| Popis: |
A novel feed network based on the microstrip/slotline transition is proposed in this paper. This feed network not only has ultra-wide impedance bandwidth but also can improve space utilization and make the design of antenna array easier. Then an ultra-wideband (UWB) antenna array with four elements fed by the network is designed. The antenna array is simulated, manufactured and measured. The results show that the impedance bandwidth with return loss under i10dB is 88.76%, from 2.35GHz to 6.1GHz. Within the impedance bandwidth, the radiation performance is satisfactory, and the gain of the array is 2.1{7.1dB, higher than that of the element. The cross-polarization level of the array is lower than i20dB, just as the element. A reasonable agreement of results is achieved between simulation and measurement. |
