A Novel Reflective Surface for an UHF Spiral Antenna Kramer, B. ; Koulouridis, S. ; Chen, C. -C. ; Volakis, J. Abstract Publication: IEEE Antennas and Wireless Propagation Letters Pub Date: December 2006 DOI: 10.1109/LAWP.2005.863613 Bibcode: 2006IAWPL...5...32K