CN207304531U - Ultra wide band chaotic signal generator - Google Patents

Abstract

Ultra-wideband chaotic signal generator. The utility model relates to an ultra-wideband chaotic signal generator. The circuit board includes a first-stage Colpitts oscillating circuit, the detuned coupling connection between the first-stage Colpitts oscillating circuit and the second-stage Colpitts oscillating circuit, and the second-stage Colpitts oscillating circuit and the third-stage Colpitts The oscillating circuits are coupled and connected with each other out of tune, the third stage Colpitts oscillating circuit sends the signal through the filter amplifier circuit, and the center frequency sent by the first stage Colpitts oscillating circuit is , the center frequency emitted by the second-stage Colpitts oscillator circuit is , the center frequency emitted by the third-stage Colpitts oscillator circuit is . The utility model is used for an ultra-wideband chaotic signal generator.

Description

Ultra Wideband Chaotic Signal Generator

technical field

The utility model relates to an ultra-wideband chaotic signal generator.

Background technique

When designing an ultra-wideband chaotic signal generator, it is not only required that the output chaotic signal has a very wide spectrum and good stability, but it can also work at a very high frequency. Currently, there are two methods for generating UWB chaotic signals. One is to use discrete systems to generate ultra-wideband chaotic signals. The advantage is that the signal probability distribution is controllable and the spectrum distribution is uniform. The disadvantage is that the frequency range is limited by the bandwidth and clock frequency of active devices in the circuit. If the system state is quantized, it may also lead to periodicity in the signal. The other is that the continuous time system generates ultra-wideband chaotic signals, and uses diodes or triodes in the circuit to obtain nonlinearity. The advantage is that the circuit structure is simple and there are abundant frequency components, but the disadvantage is that the bandwidth is narrow.

Contents of the invention

The purpose of the utility model is to provide an ultra-wideband chaotic signal generator to solve the problems of difficulty in generating ultra-wideband chaotic signals, limited bandwidth, poor randomness, and insufficiently flat frequency spectrum.

Above-mentioned purpose realizes by following technical scheme:

An ultra-wideband chaotic signal generator, the outer shell 1 is loaded with a circuit board, and the side of the outer shell 1 is provided with a first-level center frequency sending interface 2, a second-level center frequency sending interface 3 and a third-level center frequency sending interface The upper surface of the outer casing 1 described in the interface 4 is provided with a function button 5, the left side of the function button 5 is provided with a display screen 6, and the lower side of the display screen 6 is provided with an adjustment button 7;

The bottom end of the outer casing 1 is provided with a bracket I and a bracket II, the bracket I is inserted into the opening I8, and the opening I8 is arranged on both sides of the bottom end of the outer casing 1, and the bracket I includes a rotating shaft I9, the shaft I9 is covered with a shaft sleeve I10, and the shaft sleeve I10 is connected to the supporting leg I11;

A bracket II is set between the two central frequency sending interfaces, the bracket II is set in the opening II17, the bracket II includes a rotating shaft II12, and a leg with a shaft sleeve II is arranged on the rotating shaft II12 II13, outrigger III14 with bushing III, outrigger IV15 with bushing IV and outrigger V16 with bushing V;

The circuit board includes a first-stage Colpitts oscillating circuit, the detuned coupling connection between the first-stage Colpitts oscillating circuit and the second-stage Colpitts oscillating circuit, and the second-stage Colpitts oscillating circuit and the third-stage Colpitts The oscillating circuits are detuned to each other, and the third-stage Colpitts oscillating circuit sends the signal through the filter amplifier circuit,

The center frequency emitted by the first-stage Colpitts oscillator circuit is , the center frequency emitted by the second-stage Colpitts oscillator circuit is , the center frequency emitted by the third-stage Colpitts oscillator circuit is .

In the ultra-wideband chaotic signal generator, the first-stage Colpitts oscillating circuit includes a resistor R1, one end of the resistor R1 is connected to one end of the inductor L1, and the other end of the resistor R1 is connected to one end of the voltage V1, The other end of the inductor L1 is connected to one end of the switch K1 and one end of the capacitor C1, the other end of the switch K1 is connected to the collector c of the triode Q1, the base b of the triode Q1 is grounded, and the triode The emitter e of Q1 is connected to the other end of the capacitor C1, one end of the capacitor C2, one end of the diode D1 and one end of the resistor R2, the other end of the resistor R2 is connected to one end of the voltage V2, and the other end of the voltage V2 is connected to The other end of the voltage V1 is grounded after the other end of the capacitor C2;

The other end of the diode D1 is connected to one end of the capacitor C3, and one end of the capacitor C3 is connected to one end of the resistor R3, one end of the voltage V5, the emitter e of the transistor Q2, one end of the resistor R4, one end of the capacitor C4, and the capacitor One end of C5 and one end of diode D2, the other end of the resistor R3 is connected to one end of the inductor L2, the other end of the inductor L2 is connected to one end of the switch K2 and the other end of the capacitor C4, the other end of the switch K2 One end is connected to the collector c of the triode Q2, the base b of the triode Q2 is grounded, the other end of the resistor R4 is connected to one end of the voltage V3, the other end of the voltage V3 is connected to the other end of the voltage V5 and the capacitor The other end of C5 is grounded;

The other end of the diode D2 is connected to one end of the capacitor C6, and one end of the capacitor C6 is connected to one end of the resistor R5, one end of the voltage V6, the emitter e of the transistor Q3, one end of the resistor R6, one end of the capacitor C7 and the capacitor One end of C8, the other end of the resistor R5 is connected to one end of the inductor L3, the other end of the inductor L3 is connected to one end of the capacitor C9, the other end of the capacitor C7 and one end of the switch K3, the other end of the switch K3 One end is connected to the collector c of the transistor Q3, the base b of the transistor Q3 is grounded, the other end of the resistor R6 is connected to one end of the voltage V4, and the other end of the capacitor C9 is connected to one end of the capacitor C10 and the inductor L4 The other end of the capacitor C9 is connected to one end of the resistor R7, and the other end of the resistor R7 is connected to the other end of the inductor L4, the other end of the capacitor C8, the other end of the voltage V4, and the other end of the voltage V6 back to ground.

Beneficial effect:

1. The utility model not only has a simple structure and is easy to implement, but also produces an ultra-wideband chaotic signal with a flat and wide spectrum and good autocorrelation performance. The signal will make communication have high confidentiality and low interception rate, and has good anti-multipath Fading characteristics, it has broad application prospects in the fields of radar, communication and positioning.

2. The utility model Colpitts chaotic oscillating circuit 1 is composed of triode Q1, linear inductor L1, linear resistors R1 and R2, linear capacitors C1 and C2, DC voltage sources V1 and V2, and can generate chaos of various frequencies including microwaves. signal; the transistor Q1 is a nonlinear device, which makes the ultra-wideband chaotic signal have good randomness.

3. The central frequency of the utility model Colpitts chaotic oscillation circuit 1 is , the center frequency of Colpitts chaotic oscillator circuit 2 is , the center frequency of Colpitts chaotic oscillator circuit 3 is , the center frequency of each stage of Colpitts chaotic oscillation circuit should be set at the center of the frequency band corresponding to its 3dB bandwidth, so as to obtain a chaotic signal with a wider frequency band.

Description of drawings:

Accompanying drawing 1 is the top view of the utility model,

Accompanying drawing 2 is the main view structure schematic diagram of the utility model,

Accompanying drawing 3 is the circuit board signal block diagram of the present utility model,

Accompanying drawing 4 is the circuit schematic diagram of the present utility model.

Detailed ways:

Example 1

An ultra-wideband chaotic signal generator, the outer shell 1 is loaded with a circuit board, and the side of the outer shell 1 is provided with a first-level center frequency sending interface 2, a second-level center frequency sending interface 3 and a third-level center frequency sending interface The upper surface of the outer casing 1 described in the interface 4 is provided with a function button 5, the left side of the function button 5 is provided with a display screen 6, and the lower side of the display screen 6 is provided with an adjustment button 7;

The bottom end of the outer casing 1 is provided with a bracket I and a bracket II, the bracket I is inserted into the opening I8, and the opening I8 is arranged on both sides of the bottom end of the outer casing 1, and the bracket I includes a rotating shaft I9, the shaft I9 is covered with a shaft sleeve I10, and the shaft sleeve I10 is connected to the supporting leg I11;

A bracket II is set between the two central frequency sending interfaces, the bracket II is set in the opening II17, the bracket II includes a rotating shaft II12, and a leg with a shaft sleeve II is arranged on the rotating shaft II12 II13, outrigger III14 with bushing III, outrigger IV15 with bushing IV and outrigger V16 with bushing V;

The circuit board includes a first-stage Colpitts oscillating circuit, the detuned coupling connection between the first-stage Colpitts oscillating circuit and the second-stage Colpitts oscillating circuit, and the second-stage Colpitts oscillating circuit and the third-stage Colpitts The oscillating circuits are detuned to each other, and the third-stage Colpitts oscillating circuit sends the signal through the filter amplifier circuit,

The center frequency emitted by the first-stage Colpitts oscillator circuit is , the center frequency emitted by the second-stage Colpitts oscillator circuit is , the center frequency emitted by the third-stage Colpitts oscillator circuit is .

Example 2

In the ultra-wideband chaotic signal generator described in Embodiment 1, the first-stage Colpitts oscillating circuit includes a resistor R1, one end of the resistor R1 is connected to one end of the inductor L1, and the other end of the resistor R1 is connected to the voltage V1 One end of the inductance L1 is connected to one end of the switch K1 and one end of the capacitor C1, the other end of the switch K1 is connected to the collector c of the triode Q1, the base b of the triode Q1 is grounded, and the The emitter e of the triode Q1 is connected to the other end of the capacitor C1, one end of the capacitor C2, one end of the diode D1 and one end of the resistor R2, the other end of the resistor R2 is connected to one end of the voltage V2, and the voltage V2 The other end is connected to the other end of the voltage V1 and the other end of the capacitor C2 and then grounded;

The other end of the diode D1 is connected to one end of the capacitor C3, and one end of the capacitor C3 is connected to one end of the resistor R3, one end of the voltage V5, the emitter e of the transistor Q2, one end of the resistor R4, one end of the capacitor C4, and the capacitor One end of C5 and one end of diode D2, the other end of the resistor R3 is connected to one end of the inductor L2, the other end of the inductor L2 is connected to one end of the switch K2 and the other end of the capacitor C4, the other end of the switch K2 One end is connected to the collector c of the triode Q2, the base b of the triode Q2 is grounded, the other end of the resistor R4 is connected to one end of the voltage V3, the other end of the voltage V3 is connected to the other end of the voltage V5 and the capacitor The other end of C5 is grounded;

The other end of the diode D2 is connected to one end of the capacitor C6, and one end of the capacitor C6 is connected to one end of the resistor R5, one end of the voltage V6, the emitter e of the transistor Q3, one end of the resistor R6, one end of the capacitor C7 and the capacitor One end of C8, the other end of the resistor R5 is connected to one end of the inductor L3, the other end of the inductor L3 is connected to one end of the capacitor C9, the other end of the capacitor C7 and one end of the switch K3, the other end of the switch K3 One end is connected to the collector c of the transistor Q3, the base b of the transistor Q3 is grounded, the other end of the resistor R6 is connected to one end of the voltage V4, and the other end of the capacitor C9 is connected to one end of the capacitor C10 and the inductor L4 The other end of the capacitor C9 is connected to one end of the resistor R7, and the other end of the resistor R7 is connected to the other end of the inductor L4, the other end of the capacitor C8, the other end of the voltage V4, and the other end of the voltage V6 back to ground.

Colpitts chaotic oscillation circuit 1 can produce chaotic signals of various frequencies including microwaves, and has good randomness, although it can obtain an ideal chaotic signal with a higher operating frequency, its 3dB bandwidth is not wide; in order to obtain For a chaotic signal with a wider frequency band, the Colpitts chaotic oscillation circuit 1 and the Colpitts chaotic oscillation circuit 2 are coupled through the diode D1 and the capacitor C3, and the Colpitts chaotic oscillation circuit 2 and the Colpitts chaotic oscillation circuit 3 are coupled through the diode D2 and the capacitor C6, Thus, a sufficiently wide bandwidth and a flat distributed frequency spectrum can be obtained; the end of the Colpitts chaotic oscillation circuit 3 is connected in parallel with L4, C9 and C10 to form a filter amplifier circuit, which has the functions of suppressing noise and amplifying.

Colpitts chaotic oscillation circuit 1 is composed of a triode Q1, a linear inductor L1, two linear resistors R1 and R2, two linear capacitors C1 and C2, and two DC voltage sources V1 and V2. By adjusting the values of the DC voltage sources V1, V2 and the resistor R2, the triode Q1 is in the DC amplification region. The oscillation circuit is composed of L1, R1, C1, and C2. By selecting the circuit parameters, the nonlinear device Q1 works alternately in the amplifying region and the cut-off region, so that the Colpitts oscillating circuit enters a chaotic state, and can generate chaotic signals of various frequencies including microwaves. The signal spectrum distribution of Colpitts chaotic oscillator circuit 1 is relatively wide, but its energy is mainly concentrated around the center frequency, and the 3dB bandwidth is small. Using the idea of drive response, Colpitts chaotic oscillation circuit 1 and Colpitts chaotic oscillation circuit 2 are coupled through diode D1 and capacitor C3, and Colpitts chaotic oscillation circuit 2 and Colpitts chaotic oscillation circuit 3 are coupled through diode D2 and capacitor C6.

The Colpitts chaotic oscillation circuit at all levels resonates at different frequencies, and its center frequency increases gradually. In this way, the center frequency is in the range of 0-1.3GHz, the ultra-wide chaotic signal with flat and wide spectrum and good autocorrelation performance is output.

principle:

The setting of the working frequency of the Colpitts chaotic oscillator circuit at all levels should be consistent with its 3dB bandwidth;

In order to meet the complementary relationship of the center frequency of the circuit, it is required that the Q values of the quality factors of the Colpitts chaotic oscillation circuits at all levels be consistent or in a linear relationship; to reduce the Q value;

When the center frequency of the Colpitts chaotic oscillation circuit at all levels is determined, the spectral characteristics of the chaotic signal are adjusted by the coupling capacitor. The spectrum of the chaotic signal is wider, but in order to ensure the normal operation of the circuit, the value of the coupling capacitor should not be too large;

The values of the two DC voltage sources in the Colpitts chaotic oscillation circuit also have an impact on the spectrum of the chaotic signal. Increasing the value of the voltage source can make the spectrum of the chaotic signal generated more flat and uniform

Of course, the above description is not a limitation of the present utility model, and the present utility model is not limited to the above-mentioned examples, and changes, modifications, additions or replacements made by those skilled in the art within the essential scope of the present utility model are also acceptable. Should belong to the protection scope of the present utility model.

Claims (2)

1. a kind of ultra wide band chaotic signal generator, it is characterized in that：Shell body（1）Interior loading circuit board, the shell body（1） Side set first order centre frequency send interface（2）, second level centre frequency send interface（3）With third level centre frequency Send interface（4）The shell body（1）Upper surface set function button（5）, the function button（5）Left side set Display screen（6）, the display screen（6）Downside set regulating key（7）；

The shell body（1）Bottom stent I and stent II are set, the stent I loads opening I（8）In, described opens Mouth I（8）It is arranged on shell body（1）Bottom both sides, the stent I includes shaft I（9）, the shaft I（9）Upper set There is axle sleeve I（10）, the axle sleeve I（10）Upper connection leg I（11）；

Centre frequency described in two sets stent II between sending interface, and the stent II is arranged on opening II（17）It is interior, The stent II includes shaft II（12）, the shaft II（12）On be provided with the supporting leg II of shaft sleeve II（13）, carry The supporting leg III of axle sleeve III（14）, supporting leg IV with axle sleeve IV（15）With the supporting leg V with axle sleeve V（16）；

First order Colpitts oscillating circuits, the first order Colpitts oscillating circuits and are included on the circuit board Off resonance is of coupled connections each other between two level Colpitts oscillating circuits, second level Colpitts oscillating circuits and the 3rd Off resonance is of coupled connections each other between level Colpitts oscillating circuits, and the third level Colpitts oscillating circuits lead to signal Filter amplification circuit is crossed to send,

The centre frequency that the first order Colpitts oscillating circuits are sent is, the second level Colpitts vibrates electric The centre frequency that road is sent is, the centre frequency that the third level Colpitts oscillating circuits are sent is。

2. ultra wide band chaotic signal generator according to claim 1, it is characterized in that：The first order Colpitts shakes Swinging circuit includes one end of one end connection inductance L1 of resistance R1, the resistance R1, the other end connection of the resistance R1 One end of voltage V1, one end of the other end connecting valve K1 of the inductance L1 and one end of capacitance C1, the switch K1 Other end connecting triode Q1 collector c, the triode Q1 base stage b ground connection, the transmitting of the triode Q1 The other end of pole e connection capacitances C1, one end of capacitance C2, one end and one end of resistance R2 of diode D1, the resistance R2 Other end connection voltage V2 one end, the other end of the other end connection voltage V1 of the voltage V2 is another with capacitance C2's It is grounded behind end；

One end of the other end connection capacitance C3 of the diode D1, the one of one end connection resistance R3 of the capacitance C3 End, one end of voltage V5, the emitter e of triode Q2, one end of resistance R4, one end of capacitance C4, one end and two of capacitance C5 One end of pole pipe D2, one end of the other end connection inductance L2 of the resistance R3, the other end connection of the inductance L2 are opened Close the other end of one end and the capacitance C4 of K2, the collector c of the other end connecting triode Q2 of the switch K2, described three The base stage b ground connection of pole pipe Q2, one end of the other end connection voltage V3 of the resistance R4, the other end of the voltage V3 connect It is grounded after connecing the other end of voltage V5 and the other end of capacitance C5；

One end of the other end connection capacitance C6 of the diode D2, the one of one end connection resistance R5 of the capacitance C6 End, one end of voltage V6, the emitter e of triode Q3, one end of resistance R6, one end and one end of capacitance C8 of capacitance C7, institute One end of the other end connection inductance L3 of the resistance R5 stated, one end of the other end connection capacitance C9 of the inductance L3, capacitance One end of the other end of C7 and switch K3, the collector c of the other end connecting triode Q3 of the switch K3, three poles The base stage b ground connection of pipe Q3, one end of the other end connection voltage V4 of the resistance R6, the other end connection of the capacitance C9 One end of capacitance C10 and one end of inductance L4, one end of the other end connection resistance R7 of the capacitance C9, the resistance R7 The other end and the other end of inductance L4, the other end of capacitance C8, the other end of voltage V4, the other end of voltage V6 be connected and be followed by Ground.