CN202565254U - Ultrashort wave receiver second local oscillator circuit with low power consumption and high phase noise index - Google Patents
Ultrashort wave receiver second local oscillator circuit with low power consumption and high phase noise index Download PDFInfo
- Publication number
- CN202565254U CN202565254U CN201220231263XU CN201220231263U CN202565254U CN 202565254 U CN202565254 U CN 202565254U CN 201220231263X U CN201220231263X U CN 201220231263XU CN 201220231263 U CN201220231263 U CN 201220231263U CN 202565254 U CN202565254 U CN 202565254U
- Authority
- CN
- China
- Prior art keywords
- pass filter
- low
- phase
- power consumption
- voltage controlled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Superheterodyne Receivers (AREA)
Abstract
The utility model discloses an ultrashort wave receiver second local oscillator circuit with low power consumption and high phase noise index. The ultrashort wave receiver second local oscillator circuit with low power consumption and high phase noise index consists of a low-pass filter LPF1, a phase-locked loop, an amplifier LNA, a low-pass filter LPF2 and a power divider. The phase-locked loop comprises a phase discriminator PD, a low-pass filter LPF3 and a voltage controlled oscillator VCO, wherein the phase discriminator PD, the low-pass filter LPF3 and the voltage controlled oscillator VCO are sequentially connected. One path of output of the voltage controlled oscillator VCO is connected with the input of the power divider sequentially through the amplifier LNA and the low-pass filter LPF2, and the other path of output is connected with the local oscillator signal input end of the phase discriminator PD through a high-pass filter HPF. According to the utility model, the structure of the phase-locked loop mode is adopted; the feedback loop of the voltage controlled oscillator VCO is provided with the high-pass filter, thus the spur suppression ability and the anti-interference ability of the local oscillator circuit are improved; through pre-filtering and post-filtering, the phase noise of an output signal is reduced, and the output signal-to-noise ratio is improved; in addition, the local oscillator circuit further has the characteristics of simple structure, low power consumption, low cost and the like.
Description
Technical field
The utility model relates to a kind of low-power consumption, high phase noise index ultra-short wave receiver second local oscillation circuit.
Background technology
Ultrashort wavelength is claimed metric wave again between 1～10 meter, it is better than shortwave that it propagates stability, receives the influence of season and variation round the clock little; Frequency is higher, and the frequency band broad can be used for multichannel communication; Modulation system adopts frequency modulation system usually, and signal to noise ratio is higher, and communication quality is better than shortwave; At present, the ultra short wave communication technology is widely used in transmitting business fields such as TV, FM broadcasting, radar, navigation and mobile communication.The ultra short wave communication system is made up of terminal station and relay station; The terminal station is provided with transmitter, receiver, carrier terminal and antenna; Relay station is provided with the transmitter and receiver and the respective antenna of sensible both direction, and receiver is the important component part of ultra short wave communication system.
Modern general purpose receiver more and more tends to the direction of high-performance, high integration in design process; On performance, require high linearity, great dynamic range, high sensitivity and the high-resolution of receiver; The linearity and antijamming capability that this just requires to improve as much as possible receiver reduce its distorted signals and the error rate.
After the input of ultrashort wave standard signal source, at first pass through amplitude limiter, yet amplify or the attenuator decay through amplifier; Accomplishing radio frequency dynamically adjusts; Select required frequency range through preselector then, signal is through being amplified by low noise amplifier behind the preselector, and low noise amplifier amplifies signal amplitude; Under the situation of certain gain, can the circuit noise of back be suppressed; Signal is through behind the LNA, through the image frequency signal about low pass filter filters out 8GHz.Signal is through behind the low pass filter; Carry out mixing with first local oscillation signal; Obtain intermediate-freuqncy signal, intermediate-freuqncy signal through carrying out mixing with second local oscillation signal after filtering and the processing and amplifying, obtains the second required intermediate-freuqncy signal again; From technical indicator, needing the second local oscillation circuit output frequency is the local oscillation signal of 3.45G～3.55GMHz.Yet the second traditional local oscillation circuit directly adopts the lock phase chip of integrated VCO to produce required frequency, guarantees power output through the one-level amplifier, behind amplifier, adds a band pass filter, filtering first-harmonic and high order harmonic component.Though this scheme is simple in structure, cost is lower, and phase noise index surplus is less, and power consumption is bigger.
The utility model content
The purpose of the utility model is to solve the deficiency of prior art, and a kind of simple in structure, low-power consumption that signal to noise ratio is high, spuious inhibition is effective, high phase noise index ultra-short wave receiver second local oscillation circuit are provided.
The purpose of the utility model realizes through following technical scheme: low-power consumption, high phase noise index ultra-short wave receiver second local oscillation circuit; It is made up of low pass filter LPF1, phase-locked loop, amplifier LNA, low pass filter LPF2 and power splitter, and phase-locked loop comprises phase discriminator PD, low pass filter LPF3 and the voltage controlled oscillator VCO that connects in order; The input of low pass filter LPF1 connects standard signal source; Its output links to each other with the signal source input of phase discriminator PD; The voltage output of phase discriminator PD is connected with the control voltage input terminal of voltage controlled oscillator VCO through low pass filter LPF3; One tunnel output of voltage controlled oscillator VCO is connected with the input of power splitter with low pass filter LPF2 through amplifier LNA successively; Another road output of voltage controlled oscillator VCO is connected with the input of high pass filter HPF, and the output of high pass filter HPF links to each other with the local oscillation signal input of phase discriminator PD.
The described power splitter of the utility model is one minute eight power splitter, three tunnel frequencies output ground connection wherein, in addition five the tunnel export 3450～3550MHz respectively local oscillation signal.
The described phase discriminator PD of the utility model adopts the HMC704 chip.
The described voltage controlled oscillator VCO of the utility model adopts the V844LE02-LF chip.
The described amplifier LNA of the utility model adopts the ERA-5SM chip.
The beneficial effect of the utility model is: the structure that adopts phase-locked loop manner; Voltage controlled oscillator VCO one tunnel is directly exported; Feed back to phase discriminator behind the phase demodulation frequency that the output of another road is revealed from phase demodulation through high pass filter filtering and standard signal source carries out phase demodulation; The noise of phase discriminator output voltage and interference component by low pass filter filters out after control VCO its output frequency is pulled to standard signal source, improved the spuious inhibition ability and the antijamming capability of local oscillation circuit, spuious inhibition>=65dBc; Filtering before and after passing through has again reduced the phase noise of exporting signal, phase noise≤-100dBc/Hz10k at 3550M, improved output signal-to-noise ratio; In addition, this local oscillation circuit also has simple in structure, low in energy consumption and characteristics such as cost is low.
Description of drawings
Fig. 1 is the utility model schematic block circuit diagram.
Embodiment
Further describe the technical scheme of the utility model below in conjunction with accompanying drawing: as shown in Figure 1; Low-power consumption, high phase noise index ultra-short wave receiver second local oscillation circuit; It is made up of low pass filter LPF1, phase-locked loop, amplifier LNA, low pass filter LPF2 and power splitter; Wherein, amplifier LNA adopts the ERA-5SM chip, and low pass filter LPF2 adopts the LFCN-3400 chip; Power splitter is one minute eight power splitter, and wherein the output of three tunnel frequencies is through grounding through resistance, and five the road distinguish output frequencies 3450～3550MHz, the local oscillation signal of P >=0dBm in addition.Phase-locked loop comprises phase discriminator PD, low pass filter LPF3 and the voltage controlled oscillator VCO that connects in order, and wherein, phase discriminator PD adopts the HMC704 chip, and voltage controlled oscillator VCO adopts the V844LE02-LF chip.The input of low pass filter LPF1 connects standard signal source; Its output links to each other with the signal source input of phase discriminator PD; The voltage output of phase discriminator PD is connected with the control voltage input terminal of voltage controlled oscillator VCO through low pass filter LPF3; One tunnel output of voltage controlled oscillator VCO is connected with the input of power splitter with low pass filter LPF2 through amplifier LNA successively; Another road output of voltage controlled oscillator VCO is connected with the input of high pass filter HPF, and the output of high pass filter HPF links to each other with the local oscillation signal input of phase discriminator PD.
Claims (5)
1. low-power consumption, high phase noise index ultra-short wave receiver second local oscillation circuit; It is characterized in that: it is made up of low pass filter LPF1, phase-locked loop, amplifier LNA, low pass filter LPF2 and power splitter, and phase-locked loop comprises phase discriminator PD, low pass filter LPF3 and the voltage controlled oscillator VCO that connects in order;
The input of low pass filter LPF1 connects standard signal source; Its output links to each other with the signal source input of phase discriminator PD; The voltage output of phase discriminator PD is connected with the control voltage input terminal of voltage controlled oscillator VCO through low pass filter LPF3; One tunnel output of voltage controlled oscillator VCO is connected with the input of power splitter with low pass filter LPF2 through amplifier LNA successively; Another road output of voltage controlled oscillator VCO is connected with the input of high pass filter HPF, and the output of high pass filter HPF links to each other with the local oscillation signal input of phase discriminator PD.
2. low-power consumption according to claim 1, high phase noise index ultra-short wave receiver second local oscillation circuit; It is characterized in that: described power splitter is one minute eight power splitter; Three tunnel frequencies output ground connection wherein, in addition five the tunnel export 3450～3550MHz respectively local oscillation signal.
3. low-power consumption according to claim 1, high phase noise index ultra-short wave receiver second local oscillation circuit is characterized in that: described phase discriminator PD adopts the HMC704 chip.
4. low-power consumption according to claim 1, high phase noise index ultra-short wave receiver second local oscillation circuit is characterized in that: described voltage controlled oscillator VCO adopts the V844LE02-LF chip.
5. low-power consumption according to claim 1, high phase noise index ultra-short wave receiver second local oscillation circuit is characterized in that: described amplifier LNA adopts the ERA-5SM chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220231263XU CN202565254U (en) | 2012-05-22 | 2012-05-22 | Ultrashort wave receiver second local oscillator circuit with low power consumption and high phase noise index |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220231263XU CN202565254U (en) | 2012-05-22 | 2012-05-22 | Ultrashort wave receiver second local oscillator circuit with low power consumption and high phase noise index |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202565254U true CN202565254U (en) | 2012-11-28 |
Family
ID=47214856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220231263XU Expired - Fee Related CN202565254U (en) | 2012-05-22 | 2012-05-22 | Ultrashort wave receiver second local oscillator circuit with low power consumption and high phase noise index |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202565254U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694556A (en) * | 2012-05-22 | 2012-09-26 | 成都九华圆通科技发展有限公司 | Second local oscillator circuit of ultra short wave receiver with low-power consumption and high phase noise index |
| CN103731220A (en) * | 2013-12-31 | 2014-04-16 | 成都华日通讯技术有限公司 | Radio detection receiving system and method based on ARM technique |
-
2012
- 2012-05-22 CN CN201220231263XU patent/CN202565254U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694556A (en) * | 2012-05-22 | 2012-09-26 | 成都九华圆通科技发展有限公司 | Second local oscillator circuit of ultra short wave receiver with low-power consumption and high phase noise index |
| CN102694556B (en) * | 2012-05-22 | 2014-08-13 | 成都九华圆通科技发展有限公司 | Second local oscillator circuit of ultra short wave receiver with low-power consumption and high phase noise index |
| CN103731220A (en) * | 2013-12-31 | 2014-04-16 | 成都华日通讯技术有限公司 | Radio detection receiving system and method based on ARM technique |
| CN103731220B (en) * | 2013-12-31 | 2016-09-14 | 成都华日通讯技术有限公司 | Radio monitoring based on ARM technology receives system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201966902U (en) | Multi-channel radio frequency circuit with high consistency | |
| CN102684716A (en) | 30-3000 MHz ultrashort wave receiver | |
| CN205232209U (en) | Signal reception circuit, phased array antenna and trackside unit based on zero intermediate frequency | |
| CN103905087B (en) | Wide interval frequency hopping radio-frequency receiving system | |
| CN102694556B (en) | Second local oscillator circuit of ultra short wave receiver with low-power consumption and high phase noise index | |
| CN104283574A (en) | Software radio receiver circuit | |
| WO2018188329A1 (en) | High-sensitivity receiver front-end circuit having impedance mapping function | |
| CN202565254U (en) | Ultrashort wave receiver second local oscillator circuit with low power consumption and high phase noise index | |
| CN202565256U (en) | 30-to-3000-megahertz ultra-short wave receiving machine | |
| CN110350931A (en) | A kind of ultra-wide band radio-frequency front end receiver circuit | |
| CN208112621U (en) | A kind of sample circuit applied to radar communications system | |
| CN204089733U (en) | A kind of microwave wideband band low-converter | |
| CN103905075B (en) | Wide interval frequency hopping radio-frequency system | |
| CN203909808U (en) | Radio frequency processing apparatus in intelligent tracking equipment for railway train numbers | |
| CN202634411U (en) | First local oscillator circuit of ultra-short wave receiver | |
| CN206894589U (en) | A kind of Ka wave bands quadruple chip | |
| CN214256304U (en) | Signal receiving and transmitting module for WIFI radio frequency front end | |
| CN102710267A (en) | First local oscillation circuit of ultrashort wave receiver | |
| CN101727734B (en) | Wireless remote control receiving device | |
| CN203014792U (en) | Broadband adjustable wideband RF Receiver | |
| CN109302241B (en) | Chip-based vector signal generating device and method | |
| CN201284015Y (en) | Microwave landing ground facility exciter | |
| CN112994725A (en) | High-power data transmission radio station device | |
| CN207819888U (en) | A kind of Wideband AM receiver | |
| CN206517393U (en) | X-band continuous solid-state transmitting-receiving subassembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121128 Termination date: 20150522 |
|
| EXPY | Termination of patent right or utility model |