Akira Saitou, Kyoung-Pyo Ahn, Hajime Aoki, Kazuhiko Honjo, Koichi Watanabe. Ultra-Wideband, Differential-Mode Bandpass Filters with Four Coupled Lines Embedded in Self-Complementary Antennas. IEICE Transactions, 90-C(7):1524-1532, 2007. [doi]
Abstract is missing.