A high-efficiency Class-F power amplifier using double CRLH-TL for LTE application
A high-efficiency Class-F power amplifier using double CRLH-TL for LTE application
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适用于 LTE 应用的使用双 CRLH-TL 的高效 F 类功率放大器
DOI：
10.1109/icept.2014.6922886
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Long Chen
中科院分区：
文献类型：
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作者：
Xian;Yonglun Luo;Y. Zhang;Xiaolei Ma;Pu;Long Chen
介绍了一种特殊形式的超材料CRLH TL（复合右手/左手传输线）在F类功率放大器设计中的应用。由于CRLH-TL的窄带特性，将其应用于F类功率放大器的设计中，不仅可以简化功放电路的拓扑结构，而且可以提高功率附加效率，实现双频F类功放。提出了一种工作在5.2GHz和7.8GHz的四分之一波长（λ/4）开路短截线CRLH-TL，并首次应用于F类功率放大器的输入输出谐波控制网络中，从而降低了器件对二、三次谐波阻抗终端的敏感性。结果，获得了小型化和高效率的F类PA。在2.570 ~ 2.620GHz范围内，用10 W Cree GaN HEMT器件测得大于77%的PAE，输出功率为40.5-41.1dBm，二次谐波功率比小于-30.1dBc，三次谐波功率比小于-29.2dBc。据作者所知，82%的效率代表了从长期演进（LTE）频带PA获得的最佳性能。
This paper describes a special form of metamaterials CRLH-TL (Composite Right/Left-Handed Transmission Line) applied to the design of high-efficiency Class-F power amplifier (Class-F PA). Due to CRLH-TL's dull-band characteristic, the CRLH-TL used to the Class-F power amplifier design can not only simplify the topology of PA circuit, but improve power additional efficiency (PAE) and realized the dual-band Class-F PA. The dull-band quarter-wavelength (λ/4) open-circuit CRLH-TL stub working at 5.2GHz and 7.8 GHz is proposed and firstly applied in input and output harmonic control networks for the Class-F PA, thus reducing the device sensitivity to second and third harmonic impedance terminations. As a result, a miniaturized and highly-efficient Class-F PA is obtained. Using a 10-W Cree GaN HEMT device, greater than 77% PAE has been measured from 2.570GHz to 2.620GHz, with output powers of 40.5-41.1dBm and second and third harmonic power ratios below -30.1dBc and -29.2dBc, respectively. To the best of the author's knowledge, the 82% efficiency represents the best performance obtained from a long-term evolution (LTE) band PA.