Design of Broadband and Ultra-Wide-Angle Low-RCS Open-Ended Cavity Based on Phase Cancellation

Table 1

Comparison with other previous work.

Ref.	Type	RCS reduction frequency band (GHz)	Fractional bandwidth (%)	Wide-angle performance (°)
[9]	Shape optimization	0.3, 1.2, 4.8	—	90-180
[16]	Radar absorbing coatings	10	—	-40~40
[17]	Radar absorbing material	2.4~4.8	66.67	90~180
[20]	Absorber	10	—	0, 15, 30, 45, 60
[23]	Random coding metasurfaces	8, 9, 10, 11, 12	—	10~80
This work	PCM	6.3~13.2 (for TE polarization); 7.8~13.4 (for TM polarization)	70.77 (for TE polarization); 52.83 (for TM polarization)	-180~180 (for TE and TM polarization)