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International Journal of Antennas and Propagation
Volume 2015, Article ID 373179, 7 pages
Research Article

Compact Wideband Antiparallel Diode Frequency Triplers Utilizing Planar Transitions

School of Electronics Engineering, Kyungpook National University, Sankyuk-dong, Buk-gu, Daegu 702-701, Republic of Korea

Received 9 September 2014; Revised 5 December 2014; Accepted 6 December 2014

Academic Editor: Yuan Yao

Copyright © 2015 Wahab Mohyuddin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Two designs of frequency triplers, which use planar transitions as baluns and an antiparallel diode pair to achieve wide bandwidth, are presented. The ultrawideband transitions are utilized for input and output impedance matching of the frequency triplers. The design process and operation principles are described in this paper. The implemented frequency triplers exhibit flat response over wide frequency range of 3 to 9 GHz. The proposed Type A frequency tripler shows conversion loss of ~18 dB with above 30 dB even harmonics suppression. With Type B frequency tripler, conversion loss of ~17 dB and above 25 dB even harmonic suppression are achieved.