AbstractThis article presents the use of ceramic composite composed of Li2MoO4 and 9 vol% of BaTiO3 to realize compact weight optimized circular polarized GPS antenna. The ceramic substrate for the antenna was fabricated with a room‐temperature densification method based on the use of a small amount of an aqueous phase of Li2MoO4 and subsequent recrystallization. A square patch (FT‐FB) was used as a reference patch antenna. This was then compared with a double curved patch antenna (CT‐CB) and a curved patch with a flat bottom (CT‐FB). It was observed that the axial ratio and radiation patterns of the different patch antennas were very similar. In simulations, the FT‐FB patch had peak total efficiency of −2.2 dB, followed by the CT‐CB patch with total efficiency of −2.5 dB and the CT‐FB patch with total efficiency of −2.7 dB. The mass of the FT‐FB and CT‐CB antennas were 12.66 g, while the mass of the CT‐FB antenna was only 9.44 g. Thus, a weight reduction of 25.4% was obtained. Ease of fabrication using Li2MoO4‐based composite ceramic helps in creating an optimal antenna design for size and weight‐constrained mobile devices such as drones.