LINEARITY IMPROVEMENT ANALYSIS FOR POWER AMPLIFIERS AT mm-WAVE FREQUENCIES

作者：Valliarampath Joe^*; Sinha Saurabh

来源：Microwave and Optical Technology Letters, 2014, 56(3): 743-748.

DOI：10.1002/mop.28172

<jats:title>ABSTRACT</jats:title><jats:p>This article presents an adaptive predistortion (APD) linearization technique to improve the linearity of millimeter‐wave power amplifiers (PAs), specifically at 60 GHz. The PA and the APD were designed using the 0.13 µm SiGe BiCMOS process. The predistortion is applied to the PA by varying the gain of the PA through its variable gain amplifier. The PA achieves a P<jats:sub>SAT</jats:sub> of 11.97 dBm and
<jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/mop28172-math-0001.gif" xlink:title="urn:x-wiley:08952477:media:mop28172:mop28172-math-0001" /> of −10 dBm. After linearization the PA has an improved
<jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/mop28172-math-0002.gif" xlink:title="urn:x-wiley:08952477:media:mop28172:mop28172-math-0002" /> of −6 dBm. This linearization technique results in an optimum intermodulation distortion 3rd reduction of 10 dB.

• 出版日期2014-3