類比預失真的優點具有體積小、成本低、複雜度低、損耗可控性等，且整合性較高。我們將會設計出 2-W、10-W功率放大器，再將類比預失真電路整合至2-W功率放大器，以改善非線性失真干擾。在本文中，我們重複的實驗找出一套具有邏輯性的設計，實驗結果顯示， 2-W 功率放大器結合無偏壓預失真電路造成的衰減僅有 1.5 dB，當三次諧波的標準為 -30 dBm時，預失真器可以改善單一載波的輸出功率從18.73 dBm 到22.48 dBm，我們用 1.5 dB 的損失換取單一載波輸出功率 3.75 dB。

The advantages of analog predistorter are small size, low cost, low complexity, controllable loss, and high integration. We design both two watt and ten watt power amplifier. The two watt power amplifier is integrated with analog predistorter to improve the nonlinear distortion interface. In this thesis, we repeat the experiment to find the logical design of predistorter. The experiment result of two watt power amplifier using bias free predistorter shows the loss only 1.5 dB. The predistorter can improve output power of each carrier from 18.73 dBm to 22.48 dBm when IM3 is -30dbm. We trade loss of 1.5 dB for output power of 3.75 dB.

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