This paper presents a compact frequency reconfigurable antenna for IRNSS applications. The proposed antenna can switch the frequency between L5-band and S-band. The reconfigurability for the designed antenna is achieved by incorporating RF PIN (three) diode between the radiating element and resonance slot. The proposed antenna is resonated at 1.1753 GHz (1.16 GHz to 1.19 GHz) and 2.4895 GHz (2.47 GHZ to 2.51 GHz) with ON and OFF condition of PIN diodes, respectively. It is compact and low profile structure with maximum gain of 8.51 dBi with low cross polarization (CP) of approximate < -30 dB. © 2020 IEEE.