Table of Contents
International Journal of Microwave Science and Technology
Volume 2007 (2007), Article ID 86583, 5 pages
Research Article

On Miniaturizing On-Chip Microstrip Inductors Using Embedded Radiating Dipoles

1Graduate School of Electro-Optic and Material Science, National Formosa University (NFU), 64 WenHua Road, Huwei 632, Taiwan
2Advanced Research & Business Laboratory (ARBL), No. 6C, 88-8, Ta-Tun 20th Street, Taichung 407, Taiwan

Received 7 January 2007; Revised 6 March 2007; Accepted 7 March 2007

Academic Editor: Kamya Yekeh Yazdandoost

Copyright © 2007 Chungpin Liao 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.


As RF mixed-signal and patch-antenna-equipped SOC devices are becoming the dominant products worldwide, concerns over the large real-estate consumption by the spiral inductors (including those for microstrip antennas and impedance-matching inductances), as well as their generally Q-low (quality factor) performance, are now being discussed more than ever. Liao et al. have recently addressed the Q-low issue via using location-selective proton beam bombardment, whereby Q-improvements of 100%300% were evidenced. That success, nevertheless, is at times tarnished by some undesirable features, that is, the explosive rises of inductances near certain frequencies, which practically cut short the Q-enhancement and were identified to be due to resonant interactions between the inductor-propagating EM wave and the proton-caused defect dipoles. In this paper, however, the authors attempt to turn this resonance-caused undesirability to favor by proposing a new way to greatly shrink down the needed inductor size through dipoles engineering.