Multi-feed-source double-frequency high-separation wide-beam high-stability phase centre antennae

Abstract

The invention relates to a multi-feed-source double-frequency high-separation wide-beam high-stability phase centre antennae. The multi-feed-source double-frequency high-separation wide-beam high-stability phase centre antennae comprises an antenna cap and a metal inverted frustum substrate, wherein the metal inverted frustum substrate is internally provided with a first power divider and a second power divider, first and second radiating antennas are arranged in the antenna cap and on the metal inverted frustum substrate and are fixed through hollow short circuit screws, and a first coaxial cable is arranged between the first radiating antenna and the metal inverted frustum substrate; one end of an inner core is connected with a radiation fin of the first radiating antenna, the other end of the inner core is connected with a first branch of the first power divider, one end of a shielding layer is connected with ground of the first radiating antenna, and the other end of the shielding layer is connected with the ground of the first power divider; a fifth coaxial cable is arranged between the second radiating antenna and the metal inverted frustum substrate and the fifth coaxial cable passes through the hollow short circuit screws, and the inner core of the fifth coaxial cable is respectively connected with the ground of the second radiating antenna and the first branch of the second power divider; and the shielding layer is respectively connected with the radiation fin of the second radiating antenna and the ground of the second power divider.

Description

[0001] Multi-feed dual frequency high isolation wide beam high stable phase center antenna. technical field [0002] The invention relates to a multi-feed dual-frequency high-isolation wide-beam high-stable phase center antenna suitable for geodetic satellite navigation ground receiving terminals and high-precision positioning and directional satellite navigation ground receiving terminals. The typical working frequency bands are L and S Frequency band, with significant advantages such as compact structure, small standing wave, small axial ratio, wide axial ratio bandwidth, high dual-frequency isolation, and ultra-stable phase center within a wide beam range. Mainly used in the US global satellite navigation system, China's Beidou, Russia's GLONASS and European Galileo satellite navigation and positioning systems, geodetic satellite navigation ground receiving terminals with millimeter-level positioning accuracy, short baselines and hundredth-level high precision In various hi...

AI Technical Summary

Problems solved by technology

The former maintains the axial symmetry of the antenna through the axisymmetric feed design. The more feeds, the better the symmetry and the higher the phase center stability. When the feed network is more complex and the bandwidth is narrower, the phase center stability is higher. Low, and not easy to adjust; the latter ensures a high and stable phase center of the antenna through a number of symmetrical slot spiral arms around the axis, and the feed network uses a serial traveling wave microstrip line feed circuit, the structure is relatively simple, but its phase center stability low and difficult to adjust

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