Antenna bandwidth broadening with a negative impedance converter

Oluwabunmi O. Tade; Peter Gardner; Peter S. Hall

doi:10.1017/S1759078713000524

Antenna bandwidth broadening with a negative impedance converter

Oluwabunmi O. Tade, Peter Gardner, Peter S. Hall

Electronic, Electrical and Systems Engineering

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Cognitive radio (CR) has generated a lot of interest because of the promise of wide instantaneous bandwidths which will improve data rates. Current social trends suggest that CR nodes will ultimately be mobile and handheld. This produces a need for small wideband antennas. The Chu limit imposes a restriction on what is obtainable with passive matching. In this paper, it is shown how a negative impedance converter (NIC) can be used to broadband match a chassis antenna beyond what is obtainable with passive matching. It is also shown how to predict and overcome the instabilities which have limited the top frequency achievable with NICs. The noise and linearity performance of the NIC matched antenna is also shown.

Original language	English
Pages (from-to)	249-260
Journal	International Journal of Microwave and Wireless Technologies
Volume	5
Issue number	3
DOIs	https://doi.org/10.1017/S1759078713000524
Publication status	Published - Jun 2013

Keywords

Circuit design and applications
microwave measurements

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10.1017/S1759078713000524

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AU - Gardner, Peter

AU - Hall, Peter S.

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AB - Cognitive radio (CR) has generated a lot of interest because of the promise of wide instantaneous bandwidths which will improve data rates. Current social trends suggest that CR nodes will ultimately be mobile and handheld. This produces a need for small wideband antennas. The Chu limit imposes a restriction on what is obtainable with passive matching. In this paper, it is shown how a negative impedance converter (NIC) can be used to broadband match a chassis antenna beyond what is obtainable with passive matching. It is also shown how to predict and overcome the instabilities which have limited the top frequency achievable with NICs. The noise and linearity performance of the NIC matched antenna is also shown.

KW - Circuit design and applications

KW - microwave measurements

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JF - International Journal of Microwave and Wireless Technologies

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ER -

Antenna bandwidth broadening with a negative impedance converter

Abstract

Keywords

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