CN109474274A - Radio frequency synthetic source frequency synthesizer circuit - Google Patents
Radio frequency synthetic source frequency synthesizer circuit Download PDFInfo
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- CN109474274A CN109474274A CN201811594772.7A CN201811594772A CN109474274A CN 109474274 A CN109474274 A CN 109474274A CN 201811594772 A CN201811594772 A CN 201811594772A CN 109474274 A CN109474274 A CN 109474274A
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- 230000010355 oscillation Effects 0.000 claims abstract description 35
- 230000015572 biosynthetic process Effects 0.000 claims description 24
- 238000003786 synthesis reaction Methods 0.000 claims description 24
- 238000001914 filtration Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 230000003321 amplification Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
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Abstract
A kind of radio frequency synthetic source frequency synthesizer circuit, including Digital Frequency Synthesize circuit, the first bandpass filter, second bandpass filter, one local oscillation circuit, two local oscillation circuits, the first frequency mixer, second frequency mixer, low-pass filter, frequency-halving circuit, divide by four circuit, two frequency multiplier circuit for the first time, second of two frequency multiplier circuit；The signal of AD9914 output, later by frequency expansion, completes the rate-adaptive pacemaker of 200~6000MHz of veneer in the output for obtaining 750~1500MHz after being mixed twice；Using AD9914, have the function of frequency hopping and fine tune resolution ratio, AD9914 includes a 32 bit parallel data input port of high speed, can support the fast programming of phase, frequency and amplitude tuning word, realize amplitude modulation, the generation of frequency modulation, phase-modulated signal；Frequency tuning and control word can produce the linear scan waveform of frequency, phase or amplitude by the port serial or parallel I/O loading AD9914.
Description
Technical field
The present invention relates to a kind of instrument-landing-system, in particular to a kind of radio frequency synthetic source frequency synthesizer circuit.
Background technique
Instrument-landing-system (Instrument Landing System, ILS) is translated into instrument landing system, blind landing system again
System, is the aircraft precision approach and Landing Guidance System being most widely used, including localizer (LOC) system, glide-path localizer
(GS) system, marker beacon (MB) system three parts.Its effect is to realize course by two beam radio signals of ground launch
Road and glide path guide establish one and are directed toward aerial virtual glissade by runway, and aircraft is determined certainly by airborne receiving equipment
The relative position of body and the path makes aircraft fly to runway along correct direction and steadily declines, finally realizes safe landing.That
, the signal of the good wide frequency range of one accuracy high stability of ground launch is needed, in order to amplitude modulation, frequency modulation, phase-modulated signal
Generation.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency in the presence of the prior art, a kind of radio frequency synthesis source frequency is provided
Combiner circuit.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
A kind of radio frequency synthetic source frequency synthesizer circuit, including Digital Frequency Synthesize circuit, the first bandpass filter, the second band
Bandpass filter group, a local oscillation circuit, two local oscillation circuits, the first frequency mixer, the second frequency mixer, low-pass filter, frequency-halving circuit
And divide by four circuit, two frequency multiplier circuits of first time, second of two frequency multiplier circuit；
The signal that the Digital Frequency Synthesize circuit generates is after first bandpass filter, with the local oscillator electricity
Road generate signal be mixed in first frequency mixer after by switching be three road signals；Three road signals are cut by switch
Changing after the rear signal generated with two local oscillation circuit be mixed in second frequency mixer through switching is three road signals,
Respectively by the second bandpass filter group, fundamental wave segment signal is obtained using the low-pass filter；Fundamental wave segment signal is logical
Exported after crossing two frequency multiplier circuit of first time, or by after two frequency multiplier circuit of first time using second two frequencys multiplication
It exports after circuit, or is exported after the frequency-halving circuit and the divide by four circuit, complete the frequency expansion of high low side.
The Digital Frequency Synthesize circuit includes Direct Digital Frequency Synthesizers, analog-digital converter, field-programmable gate array
Column and first filter；The analog signal received is converted to digital signal by the analog-digital converter, is then input to described
The output of field programmable gate array, the field programmable gate array is output to the Digital Frequency Synthesize by parallel interface
The signal of device, synthesis exports after first filter filtering.
One local oscillation circuit includes first frequency synthesis chip, second filter, the first power circuit, the first frequency dividing
Device, the first amplifier, first switch, second switch, the first low-pass filter circuit；First power circuit is described first
Frequency synthesis chip provides power supply, and the signal of the first frequency synthesis chip synthesis filters laggard by the second filter
Enter the first frequency divider frequency dividing, the first switch is output to after then being amplified by first amplifier, by institute
State the first low-pass filter circuit filtering after, into the second switch after export.
Two local oscillation circuit includes second frequency synthesis chip, third filter, second source circuit, voltage controlled oscillation
Device, the second amplifier, third switch, the 4th switch, the second low-pass filter circuit；The second source circuit is described second
Frequency synthesis chip provides power supply, and the signal of the second frequency synthesis chip synthesis is laggard by the third filter filtering
Enter the voltage controlled oscillator, third switch is output to after then being amplified by second amplifier, by described the
After the filtering of two low-pass filter circuits, exported after being switched into the described 4th.
Compared with prior art, beneficial effects of the present invention: the frequency of 200~6000MHz of completion rate veneer of the present invention is defeated
Out, the up to frequency signal of 1.4GHz can be generated using AD9914, and AD9914 has the function of frequency hopping and fine tune resolution ratio
Energy.Frequency tuning and control word can produce the line of frequency, phase or amplitude by the port serial or parallel I/O loading AD9914
Property sweep waveform.AD9914 includes a 32 bit parallel data input port of high speed, can support phase, frequency and amplitude tuning word
Fast programming, realize amplitude modulation, the generation of frequency modulation, phase-modulated signal.
Detailed description of the invention:
Fig. 1 is the structural block diagram of the embodiment of the present invention.
Fig. 2 is the circuit connection diagram of digital frequency synthesizer.
Fig. 3 is the circuit connection diagram of a local oscillation circuit.
Fig. 4 is the circuit connection diagram of two local oscillation circuits.
Fig. 5 is the circuit connection diagram of the first frequency mixer.
Fig. 6 is the circuit connection diagram of the second frequency mixer.
Fig. 7 is the circuit connection diagram of frequency-halving circuit and divide by four circuit.
Fig. 8 is the circuit connection diagram of two frequency multiplier circuits for the first time.
Fig. 9 is the circuit connection diagram of second of two frequency multiplier circuit.
Specific embodiment
Below with reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
It is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodiments
The range of invention.
Such as Fig. 1, a kind of radio frequency synthetic source frequency synthesizer circuit, including Digital Frequency Synthesize circuit, bandpass filter, one
Shake circuit, two local oscillation circuits, the first frequency mixer, the second frequency mixer, low-pass filter, frequency-halving circuit, divide by four circuit, and first
Secondary two frequency multiplier circuit, second of two frequency multiplier circuit；
The 427MHz signal that the Digital Frequency Synthesize circuit generates is after the bandpass filter, with a local oscillator
Circuit generate signal be mixed in the first frequency mixer N16 after by switching be three road signals, such as Fig. 5, the first via
Intermediate frequency is that the 940MHz local oscillation signal that a local oscillation circuit generates is mixed to obtain with 427MHz signal 1367MHz signal, second
Road intermediate frequency is that the 1210MHz local oscillation signal that a local oscillation circuit generates is mixed to obtain 1637MHz signal with 427MHz signal, the
Three road intermediate frequencies are that the 1460MHz local oscillation signal that a local oscillation circuit generates is mixed to obtain 1887MHz signal with 427MHz signal；
Three road signals pass through the signal generated after switching with two local oscillation circuit and are mixed in the second frequency mixer N20, such as Fig. 6,
First via intermediate frequency is that 2117~2637MHz local oscillation signal that two local oscillation circuit generates is mixed to obtain 750 with 1367MHz signal
~1000MHz signal, the second road intermediate frequency are the 2637~2887MHz local oscillation signal and 1637MHz that a local oscillation circuit generates
Signal is mixed to obtain 1000~1250MHz signal, and third road intermediate frequency is 3137~3387MHz sheet that a local oscillation circuit generates
Vibration signal is mixed to obtain 1250~1500MHz signal with 1887MHz signal；It then is three road signals by switching, respectively
By the bandpass filter of the 750~1000MHz of bandpass filter, 1000~1250MHz and 1250~1500MHz, obtain
To 750~1500MHz signal, using the fundamental wave segment signal for obtaining 750~1500MHz after the low-pass filter；750~
The fundamental wave segment signal of 1500MHz obtains 1500~3000MHz signal by two frequency multiplier circuit of first time and exports, Huo Zhetong
It crosses after two frequency multiplier circuit of first time and obtains 3000~6000MHz signal and defeated using second of two frequency multiplier circuit
Out, or by the frequency-halving circuit and the divide by four circuit it obtains 200~750MHz signal and exports.
Such as Fig. 2, the Digital Frequency Synthesize circuit includes Direct Digital Frequency Synthesizers D1, using chip AD9914, mould
Number converter N3, field programmable gate array D15 and loop filter (including C51, C52, R17).
Such as Fig. 3, a local oscillation circuit includes frequency synthesis chip HMC830 (D4), loop filter (including R47,
R48, R49), power circuit HMC1060 (N7), frequency divider HMC905 (U1), amplifier ERA-3SM (N5), output switch
HMC536 (D2, D3) and low-pass filter (including Z1, Z2, Z3, Z4)；HMC830 is one and is integrated with the frequency synthesis of VCO
The frequency of phase locking of chip, output is up to 3GHz.Frequency synthesis chip D4 exports 1880MHz, 2420MHz, 2920MHz respectively
Signal after carrying out 2 frequency dividings using frequency divider U1, obtains the local oscillator that frequency is 940MHz, 1210MHz and 1460MHz and believes
Number；Amplifier N5 completes the amplification to a local oscillation signal, can provide the gain of 20dB or so；Exporting switch D2, D3 is one
The output channel that shakes selects, and a local oscillation signal selects different filter paths by switch, to filter out harmonic wave and clutter.
Such as Fig. 4, two local oscillation circuit include frequency synthesis chip HMC704 (U2) and loop filter (including N10,
R65, C156, C142, R10, C154, R62, L10, R63, C153, R61), VCO (N11), power circuit HMC1060 (N12), put
Big device ERA-3SM (N9, N13), output switch HMC536 (N8, N14) and low-pass filter (including Z6, Z7, Z8, Z9)；Frequently
Rate synthesis chip U2 has lower background phase noise and lesser spurious signal.Built-in decimal frequency divider cooperates external
The higher frequency synthesized signal of the available purity of VCO；Amplifier N9, N13 complete the amplification to two local oscillation signals, can provide
The gain of 20dB or so；Switch N8, N14 are exported as the selection of two local oscillator output channels, two local oscillation signals are different by switch selection
Filter path, to filter out harmonic wave and clutter.
Such as Fig. 7, the frequency-halving circuit includes frequency divider HMC432 (D9), is switched (V12, V13)；HMC432 is 2 frequency dividings
Frequency divider, V12 and V13 constitute the switch of control frequency divider power supply, switch and open when frequency divider operation, power supply is frequency divider
DC power supply is provided.
Such as Fig. 8, two frequency multiplier circuit of first time includes line transformer T1, diode V18；Frequency multiplier circuit uses two
Pole pipe balancing circuitry, avoids the interference of active circuit, while balancing circuitry can preferably offset higher hamonic wave, T1 be responsible for by
Single-ended signal is converted into differential signal and gives diode V18.
Such as Fig. 9, second of two frequency multiplier circuit include line transformer T2, diode V38；Frequency multiplier circuit uses two
Pole pipe balancing circuitry, avoids the interference of active circuit, while balancing circuitry can preferably offset higher hamonic wave, T2 be responsible for by
Single-ended signal is converted into differential signal and gives diode V38.
The above, the only detailed description of the specific embodiment of the invention, rather than limitation of the present invention.The relevant technologies
The technical staff in field is not in the case where departing from principle and range of the invention, various replacements, modification and the improvement made
It should all be included in the protection scope of the present invention.
Claims (4)
1. radio frequency synthetic source frequency synthesizer circuit, which is characterized in that including Digital Frequency Synthesize circuit, the first bandpass filter,
Second bandpass filter, a local oscillation circuit, two local oscillation circuits, the first frequency mixer, the second frequency mixer, low-pass filter, two divided-frequency
Circuit, divide by four circuit, two frequency multiplier circuits of first time, second of two frequency multiplier circuit；
The signal that the Digital Frequency Synthesize circuit generates produces after first bandpass filter with a local oscillation circuit
Raw signal is mixed in first frequency mixer, then the signal generated with two local oscillation circuit is in second frequency mixer
Mixing, obtained signal enter second bandpass filter, obtain fundamental wave segment signal, fundamental wave using the low-pass filter
Segment signal exports after passing through two frequency multiplier circuit of first time, or by after two frequency multiplier circuit of first time using described
It exports after second of two frequency multiplier circuit, or is exported after the frequency-halving circuit and the divide by four circuit.
2. radio frequency synthetic source frequency synthesizer circuit according to claim 1, which is characterized in that the Digital Frequency Synthesize electricity
Road includes Direct Digital Frequency Synthesizers, analog-digital converter, field programmable gate array and first filter；The analog-to-digital conversion
The analog signal received is converted to digital signal by device, is then input to the field programmable gate array, the scene can
The output for programming gate array is output to the digital frequency synthesizer by parallel interface, and the signal of synthesis is by first filter
It is exported after the filtering of wave device.
3. radio frequency synthetic source frequency synthesizer circuit according to claim 1, which is characterized in that a local oscillation circuit includes
First frequency synthesis chip, second filter, the first power circuit, the first frequency divider, the first amplifier, first switch, second
Switch, the first low-pass filter circuit；First power circuit provides power supply for the first frequency synthesis chip, and described
One frequency synthesis chip synthesis signal by the second filter filtering after enter first frequency divider divide, then by
First amplifier is output to the first switch after amplifying, after first low-pass filter circuit filtering,
It is exported after into the second switch.
4. radio frequency synthetic source frequency synthesizer circuit according to claim 1, which is characterized in that two local oscillation circuit includes
Second frequency synthesis chip, third filter, second source circuit, voltage controlled oscillator, the second amplifier, third switch, the 4th
Switch, the second low-pass filter circuit；The second source circuit provides power supply for the second frequency synthesis chip, and described
The signal of two frequency synthesis chips synthesis enters the voltage controlled oscillator after the third filter filtering, then by described
Second amplifier is output to the third switch and enters after second low-pass filter circuit filtering after amplifying
It is exported after 4th switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594772.7A CN109474274B (en) | 2018-12-25 | 2018-12-25 | Radio frequency synthesis source frequency synthesis circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594772.7A CN109474274B (en) | 2018-12-25 | 2018-12-25 | Radio frequency synthesis source frequency synthesis circuit |
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| CN109474274A true CN109474274A (en) | 2019-03-15 |
| CN109474274B CN109474274B (en) | 2024-05-31 |
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| CN201811594772.7A Active CN109474274B (en) | 2018-12-25 | 2018-12-25 | Radio frequency synthesis source frequency synthesis circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111464240A (en) * | 2020-03-29 | 2020-07-28 | 复旦大学 | Vector radio frequency signal generation system based on polarization multiplexing intensity modulator |
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| CN102970030A (en) * | 2012-11-01 | 2013-03-13 | 南京国睿安泰信科技股份有限公司 | System for achieving spectrum analyzer down-conversion by using broadband local oscillator and high frequency phase discrimination |
| CN103762978A (en) * | 2014-01-20 | 2014-04-30 | 东南大学 | Broadband low-phase noise frequency synthesizer without frequency divider based on harmonic mixing |
| CN104135280A (en) * | 2014-06-26 | 2014-11-05 | 西安空间无线电技术研究所 | Frequency source circuit with harmonic generation and frequency mixing |
| CN207926563U (en) * | 2018-05-14 | 2018-09-28 | 成都宝通天宇电子科技有限公司 | A kind of novel high speed broadband Low phase noise microwave source |
| CN209088927U (en) * | 2018-12-25 | 2019-07-09 | 成都前锋电子仪器有限责任公司 | Radio frequency synthetic source frequency synthesizer circuit |
-
2018
- 2018-12-25 CN CN201811594772.7A patent/CN109474274B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102970030A (en) * | 2012-11-01 | 2013-03-13 | 南京国睿安泰信科技股份有限公司 | System for achieving spectrum analyzer down-conversion by using broadband local oscillator and high frequency phase discrimination |
| CN103762978A (en) * | 2014-01-20 | 2014-04-30 | 东南大学 | Broadband low-phase noise frequency synthesizer without frequency divider based on harmonic mixing |
| CN104135280A (en) * | 2014-06-26 | 2014-11-05 | 西安空间无线电技术研究所 | Frequency source circuit with harmonic generation and frequency mixing |
| CN207926563U (en) * | 2018-05-14 | 2018-09-28 | 成都宝通天宇电子科技有限公司 | A kind of novel high speed broadband Low phase noise microwave source |
| CN209088927U (en) * | 2018-12-25 | 2019-07-09 | 成都前锋电子仪器有限责任公司 | Radio frequency synthetic source frequency synthesizer circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111464240A (en) * | 2020-03-29 | 2020-07-28 | 复旦大学 | Vector radio frequency signal generation system based on polarization multiplexing intensity modulator |
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