A novel butterfly-shaped patch antenna for wireless communication is introduced in this paper. The antenna is designed for\nwideband wireless communications and radio-frequency identification (RFID) systems. Two symmetrical quasi-circular arms and\ntwo symmetrical round holes are incorporated into the patch of a microstrip antenna to expand its bandwidth.The diameter and\nposition of the circular slots are optimized to achieve a wide bandwidth. The validity of the design concept is demonstrated by\nmeans of a prototype having a bandwidth of about 40.1%. The return loss of the butterfly-shaped antenna is greater than 10 dB\nbetween 4.15 and 6.36GHz.The antenna can serve simultaneously most of the modern wireless communication standards.
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