An ultra-small ulf/vlf rotating current antenna and signal amplitude-frequency modulation method

An ultra-small, high-current technology, applied to antennas, loop antennas, circuits, etc., can solve problems such as non-radiation, unfavorable maintenance, and easy destruction, and achieve the effect of small electric size
CN108736146BActive Publication Date: 2020-07-31SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHEAST UNIV
Publication Date
2020-07-31

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Abstract

The invention discloses an ultra-small ULF / VLF rotating current antenna, comprising a light-emitting device and a turntable, wherein the turntable comprises a positive metal layer, a P-type semiconductor layer, an N-type semiconductor layer and a negative metal layer, which are arranged in sequence; the positive metal layer is provided with a light hole, the turntable is further provided with a conductive coil, and two ends of the conductive coil are respectively connected with the positive metal layer and the negative metal layer. The antenna designed by the invention has a very small electrical size, and may be realized in the ULF / VLF frequency band by the meter-scale volume, which is far smaller than the kilometer-scale antenna in the prior art and does not affect the radiation efficiency of the antenna.
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Description

technical field

[0001] The invention relates to an ultra-small ULF / VLF rotating current antenna and a signal amplitude-frequency modulation method. Background technique

[0002] The low-frequency electromagnetic spectrum has very important military application value. The most important advantage of ultra low frequency (Ultra Low Frequency-ULF, frequency range 300Hz ~ 3kHz) signal is that it can penetrate conductive media such as water, soil, rock and building materials, and is suitable for long-distance and underwater military communications. Very low frequency (VLF, frequency range 3-30kHz) is also suitable for military communications, forming an electromagnetic waveguide in the VLF frequency band between the ground and the ionosphere 70-85 kilometers above the earth's surface. In this earth- The attenuation of the VLF electromagnetic wave signal propagating in the ionospheric waveguide is very small, and it can propagate a long distance to realize beyond-the-horizon commu...

Claims

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