Low Q electrically small linear and elliptical polarized spherical dipole antennas

By S. Best. IEEE Transactions on Antennas and Propagation, 2005

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A Folded-Monopole Model for Electrically Small NRI-TL Metamaterial Antennas (2008, background): “to find the maximum fractional bandwidth that an antenna with the above size could attain [9]”
Composite right/left-handed transmission line based compact resonant antennas for RF module integration (2006, background): “In addition, as shown in [10], [11] the monopole with circular disk loaded at the end or the helix dipole antenna with spiral arm can enhance the impedance bandwidth with compact size.”
Physical Bounds and Optimal Currents on Antennas (2012, background): “The considered current densities are similar to the current densities on folded spherical dipoles, capped spherical dipoles [11], and folded spherical helix [12] antennas.”
Metamaterial-based efficient electrically small antennas (2006, background): “There have been a wide variety of recent approaches to achieve this goal including clever packing of resonant antenna elements into this small volume using natural geometrical configurations [12]–[15], fractal curve antennas [20]–[23] and space-filling curve antennas [24]–[27].”