Design and Research on a Reconfigurable Microwave Photonic Mixer
A design and research scheme for a reconfigurable microwave photonic mixer is proposed.The scheme can reconstruct and generate a linear frequency modulation signal,a frequency conversion signal,or a phase shift signal only by changing the driving signal and direct-current bias voltage.The generated linear frequency-modulated signal has three bands,and the bandwidth can be increased to four times at most.Up and down conversion signals can be generated at the same time.The obtained phase shift signal can be continuously tuned at 0-360°.The simulation results show that the scheme can generate linear frequency-modulated signals with a frequency of 11 GHz and a bandwidth of 2 GHz,a frequency of 18 GHz and a bandwidth of 4 GHz,and a frequency of 29 GHz and a bandwidth of 2 GHz.The pulse compression performance is good.It can simultaneously generate an up-conversion signal with a frequency of 32 GHz and a down-conversion signal with a frequency of 8 GHz,and the electric stray suppression ratio is higher than 30 dB.It can also generate a continuously adjustable phase-shift signal with a 0-360° phase,and the power fluctuation is within 0.1 dB.The system has a spurious free dynamic range of 114.1 dB·Hz2/3.
optical communicationmicrowave photonmixed frequencylinear frequency modulationphase shift
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