This paper presents a novel design of a penta band antenna which operates at ten (Deca) different frequencies (0.86 GHz, 1.57 GHz, 2.2 GHz, 2.82 GHz, 3.53 GHz, 7.1 GHz, 7.6 GHz, 8.3 GHz, 8.9 GHz, and 9.4 GHz) covering 5 different frequency bands (NATO C Band, L, S, C and X) bands. To achieve multi band operation, multi ring slotted circular patch is designed with dual port microstrip feed line. In this design Rogers RT Duroid 5880 substrate is sandwiched between circular multi ring structured patch and ground plane. The antenna is modeled and simulated using HFSS software. Since the antenna operates at five different bands and results in ten different frequencies hence called penta band, deca frequency antenna.