Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

A new design of Doherty amplifiers using defected ground structure

Choi, Heungjae, Lim, Jong-Sik and Jeong, Yong-Chae 2006. A new design of Doherty amplifiers using defected ground structure. IEEE Microwave and Wireless Component Letters 16 (12) , pp. 687-689. 10.1109/LMWC.2006.885636

[img]
Preview
PDF
Download (703kB) | Preview

Abstract

In this letter, a new Doherty power amplifier having the ideal harmonic termination condition that has been usually ignored is proposed. A defected ground structure (DGS) is adopted on the ground pattern of the output lambda/4 impedance inverter of the carrier amplifier and output offset transmission line of the peaking amplifier that are essential for proper load modulation operation of a conventional Doherty amplifier. As a result of the second and third harmonic termination, excellent improvement in power added efficiency (PAE), gain, maximum output power as well as linearity is obtained. The acquired improvements in gain, maximum output power (P1 dB), PAE, and adjacent channel leakage ratio to wideband code division multiple access 2FA signal are 0.33 dB, 0.42 dB, 12.7%, and 5.1 dB, respectively. Moreover, physical length of microstrip line is shortened fairly by DGS, therefore the whole amplifier circuit size is considerably reduced

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Additional Information: Sponsored by: IEEE Microwave Theory and Techniques Society
Publisher: IEEE
ISSN: 1531-1309
Last Modified: 04 Jun 2017 03:15
URI: http://orca-mwe.cf.ac.uk/id/eprint/18868

Citation Data

Cited 23 times in Google Scholar. View in Google Scholar

Cited 21 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item

Downloads

Downloads per month over past year

View more statistics