zigzag slot click

This paper proposes the new design of compact ultra wideband (UWB) 3 dB coupled-line coupler and 90° power divider. The proposed coupler utilizes zig-zag-shaped slot at the ground plane underneath microstrip coupled-line to enhance the bandwidth and coupling strength significantly. The technique has alleviated the need of a very narrow spacing between parallel coupled-line for easier ... m 77 casino slot