A Design of Microstrip Antenna for Through-wall Radar

In this paper, a transceiver microstrip antenna which can be used for through-wall radar has been designed at S-band. The transceiver antenna consists of two identical antenna arrays, one is the transmitting antenna, the other is the receiving antenna, and the structure of them is 2 by 1 microstrip line fed rectangular patch antenna array, which can provide good directivity and high gain. The barbell shaped slot in patch is used to extend impedance bandwidth. The resonant ring between the transmitting and receiving antenna arrays can effectively improve the isolation. The antenna has a bandwidth of 0.64GHz from 2.96 to 3.60GHz, the gain in the vertical direction of antenna plane has exceeded 10.5 dBi.