CN102324951A - Ultra-wideband pulse generator based on digital circuit - Google Patents
Ultra-wideband pulse generator based on digital circuit Download PDFInfo
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- CN102324951A CN102324951A CN201110243179A CN201110243179A CN102324951A CN 102324951 A CN102324951 A CN 102324951A CN 201110243179 A CN201110243179 A CN 201110243179A CN 201110243179 A CN201110243179 A CN 201110243179A CN 102324951 A CN102324951 A CN 102324951A
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Abstract
The invention discloses an ultra-wideband pulse generator based on a digital circuit. The pulse generator disclosed by the invention comprises a clock source, a clock distributor, a first delayer, a second delayer, a AND gate, a filter network, a selector and an antenna, wherein the clock source is used for generating a square wave clock signal; the clock distributor is used for distributing the square wave clock signal into two paths of same clock signals; the selector is used for selecting modulation modes; the clock source is respectively connected with the input ends of the first and second delayers through the clock distributor; the output ends of the first and second delayers are connected with the two input ends of the AND gate; and the output end of the AND gate is connected with the antenna through the filter network and the selector. The ultra-wideband pulse generator based on the digital circuit disclosed by the invention has the advantages that the adjustability of the digital circuit is fully utilized, thus an ultra-wideband pulse transmission system with adjustable pulse waveform, higher pulse repetition frequency and selectable modulation mode is realized, and the system can be suitable for transmitting wireless ultra wideband and realizing high-speed data transmission.
Description
Technical field
The present invention relates to high-rate data transmission techniques, relate in particular to a kind of wireless ultra-wideband pulse generator based on digital circuit.
Background technology
The generation method of ultra-wideband pulse mainly is divided into two big modes: digital form and analog form, nowadays people have done a large amount of research and experiment to the analog form that utilizes the semiconductor device production burst.
Utilize semiconductor device to realize that the principle of ultra-wideband pulse is a switching characteristic of having utilized semiconductor device; Is the high-speed semiconductor device equivalence switch; Thereby utilize energy-storage travelling wave tube to discharge and recharge to obtain the signal of short duration, pass through pulse forming network again, thereby obtain satisfactory pulse.More common semiconductor device has three kinds: avalanche transistor, tunnel diode and step recovery diode.
Avalanche transistor is a kind of bipolar transistor, and usually design work is under avalanche breakdown mode.This transistor can produce width in the 150ns level, the burst pulse of voltage up to several kilovolts.But, realize such burst pulse, transistor need be collected the bias voltage of 70-300 volt, and this is very irrational in ultra-wideband communication system.
Tunnel diode is a kind of special diode, and the impurity concentration of PN junction both sides is very high, and the PN junction depletion layer is very thin.Tunnel current and Zener current alternating action are the key properties of tunnel diode.Utilize the special switching characteristic of tunnel diode, can obtain the rise time and reach tens pulses to the hundreds of psec, but amplitude generally has only the millivolt level, it has the shortcoming at Low ESR, two terminals of low-voltage output.
Step recovery diode has very fast switching characteristic.Step recovery diode is under high frequency or mutation voltage excitation; Storing a large amount of electric charges during forward conduction, and when forwarding reverse voltage to, the electric charge of these storages returns the original place; Form very big reverse current; Exhaust until the electric charge of storing is approaching, reverse current reduces rapidly, and returns to reverse blocking state immediately.Have the low and unsettled shortcoming of repetition rate but be to use step recovery diode to produce burst pulse, be difficult to adapt to high-speed transfer.
Summary of the invention
Goal of the invention: in order to overcome the deficiency that exists in the prior art, the present invention provides the ultra wideband narrow-pulse generator based on digital circuit that a kind of pulse duration is adjustable, pulse repetition frequency is adjustable and modulation system is optional.
Technical scheme: for realizing above-mentioned purpose, the technical scheme that the present invention adopts is:
A kind of ultra-wideband pulse generator based on digital circuit; Comprise the clock source that produces the square wave clock signal, the square wave clock signal allocation is the clock distributor of the identical clock signal of two-way, accepts the filter network of first delayer and second delayer of two-way clock signal, the output differential signal and spectrum component door, control ultra wideband narrow-pulse, the selector that modulation system is selected and the antenna of emission ultra wideband narrow-pulse respectively; The output in said clock source is connected with the input of clock distributor; Two clock signal output terminals of said clock distributor are connected with the input of first delayer with second delayer respectively; The output of said first delayer and second delayer be connected with two inputs of door; Said output with door is connected with the input of filter network; The output of said filter network is connected with the input of selector, and the output of said selector is connected with the input of antenna.
The square wave clock signal that said clock source produces, distribute the clock signal of the two-way clock signal, first delayer and the output of second delayer that produce and be differential signal with the signal of door output through clock distributor; The two ends of the differential signal of warp and door output all are linked into filter network, and the two-way output signal of filter network is to satisfy that frequency range is that require, opposite polarity ultra-wideband impulse signal; Base band data is realized data-modulated through the selection to two passages of selector.
The clock source is used to produce square wave clock signal (promptly being used to generate the required reference clock of ultra-wideband pulse), and the square wave clock signal frequency of its generation has also just determined the repetition rate of production burst; Therefore, through FREQUENCY CONTROL, can realize the control of paired pulses repetition rate to the clock source.
Clock distributor is used to distribute the identical clock signal of output two-way.
First delayer and second delayer are controlled the delay time of the identical clock signal of the two-way that distributes through clock distributor respectively; The delay time of first delayer and second delayer need be set at different values; Like this through and will produce a burst pulse behind the door, the width of this burst pulse is by the delay time difference decision that has first delayer and second delayer to set; Therefore, the control through to the relative time delay time between first delayer and second delayer can realize the control of pulse-width.
With goalkeeper through the clock signal of first delayer and second delayer carry out with, thereby export ultra-wideband pulse.
Filter network is used to control the spectrum component of ultra-wideband pulse, plays the effect of pulse shaping.
Through setting to selector, can selecting modulation mode, realization OOK modulation or bipolarity modulation.
Antenna is used to launch ultra wideband narrow-pulse.
Beneficial effect: the ultra-wideband pulse generator based on digital circuit provided by the invention; Make full use of the adjustability of digital circuit; Realized the ultra-wideband pulse emission system that a kind of impulse waveform is adjustable, pulse repetition frequency is higher, modulation system is optional; This system can be applicable to the transmission of wireless ultra-wideband, realizes high data rate conveying transmission.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of filter network.
Embodiment
Below in conjunction with accompanying drawing the present invention is done explanation further.
Be illustrated in figure 1 as a kind of ultra-wideband pulse generator based on digital circuit; Comprise the clock source that produces the square wave clock signal, the square wave clock signal allocation is the clock distributor of the identical clock signal of two-way, accepts the filter network of first delayer and second delayer of two-way clock signal, the output differential signal and spectrum component door, control ultra wideband narrow-pulse, the selector that modulation system is selected and the antenna of emission ultra wideband narrow-pulse respectively; The output in said clock source is connected with the input of clock distributor; Two clock signal output terminals of said clock distributor are connected with the input of first delayer with second delayer respectively; The output of said first delayer and second delayer be connected with two inputs of door; Said output with door is connected with the input of filter network; The output of said filter network is connected with the input of selector, and the output of said selector is connected with the input of antenna.
Wherein, NB4N507A clock synthesizer is adopted in the clock source, under the condition certain with reference to crystal oscillator frequency, and the adjustable square wave clock signal of clock source output frequency, the clock signal frequency scope of its output is 50MHz-200MHz, output level is the PECL level; Clock distributor adopts the MC100LVEP11 distributor, is a kind of 1: 2 difference distributor, and the highest frequency of its work is greater than 3.0GHz; First delayer and second delayer all adopt the MC100EP196B programmable delayer, and the time-delay adjustability of first delayer and second delayer can realize the adjustability of pulse duration; Adopt MC100EP05 difference and door with door, its maximum operation frequency is greater than 3.0GHz; Filter network is the filter that constitutes with electric capacity, inductance, and its concrete structure is as shown in Figure 2, utilizes this filter network can utilize difference PECL to realize opposite polarity ultra-wideband pulse, prepares for realizing the bipolarity modulation; Selector adopts the ADG904 data selector, utilizes the data selectivity characteristic of ADG904 and enables characteristic and can realize bipolarity modulation and on-off keying modulation; Antenna adopts micro band superwide band antenna.Whole emission system is carried out work under the control of FPGA, through FPGA clock source and selector are controlled.
The above only is a preferred implementation of the present invention; Be noted that for those skilled in the art; Under the prerequisite that does not break away from the principle of the invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (1)
1. ultra-wideband pulse generator based on digital circuit; It is characterized in that: this pulse generator comprises the clock source that produces the square wave clock signal, the square wave clock signal allocation is the clock distributor of the identical clock signal of two-way, accepts the filter network of first delayer and second delayer of two-way clock signal, the output differential signal and spectrum component door, control ultra wideband narrow-pulse, the selector that modulation system is selected and the antenna of emission ultra wideband narrow-pulse respectively; The output in said clock source is connected with the input of clock distributor; Two clock signal output terminals of said clock distributor are connected with the input of first delayer with second delayer respectively; The output of said first delayer and second delayer be connected with two inputs of door; Said output with door is connected with the input of filter network; The output of said filter network is connected with the input of selector, and the output of said selector is connected with the input of antenna.
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| CN201110243179A CN102324951A (en) | 2011-08-24 | 2011-08-24 | Ultra-wideband pulse generator based on digital circuit |
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| CN201110243179A CN102324951A (en) | 2011-08-24 | 2011-08-24 | Ultra-wideband pulse generator based on digital circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108565983A (en) * | 2018-04-26 | 2018-09-21 | 东南大学 | Self-adapted high-efficient wireless charging system and its implementation based on magnetic coupling resonance |
| CN113596829A (en) * | 2021-07-07 | 2021-11-02 | 国网电力科学研究院有限公司 | Real-time online key transmission device and method for power terminal networking scene |
| CN116260429A (en) * | 2023-03-24 | 2023-06-13 | 中国电子科技集团公司第二十六研究所 | Non-uniform period ultra-narrow pulse generation circuit and method based on ultra-high speed AND gate |
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| US20070279116A1 (en) * | 2006-05-31 | 2007-12-06 | Gunyan Daniel B | Pulse generator |
| CN101662448A (en) * | 2009-08-19 | 2010-03-03 | 东南大学 | Wireless communication method of high-speed sampling low-accuracy quantification impulse ultra-wideband |
| CN202206353U (en) * | 2011-08-24 | 2012-04-25 | 东南大学 | Ultra wide band pulse generator based on digital circuit |
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2011
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070279116A1 (en) * | 2006-05-31 | 2007-12-06 | Gunyan Daniel B | Pulse generator |
| CN101662448A (en) * | 2009-08-19 | 2010-03-03 | 东南大学 | Wireless communication method of high-speed sampling low-accuracy quantification impulse ultra-wideband |
| CN202206353U (en) * | 2011-08-24 | 2012-04-25 | 东南大学 | Ultra wide band pulse generator based on digital circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108565983A (en) * | 2018-04-26 | 2018-09-21 | 东南大学 | Self-adapted high-efficient wireless charging system and its implementation based on magnetic coupling resonance |
| CN113596829A (en) * | 2021-07-07 | 2021-11-02 | 国网电力科学研究院有限公司 | Real-time online key transmission device and method for power terminal networking scene |
| CN113596829B (en) * | 2021-07-07 | 2023-09-05 | 国网电力科学研究院有限公司 | Real-time online key transmission device and method for networking scene of power terminal |
| CN116260429A (en) * | 2023-03-24 | 2023-06-13 | 中国电子科技集团公司第二十六研究所 | Non-uniform period ultra-narrow pulse generation circuit and method based on ultra-high speed AND gate |
| CN116260429B (en) * | 2023-03-24 | 2023-09-12 | 中国电子科技集团公司第二十六研究所 | Non-uniform period ultra-narrow pulse generation circuit and method based on ultra-high speed AND gate |
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Application publication date: 20120118 |