Reactively driven dipole antenna
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsJames Thomas Camp, Douglas Mark Wilson, Joseph Adam Gibson
Life of this patent
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Abstract
A capacitively or inductively driven spiral antenna creates an electric current distribution of a dipole, which generates a sensible magnetic field for various military applications including detecting and pre-detonating improvised explosive devices (IEDs). The antenna includes a dielectric substrate, a spiral antenna, driving elements such as tuning forks or loop, and a coaxial cable that connects to a source terminal. The substrate is a low dielectric loss insulating material to provide support for the antenna. The spiral antenna is tuned to a natural frequency is disposed on the substrate. The coaxial cable extends from the substrate to the source terminal.
Claims5
A reactively driven open loop antenna with dipole current distribution for generating a sensible magnetic field and in association with a source terminal, said antenna comprising:
- a dielectric substrate;
- a driving element connecting to the source terminal;
- a spiral antenna tuned to a natural frequency and disposed on said substrate;
- and
- a coaxial cable extending from said substrate to the source terminal, wherein
- said driving element connects to a capacitively driven pair of dipole electrodes, and
- said pair of dipole electrodes are disposed across and electrically isolated from said antenna, respectively connecting to the source terminal via said coaxial cable, and said dielectric substrate.
Dependencies are inferred from the claim text.