Two-stage ultra wide band Colpitts chaotic oscillator

Abstract

The invention discloses a two-stage ultra wide band Colpitts chaotic oscillator, which comprises a frequency selection network unit, a first-stage bias unit, an inter-stage coupling unit, a second-stage bias unit, radio frequency triodes and an output unit, wherein the radio frequency triodes comprise a first radio frequency triode Q1 and a second radio frequency triode Q2. The two-stage ultra wide band Colpitts chaotic oscillator is based on a traditional Colpitts chaotic oscillator, the frequency selection network unit adopts a common collector to replace a common base, and an output signalof the first-stage bias unit is output by a collector, so that the oscillation amplitude of a chaotic signal is improved; the on-load capacity of a chaotic circuit is improved, so that the chaotic signal output frequency spectrum is flatter, and the circuit is more suitable for the field of ultra-wideband communication; and the amplitude of the frequency spectrum of a high-frequency signal is improved through energy storage, and the output of a ultra-wideband chaotic signal is realized.

Description

Technical field [0001] The present invention relates to the field of ultra-wideband communication, and more particularly to a two-stage ultra-wideband colpitts chaotic oscillator. Background technique [0002] Ultra-wideband signals have been widely used in communication, especially personal local communication situations and short-range communication situations, and the frequency band of ultra-wideband signals is 3.1 GHz-10.6GHz, which is given by IEEE 802.15.4a. Chaotic signals have a broadband, nonlinearity, etc., is one of the effective ways to develop broadband communications, spread spectrum communications, etc., thereby studying the ultra-wideband chaotic oscillator as one of the current hotspots. [0003] Experiments and research demonstrated that a variety of circuit structures can produce chaotic signals, including the Württe Bridge oscillator, Cai Circuit, and Recallogenic Circuit, etc., the top two circuit output signals are low, and the bandwidth is narrow, the main ...

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Problems solved by technology

[0003] Experiments and research have proved that a variety of circuit structures can generate chaotic signals, including Wien bridge oscillators, Chua's circuits, and memristor oscillation circuits. The first two circuits output signals with low fundamental frequency and narrow bandwidth. The main reason is that The amplifier is used in the circuit as the main component to generate nonlinear signals. The processing speed of the amplifier directly determines the frequency and bandwidth of the signal, so the output signal is generally at the KHz and MHz level, which obviously cannot be applied to ultra-wideband communication scenarios; the memristive oscillator circuit The structure is simple, and the non-linearity is provided for the circuit by the memristor, but the signal frequency generated at present still cannot meet the communication field of high fundamental frequency and broadband

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