LAUSR

In this study, a compact single-layer substrate-integrated waveguide (SIW) monopulse slot antenna array is designed. The antenna has a very simple structure and uses SIW-based cavity resonators, instead of a complex feeding network and monopulse comparator, to excite the slot array. The design decreases the size of the feeding network and monopulse comparator by applying cavity resonator principles to the monopulse slotted antenna array, resulting in an obvious improvement of the antenna aperture efficiency and structure complexity. This single-layer scheme, combined with a planar transmission line, is ideal for integration with planar circuits. A 16-element slot array prototype operating at 5.83 GHz is fabricated through a low-cost standard printed circuit board process to validate the design. The simulated and measured results are presented, and good agreement between them is obtained.