Dual circularly polarized radial line slot antennas Takahashi, M. ; Ando, M. ; Goto, N. ; Numano, Y. ; Suzuki, M. ; Okazaki, Y. ; Yoshimoto, T. Abstract Publication: IEEE Transactions on Antennas and Propagation Pub Date: August 1995 DOI: 10.1109/8.402208 Bibcode: 1995ITAP...43..874T