Erick Emmanuel Djoumessi and Ke Wu
Article (2014)
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Open Access to the full text of this document Published Version Terms of Use: Creative Commons Attribution Download (898kB) |
Abstract
This paper describes the design and measurement of a varactor-tuned planar diplexer for reconfigurable multi-mode/multi-standard transceiver front-end modules. The proposed diplexer of 3 cm × 1.8 cm is composed of two tunable dual-mode bandpass filters with two varactor diodes. The diplexer channels are 8.8% relative bandwidth at 2.48 and 3.2 GHz for 25 V biased voltage, while 7.5% and 4.1% are obtained at 2.075 and 2.606 GHz for 5 V, respectively. The center-frequency tunability for lower and upper channel filters bands are 21.4% and 20.4%, respectively. Measured insertion loss varies from 2.4 to 4.8 dB and 2.8 to 5 dB for the two channels over the tuning frequency range with better than 30-dB isolation. The lower channel filter (with higher capacitance) presents a better 1-dB compression measurement point (P-1dB) over the tuning frequency range.
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Subjects: |
2500 Electrical and electronic engineering > 2500 Electrical and electronic engineering 2500 Electrical and electronic engineering > 2512 Broadcasting |
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Department: | Department of Electrical Engineering |
Research Center: | POLY-GRAMES - Advanced Research Centre in Microwaves and Space Electronics |
PolyPublie URL: | https://publications.polymtl.ca/4854/ |
Journal Title: | Universal Journal of Electrical and Electronic Engineering (vol. 2, no. 7) |
Publisher: | Horizon Research Publishing |
DOI: | 10.13189/ujeee.2014.020703 |
Official URL: | https://doi.org/10.13189/ujeee.2014.020703 |
Date Deposited: | 17 Mar 2021 10:58 |
Last Modified: | 28 Sep 2024 09:10 |
Cite in APA 7: | Djoumessi, E. E., & Wu, K. (2014). Tunable diplexer for cognitive radio RF front-end modules. Universal Journal of Electrical and Electronic Engineering, 2(7), 278-285. https://doi.org/10.13189/ujeee.2014.020703 |
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