Polaiah, G.Krishnamoorthy, K.Kulkarni, M.2020-03-302020-03-3020192019 URSI Asia-Pacific Radio Science Conference, AP-RASC 2019, 2019, Vol., , pp.-https://idr.nitk.ac.in/handle/123456789/7669In this paper Quatrefoil shape CPW-Fed monopole antenna and slot antenna operating at GSM1800 MHz and UMTS2.1 GHz cellular bands are proposed. Simulated results show that the radiation efficiency of CPW fed monopole antenna and slot antenna at GSM1800 MHz and UMTS2.1 GHz are 93% and 81% respectively. Similarly the realized gains of monopole antenna and slot antenna operating at GSM1800 MHz and UMTS 2.1 GHz are 2.49 dB and 2.2 dB respectively. � 2019 URSI. All rights reserved.Book chapter