Integrated Radiation and Scattering Reconfiguration Broadband Array Based on Antenna Mode Scattering

In this letter, a multifunctional broadband array with integration of radiation and scattering reconfiguration is proposed. Firstly, the switching method of the array radiation and scattering field is analyzed theoretically. It follows that the radiation and scattering functions share the same array structure with low structure mode scattering field (SMSF), and the switchable impedance feed network design for the antenna mode scattering (AMSF) reconfiguration. With the different PIN diode switching and using the approximate open and short impedance of the feed network, the antenna enables reconfiguration between radiation and 1-bit reconfigurable scattering states. As a result, the array maximizes the use of received energy to achieve large dynamic range monostatic radar cross section (RCS) reconfiguration, and achieves the multifunctional of radiation and scattering within the broadband. Simulation results show that the antenna RCS reconfiguration bandwidth is 4.65 ∼ 6.35 GHz with the 10 dB reconfigurable value, the maximum reconfigurable value is 26.5 dB, and radiation performance is maintained in 5.25 ∼ 6.4 GHz. It is adapted to the demand for multifunction and scattering modulation in Internet of Things (IoT) applications. The measured results show good agreement with the simulated results.