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Micromachines 2017, 8(4), 118; doi:10.3390/mi8040118

A Suspended Six-Port Transformer-Based Power Divider for 2.4 GHz Applications

Department of Electrical Engineering, National Sun Yat-sen University, 70 Lienhai Rd., Kaohsiung 80424, Taiwan
Author to whom correspondence should be addressed.
Academic Editor: Jeong-Bong Lee
Received: 25 January 2017 / Revised: 31 March 2017 / Accepted: 5 April 2017 / Published: 8 April 2017
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This paper presents a transformer-based power divider with six-port suspending structure for 2.4 GHz wireless applications. The proposed power divider, which is featured with chip size (2.9 mm × 2.8 mm × 21 μm), was constructed by an 8-μm-thick Cu bottom electrode, a 5 μm-height supporting copper post, and an 8-μm-thick suspended spiral copper conducting layer with a 13 μm air gap. The main structure included two transformers and six input/output matching capacitors for simultaneously achieving two single-to-differential paths so that the chip size of the complex multiple-ports transceiver could be reduced. According to the results, the proposed divider has characteristics of the radio frequency (RF), and its input return losses are around −10 dB, output return losses are beneath −10 dB, and minimum amplitude imbalance is below 1.5 dB and less than 1° phase imbalance at 2.4 GHz operating frequency. View Full-Text
Keywords: transformer-based; power divider; six-port; suspending structure; wireless applications transformer-based; power divider; six-port; suspending structure; wireless applications

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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. (CC BY 4.0).

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Huang, W.-H.; Huang, I.-Y.; Syu, W.-H.; Sung, C.-L.; Hsieh, C.-H. A Suspended Six-Port Transformer-Based Power Divider for 2.4 GHz Applications. Micromachines 2017, 8, 118.

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