Multi-lobe cylindrical low-frequency mechanical antenna structure

Abstract

The invention relates to the technical field of low-frequency communication, and provides a multi-lobe cylindrical low-frequency mechanical antenna structure. The low-frequency antenna includes a support frame, a cylindrical antenna shell (support structure), and electret films with unlike charges. The electret films are attached to the cylindrical antenna shell (support structure) in a positive -negative alternating manner. When a mechanical antenna rotates, a ring current will be generated on the electret films, and the magnetic fields generated by different electret films will overlap witheach other. Compared with a structure in which positive and negative electret films are symmetrically distributed, the multi-lobe cylindrical low-frequency mechanical antenna structure provided by theinvention can help to improve the frequency of electromagnetic waves generated by mechanical antennas and reduce the requirements for the structural strength of the antenna shell and the rotating speed of the rotary motor. Moreover, the structure can help to reduce the power loss of mechanical antennas caused by rotation and friction.

Description

technical field [0001] The invention relates to the technical field of low-frequency communication, in particular to a structural design of a multi-lobe cylindrical low-frequency mechanical antenna. Background technique [0002] The mechanical antenna type low frequency / very low frequency transmitting antenna designed based on electret material often uses mechanical motion to accelerate the electret charge on the electret material to achieve efficient radiation of low frequency / very low frequency band electromagnetic waves. Under this design, the antenna structure is cylindrical, and the electret film with different charges is attached to the antenna support structure. The rotating motor drives the antenna to rotate to generate low-frequency / very low-frequency electromagnetic waves. [0003] At present, the charge distribution method of the common electret-type mechanical antenna is often to attach two electret films with different charges symmetrically on the antenna suppor...

AI Technical Summary

Problems solved by technology

[0005] The multi-lobe cylindrical low-frequency mechanical antenna structure provided by the present invention further solves the problem that the electromagnetic wave frequency generated by the mechanical antenna is limited by the rotational speed of the rotating motor and cannot meet the requirements on the basis of solving the problem of large volume of the existing low-frequency antenna. Frequency requirements in actual communication

[0006] In order to solve the problem that the frequency of electromagnetic waves generated by the mechanical antenna is low, the present invention adopts the following technical solutions:

Images