CN102710267A - First local oscillation circuit of ultrashort wave receiver - Google Patents
First local oscillation circuit of ultrashort wave receiver Download PDFInfo
- Publication number
- CN102710267A CN102710267A CN201210160009XA CN201210160009A CN102710267A CN 102710267 A CN102710267 A CN 102710267A CN 201210160009X A CN201210160009X A CN 201210160009XA CN 201210160009 A CN201210160009 A CN 201210160009A CN 102710267 A CN102710267 A CN 102710267A
- Authority
- CN
- China
- Prior art keywords
- pass filter
- output
- amplifier
- low pass
- phaselocked loop
- 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.)
- Pending
Links
Images
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Superheterodyne Receivers (AREA)
Abstract
The invention discloses a first local oscillation circuit of an ultrashort wave receiver. The first local oscillation circuit comprises an amplifier LNA1 (low-noise amplifier 1), a main phaselocked loop, an auxiliary phaselocked loop, a frequency mixer, an amplifier LNA2 (low-noise amplifier 2) and a power divider, wherein the main phaselocked loop comprises a phase discriminator PD1, an active low pass filter LPF1 and a voltage control oscillator VCO1 which are connected sequentially; the auxiliary phaselocked loop comprises a phase discriminator PD2, an active low pass filter LPF2 and a voltage control oscillator VCO2 which are connected sequentially; and the output of the main phaselocked loop and the output of the auxiliary phaselocked loop are connected with the frequency mixer respectively. The first local oscillation circuit adopts a structure that the main phaselocked loop and the auxiliary phaselocked loop are combined; the main phaselocked loop aims at the frequencies ranging from 2.3G to 5.3G; the auxiliary phaselocked loop aims at the frequencies ranging from 1.6G to 1.7G; furthermore, the output frequencies are added through the frequency mixer so as to obtain an output frequency with high precision and high stability; and the frequencies are subjected to layers of filtering, so that the signal to noise ratio of the output signals is improved; and in addition, the local oscillation circuit has the characteristics of simple structure and low cost.
Description
Technical field
The present invention relates to a kind of ultra-short wave receiver first 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 local oscillation signal; Obtain intermediate-freuqncy signal, the excursion that requires intermediate-freuqncy signal is 3875～3995MHz, and the bandwidth of 20MHz can be arranged for final intermediate-frequency; With the bandwidth Design of intermediate-freuqncy signal is 3865～4005MHz, and needing local oscillation circuit input high stability, high accuracy, low noise frequency is the local oscillation signal of 3955～6985MHz.
Summary of the invention
The objective of the invention is to solve the deficiency of prior art, ultra-short wave receiver first local oscillation circuit of a kind of high stability, high accuracy, low cost, high s/n ratio is provided.
The objective of the invention is to realize by the following technical programs: ultra-short wave receiver first local oscillation circuit; It is made up of amplifier LNA1, main phaselocked loop, auxilliary phaselocked loop, frequency mixer, amplifier LNA2 and power splitter; Described main phaselocked loop comprises phase discriminator PD1, active low-pass filter LPF1 and the voltage controlled oscillator VCO 1 that connects in turn, and auxilliary phaselocked loop comprises phase discriminator PD2, low pass filter LPF2 and the voltage controlled oscillator VCO 2 that connects in turn; The input of amplifier LNA1 connects standard signal source; The output of one of which road links to each other with the input of the phase discriminator PD1 of main phaselocked loop by low pass filter LPF3; One tunnel output of the voltage controlled oscillator VCO 1 of main phaselocked loop is connected with the input of power splitter by amplifier LNA2, and another road output of voltage controlled oscillator VCO 1 links to each other with the L end of frequency mixer by at least one amplifier LNA3; Another road output of amplifier LNA1 links to each other with the input of the phase discriminator PD2 of auxilliary phaselocked loop by low pass filter LPF4; One tunnel output of the voltage controlled oscillator VCO 2 of auxilliary phaselocked loop links to each other with the I end of frequency mixer by amplifier LNA4, and another road output of voltage controlled oscillator VCO 2 connects phase discriminator PD2 by high-pass filter HPF; The R end of frequency mixer selects the input of two K switch 1 to be connected with one; One selects two outputs of two K switch 1 to be connected with the input of low pass filter LPF5 and low pass filter LPF6 respectively; The output of low pass filter LPF5 and low pass filter LPF6 selects two inputs of two K switch 2 to link to each other with one respectively, and one selects the output of two K switch 2 to link to each other with the input of phase discriminator PD1 by amplifier LNA5.
Power splitter of the present invention is one minute eight power splitter, and wherein the two-way frequency is exported ground connection, and the output of six tunnel frequencies connects amplifier LNA6 respectively in addition.
The lowpass frequency of low pass filter LPF5 of the present invention is 2.3GHz～3.4GHz, and the lowpass frequency of low pass filter LPF6 is 3.5GHz～5.3GHz.
The lowpass frequency of low pass filter LPF2 of the present invention is 1600MHz～1700MHz.
The invention has the beneficial effects as follows: the structure that adopts main phase-locked loop and auxilliary phase-locked loop to combine, main phase-locked loop is realized the big stepping saltus step of 100M, locking frequency 2.3G～5.3G; Frequency hopping is advanced in auxilliary phase-locked loop realization small step; Locking frequency is 1.6G～1.7G, and the output frequency of main phase-locked loop and auxilliary phase-locked loop through the frequency mixer addition, is obtained the output frequency of high accuracy and high stability; Through filtering layer by layer, improved the signal to noise ratio of output signal again; Characteristics such as in addition, this local oscillation circuit also has simple in structure, and low in energy consumption and cost is low.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present invention.
Embodiment
Further describe technical scheme of the present invention below in conjunction with accompanying drawing: as shown in Figure 1; Ultra-short wave receiver first local oscillation circuit; It is made up of amplifier LNA1 (ERA-5SM amplifier chip), main phase-locked loop, auxilliary phase-locked loop, frequency mixer, amplifier LNA2 (HMC392 amplifier chip) and power splitter; Power splitter is one minute eight power splitter; Wherein the output of two-way frequency is through grounding through resistance, and the output of six tunnel frequencies connects the local oscillation signal of amplifier LNA6 (HMC392 amplifier chip) output 3955～6985MHz respectively in addition.Main phase-locked loop comprises phase discriminator PD1 (HMC704 chip), active low-pass filter LPF1 and the voltage controlled oscillator VCO 1 that connects in order; Auxilliary phase-locked loop comprises phase discriminator PD2 (adopting high performance HMC704 chip equally), low pass filter LPF2 and the voltage controlled oscillator VCO 2 that connects in order; Wherein, the lowpass frequency of low pass filter LPF2 is 1600MHz～1700MHz.
The input of amplifier LNA1 connects the 100M standard signal source; The output of one of which road links to each other with the input of the phase discriminator PD1 of main phase-locked loop through low pass filter LPF3; One tunnel output of the voltage controlled oscillator VCO 1 of main phase-locked loop is connected with the input of power splitter through amplifier LNA2, and another road output of voltage controlled oscillator VCO 1 links to each other with the L end of frequency mixer through two amplifier LNA3.
Another road output of amplifier LNA1 links to each other with the input of the phase discriminator PD2 of auxilliary phase-locked loop through low pass filter LPF4; One tunnel output of the voltage controlled oscillator VCO 2 of auxilliary phase-locked loop links to each other with the I end of frequency mixer through amplifier LNA4 (ERA-3SM amplifier chip), and another road output of voltage controlled oscillator VCO 2 connects phase discriminator PD2 through high pass filter HPF; The R end of frequency mixer selects the input of two K switch 1 to be connected with one; One selects two outputs of two K switch 1 to be connected with the input of low pass filter LPF5 (LFCN-30000 filter chip) and low pass filter LPF6 (LFCN-5500 filter chip) respectively; The lowpass frequency of low pass filter LPF5 is 2.3GHz～3.4GHz; The lowpass frequency of low pass filter LPF6 is 3.5GHz～5.3GHz; The output of low pass filter LPF5 and low pass filter LPF6 selects two inputs of two K switch 2 to link to each other with one respectively, and one selects the output of two K switch 2 to link to each other with the input of phase discriminator PD1 through amplifier LNA5 (HMC476 amplifier chip).
Claims (4)
1. ultra-short wave receiver first local oscillation circuit; It is characterized in that: it is made up of amplifier LNA1, main phase-locked loop, auxilliary phase-locked loop, frequency mixer, amplifier LNA2 and power splitter; Described main phase-locked loop comprises phase discriminator PD1, active low-pass filter LPF1 and the voltage controlled oscillator VCO 1 that connects in order, and auxilliary phase-locked loop comprises phase discriminator PD2, low pass filter LPF2 and the voltage controlled oscillator VCO 2 that connects in order;
The input of amplifier LNA1 connects standard signal source; The output of one of which road links to each other with the input of the phase discriminator PD1 of main phase-locked loop through low pass filter LPF3; One tunnel output of the voltage controlled oscillator VCO 1 of main phase-locked loop is connected with the input of power splitter through amplifier LNA2, and another road output of voltage controlled oscillator VCO 1 links to each other with the L end of frequency mixer through at least one amplifier LNA3;
Another road output of amplifier LNA1 links to each other with the input of the phase discriminator PD2 of auxilliary phase-locked loop through low pass filter LPF4; One tunnel output of the voltage controlled oscillator VCO 2 of auxilliary phase-locked loop links to each other with the I end of frequency mixer through amplifier LNA4, and another road output of voltage controlled oscillator VCO 2 connects phase discriminator PD2 through high pass filter HPF; The R end of frequency mixer selects the input of two K switch 1 to be connected with one; One selects two outputs of two K switch 1 to be connected with the input of low pass filter LPF5 and low pass filter LPF6 respectively; The output of low pass filter LPF5 and low pass filter LPF6 selects two inputs of two K switch 2 to link to each other with one respectively, and one selects the output of two K switch 2 to link to each other with the input of phase discriminator PD1 through amplifier LNA5.
2. ultra-short wave receiver first local oscillation circuit according to claim 1 is characterized in that: described power splitter is one minute eight power splitter, and wherein the two-way frequency is exported ground connection, and the output of six tunnel frequencies connects amplifier LNA6 respectively in addition.
3. ultra-short wave receiver first local oscillation circuit according to claim 1 is characterized in that: the lowpass frequency of described low pass filter LPF5 is 2.3GHz～3.4GHz, and the lowpass frequency of low pass filter LPF6 is 3.5GHz～5.3GHz.
4. ultra-short wave receiver first local oscillation circuit according to claim 1 is characterized in that: the lowpass frequency of described low pass filter LPF2 is 1600MHz～1700MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210160009XA CN102710267A (en) | 2012-05-22 | 2012-05-22 | First local oscillation circuit of ultrashort wave receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210160009XA CN102710267A (en) | 2012-05-22 | 2012-05-22 | First local oscillation circuit of ultrashort wave receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102710267A true CN102710267A (en) | 2012-10-03 |
Family
ID=46902860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210160009XA Pending CN102710267A (en) | 2012-05-22 | 2012-05-22 | First local oscillation circuit of ultrashort wave receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102710267A (en) |
Cited By (2)
| 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 |
| CN103067037A (en) * | 2012-12-28 | 2013-04-24 | 成都泰格微波技术股份有限公司 | Wireless ad hoc network MESH communication module |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2258327Y (en) * | 1996-06-28 | 1997-07-23 | 清华大学 | High-resolution and broadband linear frequency-scanning signal resource |
| CN1322403A (en) * | 1999-09-24 | 2001-11-14 | 皇家菲利浦电子有限公司 | Phase locked loop frequency generating circuit and receiver using said circuit |
| CN202634411U (en) * | 2012-05-22 | 2012-12-26 | 成都九华圆通科技发展有限公司 | First local oscillator circuit of ultra-short wave receiver |
-
2012
- 2012-05-22 CN CN201210160009XA patent/CN102710267A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2258327Y (en) * | 1996-06-28 | 1997-07-23 | 清华大学 | High-resolution and broadband linear frequency-scanning signal resource |
| CN1322403A (en) * | 1999-09-24 | 2001-11-14 | 皇家菲利浦电子有限公司 | Phase locked loop frequency generating circuit and receiver using said circuit |
| CN202634411U (en) * | 2012-05-22 | 2012-12-26 | 成都九华圆通科技发展有限公司 | First local oscillator circuit of ultra-short wave receiver |
Non-Patent Citations (1)
| Title |
|---|
| 张跃辉: "《微波接收机本振模块研究》", 《中国优秀硕士学位论文数据库信息科技辑》 * |
Cited By (3)
| 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 |
| CN103067037A (en) * | 2012-12-28 | 2013-04-24 | 成都泰格微波技术股份有限公司 | Wireless ad hoc network MESH communication module |
| CN103067037B (en) * | 2012-12-28 | 2015-04-08 | 成都泰格微波技术股份有限公司 | Wireless ad hoc network MESH communication module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| USRE49903E1 (en) | Radio frequency receiver and receiving method | |
| CN102684716A (en) | 30-3000 MHz ultrashort wave receiver | |
| CN102832959B (en) | Radio-frequency front end in high and medium frequency superheterodyne+zero intermediate frequency structure | |
| CN112865832B (en) | Ground observation whistle ultrashort wave over-the-horizon information transmission equipment and transmission method | |
| US8200159B2 (en) | Radioelectric transmission and reception module mainly intended for broad-band radio-communications | |
| CN110212929B (en) | Harmonic suppression transmitter | |
| CN104283574A (en) | Software radio receiver circuit | |
| CN111697979B (en) | Mobile terminal | |
| CN101872010B (en) | Big Dipper/GPS (Global Position System) signal power divider and manufacture method thereof and dual-system radio frequency receiving module | |
| CN107171681B (en) | A kind of highly sensitive reception circuit of Ku wave band | |
| CN108400785A (en) | A kind of miniaturization microwave broadband victory frequency Up/Down Conversion system and calibration method | |
| CN102694556B (en) | Second local oscillator circuit of ultra short wave receiver with low-power consumption and high phase noise index | |
| CN202565256U (en) | 30-to-3000-megahertz ultra-short wave receiving machine | |
| CN114785358A (en) | Miniaturized L-to-C waveband multi-channel self-adaptive frequency converter | |
| CN214750803U (en) | Miniaturized broadband receiving and transmitting channel | |
| Liu et al. | A 5.8 GHz DSRC digitally controlled CMOS RF-SoC transceiver for china ETC | |
| CN107769800B (en) | Multi-frequency point terahertz inter-satellite communication receiver | |
| CN101834620B (en) | Broadband receiver with phase-locked loop local oscillation circuit | |
| CN102710267A (en) | First local oscillation circuit of ultrashort wave receiver | |
| CN202634411U (en) | First local oscillator circuit of ultra-short wave receiver | |
| CN116318228A (en) | Ultra-wideband reconfigurable full-band high-speed frequency hopping transceiver | |
| CN202565254U (en) | Ultrashort wave receiver second local oscillator circuit with low power consumption and high phase noise index | |
| CN103905075B (en) | Wide interval frequency hopping radio-frequency system | |
| CN115801036A (en) | 5G millimeter wave bidirectional double-frequency transceiver mechanism | |
| CN108512790B (en) | Transceiver all-in-one machine and terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121003 |