.
Components and parts detail list is as shown in table 1.
Table 1 L-band fast frequency-hopped local vibration source device detail list:
Claims (2)
- The fast frequency-hopped local vibration source of 1.L wave band, output with reference to crystal oscillator (1) is connected with phase discriminator (2), the output of phase discriminator is connected with loop filter (3), the output of loop filter is connected with voltage controlled oscillator (4), one tunnel of voltage controlled oscillator exports and is connected with phase discriminator, it is characterized in that another road of voltage controlled oscillator exports to be connected with filter (6) through frequency dividing circuit (5), control circuit (7) is connected with phase discriminator.
- 2. the fast frequency-hopped local vibration source of L-band according to claim 1, it is characterized in that adopting 80MHz temperature compensating crystal oscillator with reference to crystal oscillator (1), for whole circuit provides reference frequency, phase discriminator (2) adopts ADF4159 fraction-N-synthesizer, reference signal and voltage controlled oscillator signal are at this phase demodulation and export control signal, loop filter (3) is by the design of zero pole point, control the response of phase-locked loop negative-feedback circuit, voltage controlled oscillator (4) adopts HMC588LC4B, realize X-band 8000-9600MHz signal to export, frequency dividing circuit (5) by voltage controlled oscillator output signal frequency division to L-band, realize 1000-1200MHz rate-adaptive pacemaker, spuious after voltage controlled oscillator frequency division suppresses by filter (6), ensure that spurious signal is less than 60dBc, control circuit (7) realization is to the configuration of phase discriminator and frequency hopping control.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420842472.7U CN204362031U (en) | 2014-12-26 | 2014-12-26 | The fast frequency-hopped local vibration source of L-band |
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| CN201420842472.7U CN204362031U (en) | 2014-12-26 | 2014-12-26 | The fast frequency-hopped local vibration source of L-band |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645949A (en) * | 2016-09-26 | 2017-05-10 | 武汉大学 | Heterodyne sweep-frequency type spectrum analyzer based on low frequency detection |
| CN108008358A (en) * | 2018-01-10 | 2018-05-08 | 重庆邮电大学 | A kind of step frequency source and its application method for Anticollision Radar radio-frequency front-end |
-
2014
- 2014-12-26 CN CN201420842472.7U patent/CN204362031U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645949A (en) * | 2016-09-26 | 2017-05-10 | 武汉大学 | Heterodyne sweep-frequency type spectrum analyzer based on low frequency detection |
| CN106645949B (en) * | 2016-09-26 | 2019-05-24 | 武汉大学 | A kind of heterodyne sweep frequency type spectrum analyzer based on low frequency detection |
| CN108008358A (en) * | 2018-01-10 | 2018-05-08 | 重庆邮电大学 | A kind of step frequency source and its application method for Anticollision Radar radio-frequency front-end |
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