CN102545826A - Local frequency source of secondary frequency conversion receiver for satellite - Google Patents

Local frequency source of secondary frequency conversion receiver for satellite Download PDF

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Publication number
CN102545826A
CN102545826A CN2010105845788A CN201010584578A CN102545826A CN 102545826 A CN102545826 A CN 102545826A CN 2010105845788 A CN2010105845788 A CN 2010105845788A CN 201010584578 A CN201010584578 A CN 201010584578A CN 102545826 A CN102545826 A CN 102545826A
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China
Prior art keywords
frequency
crystal oscillator
signal
quadruple
fundamental frequency
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CN2010105845788A
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Chinese (zh)
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CN102545826B (en
Inventor
张宏伟
王艳军
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Shanghai Institute of Satellite Engineering
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Shanghai Institute of Satellite Engineering
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Priority to CN201010584578.8A priority Critical patent/CN102545826B/en
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Abstract

The invention relates to a receiver for a satellite, and discloses a local frequency source of a secondary frequency conversion receiver for a satellite, which comprises a high-stability temperature-compensation crystal oscillator (1). The high-stability temperature-compensation crystal oscillator (1) provides a fundamental frequency signal, the fundamental frequency signal is amplified via harmonic generators (2) and (7), quadruple-frequency sound surface wave filters (3) and (5), quadruple-frequency amplifiers (4) and (6), nonuple-frequency sound surface wave filters (8) and (10) and nonuple-frequency amplifiers (9) and (11) in a filtered manner, quadruple harmonics and nonuple harmonics of the fundamental frequency are provided, and after the quadruple harmonics and the nonuple harmonics are amplified by a detection amplifying circuit (12) in a detection manner, a crystal oscillator telemetered signal is provided. The local frequency source of the secondary frequency conversion receiver for the satellite overcomes shortcomings that in the prior art, the volume of a frequency source is large, reliability is poor, selection of devices is difficult and the like, and has the advantages of compact structure, high integrated level, low debugging difficulty and the like.

Description

Satellite is with the local frequency source of double conversion receiver
Technical field
The present invention relates to DVB, particularly a kind of satellite is with the local frequency source of double conversion receiver.
Background technology
Along with the development of satellite technology, spaceborne receiver develops towards miniaturization, modular direction.For satisfying the change in design of the satellite carried UHF receiver of certain model, for this reason, carried out the design of relevant frequency source with it.
Frequency source is the heart of modern radio-frequency and microwave electron system, and its performance directly influences whole electronic system.At present, the technical scheme of frequency source is divided into two types substantially: self-oscillation source and frequency synthesis source.The frequency source device is of a great variety, and it is synthetic etc. to mainly contain crystal oscillator, cavity oscillation device, voltage controlled oscillator, phase-locked loop frequency.But the frequency source of prior art has that volume is big, poor reliability and device are selected deficiencies such as difficulty, can't satisfy the change in design of the satellite carried UHF receiver of certain model.
Do not have at present to find explanation or report, do not collect both at home and abroad similarly data as yet yet with similar techniques of the present invention.
Summary of the invention
For the frequency source volume that solves prior art is big, poor reliability and device are selected deficiencies such as difficulty,, the object of the present invention is to provide the local frequency source of a kind of satellite with the double conversion receiver for satisfying the instructions for use of the satellite carried UHF receiver of certain model.Utilize the present invention, can solve the volume miniaturization, reduce debugging difficulty, satisfy technical problems such as space dependability.
In order to reach the foregoing invention purpose, the technical scheme that the present invention is adopted for its technical problem of solution provides the local frequency source of a kind of satellite with the double conversion receiver, and this device comprises:
The fundamental frequency signal that high steady temperature compensating crystal oscillator provides produces the N subharmonic of fundamental frequency signal through harmonic oscillator; After two groups of quadruple SAW filters and quadruple amplifier filtering amplification; The four-time harmonic of fundamental frequency signal is provided, as the local oscillation signal of double conversion receiver;
The fundamental frequency signal that high steady temperature compensating crystal oscillator provides produces the N subharmonic of fundamental frequency signal in addition through harmonic oscillator; After two group of nine frequency multiplication SAW filter and nine octamonic amplifier filtering amplification; Nine subharmonic of fundamental frequency signal are provided, as the local oscillation signal of double conversion receiver;
The fundamental frequency signal that high steady temperature compensating crystal oscillator provides provides the crystal oscillator telemetered signal after the detector amplifier detection is amplified, be used to monitor the crystal oscillator operating state.
A kind of satellite of the present invention owing to take technique scheme, adopts high steady temperature compensating crystal oscillator that the fundamental frequency signal with high stability is provided with the local frequency source of double conversion receiver, has solved the shortcoming of output frequency drift under the high low temperature; Adopt passive diode frequency multiplier circuit to make harmonic oscillator, circuit is simple, and reliability is high; Adopt SAW filter to suppress harmonic wave, reduced debugging difficulty.Therefore, device of the present invention has been obtained compact conformation, and integrated level is high, the little beneficial effect that waits of debugging difficulty.
Description of drawings
Accompanying drawing is the theory diagram of satellite of the present invention with the local frequency source of double conversion receiver.
Embodiment
Below in conjunction with description of drawings the preferred embodiments of the present invention.
Accompanying drawing is the theory diagram of a kind of satellite of the present invention with the local frequency source of double conversion receiver, and shown in the embodiment of accompanying drawing, this device comprises:
High steady temperature compensating crystal oscillator 1, harmonic oscillator 2,7, quadruple SAW filter 3,5, quadruple amplifier 4,6, nine frequency multiplication SAW filters 8,10, nine octamonic amplifiers 9,11, detector amplifier 12.
Signal transmission relation with this device is described below at present:
The fundamental frequency signal that high steady temperature compensating crystal oscillator 1 provides produces the N subharmonic of fundamental frequency signal through harmonic oscillator 2; After quadruple SAW filter 3, quadruple amplifier 4, quadruple SAW filter 5 and 6 filtering of quadruple amplifier are amplified, the local oscillation signal of the four-time harmonic of fundamental frequency signal as the double conversion receiver is provided;
The fundamental frequency signal that high steady temperature compensating crystal oscillator 1 provides produces the N subharmonic of fundamental frequency signal through harmonic oscillator 7; After nine frequency multiplication SAW filters 8, nine octamonic amplifiers 9, nine frequency multiplication SAW filters 10 and 11 filtering of nine octamonic amplifiers are amplified, the local oscillation signal of nine subharmonic of fundamental frequency signal as the double conversion receiver is provided;
In addition, the fundamental frequency signal that high steady temperature compensating crystal oscillator 1 provides provides the crystal oscillator telemetered signal to be used to monitor the crystal oscillator operating state after detector amplifier 12 detections are amplified.
Above-mentioned harmonic oscillator 2,7 is a diode frequency multiplier.
The output frequency of apparatus of the present invention both can be changed by the fundamental frequency of crystal oscillator output, also can select different filter, amplifier to change.
Each item index of the local oscillation signal that device of the present invention produced mainly depends on these indexs of high steady temperature compensating crystal oscillator like: frequency accuracy, frequency stability (comprising long-term and short-term), phase noise, temperature stability; And frequency multiplier and amplifier, filter etc. are less to the regulating action of these performance index; Therefore; Main debugging is to analyze in order to satisfy the indication range of the needed crystal oscillator of desired local oscillation signal index in the manufacture process, and the workload of adjustment is little.
In the embodiment of the invention, all circuit blocks all adopt functional module.At first, solved the shortcoming of common crystal oscillating circuit output frequency drift under the high low temperature, therefore, need not other design temperature compensating circuit owing to adopt the high temperature temperature compensating crystal oscillator that the fundamental frequency signal with high stability is provided; Next adopts passive diode frequency multiplier circuit as harmonic oscillator, and circuit is simple, greatly improves compared to triode frequency multiplier circuit reliability; Last harmonic wave suppresses filter circuit and adopts SAW filter, has reduced debugging difficulty.All circuit can provide frequency conversion required local oscillation signal for the double conversion receiver through rational layout designs.Apparatus structure of the present invention is compact, and integrated level is high, during debugging, only need adjust the amplitude of crystal oscillator output frequency and output signal, so the workload of debugging difficulty and debugging is very little.

Claims (3)

1. a satellite is characterized in that with the local frequency source of double conversion receiver this device comprises:
The fundamental frequency signal that high steady temperature compensating crystal oscillator (1) provides produces the N subharmonic of fundamental frequency signal through harmonic oscillator (2); After quadruple SAW filter (3), quadruple amplifier (4), quadruple SAW filter (5) and quadruple amplifier (6) filtering are amplified; The four-time harmonic of fundamental frequency signal is provided, as the local oscillation signal of double conversion receiver;
The fundamental frequency signal that high steady temperature compensating crystal oscillator (1) provides produces the N subharmonic of fundamental frequency signal through harmonic oscillator (7); After nine frequency multiplication SAW filters (8), nine octamonic amplifiers (9), nine frequency multiplication SAW filters (10) and nine octamonic amplifiers (11) filtering are amplified; Nine subharmonic of fundamental frequency signal are provided, as the local oscillation signal of double conversion receiver;
The fundamental frequency signal that high steady temperature compensating crystal oscillator (1) provides provides the crystal oscillator telemetered signal after detector amplifier (12) detection is amplified, be used to monitor the crystal oscillator operating state.
2. the local frequency source of double conversion receiver as claimed in claim 1 is characterized in that: described harmonic oscillator (2), (7) are diode frequency multiplier.
3. the local frequency source of double conversion receiver as claimed in claim 1 is characterized in that: the output frequency in said local frequency source is changed by the fundamental frequency of crystal oscillator output, also can select different filter, amplifier to change.
CN201010584578.8A 2010-12-10 2010-12-10 The local frequency source of secondary of frequency conversion receiver for satellite Active CN102545826B (en)

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CN102545826B CN102545826B (en) 2016-03-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103312322A (en) * 2013-05-16 2013-09-18 中国电子科技集团公司第四十一研究所 Local oscillator circuit and local oscillation signal generation method
CN106231777A (en) * 2016-07-29 2016-12-14 中国原子能科学研究院 A kind of signal source of high stability of superconducting cyclotron

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6009129A (en) * 1997-02-28 1999-12-28 Nokia Mobile Phones Device and method for detection and reduction of intermodulation distortion
JP2002016440A (en) * 2000-04-27 2002-01-18 Toshiba Corp Frequency multiplication circuit and semiconductor integrated circuit
CN101030668A (en) * 2007-02-28 2007-09-05 上海杰盛无线通讯设备有限公司 Wide-band microwave local oscillator generator combined direct multiply-frequency with lock phase

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6009129A (en) * 1997-02-28 1999-12-28 Nokia Mobile Phones Device and method for detection and reduction of intermodulation distortion
JP2002016440A (en) * 2000-04-27 2002-01-18 Toshiba Corp Frequency multiplication circuit and semiconductor integrated circuit
CN101030668A (en) * 2007-02-28 2007-09-05 上海杰盛无线通讯设备有限公司 Wide-band microwave local oscillator generator combined direct multiply-frequency with lock phase

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103312322A (en) * 2013-05-16 2013-09-18 中国电子科技集团公司第四十一研究所 Local oscillator circuit and local oscillation signal generation method
CN103312322B (en) * 2013-05-16 2016-08-17 中国电子科技集团公司第四十一研究所 A kind of local oscillation circuit and method for generating local oscillation signal
CN106231777A (en) * 2016-07-29 2016-12-14 中国原子能科学研究院 A kind of signal source of high stability of superconducting cyclotron
CN106231777B (en) * 2016-07-29 2019-01-29 中国原子能科学研究院 A kind of signal source of high stability of superconducting cyclotron

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