Wilkinson power divider based on composite right-/left-handed transmission-line

Based on composite right/left-handed transmission-line (CRLH TL), a novel Wilkinson power divider with parallel feeding configuration is presented. The feasibility of changing the conventional TL to the CRLH TL in Wilkinson power divider is proved by even/odd-mode method, and the changing effectively reduces the size of the power divider. With the milder phase-frequency characteristics of the CRLH TL, the bandwidth of the novel CRLH TL power divider is expanded. The experimental results show that the novel CRLH TL power divider provides large bandwidth enhancement and area reduction compared to the conventional one. In addition, compared to the CRLH TL power divider with series feeding configuration, the great phase consistency in every output port is due to the symmetric structure of the novel CRLH TL Wilkinson power divider, which has better isolation for the presence of isolation resistors.