A NOVEL COUPLE-TYPE POWER DIVIDER WITH LARGE-ANGLE LOW-LOSS CHARACTERISTICS

A novel large-angle low-loss direction-coupler type power divider with designed ratio between output waveguides is proposed. The radiation l oss is greatly reduced by using a micro-prism at the bend corner to co mpensate the phase mismatch due to bending. A normalized transmitted p ower of the power divider with a bend angle of 10 degrees simulated by the semivectorial beam propagation method is about 93%, which is much larger than those were reported for single-mode waveguides. Applicati on of more micro-prisms is also shown. The calculated loss of a symmet ric large-angle 3-dB directional coupler with eight micro-prisms is le ss than 0.953 dB.