A varactor-based tunable matching network for a non-resonant mobile terminal antenna

Research output: Chapter in book/report/conference proceedingConference contributionResearchpeer review

Authors

  • Yi Chen
  • Robert Martens
  • Risto Valkonen
  • Dirk Manteuffel

External Research Organisations

  • Kiel University
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Details

Original languageEnglish
Title of host publication8th European Conference on Antennas and Propagation, EuCAP 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1877-1881
Number of pages5
ISBN (electronic)9788890701849
Publication statusPublished - 2014
Externally publishedYes
Event8th European Conference on Antennas and Propagation, EuCAP 2014 - The Hague, Netherlands
Duration: 6 Apr 201411 Apr 2014

Publication series

Name8th European Conference on Antennas and Propagation, EuCAP 2014

Abstract

In this paper, we present a varactor-based tunable matching network for a mobile terminal antenna based on a non-resonant capacitive coupling element. The system is able to enhance the power transfer to the antenna in the commonly used mobile communication bands within the frequency range 0.69 ≤ f [GHz] ≤ 3.6. The impedance of a mobile terminal antenna is dependent on the operating frequency and on the effects of the user interaction (e.g. hand and head proximity). This mismatched impedance can be correctly tuned using the proposed tunable matching network. In almost all of the typical usage scenarios, the transducer gain with the threshold value GT = -1.25 dB can be achieved. The average value of the total efficiency of the fabricated mock-up-system in free space within the conventional bands is η = 68%. The good radiation performance with user interaction is also shown in this paper using the proposed matching network.

Keywords

    impedance matching network, non-resonant coupling element, total efficiency, transducer gain, user interaction

ASJC Scopus subject areas

Cite this

A varactor-based tunable matching network for a non-resonant mobile terminal antenna. / Chen, Yi; Martens, Robert; Valkonen, Risto et al.
8th European Conference on Antennas and Propagation, EuCAP 2014. Institute of Electrical and Electronics Engineers Inc., 2014. p. 1877-1881 6902163 (8th European Conference on Antennas and Propagation, EuCAP 2014).

Research output: Chapter in book/report/conference proceedingConference contributionResearchpeer review

Chen, Y, Martens, R, Valkonen, R & Manteuffel, D 2014, A varactor-based tunable matching network for a non-resonant mobile terminal antenna. in 8th European Conference on Antennas and Propagation, EuCAP 2014., 6902163, 8th European Conference on Antennas and Propagation, EuCAP 2014, Institute of Electrical and Electronics Engineers Inc., pp. 1877-1881, 8th European Conference on Antennas and Propagation, EuCAP 2014, The Hague, Netherlands, 6 Apr 2014. https://doi.org/10.1109/EuCAP.2014.6902163
Chen, Y., Martens, R., Valkonen, R., & Manteuffel, D. (2014). A varactor-based tunable matching network for a non-resonant mobile terminal antenna. In 8th European Conference on Antennas and Propagation, EuCAP 2014 (pp. 1877-1881). Article 6902163 (8th European Conference on Antennas and Propagation, EuCAP 2014). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/EuCAP.2014.6902163
Chen Y, Martens R, Valkonen R, Manteuffel D. A varactor-based tunable matching network for a non-resonant mobile terminal antenna. In 8th European Conference on Antennas and Propagation, EuCAP 2014. Institute of Electrical and Electronics Engineers Inc. 2014. p. 1877-1881. 6902163. (8th European Conference on Antennas and Propagation, EuCAP 2014). doi: 10.1109/EuCAP.2014.6902163
Chen, Yi ; Martens, Robert ; Valkonen, Risto et al. / A varactor-based tunable matching network for a non-resonant mobile terminal antenna. 8th European Conference on Antennas and Propagation, EuCAP 2014. Institute of Electrical and Electronics Engineers Inc., 2014. pp. 1877-1881 (8th European Conference on Antennas and Propagation, EuCAP 2014).
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abstract = "In this paper, we present a varactor-based tunable matching network for a mobile terminal antenna based on a non-resonant capacitive coupling element. The system is able to enhance the power transfer to the antenna in the commonly used mobile communication bands within the frequency range 0.69 ≤ f [GHz] ≤ 3.6. The impedance of a mobile terminal antenna is dependent on the operating frequency and on the effects of the user interaction (e.g. hand and head proximity). This mismatched impedance can be correctly tuned using the proposed tunable matching network. In almost all of the typical usage scenarios, the transducer gain with the threshold value GT = -1.25 dB can be achieved. The average value of the total efficiency of the fabricated mock-up-system in free space within the conventional bands is η = 68%. The good radiation performance with user interaction is also shown in this paper using the proposed matching network.",
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