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Physically small spiral antenna

Image Number 12 for United States Patent #7586462.

An improved dipole antenna having unbalanced radio frequency current in spiral radiating elements operating on a plurality of resonant frequencies providing a wide range of impedance matching to a device feeding radio frequency energy to said antenna. Said dipole antenna is also configured with parasitic spiral elements to provide increased operational performance. Each said spiral radiating element electrical parameter enabling said element to be operated alone. Said dipole antenna operates on any portion of the radio frequency spectrum.

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