Development of a Wideband Slotted Antenna Array with Low Profile and Low Sidelobe (Invited Paper)

In this paper, a novel multi-layered waveguide-fed slotted cavity antenna array operating in the K-band (i.e., 18–27 GHz) is presented. The composed of 64 (8 × 8) groups 2 subarrays with low profile, and fed by 1–64 ways waveguide corporate-feed-network. order to obtain sidelobe level (SLL), Chebyshev power distribution introduced into feeding network accurately taper among subarrays. To realize amplitude-tapering network, simple T-junction, which can provide equal phase but unequal power, used. analyzed validated using finite element method (FEM). Simulation results demonstrate that proposed achieve broad bandwidth 21.9%, good gain as 29.1 dBi. Additionally, first SLL be small ?28.3 dB ?20 E-plane H-plane, respectively. overall size 169.6 7.23 mm3.