Measurement scheme of radar cross section with time gating

摘要

This paper proposes measurement scheme of radar cross section (RCS). The measurement of quasi monostatic radar channel is done in anechoic chamber. The time gating technique is used for removing the effect of mutual coupling between transmitter (Tx) and receiver (Rx) antennas. The personal computer (PC) case is used as the target under test (TUT). The vector network analyzer (VNA) is used to measure transmission coefficient in frequency range covered ultra wideband (UWB) that is 3-11 GHz. The double-ridged waveguide horn antennas are used as Tx and Rx antennas with vertical polarization. The complex frequency transfer function at each angle is used to evaluate the RCS of TUT. The RCS with time gating are shown and compared with that without time gating. From the results, we can see that the proposed measurement scheme can be increased the accuracy of RCS that evaluated from quasi monostatic radar with dense mutual coupling between Tx and Rx antennas.