Omni-Azimuthal Pattern Generator for VLF and LF Communication
Patent application, Filed 18 Feb 2005
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
It is a general purpose and object of the present invention to generate an antenna pattern that does not change as a function of azimuth angle, but has equally good reception from all azimuth angles. It is an additional purpose to generate such an omni-azimuthal antenna pattern over a broad range of frequencies in a manner that does not require manual retuning or adjustment. These objects are accomplished through the introduction of a relative phase shift in a pair of identical orthogonally mounted loop antennas whereby operational-amplifier circuits in a network within the antenna system are all single pole circuits, with the pole frequency of the single pole circuits being adjustable by means of a potentiometer.
- Electrical and Electronic Equipment
- Direction Finding
- Radiofrequency Wave Propagation