Compact planar magic-T using half mode substrate integrated waveguide and slotline coupling

Summary form only given, as follows. A new magic-T using HMSIW and slotline coupling is presented. Due to the metal ground inserted into the middle of the substrate, the power divider has a 180° reverse phase. A slotline in the middle ground can couple the energy and functions as the H-arm of magic-T. A Ku-band magic-T is fabricated, good agreement between the measured and simulated results is observed, indicating that the planar magic-T has bandwidth of 18.3%, the amplitude and phase imbalances are less than 0.23 dB and 2.0°.