CN102096073A - Multi-channel multi-mode satellite navigation radio-frequency integrated circuit - Google Patents
Multi-channel multi-mode satellite navigation radio-frequency integrated circuit Download PDFInfo
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Abstract
The invention provides a multi-channel multi-mode satellite navigation radio-frequency integrated circuit which is characterized by comprising a low noise amplifier input port, an image rejection mixer output port, a passive mixer input port, a variable gain amplifier output port, a mode controlling logic unit input unit and a circuit for integrating the following circuits such as a low noise amplifier set, an image rejection mixer set, a passive mixer set, a variable gain amplifier set, a mode controlling logic unit, a frequency synthesizer and a frequency divider, wherein a satellite navigation signal is input by an active antenna set, entered into the low noise amplifier set via the low noise amplifier input port, and amplified by a low noise amplifier; and the amplified radio-frequency signals are output to the image rejection mixer set. The invention integrates a plurality of multi-channel multi-mode anti-jamming satellite navigation receiving radio-frequency circuits on one chip, which has advanges of excellent in performance, convenient in use and excellent in application prospect.
Description
Technical field
The present invention relates to integrated circuit, be specifically related to hyperchannel multimodal satellite navigation radio frequency integrated circuit.
Background technology
Satellite navigation system is made of three big subsystems: Aerospace Satellite system, ground monitoring system, user receiving system.Wherein, user receiving system mainly is made of the satellite receiver and the data processing software that support with radiotelegraphy and computer technology, is one of satellite navigation three big subsystems, is user oriented terminating machine.Because it depends on and receives to such an extent that faint radio frequency satellite-signal comes work, so it is subject to the influence of Radio frequency interference (RFI).Radio frequency interference (RFI) may be the broadband, the arrowband, unintentionally or have a mind to.Because Radio frequency interference (RFI) can not predict, when it occurred, no matter whether the signal of satellites transmits was intact, and the integrality that it all can reduce satellite-signal can't realize positioning function.
Along with the electronic technology development, electromagnetic environment is also more and more abominable, particularly when war, the enemy will launch strong same band interference signal, navigation signal is disturbed, the operate as normal of navigation neceiver depends on external radio-frequency signal, therefore be subject to the interference of external radiofrequency signal, cause the reduction of navigation accuracy, perhaps navigation neceiver loses the tracking to satellite, can't locate, " two generations of the Big Dipper " satellite navigation system of China's input huge fund foundation will lose its due effect in war like this.In order effectively to suppress to have a mind to or Radio frequency interference (RFI) unintentionally, present main flow is to realize by self-adaptation zeroing antenna technology.Self-adaptation zeroing antenna can suppress to disturb on dimensional orientation and angle to greatest extent adaptively, simultaneously to the needed effect of signals minimum that receives from Navsat in normal location.Self-adapting intelligent zeroing antenna militarily, national defense industry has vital role, can stand enemy or external electromagnetic environmental interference.
Patent " multi-mode satellite navigation receiving radio frequency front end chip " number of patent application 200710069408.4, a kind of architecting method of multi-mode satellite navigation receiving radio frequency front end has been proposed, but, this patent can't be worked in wider frequency at radio-frequency front-end, need from low noise amplifier/bank of mixers, to select the low noise amplifier or the frequency mixer of a corresponding band by the multi-mode steering logic, thereby cause the chip structure complexity, area is big, the cost height, simultaneously, because chip is only integrated one road complete receiving cable, its synchronization can only be handled the navigation signal that an antenna receives, and can't satisfy the requirement of the anti-interference satellite navigation system of hyperchannel.
The general hyperchannel module scheme of building that adopts of at present domestic anti-interference satellite navigation system by a plurality of radio frequency chips, this scheme realizes that identical function needs at least 20 key componentses, consistance between each device is relatively poor, cause systematic phase error and range error bigger, and debugging difficulty is big, is difficult to realize producing in batches.And have the cost height, problems such as volume is big, power consumption is high, consistance difference, can't well satisfy system requirements, thereby limit its application in anti-interference satellite navigation system.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of hyperchannel multimodal satellite navigation radio frequency integrated circuit.
In order to solve the problems of the technologies described above, technical scheme of the present invention is, hyperchannel multimodal satellite navigation radio frequency integrated circuit, it is characterized in that: comprise the low noise amplifier input port, the image-reject mixer output port, the passive frequency mixer input port, the variable gain amplifier output port, mode control logic unit input port and following circuit carried out integrated circuit, these circuit comprise: the low noise amplifier group, the image-reject mixer group, the passive frequency mixer group, the variable gain amplifier group, the mode control logic unit, frequency synthesizer and frequency divider; Wherein, satellite navigation signals is imported by the active antenna group, enter the low noise amplifier group by the low noise amplifier input port, after the low noise amplifier group is carried out processing and amplifying to satellite navigation signals, radiofrequency signal after the output processing and amplifying is to the image-reject mixer group, and the effect of low noise amplifier group provides enough gains to reduce system noise; The image-reject mixer group is carried out for the first time down-converted and image signal to radiofrequency signal and is suppressed to handle the back and output to external Surface Acoustic Wave Filter group by the image-reject mixer output port, and the effect of image-reject mixer group is the down coversion and finish the function that image signal the suppresses first time that realizes radiofrequency signal; Be input to the passive frequency mixer group by the passive frequency mixer input port after the noise signal that external Surface Acoustic Wave Filter group inhibition mixing produces, the passive frequency mixer group carries out outputing to after the down-converted second time variable gain amplifier group to signal, the variable gain amplifier group is amplified intermediate-freuqncy signal, exports the outer analogue-to-digital converters group of sheet to by the variable gain amplifier output port; The outer analogue-to-digital converters group of sheet is to carry out the digital algorithm computing by the outer digital signal processing unit of sheet after the digital signal with the analog intermediate frequency signal quantification treatment that receives, navigation by recognition signal and undesired signal extract correct navigation signal and send into outside navigation terminal equipment; The outer digital signal processing unit of sheet is programmed to the mode control logic unit by mode control logic unit input port, makes the mode control logic cell operation under the navigation mode of needs; The mode control logic unit is controlled frequency synthesizer and frequency divider, frequency synthesizer provides the needed local oscillation signal of down coversion for the first time for the image-reject mixer group, and frequency divider provides the needed local oscillation signal of down coversion for the second time for the passive frequency mixer group.
The present invention adjusts the null position of wave beam adaptively by aerial array and a plurality of independently satellite navigation receiver passage and digital signal processing module, make it to aim at the interference source direction and reduce secondary lobe wave beam level and suppress to disturb, disturb thereby realize eliminating, recover the integrality of satellite-signal, simultaneously, the present invention is integrated in the anti-interference satellite navigation receiving radio frequency circuit of a plurality of passage multimodes on the same chip, adopt the broadband, high linearity radio-frequency front-end designing technique, chip operation need not low noise amplifier circuit when switching between the different mode frequency range, mirror image suppresses mixting circuit, passive mixting circuit is selected, use identical radio-frequency channel just can handle to any navigation signal, thereby simplified system architecture, reduced chip area, thereby realize low-cost, small size, low-power consumption, the anti-interference satellite navigation system of the multi-mode of high conformity, performance is excellent, technology is simple, and is easy to use.
According to a kind of preferred version of hyperchannel multimodal satellite navigation radio frequency integrated circuit of the present invention, described low noise amplifier group is made of n low noise amplifier circuit, and described image-reject mixer group suppresses mixting circuit by m mirror image and constitutes m=n; The input end of each low noise amplifier circuit connects a low noise amplifier input port respectively, the output terminal of each low noise amplifier circuit connects the input end that a mirror image suppresses mixting circuit respectively, and the output terminal that each mirror image suppresses mixting circuit connects an image-reject mixer output port respectively; Frequency synthesizer provides the needed local oscillation signal of down coversion for the first time for each mirror image suppresses mixting circuit.
According to a kind of preferred version of hyperchannel multimodal satellite navigation radio frequency integrated circuit of the present invention, described passive frequency mixer group is made of m passive mixting circuit, and described variable gain amplifier group is made of M variable-gain amplification circuit; M=m; The input end of each passive mixting circuit connects a passive frequency mixer input port respectively, the output terminal of each passive mixting circuit connects the input end of a variable-gain amplification circuit respectively, the output terminal of each variable-gain amplification circuit connects a variable gain amplifier output port respectively, and frequency divider provides the needed local oscillation signal of down coversion for the second time for each passive mixting circuit.
The present invention has adopted broadband, high linearity radio-frequency front-end designing technique, integrated circuit is operated in when switching between the different mode frequency range, need not low noise amplifier circuit, mirror image inhibition mixting circuit, passive mixting circuit are selected, use identical radio-frequency channel just can handle to any navigation signal in 1.1GHz～1.7GHz, thereby simplified system architecture, reduced chip area.
A kind of preferred version according to hyperchannel multimodal satellite navigation radio frequency integrated circuit of the present invention, arbitrary mirror image suppresses mixting circuit by resistance R 1, R2, triode T1～T6 and transformer L1 constitute, triode T1, T2 forms difference common base low noise amplifier, convert the input radio frequency voltage signal to current signal, triode T3～T6 and resistance R 1, R2 forms double balanced mixer, wherein, the elementary winding of transformer L1 receives the radiofrequency signal of low noise amplifier circuit output, the output terminal of the secondary winding of transformer L1 connects triode T1 respectively, the emitter of T2, triode T1, the base stage of T2 provides bias voltage by the outside; The emitter of triode T3, T4 is connected to the collector of triode T1 simultaneously, the emitter of triode T5, T6 is connected to the collector of triode T2 simultaneously, the local oscillation signal of the base stage of triode T3～T6 receive frequency compositor (6) output simultaneously, the collector of the collector of triode T5 and triode T3 connects power supply by resistance R 1 simultaneously, the collector of the collector of triode T4 and triode T6 connects power supply by resistance R 2 simultaneously, and, the collector of triode T3, T6 output intermediate-freuqncy signal.
A kind of preferred version according to hyperchannel multimodal satellite navigation radio frequency integrated circuit of the present invention, between adjacent low noise amplifier input port, be provided with 2-6 and draw port AC GND with exchanging, adopt monolithic hyperchannel isolation technology, be used for radiofrequency signal is done shielding processing.
A kind of preferred version according to hyperchannel multimodal satellite navigation radio frequency integrated circuit of the present invention, between adjacent image-reject mixer output port, be provided with 1-4 and draw port AC GND with exchanging, adopt monolithic hyperchannel isolation technology, be used for radiofrequency signal is done shielding processing.
A kind of preferred version according to hyperchannel multimodal satellite navigation radio frequency integrated circuit of the present invention, between adjacent passive frequency mixer input port, be provided with 1-4 and draw port AC GND with exchanging, adopt monolithic hyperchannel isolation technology, be used for radiofrequency signal is done shielding processing.
The beneficial effect of hyperchannel multimodal satellite navigation radio frequency integrated circuit of the present invention is: the present invention adjusts the null position of wave beam adaptively by aerial array and a plurality of independently satellite navigation receiver passage and digital signal processing module, make it to aim at the interference source direction and reduce secondary lobe wave beam level and suppress to disturb, disturb thereby realize eliminating, recover the integrality of satellite-signal, simultaneously, the present invention is integrated in the anti-interference satellite navigation receiving radio frequency circuit of a plurality of passage multimodes on the same chip, adopt monolithic hyperchannel isolation technology and broadband, high linearity radio-frequency front-end designing technique, chip operation need not low noise amplifier circuit when switching between the different mode frequency range, mirror image suppresses mixting circuit, passive mixting circuit is selected, use identical radio-frequency channel just can handle to any navigation signal, thereby simplified system architecture, reduced chip area, thereby realize low-cost, small size, low-power consumption, the anti-interference satellite navigation system of the multi-mode of high conformity, performance is excellent, technology is simple, easy to use, have a good application prospect.
Description of drawings
Fig. 1 is the theory diagram of hyperchannel multimodal satellite navigation radio frequency integrated circuit of the present invention.
Fig. 2 is the theory diagram of four-way multimodal satellite navigation radio frequency integrated circuit of the present invention.
Fig. 3 is the schematic diagram that first mirror image suppresses mixting circuit 21.
Embodiment
Referring to Fig. 1, hyperchannel multimodal satellite navigation radio frequency integrated circuit, comprise low noise amplifier input port A1An, image-reject mixer output port D1Dn, passive frequency mixer input port E1 ... En, variable gain amplifier output port H1 ... Hn, mode control logic unit input port J, draw port AC GND and following circuit is carried out integrated circuit to a plurality of interchanges, these circuit comprise: low noise amplifier group 1, image-reject mixer group 2, passive frequency mixer group 3, variable gain amplifier group 4, mode control logic unit 5, frequency synthesizer 6 and frequency divider 7; Wherein, satellite navigation signals is by 52 inputs of active antenna group, by low noise amplifier input port A1 ... An enters low noise amplifier group 1, after 1 pair of satellite navigation signals of low noise amplifier group carries out processing and amplifying, radiofrequency signal after the output processing and amplifying is to image-reject mixer group 2, and the effect of low noise amplifier group provides enough gains to reduce system noise; 2 pairs of radiofrequency signals of image-reject mixer group carry out the first time down-converted and image signal suppress to handle the back by image-reject mixer output port D1 ... Dn outputs to external Surface Acoustic Wave Filter group 8, and the effect of image-reject mixer group 2 is the down coversions and finish the function that image signal suppresses first time that realize radiofrequency signal; External Surface Acoustic Wave Filter group 8 suppresses after the noise signal that mixing produce by passive frequency mixer input port E1 ... En is input to passive frequency mixer group 3,3 pairs of signals of passive frequency mixer group carry out outputing to after the down-converted second time variable gain amplifier group 4, variable gain amplifier group 4 is amplified to the signal amplitude that satisfies system requirements with intermediate-freuqncy signal, by variable gain amplifier output port H1 ... Hn exports the outer analogue-to-digital converters group 9 of sheet to; The outer analogue-to-digital converters group 9 of sheet is to carry out the digital algorithm computing by the outer digital signal processing unit 10 of sheet after the digital signal with the analog intermediate frequency signal quantification treatment that receives, navigation by recognition signal and undesired signal extract correct navigation signal and send into outside navigation terminal equipment 51; The outer digital signal processing unit 10 of sheet is programmed to mode control logic unit 5 by mode control logic unit input port J, and mode control logic unit 5 is operated under the different navigation mode such as GPS, BeiDou, GLONASS; 5 pairs of frequency synthesizers 6 in mode control logic unit and frequency divider 7 are controlled, be used for the local frequency of modulating frequency compositor output and the frequency dividing ratio of frequency divider, thereby realize that the satellite navigation signals of various modes is handled frequency synthesizer 6 provides the needed local oscillation signal of down-converted for the first time for image-reject mixer group 2, frequency divider 7 provides the needed local oscillation signal of down-converted for the second time for passive frequency mixer group 3, active antenna group 52 is by the first active antenna array Y1, the second active antenna array Y2 ... n active antenna array Yn constitutes, wherein, n is 2 to 8 natural number.
Referring to Fig. 2, in specific embodiment, a kind of four-way multimodal satellite navigation radio frequency integrated circuit is provided, comprise low noise amplifier input port A1～A4, image-reject mixer output port D1～D4, passive frequency mixer input port E1～E4, variable gain amplifier output port H1～H4, mode control logic unit input port J, draw port AC GND and following circuit is carried out integrated circuit with exchanging for 18, these circuit comprise: low noise amplifier group 1, image-reject mixer group 2, passive frequency mixer group 3, variable gain amplifier group 4, mode control logic unit 5, frequency synthesizer 6 and frequency divider 7; Wherein, described low noise amplifier group 1 is made of 4 low noise amplifier circuits, be that low noise amplifier group 1 is made of first low noise amplifier circuit 11, second low noise amplifier circuit 12, the 3rd low noise amplifier circuit 13 and the 4th low noise amplifier circuit 14, described image-reject mixer group 2 suppresses mixting circuit by 4 mirror images and constitutes, and promptly image-reject mixer group 2 is made of first mirror image inhibition mixting circuit 21, second mirror image inhibition mixting circuit 22, the 3rd mirror image inhibition mixting circuit 23 and the 4th mirror image inhibition mixting circuit 24; Described passive frequency mixer group 3 is made of 4 passive mixting circuits, be that passive frequency mixer group 3 is made of first passive mixting circuit 31, second passive mixting circuit the 32, the 3rd passive mixting circuit 33 and the 4th passive mixting circuit 34, described variable gain amplifier group 4 is made of 4 variable-gain amplification circuits; Be that variable gain amplifier group 4 is made of first variable-gain amplification circuit 41, second variable-gain amplification circuit 42, the 3rd variable-gain amplification circuit 43 and the 4th variable-gain amplification circuit 44; External Surface Acoustic Wave Filter group 8 is made of Surface Acoustic Wave Filter X1, X2, X3, X4; The outer analogue-to-digital converters group 9 of sheet is made of 4 analog to digital converters 91～94; Wherein:
Low noise amplifier input port A1 directly is connected with the first active antenna array Y1, low noise amplifier input port A2 directly is connected with the second active antenna array Y2, low noise amplifier input port A3 directly is connected with the 3rd active antenna array Y3, and low noise amplifier input port A4 directly is connected with having ideals, morality, culture, and discipline source antenna array Y4;
The input end that the input end of first low noise amplifier circuit 11 connects low noise amplifier input port A1, second low noise amplifier circuit 12 connects the input end connection low noise amplifier input port A3 of low noise amplifier input port A2, the 3rd low noise amplifier circuit 13, the input end of the 4th low noise amplifier circuit 14 connects low noise amplifier input port A4;
The output terminal of first low noise amplifier circuit 11 connects the output terminal that first mirror image suppresses mixting circuit 21, the output terminal of second low noise amplifier circuit 12 connects the output terminal that second mirror image suppresses mixting circuit 22, the output terminal of the 3rd low noise amplifier circuit 13 connects the output terminal that the 3rd mirror image suppresses mixting circuit 23, and the output terminal of the 4th low noise amplifier circuit 14 connects the output terminal that the 4th mirror image suppresses mixting circuit 24;
The output terminal that first mirror image suppresses mixting circuit 21 connects image-reject mixer output port D1; The output terminal that second mirror image suppresses mixting circuit 22 connects image-reject mixer output port D2; The output terminal that the 3rd mirror image suppresses mixting circuit 23 connects image-reject mixer output port D3; The output terminal that the 4th mirror image suppresses mixting circuit 24 connects image-reject mixer output port D4;
The input end that the input end of the first passive mixting circuit 31 connects passive frequency mixer input port E1, the second passive mixting circuit 32 connects the input end connection passive frequency mixer input port E3 of passive frequency mixer input port E2, the 3rd passive mixting circuit 33, the input end of the 4th passive mixting circuit 34 connects passive frequency mixer input port E4;
The output terminal of the first passive mixting circuit 31 connects the input end of first variable-gain amplification circuit 41, the output terminal of the second passive mixting circuit 32 connects the input end of second variable-gain amplification circuit 42, the output terminal of the 3rd passive mixting circuit 43 connects the input end of the 3rd variable-gain amplification circuit 43, and the output terminal of the 4th passive mixting circuit 44 connects the input end of the 4th variable-gain amplification circuit 44;
The output terminal of first variable-gain amplification circuit 41 connects variable gain amplifier output port H1; The output terminal of second variable-gain amplification circuit 42 connects variable gain amplifier output port H2; The output terminal of the 3rd variable-gain amplification circuit 43 connects variable gain amplifier output port H3; The output terminal of the 4th variable-gain amplification circuit 44 connects variable gain amplifier output port H4;
Frequency synthesizer 6 provides the needed local oscillation signal of down coversion for the first time for first mirror image suppresses mixting circuit 21, second mirror image suppresses mixting circuit 22, the 3rd mirror image inhibition mixting circuit 23 and the 4th mirror image inhibition mixting circuit 24;
Frequency divider 7 provides the needed local oscillation signal of down coversion for the second time for first passive mixting circuit 31, second passive mixting circuit the 32, the 3rd passive mixting circuit 33 and the 4th passive mixting circuit 34.
External Surface Acoustic Wave Filter X1 between image-reject mixer output port D1 and the passive frequency mixer input port E1, external Surface Acoustic Wave Filter X4 between external Surface Acoustic Wave Filter X3, image-reject mixer output port D4 and the passive frequency mixer input port E4 between external Surface Acoustic Wave Filter X2, image-reject mixer output port D3 and the passive frequency mixer input port E3 between image-reject mixer output port D2 and the passive frequency mixer input port E2.
Be provided with 4 between low noise amplifier input port A1, the A2, between low noise amplifier input port A2, the A3 and between low noise amplifier input port A3, the A4 and draw port AC GND with exchanging, be used for radiofrequency signal is done shielding processing.
Be provided with 1 between image-reject mixer output port D1, the D2 and between image-reject mixer output port D3, the D4 and draw port AC GND with exchanging, be used for radiofrequency signal is done shielding processing.
Be provided with 1 between passive frequency mixer input port E1, the E2 and between passive frequency mixer input port E3, the E4 and draw port AC GND with exchanging, be used for radiofrequency signal is done shielding processing.
Isolation between the radio-frequency channel is a difficult problem that hinders hyperchannel radio system singualtion always, and the radiofrequency signal coupling between the contiguous exit of ceramic package shell is the main cause that causes isolation difference between the radio-frequency channel.The present invention adopts the pin arrangements mode of optimization, is taking under the situation of less exit, has improved the isolation between the input of hyperchannel satellite navigation radio frequency integrated circuit radio frequency, the output port.
The low noise amplifier input port A1 of hyperchannel multimodal satellite navigation radio frequency integrated circuit ... An directly is connected with active antenna array respectively, makes the multiple-link satellite navigation signal by low noise amplifier input port A1 ... An enters radio frequency integrated circuit; Wherein, first via satellite navigation signals is input to by the first active antenna array Y1 and downconverts to first intermediate frequency through first mirror image inhibition mixting circuit 21 after first low noise amplifier circuit 11 amplifies, after the external Surface Acoustic Wave Filter X1 filtering of image-reject mixer output port D1, be sent to first passive mixting circuit 31 down-converted to the second intermediate frequencies in the integrated circuit by passive frequency mixer input port E1 again, after first variable-gain amplification circuit 41 amplify the back and be sent in the outer analog to digital converter 91 of sheet by variable gain amplifier output port H1; The outer analog to digital converter 91 of sheet is to output to the outer digital signal processing unit 10 of sheet after the digital signal to carry out the digital algorithm computing with the analog intermediate frequency signal quantification treatment that receives, navigation by recognition signal and undesired signal extract correct navigation signal and send into outside navigation terminal equipment 51; The outer digital signal processing unit 10 of sheet is programmed to mode control logic unit 5 by mode control logic unit input port J, and mode control logic unit 5 is operated under the navigation mode that needs; 5 pairs of frequency synthesizers 6 in mode control logic unit and frequency divider 7 are controlled, and are used for the local frequency of modulating frequency compositor output and the frequency dividing ratio of frequency divider, thereby realize the satellite navigation signals of various modes is handled.Frequency synthesizer 6 provides the needed local oscillation signal of down-converted for the first time for each mirror image suppresses mixting circuit 21,22,23,24, and frequency divider 7 provides the needed local oscillation signal of down-converted for the second time for each passive frequency mixer circuit 31,32,33,34.The signal processing of the satellite navigation signals on all the other several roads is identical with the signal processing of first via satellite navigation signals, this not tired stating.
The present invention has adopted broadband, high linearity radio-frequency front-end designing technique, chip operation need not low noise amplifier, frequency mixer are selected when switching between the different mode frequency range, use identical radio-frequency channel just can handle to any navigation signal in 1.1GHz～1.7GHz, thereby simplified system architecture, reduced chip area.
Referring to Fig. 3, Fig. 3 is the schematic diagram that first mirror image suppresses mixting circuit 21, first mirror image suppresses mixting circuit by resistance R 1, R2, triode T1～T6 and transformer L1 constitute, radiofrequency signal is imported by the B1 port, the low Insertion Loss transformer L1 in broadband realizes the impedance matching of prevention at radio-frequency port and the function of single-ended transfer difference on the sheet, SiGe triode T1, T2 forms difference common base low noise amplifier, convert the input radio frequency voltage signal to current signal, has the broadband, the characteristics of high linearity, triode T3～T6 and resistance R 1, R2 forms double balanced mixer, under the driving of the local oscillation signal of port C1, realize the function of down coversion, wherein, the elementary winding of transformer L1 receives the radiofrequency signal of low noise amplifier circuit output, and the output terminal of the secondary winding of transformer L1 connects triode T1 respectively, the emitter of T2, triode T1, the base stage of T2 is triode T1 by port VB, T2 provides suitable bias voltage; The emitter of triode T3, T4 is connected to the collector of triode T1 simultaneously, the emitter of triode T5, T6 is connected to the collector of triode T2 simultaneously, the local oscillation signal of the base stage of triode T3～T6 receive frequency compositor (6) output simultaneously, the collector of the collector of triode T5 and triode T3 connects power supply by resistance R 1 simultaneously, the collector of the collector of triode T4 and triode T6 connects power supply by resistance R 2 simultaneously, and, the collector of triode T3, T6 output intermediate-freuqncy signal exported by the D1 port.
The circuit theory that second mirror image suppresses mixting circuit 22 and n mirror image inhibition mixting circuit is identical with first mirror image inhibition mixting circuit 21, this tired stating.
Eight passage multimodal satellite navigation radio frequency integrated circuit, comprise low noise amplifier input port A1～A8, image-reject mixer output port D1～D8, passive frequency mixer input port E1～E8, variable gain amplifier output port H1～H8, mode control logic unit input port J and following circuit is carried out integrated circuit, these circuit comprise: low noise amplifier group 1, image-reject mixer group 2, passive frequency mixer group 3, variable gain amplifier group 4, mode control logic unit 5, frequency synthesizer 6 and frequency divider 7; Wherein, described low noise amplifier group 1 is made of 8 low noise amplifier circuits, described image-reject mixer group 2 suppresses mixting circuit by 8 mirror images and constitutes, described passive frequency mixer group 3 is made of 8 passive mixting circuits, and described variable gain amplifier group 4 is made of 8 variable-gain amplification circuits; External Surface Acoustic Wave Filter group 8 is made of 8 Surface Acoustic Wave Filter X1～X8; The outer analogue-to-digital converters group 9 of sheet is made of 8 analog to digital converters 91～94; Annexation between each circuit is with four-way multimodal satellite navigation radio frequency integrated circuit, this not tired stating.
Above the specific embodiment of the present invention is described, still, the scope that is not limited only to embodiment of the present invention's protection.
Claims (7)
1. hyperchannel multimodal satellite navigation radio frequency integrated circuit, it is characterized in that: comprise low noise amplifier input port (A1 ... An), image-reject mixer output port (D1 ... Dn), passive frequency mixer input port (E1 ... En), variable gain amplifier output port (H1 ... Hn), mode control logic unit input port (J) and following circuit carried out integrated circuit, these circuit comprise: low noise amplifier group (1), image-reject mixer group (2), passive frequency mixer group (3), variable gain amplifier group (4), mode control logic unit (5), frequency synthesizer (6) and frequency divider (7); Wherein, satellite navigation signals is imported by active antenna group (52), by low noise amplifier input port (A1 ... An) enter low noise amplifier group (1), after low noise amplifier group (1) was carried out processing and amplifying to satellite navigation signals, the radiofrequency signal after the output processing and amplifying was to image-reject mixer group (2); Image-reject mixer group (2) to radiofrequency signal carry out the first time down-converted and image signal suppress to handle the back by image-reject mixer output port (D1 ... Dn) output to external Surface Acoustic Wave Filter group (8); External Surface Acoustic Wave Filter group (8) suppresses after the noise signal that mixing produces by passive frequency mixer input port (E1 ... En) be input to passive frequency mixer group (3), passive frequency mixer group (3) carries out outputing to after the down-converted second time variable gain amplifier group (4) to signal, variable gain amplifier group (4) is amplified intermediate-freuqncy signal, by variable gain amplifier output port (H1 ... Hn) export the outer analogue-to-digital converters group (9) of sheet to; The outer analogue-to-digital converters group (9) of sheet is to carry out the digital algorithm computing by the outer digital signal processing unit (10) of sheet after the digital signal with the analog intermediate frequency signal quantification treatment that receives, navigation by recognition signal and undesired signal extract correct navigation signal and send into outside navigation terminal equipment (11); And the outer digital signal processing unit (10) of sheet is programmed to mode control logic unit (5) by mode control logic unit input port (J), and mode control logic unit (5) is operated under the navigation mode that needs; Mode control logic unit (5) is controlled frequency synthesizer (6) and frequency divider (7), frequency synthesizer (6) provides the needed local oscillation signal of down-converted for the first time for image-reject mixer group (2), and frequency divider (7) provides the needed local oscillation signal of down-converted for the second time for passive frequency mixer group (3); Wherein, n is 2 to 8 natural number.
2. hyperchannel multimodal satellite navigation radio frequency integrated circuit according to claim 1, it is characterized in that: described low noise amplifier group (1) is made of n low noise amplifier circuit, described image-reject mixer group (2) suppresses mixting circuit by m mirror image and constitutes, wherein, and m=n; N is 2 to 8 natural number; The input end of each low noise amplifier circuit connects a low noise amplifier input port respectively, the output terminal of each low noise amplifier circuit connects the input end that a mirror image suppresses mixting circuit respectively, and the output terminal that each mirror image suppresses mixting circuit connects an image-reject mixer output port respectively; Frequency synthesizer (6) provides the needed local oscillation signal of down coversion for the first time for each mirror image suppresses mixting circuit.
3. hyperchannel multimodal satellite navigation radio frequency integrated circuit according to claim 2, it is characterized in that: described passive frequency mixer group (3) is made of m passive mixting circuit, described variable gain amplifier group (4) is made of m variable-gain amplification circuit, wherein, and m=n; N is 2 to 8 natural number; The input end of each passive mixting circuit connects a passive frequency mixer input port respectively, the input of each passive mixting circuit goes out the input end that end connects a variable-gain amplification circuit respectively, the output terminal of each variable-gain amplification circuit connects a variable gain amplifier output port respectively, and frequency divider (7) provides the needed local oscillation signal of down coversion for the second time for each passive mixting circuit.
4. according to claim 2 or 3 described hyperchannel multimodal satellite navigation radio frequency integrated circuit, it is characterized in that: arbitrary mirror image suppresses mixting circuit by resistance R 1, R2, triode T1～T6 and transformer L1 constitute, triode T1, T2 forms difference common base low noise amplifier, convert the input radio frequency voltage signal to current signal, triode T3～T6 and resistance R 1, R2 forms double balanced mixer, wherein, the elementary winding of transformer L1 receives the radiofrequency signal of low noise amplifier circuit output, the output terminal of the secondary winding of transformer L1 connects triode T1 respectively, the emitter of T2, triode T1, the base stage of T2 provides bias voltage by the outside; The emitter of triode T3, T4 is connected to the collector of triode T1 simultaneously, the emitter of triode T5, T6 is connected to the collector of triode T2 simultaneously, the local oscillation signal of the base stage of triode T3～T6 receive frequency compositor (6) output simultaneously, the collector of the collector of triode T5 and triode T3 connects power supply by resistance R 1 simultaneously, the collector of the collector of triode T4 and triode T6 connects power supply by resistance R 2 simultaneously, and, the collector of triode T3, T6 output intermediate-freuqncy signal.
5. hyperchannel multimodal satellite navigation radio frequency integrated circuit according to claim 4 is characterized in that: be provided with 2-6 and draw port (AC GND) with exchanging between adjacent low noise amplifier input port.
6. hyperchannel multimodal satellite navigation radio frequency integrated circuit according to claim 5 is characterized in that: be provided with 1-4 and draw port (AC GND) with exchanging between adjacent image-reject mixer output port.
7. hyperchannel multimodal satellite navigation radio frequency integrated circuit according to claim 6 is characterized in that: be provided with 1-4 and draw port (AC GND) with exchanging between adjacent passive frequency mixer input port.
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| CN103018637A (en) * | 2012-12-13 | 2013-04-03 | 广州供电局有限公司 | Noise reduction device and noise reduction method for transmission line travelling wave measurement |
| CN103969666A (en) * | 2014-04-21 | 2014-08-06 | 陕西北斗恒通信息科技有限公司 | High-sensitivity radio frequency receiving system and method |
| CN104297769A (en) * | 2013-07-16 | 2015-01-21 | 陕西北斗恒通信息科技有限公司 | Satellite navigation dual-mode dual-channel radio frequency chip |
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| CN109067449A (en) * | 2018-05-28 | 2018-12-21 | 成都市精准时空科技有限公司 | A kind of multi-mode satellite communication terminal and method with multiple antennas route |
| CN109067449B (en) * | 2018-05-28 | 2021-08-03 | 成都市精准时空科技有限公司 | Multimode satellite communication terminal with multiple antenna lines and method |
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| CN109167607B (en) * | 2018-10-12 | 2024-01-23 | 南京屹信航天科技有限公司 | Radio frequency circuit for miniaturized ODU receiving channel |
| CN110266338A (en) * | 2018-11-21 | 2019-09-20 | 重庆西南集成电路设计有限责任公司 | The production method of simple signal in a kind of broadband wireless transceiver |
| CN110912516A (en) * | 2019-12-12 | 2020-03-24 | 重庆西南集成电路设计有限责任公司 | High-linearity Gilbert mixer capable of adjusting IP3 in programmable manner |
| CN110912516B (en) * | 2019-12-12 | 2023-08-25 | 重庆西南集成电路设计有限责任公司 | High-linearity Gilbert mixer capable of adjusting IP3 in programmable mode |
| CN112929087A (en) * | 2021-01-28 | 2021-06-08 | 中国科学院半导体研究所 | Image frequency suppression mixing transmission method and device |
| CN112929087B (en) * | 2021-01-28 | 2022-04-22 | 中国科学院半导体研究所 | Image frequency suppression mixing transmission method and device |
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