Implementation method of single-caliber multi-feed-source multi-beam feed source assembly

Abstract

The invention provides an implementation method of a single-caliber multi-feed-source multi-beam feed source assembly. The implementation method comprises the following steps: layering and subdividinga horn array, a polarizer array and a beam forming network layer; providing each wave beam forming network layer with interlayer connecting points in a gridding mode according to the wavelength of 2.5 times, connecting the positions allowed by space in a layer-penetrating mode, and adopting a thermal compensation gasket made of low-expansion alloy to enable the pressing force between all the layers of the network to be constant in the high-low-temperature environment; enabling screws to penetrate through the positioning pin holes, so that interlayer positioning of the beam forming network layer is realized; in the assembling process of the beam forming network layer, performing symmetric assembling with the sixth layer as the reference, and if the thickness is out of tolerance, symmetrically grinding the sixth layer with the positive thickness deviation till the thickness of the first set of three-layer networks meets the size precision requirement; and aligning the channel cavities of every two adjacent beam forming network layers, and sequentially and symmetrically assembling the channel cavities until the assembly is completed. According to the invention, the processing difficulty of the feed source assembly can be effectively reduced, the insertion loss of the feed source array is controlled at a lower level, and the antenna radiation efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of multi-beam antenna research, in particular to a method for realizing a single aperture multi-feed multi-beam feed component. Background technique [0002] With the rapid growth of the demand for satellite communication services, it is urgent to develop broadband wide-area high-throughput satellites and develop multi-beam antenna technology suitable for wide-area high-capacity requirements. At present, the antenna forms with high technical maturity are divided into three categories: [0003] Single-aperture single-feed multi-beam antenna technology: multi-beam coverage is achieved through a pair of reflectors. Due to the limited feed distance and aperture, the beam overlap level cannot be effectively improved. Gain performance when facing the demand for seamless coverage in large areas The request could not be met. [0004] Multi-aperture single-feed multi-beam antenna technology: use multi-aperture to r...

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Problems solved by technology

[0008] However, due to the large number of passive components in the BFN structure of the feed array beamforming network, the cascade is complex, and the structural envelope is small, it is difficult to realize it through traditional design, processing, and assembly methods.

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