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Design of Highly Linear Power Amplifier using Bandpass Filter based on Metamaterial Structure  

Kim, Hyoung-Jun (Information and Telecommunication Engineering, Soongsil University)
Seo, Chul-Hun (Information and Telecommunication Engineering, Soongsil University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.49, no.1, 2012 , pp. 68-72 More about this Journal
Abstract
In this paper, highly linear power amplifier using bandpass filter based on metamaterial and Composite Right- / Left-Handed (CRLH) structure is proposed. The proposed bandpass filter consist of the series capacitor, series microstrip line and the parallel inductor, parallel microstrip line. The insertion loss is minimized at operation frequency and the $2^{nd}$ harmonic is suppressed by the bandpass filter using the CRLH structure. And we improved the Adjacent Channel Leakage Ratio (ACLR) using the characteristic of the proposed bandpass filter. At 2.14 GHz, we have obtained the output power of 38.83 dBm, the $2^{nd}$ harmonic of .61.33 dBc, the $3^{rd}$ IMD of .54.67 dBc, and ACLR of .51.33 dBc at 5 MHz offset, -56.50 dBc at 10 MHz offset, respectively.
Keywords
Power amplifier; CRLH(Composite Right-/Left-Handed); Metamaterial; Linearity; Bandpass filter;
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