Abstract: A novel wide band planar Magic-T is presented.It is designed based on the traditional principle of microstrip hybrid ring.By employing coupling microstrip-slotline configuration,its bandwidth is improved.Microstrip-slotline T-junction is used to achieve the in-phase and out-phase coupling characteristic.The operation bandwidth of this magic-T is from 4.3 to 5.6 GHz centered at 5 GHz,which is over 25% for return loss lower than-10 dB.Furthermore,it is also shown that its insertion loss is lower than 1 dB and the isolation between each port pairs are lower than-30 dB and-20 dB over the operation frequency band respectively.