Chaotic behavior in receiver front-end limiters

Abstract—A delay nonlinear differential equation is proposed to investigate the condition of the microwave chaotic behavior existing between the antenna and the front-end protection circuit of a receiver such as the radar front-end limiter circuit. This investigation concerns the case of intentional or unintentional signals applied to the antenna outside of its bandwidth. Bifurcation diagrams show that the chaotic behavior appears for antenna impedance up to 10Ω and for amplitudes greater than 1.2V. Electrical simulation results agree well with theoretical ones. 1