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A kind of small antenna for medium and short band ships

A small antenna, short-wavelength technology, applied in the field of miniaturized dipole antennas, can solve the problems of omnidirectional reception and radiation of unfavorable signals, and achieve the effects of low loss, easy matching, and increased radiation resistance

Inactive Publication Date: 2011-12-07
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the antenna designed in this document can work in the medium and short bands, and has the characteristics of broadband, but the antenna has strong directivity, which is not conducive to the omnidirectional reception and radiation of signals on ships.

Method used

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  • A kind of small antenna for medium and short band ships
  • A kind of small antenna for medium and short band ships
  • A kind of small antenna for medium and short band ships

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Embodiment Construction

[0031] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0032] The present invention mainly provides a new miniaturization implementation scheme of a dipole antenna. The Hilbert fractal antenna is used to replace the monopole antenna forming the dipole antenna. Under the premise that the resonance characteristics of the antenna remain unchanged, the antenna is effectively increased. The purpose of increasing the input impedance and improving the radiation efficiency of the antenna. At the same time, because the current distribution of the Hilbert fractal antenna is uniform, it is an omnidirectional antenna. Therefore, applying it to the design of a dipole antenna can improve the original radiation characteristics of the antenna, reduce the directivity of the antenna, eliminate the zero point of the antenna reception, and enable the antenna to achieve omnidirectional reception.

[0033] The present invention applies th...

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Abstract

The invention discloses a small-sized antenna for medium and short wave band ships. It consists of four components: a dielectric layer, a wire layer, a coaxial feeder, and a grounding plate; the wire layer is a planar structure, engraved on the upper surface of the dielectric layer, and consists of a number of curved wire segments connected end to end. Based on two six-order Hilbert fractal structures, the ends of the wires are connected by a short wire; the antenna is installed vertically on the upper surface of the ground plate, and a hole is opened at the geometric center of the ground plate, and the coaxial feeder is connected to the antenna through the hole of the ground plate. Experimental data show that the antenna prototype can work in the medium and short bands of 2-8MHz, and has the characteristics of small size, wide frequency band, low profile, omnidirectional, and suitable for ships. The invention can not only be used in the marine radio navigation system, but can also be extended to other related systems.

Description

technical field [0001] The invention relates to an antenna. Specifically, a miniaturized dipole antenna. Background technique [0002] The maritime radio navigation system is based on the spread spectrum system, equipped on ships, working in the short and medium bands, and using ground waves for ranging and positioning. As an effective supplement to the satellite-based radio navigation system, the system has high positioning accuracy, strong anti-interference ability, With the characteristics of large working range, good confidentiality, safety and reliability, the market prospect is very broad. [0003] In the maritime radio navigation system, the antenna, as an important component of the system, determines the integration degree, positioning accuracy and working range of the system, and is the basis for ensuring the safe and stable operation of the system. At present, the receiving equipment of the maritime radio navigation system is generally dominated by large-scale wh...

Claims

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Application Information

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IPC IPC(8): H01Q1/34H01Q1/38H01Q1/48
Inventor 刘洋赵琳焦健孙丽丽
Owner HARBIN ENG UNIV
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