Quadruple Helix Antenna Based on Multiple Loading Structure

Abstract

The present invention discloses a four-armed helical antenna based on a multiple loading structure, comprising a laminated cavity 1, a parasitic ring 2, a "hat-shaped" parasitic structure 3, a double-layer feeding network 4, a reflection floor 5, and a helical antenna assembly 6 . The four-armed helical antenna is installed in the center of the platform 7 . The laminated cavity 1 is the outermost layer of the four-armed helical antenna. Inside the laminated cavity 1, a helical antenna assembly 6, a parasitic ring 2 and a "hat-shaped" parasitic structure 3 are arranged in sequence. Due to the coupling current generated on the surface of the parasitic ring 2 and the "hat-shaped" metal structure 3 of the present invention, part of the radiated energy is directed to the wide-angle direction, so that the low-elevation-angle gain near the horizontal plane of the antenna is increased. The laminated cavity 1 restrains the helical antenna assembly from exciting the coupling current on the surface of the platform 7, thus weakening the influence of the platform 7 on the wide beam radiation pattern of the quadrifilar helical antenna. Therefore, the antenna of the present invention can be used as a ground-end antenna in a satellite-to-ground communication system.

Description

technical field [0001] The invention belongs to the technical field of antennas, and further relates to a four-armed helical antenna based on a multiple loading structure among the helical antennas. The present invention can be used as a ground-end antenna in a satellite-to-ground communication system. Background technique [0002] The antenna is an important component in the satellite-to-ground communication system, which directly affects the performance of the entire system. Therefore, it is very important to study the antenna applied to the satellite-to-ground communication system. The ground-side antenna used for satellite-to-ground communication needs to realize communication with ground-side equipment and satellite-side equipment. When the ground-side antenna communicates with the ground-side equipment, it mainly relies on the low-elevation signal with vertical linear polarization close to the ground. Although the zenith signal is easy to receive and transmit, it has...

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Problems solved by technology

[0007] The purpose of the present invention is to address the deficiencies in the prior art above, and propose a quadrifilar helical antenna based on multiple loading structures, which solves the problem that the gain at low elevation angles cannot be reached when the existing quadrifilar helical antenna is used as a ground end antenna. The problem of communication requirements with ground equipment, and the problem that the wide-beam circularly polarized radiation pattern of the existing quadrifilar helical antenna is greatly affected by the large installation platform

The vertical part of the parasitic ring and the "hat-shaped" metal structure can be regarded as a radiation director, and the coupling current generated on its surface guides part of the radiation energy to the wide-angle direction, so that the radiation in the original wide-angle direction of the antenna The energy distribution is enhanced, and the gain at low elevation angles near the horizontal plane is increased, which solves the problem that when the existing quadrifilar helical antenna is used as a ground end antenna, the gain at low elevation angles cannot meet the communication requirements with ground equipment

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