Dielectric materials like Alumina (Al₂O₃) have been used for design of microwave antennas. However, due to material properties and difficulty in fabrication, it is not suitable for L, C, X and Ku-Band frequencies applications between 1-15 GHz. Polymer materials like Nylon, Teflon, polyacetal, polypropylene etc., however, have shown good gain and radiation characteristics at these frequencies and are easily fabricated with different design profiles. The polymer materials considered suitable for microwave antennas should have fairly large dielectric constant e_r (between 1.5-10) and relatively small tan d loss factor (< 0.001) at these frequencies. The paper presents material characteristics, antenna profiles and gain-radiation characteristics of some important polymer microwave antennas that have found wide acceptance in the industry.