A high‐gain dual‐band distributed amplifier (DBDA) based on the dual‐composite right/left handed transmission line (D‐CRLH TL) is presented. Both forward and reverse gains of the DAs are simultaneously available, when their conventional TLs are replaced by the metamaterial TLs. To improve the performance of the DBDA, a new D‐CRLH with a narrower stop band than the conventional D‐CRLH is proposed....
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