We present a design and an implementation of a multistage negative group delay circuit. It is small in size and has a compact circuit. Each stage of the multistage circuit is composed of three lumped resonators with resisters. To obtain the good reflection, the resonators are arranged in the π circuit. We discuss the principle of the negative group delay circuit and apply the circuit to the feed-forward amplifier. The delay line of the distortion cancellation loop is shortened 40% by connecting the circuit to the driver stage of the error amplifier. The efficiency of the feed-forward amplifier has been improved from 9% to 12%.
|出版ステータス||Published - 2008|
|イベント||2008 IEEE International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, IWAT 2008 - Chiba, Japan|
継続期間: 2008 3月 4 → 2008 3月 6
|Conference||2008 IEEE International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, IWAT 2008|
|Period||08/3/4 → 08/3/6|
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