Battlement type anti-multipath multiple feed source double frequency wide beam stable phase center antenna

Abstract

Provided is a battlement type anti-multipath multiple feed source double frequency wide beam stable phase center antenna. The battlement type anti-multipath multiple feed source double frequency wide beam stable phase center antenna comprises an antenna housing and battlement type three-dimensional metal choking coils, wherein the battlement type three-dimensional metal choking coils comprise a center substrate, a first choking coil, a second choking coil, a third choking coil and a fourth choking coil. The antenna housing is arranged on the center substrate, the center substrate is provided with a first powder divider and a second power divider, and a first radiating antenna and a second radiating antenna are arranged inside the antenna housing and the center substrate and fixed through hollow short circuit screws. A first coaxial-cable is arranged between the first radiating antenna and the center substrate, one end of an inner core is connected with radiating pieces of the first radiating antenna, and the other end of the inner core is connected with a first branch path of the first powder divider. One end of a shielding layer is in ground connection with the first radiating antenna, and the other end of the shielding layer is in ground connection with the first powder divider. A fifth coaxial-cable is arranged between the second radiating antenna and the center substrate and penetrates through the hollow short circuit screws. The inner core is respectively in ground connection with the second radiating antenna and a first branch path of the second powder divider. The shielding layer is respectively in ground connection with radiating pieces of the second radiating antenna and the second powder divider.

Description

technical field [0001] The invention relates to a battlemented anti-multipath multi-feed source dual-frequency wide beam 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 The S-band has 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. Background technique [0002] At present, the global satellite navigation system of the United States, the Beidou satellite navigation system of China, the GLONASS system of Russia and the Galileo navigation system under construction in Europe constitute the world's four major satellite navigation systems. These four systems can provide positioning with ordinary accuracy (usually at the level of 10 meters...

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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