In this work, a broadband transmissive type linear-circular polarizer with wide angular stability is demonstrated. It shows a 3 dB Axial Ratio (AR) bandwidth of 21.05 GHz (from 20.17 - 41.22 GHz) with 68.58 % fractional bandwidth (FBW) covering K and Ka-bands. The angular stability of the converter is examined, and it possesses a stable AR response up to 50° (for φ = 0°) and 40° (for φ = 90°). The design is compact with the periodicity of 0.107L x 0.141L, where L is the free-space wavelength corresponding to the lowest frequency over the broadband. Authors' strongly believed that the proposed design has broadband 3 dB AR, better angular stability, and compactness made it suitable for countervailing the effect of Faraday rotation in satellite communication applications. © 2021 IEEE.