1、2850 英文单词， 14500 英文字符 ， 中文 4500 字 文献出处 :Hayati M, Roshani S. A broadband Doherty power amplifier with harmonic suppressionJ. AEU-International Journal of Electronics and Communications, 2014, 68(5): 406-412. A broadband Doherty power amplier with harmonic suppression M. Hayati, S. Roshani Abstract I
2、n this paper, the design and implementation of the broadband, Doherty power amplier (DPA) with 2nd and 3rd harmonics suppression, with theoretical analysis is presented. In the proposed structure a novel harmonic suppressed Wilkinson power divider used in DPA, which results in harmonic suppression w
3、ith high level of attenuation. Moreover the proposed DPA has major advantages in terms of the linearity and works on a wideband frequency range (2.12.7 GHz) with minimum 40% drain efciency (DE). The linearity of the proposed DPA is increased extremely, which signicant improvement (7 dBm) is achieved
4、 from the main amplier. In the proposed DPA, the main and the auxiliary ampliers are implemented using Class-AB and Class-C topology respectively with equal MRF6S27015N MOTOROLA transistors in LDMOS technology. Keywords: Doherty power amplier (DPA); Harmonic suppression; High efciency; Power amplier
5、 (PA) ;Wideband 1. Introduction Nowadays, the rapidly rising power consumption has been occurred by the extensive use of spectrum-efcient modulation techniques, the increasing demand for higher data rates and the growing number of wireless communications users. The energy efciency of base stations s
6、hould be constantly improved in order to reduce the power loss. Signicant energy savings can be achieved by improving the efciency of the power amplier (PA) of RF transmitters used in the base station 1. Different techniques have been proposed to increase the efciency of power ampliers. Envelope elimination and restoration (EER) 2, envelope tracking (ET) 3, Doherty ampliers 4 and varactor-based dynamic load modulation 5 are the most common techniques being proposed
