A Rotary Electret Mechanical Antenna Low Frequency Communication System
An electret and mechanical technology, applied in transmission systems, electrical components, etc., can solve problems such as poor survivability in wartime, difficult short-term repairs, and antennas occupying a large area, so as to save space and resources, strong anti-interference ability, The effect of small propagation loss
Active Publication Date: 2020-07-28
BEIHANG UNIV
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The size of the shore launch station is huge, the antenna covers a wide area, there are several to dozens of iron towers, and the antenna is exposed, the target is obvious, and the survivability in wartime is poor. It is very easy to be destroyed and difficult to repair in a short period of time.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0026] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The following description is for illustrative purposes, not for limitation. Various changes and modifications can be made within the scope of the embodiments described herein without departing from the spirit of the present invention. For the sake of clarity, not all features of the actual implementation are described in this specification.
[0027] Such as figure 1 As shown, the low-frequency communication system of a rotating electret mechanical antenna proposed by the present invention includes: a low-frequency magnetic field signal generating module and a magnetic induction signal receiving module, wherein the low-frequency magnetic field signal generating module drives the electrified stationary through a motor in the mechanical antenna ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a low-frequency communication system of a rotating electret mechanical antenna, belonging to the technical field of low-frequency communication. The system of the invention comprises a low-frequency magnetic field signal generating module and a magnetic induction signal receiving module. The low frequency magnetic field signal generation module comprises a motor and a charged electret in a mechanical antenna; the motor in the mechanical antenna is controlled to produce different rotational speed, electret is driven to rotate, magnetic field signals of different frequencies are produced. A desired communication signal is loaded onto the generated magnetic field signal, and the signal is transmitted to the receiving direction by a mechanical antenna. The magnetic induction signal receiving module receives the transmitted magnetic field signal through the magnetic field sensor, and demodulates and acquires the required communication signal. The invention utilizes the characteristics of ultra-low frequency and very-low frequency radio waves, adopts the method that a motor drives a charged electret to rotate, forms a low-frequency alternating magnetic field and transmits a magnetic field signal, can greatly reduce the antenna length and power consumption of a radio transmitter, and realizes stable low-frequency radio communication.
Description
Technical field [0001] The present invention relates to the technical field of low-frequency communication, in particular to a low-frequency communication system of a radio transmitter realized by a mechanical drive. Background technique [0002] Low-frequency communication technology is a technology that uses ultra / very low frequency bands in the radio frequency spectrum for wireless communication. Low frequency communication has many advantages compared with communication in other frequency bands, mainly in the following aspects: [0003] Ultra-low frequency signals use the huge "waveguide" between the earth's surface and the ionosphere to propagate, and the atmospheric attenuation is very small. For example, when working at 75Hz, the atmospheric attenuation is 0.9~1.5dB per thousand kilometers, which can make the low frequency signal transmit far away. Only one transmitter station can be used for global communication. At the same time, its attenuation in seawater is about 0.3d...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/40
CPCH04B1/40
Inventor 崔勇王琛宋晓袁海文刘颖异
Owner BEIHANG UNIV