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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2013-11-20
A Wideband Frequency-Shift Keying Modulation Technique Using Transient State of a Small Antenna (Invited Paper)
By
Mohsen Salehi,

    Dr. Mohsen Salehi

    Bradley Department of Electrical and Computer Engineering

    Virginia Polytechnic Institute and State University

    USA

    Homepage

Majid Manteghi,

    Dr. Majid Manteghi

    Bradley Department of Electrical and Computer Engineering

    Virginia Polytechnic Institute and State University

    USA

    Homepage

Seong-Youp Suh,

    Dr. Seong-Youp Suh

    Intel Labs

    Intel Corporation

    USA

    Homepage

Soji Sajuyigbe,

    Dr. Soji Sajuyigbe

    Intel Labs

    Intel Corp.

    USA

    Homepage

Harry G. Skinner

    Dr. Harry G. Skinner

    Intel Labs

    Intel Corp.

    USA

    Homepage

Progress In Electromagnetics Research, Vol. 143, 421-445, 2013
doi:10.2528/PIER13102204 | Google Scholar

Abstract
The rate of wireless data transmission is limited by the antenna bandwidth. We present an efficient technique to realize a high-rate direct binary FSK modulation by using the transient properties of high-Q antennas. We show that if the natural resonance of a narrowband resonant-type antenna is switched at a high rate, the radiating signal follows the variation of resonant frequency and provides a high-rate data-transmission regardless of the narrowband characteristics of the antenna. The bit-rate in this method is dictated by the switching speed rather than the impedance bandwidth. Since the proposed technique employs the antenna in a time-varying arrangement, carrier frequencies are not required to be simultaneously within the antenna bandwidth. When demanded, the antenna is tuned to required carrier frequency according to a sequence of digital data. Moreover, if the switching frequency is properly chosen such that the stored energy in the near-zone is not dramatically disturbed, any variation in the antenna resonance will instantaneously appear in the far-field radiation due to the previously accumulated energy in the near field. Therefore, depending on the Q factor and switching speed, radiation bandwidth of the antenna can be improved independently from the impedance bandwidth. Furthermore, we show that a single RF source is sufficient to excite both carrier frequencies and the need for a VCO is obviated. Experimental results are presented to validate the feasibility of the proposed technique.
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Citation
Mohsen Salehi, Majid Manteghi, Seong-Youp Suh, Soji Sajuyigbe, and Harry G. Skinner, "A Wideband Frequency-Shift Keying Modulation Technique Using Transient State of a Small Antenna (Invited Paper)," PIER, Vol. 143, 421-445, 2013.
doi:10.2528/PIER13102204
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