Synchronously tuned patch for transmitting FSK
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The gain-bandwidth product of a conventional antenna is limited by its electrical size. Synchronous antenna tuning circumvents the limited bandwidth of a time-invariant resonant antenna by modifying the impedance match of the antenna in synchrony with the communications signal. This paper extends an investigation of tuning a VLF antenna in synchrony with a frequency shift keyed (FSK) signal to higher frequencies using varactor diodes rather than mechanical tuning.
[1] I. Bahl,et al. Frequency agile microstrip antennas , 1982 .
[2] Prakash Bhartia,et al. A frequency agile microstrip antenna , 1982 .
[3] H. Wolff,et al. High-Speed Frequency-Shift Keying of LF and VLF Radio Circuits , 1957 .
[4] Mohsen Salehi,et al. A Wideband Frequency-Shift Keying Modulation Technique Using Transient State of a Small Antenna (Invited Paper) , 2013 .