Numerical simulation on the stealth characteristics of twin-vertical-tails for fighter

In order to reduce the radar cross section (RCS) of fighter, the twin-vertical-tails effect on the RCS character of fighter was studied. The 3D digital fighter prototype was meshed. The RCS character effect of head, side and tail in three-surface fighter when twin-vertical-tails had a same deflection to two direction based on physical optics method was simulated. The electromagnetic testing on prototype fighter shrunk on a certain scale was made. The practicality of the physical optics method and the accuracy of numerical simulation were verified. The simulation results show that the side RCS of three-surface fighter reduced to 9.8% of what it had been, but the head and tail RCS had a little change when twin vertical fins deflected from 0° to 10°.