Dual-polarized frequency-scanning phased-array antenna based on composite right/left handed serial feed network

A dual-polarized frequency-scanning phased-array antenna based on composite right/left handed (CRLH) feed network is presented. The proposed feed network provides phase advance in addition to phase delay and allows uniform power distribution to each antenna element, thereby delivering high directivity frequency-scanning radiation beams that can scan the full-hemi-sphere. The working mechanism is presented through a broadband microstrip antenna. The orthogonally placed feed networks and coupling slots enable the dual-polarized (horizontal/vertical) operation of the proposed antenna array without compromising the high isolation between two feeding ports. Full space frequency-scanning capability for both polarization states are verified experimentally.