Erick Emmanuel Djoumessi and Ke Wu
Article (2014)
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Published Version Terms of Use: Creative Commons Attribution . Download (1MB) |
Cite this document: | Djoumessi, E. E. & Wu, K. (2014). Tunable diplexer for cognitive radio RF front-end modules. Universal Journal of Electrical and Electronic Engineering, 2(7), p. 278-285. doi:10.13189/ujeee.2014.020703 |
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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.
Uncontrolled Keywords
Tunable Diplexer, Dual-Mode Filter, Tunable Transceiver, Varactor Diode, Cognitive Radio, SDR
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Subjects: |
2500 Génie électrique et électronique > 2500 Génie électrique et électronique 2500 Génie électrique et électronique > 2512 Radiodiffusion |
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Department: | Département de génie électrique |
Research Center: | POLY-GRAMES - Centre de recherche avancée en micro-ondes et en électronique spatiale |
Date Deposited: | 17 Mar 2021 10:58 |
Last Modified: | 08 Apr 2021 10:43 |
PolyPublie URL: | https://publications.polymtl.ca/4854/ |
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Journal Title: | Universal Journal of Electrical and Electronic Engineering (vol. 2, no. 7) |
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Publisher: | Horizon Research Publishing |
Official URL: | https://doi.org/10.13189/ujeee.2014.020703 |
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