In this paper, a novel dual-band axially symmetrical quasi-self-complementary (AS-QSC) antenna is designed and fabricated on Liquid Crystal Polymer (LCP) film. Compared to the conventional ASQSC structure, two transmission bands are created by integrating both H–shaped monopole and Lshaped notch together. The bandwidth of 10–dB return loss for each of two separate impedance bands is 430 MHz (centered at 3.95 GHz) and 520 MHz (centered at 5.5 GHz), respectively. The simulated radiating pattern and gain performance of the proposed antenna are shown and further investigated. The processes to reduce the overall size and improve the radiating patterns are demonstrated. The simulation results agree well with measured results.