CN104320365A - Ku band BPSK modulator circuit and BPSK modulation driving circuit - Google Patents
Ku band BPSK modulator circuit and BPSK modulation driving circuit Download PDFInfo
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- CN104320365A CN104320365A CN201410631418.2A CN201410631418A CN104320365A CN 104320365 A CN104320365 A CN 104320365A CN 201410631418 A CN201410631418 A CN 201410631418A CN 104320365 A CN104320365 A CN 104320365A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
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Abstract
The invention provides a Ku band BPSK modulator circuit. The Ku band BPSK modulator circuit comprises a high-speed driving circuit, an adjustable resistor and a microwave double balanced mixer, wherein the high-speed driving circuit, the adjustable resistor and the microwave double balanced mixer are connected in sequence, the high-speed driving circuit is used for converting input BPSK signals into driving signals with current driving capacity, the adjustable resistor is used for adjusting the driving current of the driving signals, the microwave double balanced mixer is provided with an intermediate frequency port, a local oscillator port and a radio frequency port, the intermediate frequency port receives the adjusted driving signals, the adjusted driving signals and Ku band carrier signals input into the local oscillator port are modulated, and after modulation, Ku band BPSK modulation signals are output through the radio frequency port. The invention further provides a Ku band BPSK modulation driving circuit. Direct BPSK modulation of the Ku band signals is realized, the purposes of simplifying the circuit, reducing the size of a product and reducing the cost of the product are realized, and good technical indexes can be obtained. The power of the intermediate frequency signals is adjusted, so that the purpose of improving the carrier suppression degree is realized.
Description
Technical field
The invention belongs to microwave radar fields of measurement, be specifically related to a kind of novel Ku wave band BPSK modulation circuit and BPSK modulation drive circuit.
Background technology
Antijamming capability is strong because having for spread spectrum system, strong security, can realize the advantage of code division multiple access and high-acruracy survey, is widely used in satellite communication, radio navigation system.In spread spectrum system, broadband spread spectrum signal is produced by spread spectrum modulation, usually the mode of carrier wave being carried out to phase shift keying modulation is adopted in direct sequence spread spectrum system, the more phase shift keying being the most also is binary phase shift keying (Binary Phase Shift Keying, BPSK).Binary phase shift keying refers to mode analog signal being converted to data value, is the mode utilizing the plural wave combination departing from phase place to carry out the phase shift of performance information keying.The signal form of BPSK is generally expressed as binary system psk signal: get 0 phase place when namely sending 1, gets π phase place when sending 0, and Fig. 1 is that in time domain, unmodulated waveform and modulation waveform contrast schematic diagram.
Traditional microwave BPSK modulation transmitter, due to the restriction by BPSK modulator working band, adopts repeatedly variable-frequency solutions to realize the BPSK modulation of microwave signal more.But the present inventor finds through research, traditional microwave BPSK modulation transmitter is complicated, size is comparatively large, cost is higher.
Summary of the invention
For the technical problem that traditional microwave BPSK modulation transmitter exists, the invention provides a kind of novel Ku wave band BPSK modulation circuit, by directly carrying out BPSK modulation to Ku band signal, realizing simplifying circuit, reduce product size, reducing product cost, and can good performance index be obtained.
To achieve these goals, the present invention adopts following technical scheme:
A kind of Ku wave band BPSK modulation circuit, comprises the high-speed driving circuit, adjustable resistance and the microwave double balanced mixer that are linked in sequence; Wherein,
Described high-speed driving circuit is used for converting the bpsk signal of input the drive singal with current driving ability to;
Described adjustable resistance is used for regulating the drive current size of described drive singal;
Described microwave double balanced mixer is provided with intermediate frequency port, local oscillator port and prevention at radio-frequency port, described intermediate frequency port receives the drive singal after regulating, modulate with the Ku band carrier signal of the described local oscillator port of input, after modulation, export Ku wave band BPSK modulation signal through described prevention at radio-frequency port.
In Ku wave band BPSK modulation circuit provided by the invention, the bpsk signal of input is changed by described high-speed driving circuit, make it have current driving ability, the drive current size of described adjustable resistance to the drive singal after conversion regulates, to adjust intermediate-freuqncy signal power, and then adjustment carrier suppression, the Ku band carrier signal of the mixed device of the two balance of described microwave to the drive singal after adjustment and input is modulated, thus the direct BPSK modulation of Ku band signal is achieved, reach simplification circuit, reduce product size, reduce the object of product cost, and good technical indicator can be obtained, and by adjusting intermediate frequency signal power, improve intermediate-freuqncy signal power, achieve the object improving carrier suppression.
Further, the bpsk signal characteristic of described input is TTL signal, and described high-speed driving circuit converts described TTL signal to positive and negative Transistor-Transistor Logic level, and has current driving ability.
Further, the model that described high-speed driving circuit selects M/A COM Inc. to produce is the chip of MADR-007097.
Further, the size of described adjustable resistance is 200-1000 ohm.
The present invention also provides a kind of Ku wave band BPSK modulation drive circuit, comprise the microwave BPSK modulator being provided with right aforementioned Ku wave band BPSK modulation circuit, the baseband signal unit be connected with the input of described microwave BPSK modulator and microwave local oscillation source unit, and the bandpass filtering unit be linked in sequence with the output of described microwave BPSK modulator and radio frequency amplifying unit.
In Ku wave band BPSK modulation drive circuit provided by the invention, in described microwave BPSK modulator, be provided with aforementioned Ku wave band BPSK modulation circuit, thus can realize the direct BPSK modulation of Ku band signal, and circuit integrity designs simplification, size be less and cost is lower.
Accompanying drawing explanation
Fig. 1 is the BPSK modulation signal waveform schematic diagram that prior art provides.
Fig. 2 is Ku wave band BPSK modulation circuit principle schematic provided by the invention.
Fig. 3 is the spectrum diagram after Ku wave band BPSK modulating circuit modulates provided by the invention.
Fig. 4 is that Ku wave band BPSK modulation circuit provided by the invention specifically implements schematic diagram.
Fig. 5 is Ku wave band BPSK modulation drive circuit principle schematic provided by the invention.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
Please refer to shown in Fig. 2, a kind of Ku wave band BPSK modulation circuit, comprises the high-speed driving circuit, adjustable resistance and the microwave double balanced mixer that are linked in sequence; Wherein,
Described high-speed driving circuit is used for converting the bpsk signal of input the drive singal with current driving ability to;
Described adjustable resistance is used for regulating the drive current size of described drive singal;
Described microwave double balanced mixer is provided with intermediate frequency port IF, local oscillator port LO and prevention at radio-frequency port RF, described intermediate frequency port IF receives the drive singal after regulating, modulate with the Ku band carrier signal of the described local oscillator port LO of input, after modulation, export Ku wave band BPSK modulation signal through described prevention at radio-frequency port RF.
In Ku wave band BPSK modulation circuit provided by the invention, the bpsk signal of input is changed by described high-speed driving circuit, make it have current driving ability, the drive current size of described adjustable resistance to the drive singal after conversion regulates, to adjust intermediate-freuqncy signal power, and then adjustment carrier suppression, the Ku band carrier signal of the mixed device of the two balance of described microwave to the drive singal after adjustment and input is modulated, thus the direct BPSK modulation of Ku band signal is achieved, reach simplification circuit, reduce product size, reduce the object of product cost, and good technical indicator can be obtained, and by adjusting intermediate frequency signal power, improve intermediate-freuqncy signal power, achieve the object improving carrier suppression.
As specific embodiment, bpsk signal (i.e. baseband signal) characteristic of described input is TTL signal, and described high-speed driving circuit converts described TTL signal to positive and negative Transistor-Transistor Logic level, and has current driving ability.Particularly, the bpsk signal of described input, its characteristic is TTL signal, and described bpsk signal, by after described high-speed driving circuit, converts described TTL signal to positive and negative Transistor-Transistor Logic level, and has the drive singal of certain current driving ability; Described bpsk signal enters the intermediate frequency port IF of described microwave double balanced mixer after driving, modulate with the Ku band carrier signal (i.e. local oscillation signal) of input local oscillator port LO, modulate with after through prevention at radio-frequency port RF output Ku wave band BPSK modulation signal.In the present embodiment, be TTL signal by the featured configuration of described bpsk signal, can high-speed driving circuit be driven thus.Certainly, the featured configuration of described bpsk signal is not limited thereto, and those skilled in the art, on the basis of previous embodiment, can also be arranged to continuous wave signal etc.
As specific embodiment, described high-speed driving circuit adopts cmos circuit, and the model that M/A COM Inc. specifically can be selected to produce is the chip of MADR-007097, can carry out characteristic conversion thus to the bpsk signal of input.
Particularly, carrier suppression is the leading indicator affecting BPSK modulator performance, and in theory, when the baseband signal inputted is 0,1, the BPSK modulation signal of output should not comprise carrier signal.But in side circuit, due to the restriction of device, carrier signal always can be leaked to output signal end, the carrier signal of leakage will have an impact to modulated signal, cause modulating signal phase error, and namely during 0,1 modulation, signal phase difference not exclusively equals 180 °.And in modulation circuit, usually have minimum requirement to carrier suppression, the minimum requirement >=20dB of carrier suppression in common engineering application.
Wherein, the computing formula of carrier suppression is:
In above formula, CS is carrier suppression (dB), ISO is modulator local oscillator radio frequency isolation degree (dB), and CL is conversion loss (dB), Pc is carrier power, and Pm is EF power.
For realizing good carrier suppression, can realize by selecting high, that conversion loss the is low modulator of isolation; In addition, reduce carrier power, improve EF power and also can improve carrier suppression.Because device isolation degree usual in Ku frequency range is about 35dB, conversion loss is about 10dB, and therefore the present invention realizes improving carrier suppression mainly through adjustment carrier power and EF power.
The present invention, by selecting high-speed driving circuit, processes BPSK baseband signal, makes it have driving force.Adjustable resistance is adopted between described high-speed driving circuit and microwave double balanced mixer intermediate frequency port IF, the drive current of described drive singal being regulated, by adjusting the size of drive current, can adjust EF power, drive current is large, and EF power is large; Drive current is little, and EF power is little.By improving EF power, Ku frequency range bpsk signal modulated carrier degree of suppression can be realized and be greater than 25dB, meeting system instructions for use, adopting the spectrum diagram after Ku wave band BPSK modulating circuit modulates provided by the invention as shown in Figure 3.Preferably, in order to suppress carrier signal better and take into account modulator trouble free service current range, the size of described adjustable resistance is 200-1000 ohm.
As a kind of preferred forms, please refer to shown in Fig. 4, the microwave double balanced mixer intermediate frequency port IF current value being used as modulator is set as 5mA, in figure, 1 place is the bpsk signal of input, its characteristic is Transistor-Transistor Logic level, and in figure, 2 places are ± 3.5Vdc level, and in figure, 3 places are ± 0.7Vdc level, therefore, described adjustable resistance R=(3.5-0.7) V/0.005A=560 Ω.Therefore, by adjusting the size of described adjustable resistance R, can adjust intermediate frequency port IF power, but intermediate frequency port maximum current should not exceed the lowest high-current value that device specifies.
Please refer to shown in Fig. 5, the present invention also provides a kind of Ku wave band BPSK modulation drive circuit, comprise the microwave BPSK modulator being provided with right aforementioned Ku wave band BPSK modulation circuit, the baseband signal unit be connected with the input of described microwave BPSK modulator and microwave local oscillation source unit, and the bandpass filtering unit be linked in sequence with the output of described microwave BPSK modulator and radio frequency amplifying unit.Particularly, Ku wave band BPSK modulation circuit in described microwave BPSK modulator comprises the high-speed driving circuit, adjustable resistance and the microwave double balanced mixer that are linked in sequence, described high-speed driving circuit is connected with baseband signal unit, for changing baseband signal and having certain current driving ability; The local oscillator port of described microwave double balanced mixer is connected with microwave local oscillation unit, to modulate with the drive singal (Ku band carrier signal) of process; Ku wave band bpsk signal after modulation exports bandpass filtering unit and radio frequency amplifying unit to through the prevention at radio-frequency port of microwave double balanced mixer, wherein, the function of described bandpass filtering unit and radio frequency amplifying unit is well known to those skilled in the art, and does not repeat them here.
In Ku wave band BPSK modulation drive circuit provided by the invention, in described microwave BPSK modulator, be provided with aforementioned Ku wave band BPSK modulation circuit, thus can realize the direct BPSK modulation of Ku band signal, and circuit integrity designs simplification, size be less and cost is lower.
These are only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing specification of the present invention and accompanying drawing content to do, is directly or indirectly used in the technical field that other are relevant, all in like manner within scope of patent protection of the present invention.
Claims (5)
1. a Ku wave band BPSK modulation circuit, is characterized in that, comprises the high-speed driving circuit, adjustable resistance and the microwave double balanced mixer that are linked in sequence; Wherein,
Described high-speed driving circuit is used for converting the bpsk signal of input the drive singal with current driving ability to;
Described adjustable resistance is used for regulating the drive current size of described drive singal;
Described microwave double balanced mixer is provided with intermediate frequency port, local oscillator port and prevention at radio-frequency port, described intermediate frequency port receives the drive singal after regulating, modulate with the Ku band carrier signal of the described local oscillator port of input, after modulation, export Ku wave band BPSK modulation signal through described prevention at radio-frequency port.
2. Ku wave band BPSK modulation circuit according to claim 1, is characterized in that, the bpsk signal characteristic of described input is TTL signal, and described high-speed driving circuit converts described TTL signal to positive and negative Transistor-Transistor Logic level, and has current driving ability.
3. Ku wave band BPSK modulation circuit according to claim 1 and 2, it is characterized in that, the model that described high-speed driving circuit selects M/A COM Inc. to produce is the chip of MADR-007097.
4. Ku wave band BPSK modulation circuit according to claim 1, is characterized in that, the size of described adjustable resistance is 200-1000 ohm.
5. a Ku wave band BPSK modulation drive circuit, it is characterized in that, comprise the microwave BPSK modulator being provided with Ku wave band BPSK modulation circuit according to any one of claim 1-4, the baseband signal unit be connected with the input of described microwave BPSK modulator and microwave local oscillation source unit, and the bandpass filtering unit be linked in sequence with the output of described microwave BPSK modulator and radio frequency amplifying unit.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109379317A (en) * | 2018-11-07 | 2019-02-22 | 成都天贸科技有限公司 | Beacon ball is spread under a kind of S frequency range |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090207889A1 (en) * | 2005-03-03 | 2009-08-20 | Nihon Dempa Kogyo Co., Ltd. | Spread spectrum communication method adn system using very weak power, and high frequency radio apparatus |
| CN204168325U (en) * | 2014-11-09 | 2015-02-18 | 中国电子科技集团公司第二十六研究所 | A kind of Ku wave band BPSK modulation circuit and BPSK modulation drive circuit |
-
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090207889A1 (en) * | 2005-03-03 | 2009-08-20 | Nihon Dempa Kogyo Co., Ltd. | Spread spectrum communication method adn system using very weak power, and high frequency radio apparatus |
| CN204168325U (en) * | 2014-11-09 | 2015-02-18 | 中国电子科技集团公司第二十六研究所 | A kind of Ku wave band BPSK modulation circuit and BPSK modulation drive circuit |
Non-Patent Citations (4)
| Title |
|---|
| 张鸣: "《北斗一代卫星导航接收机射频通道技术研究》", 《中国优秀硕士学位论文之信息科技辑》 * |
| 王琳: "《基于GPS伪卫星的室内无线定位系统》", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
| 田野等: "超带宽射频调谐器研制", 《2013年全国微波毫米波会议论文集》 * |
| 钱澄: "1.5GHz高线性BPSK调制器", 《微波与卫星通信》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109379317A (en) * | 2018-11-07 | 2019-02-22 | 成都天贸科技有限公司 | Beacon ball is spread under a kind of S frequency range |
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Application publication date: 20150128 |