A High Gain Quadrifilar Helical Antenna

Abstract

The invention relates to the technical field of antennas, in particular to a high-gain four-arm helical antenna. The high-gain four-arm helical antenna comprises a circuit board, wherein four installation pillars are installed at the edge of the bottom surface of the circuit board respectively; a dielectric cylinder is installed on the upper surface of the circuit board; the outer side wall of thedielectric cylinder is coated with a flexible printed film; and a first antenna arm, a second antenna arm, a third antenna arm and a fourth antenna arm are installed in four directions of the outer side wall of the flexible printed film in an embedded manner respectively. According to the high-gain four-arm helical antenna, a bottom column inserted groove is formed in the middle part of the uppersurface of the circuit board, a bottom column is fixedly installed on the bottom surface of the dielectric cylinder, two clamping devices are installed on the left and right sides of the outer side wall of the bottom column, each clamping device is formed by an accommodating tank, a second spring and a wedge block together, the bottom column is inserted into the interior of the bottom column inserted groove, and the bottom column is clamped and fixed by using the clamping devices, so that rapid disassembly and assembly for the dielectric cylinder and the circuit board is realized, and the installation time is saved.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a high-gain quadrifilar helical antenna. Background technique [0002] As an important part of the satellite navigation system, the antenna has a great influence on the overall performance of the navigation system. At present, there are two kinds of antennas widely used in the field of satellite navigation, microstrip antenna and four-arm helical antenna. In terms of electrical performance, the four-arm helical antenna has a heart-shaped pattern, good front and rear, and excellent wide-angle circular polarization characteristics. It is very suitable for application in the field of satellite communication and navigation. The development direction of the four-arm helical antenna is the same as other modern antennas. It is also developing towards miniaturization, multi-band and wide-band applications. [0003] The installation of the existing four-arm helical antenna is relatively...

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Problems solved by technology

[0003] The installation of the existing four-arm helical antenna is relatively complicated, all of which are fixed by welding, which is not convenient for later disassembly and maintenance. At the same time, it is necessary to find the welding position during welding, which is time-consuming and cannot be quickly positioned and installed. Therefore, we propose a high-gain quadrifilar helical antenna

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