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Satellite-borne four slot feeding four-arm helical antenna

A four-armed helix and helical antenna technology, which is applied to the antenna support/installation device, the structural connection of the antenna grounding switch, the structural form of the radiating element, etc. Anti-interference ability, simple structure effect

Active Publication Date: 2018-04-27
SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The four arms of the antenna need to control the pattern and phase difference at the same time, which is very difficult to debug

Method used

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  • Satellite-borne four slot feeding four-arm helical antenna
  • Satellite-borne four slot feeding four-arm helical antenna

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Embodiment Construction

[0028] A space-borne four-slot-fed quadrifilar helical antenna proposed by the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and use imprecise ratios, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0029] see figure 1 as well as figure 2 , a quadrifilar helical antenna fed by space-borne four slots, including four helical antennas 2, a balun 1 electrically connected to the four helical antennas 2, a metal base 4 for supporting the balun 1; the balun 1 It includes an outer conductor 15 with a hollow structure, and an inner conductor 10 placed coaxially inside the outer conductor 15; the top of the outer conductor 15 has four slots along th...

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Abstract

The invention discloses a satellite-borne four slot feeding four-arm helical antenna comprising four helical antennas, a Balun electrically connected with the four helical antennas and a metal bottomboard used for supporting the Balun, wherein the Balun comprises an external conductor of a hollow structure, and an inner conductor coaxially arranged in the outer conductor; four slots are formed inthe top of the external conductor along axis directions, used for achieving equal electric field amplitude on the four helical antennas, and phases which sequentially differ by 90 DEG from one another, the external conductor is divided into four external conductor units by the four slots, and the internal conductor is electrically connected with the first external conductor unit in the four external conductor units; a data receiving port is arranged at the bottom of the external conductor, the metal bottom board is provided with a through hole, the position of the through hole is corresponding to the data receiving port, and the through hole is used for holding a data receiving device. The four arms of the four-arm helical antenna only forms an antenna pattern, without performing phase control; the Balun generates the phase difference needed by the four arms of the antenna, and the design difficulty of the four-arm helical antenna is reduced.

Description

technical field [0001] The invention belongs to the design field of low-orbit satellite space-borne antennas, in particular to a space-borne four-arm helical antenna fed by four slots. Background technique [0002] Low-orbit satellites usually use wide-beam circularly polarized antennas as their receiving antennas to ensure that they receive signals from as many satellites as possible. Due to the wide circularly polarized radiation beam of the four-armed helical antenna, it can maintain a high gain at a low elevation angle. By adjusting its physical size, different radiation patterns can be easily obtained, and it has beam width and structure. It is compact, small in size, light in weight, and does not need a reference ground. It has been widely used in GPS, Beidou and other satellite navigation systems. [0003] Kilgus proposed a quadrifilar helical antenna in the 1960s and 1970s. This antenna is a resonant radiation structure composed of four helical wires with equal feed...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/50H01Q1/12
CPCH01Q1/12H01Q1/36H01Q1/50
Inventor 汤小蓉习稳庆韩伟强苏永胜刘建锋顾朝武任红宇
Owner SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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