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absorbing material according to Eq according to Fig amplifier antenna current AT/D beam forming biconical antenna carrier-free cavity resonator circuit of Fig component constant current i(t delay circuits derivative di/dt digit distortions driving voltage electric and magnetic electric field strength electromotive force energy patterns equal filter finite Fourier series frequency hopping grad Harmuth Hence Hertzian electric dipole hybrid coupler impedance infinite input integral interval large-current radiator length magnetic dipole magnetic field strengths Maxwell's equations monopulse near-zone noise nonsinusoidal waves obtain from Eq output terminals output voltages plots Poynting's vector produced pulses in Fig radar received rectangular pulse resonating result Section sensor sensor array shown in Fig shown in line shows signal signal-to-noise ratio sinusoidal functions sinusoidal waves sliding correlator slope processor slot antenna solution square wave theory transmission trapezoidal pulse triangular pulse voltage uD wave front wave impedance waveguide whereas yields zero zone