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An Amplitude-Phase Weighted Narrow-Side Waveguide Slot Array Antenna

A technology for array antennas and waveguide slots, applied to leaky waveguide antennas, antennas, antennas suitable for movable objects, etc., can solve the problems of not meeting the installation requirements of satellite platforms, increasing the weight of antennas, and difficult to control precision, etc., to achieve reduction Effects of structural complexity and transmission loss, compact structure, reduction of processing difficulty and manufacturing cost

Active Publication Date: 2011-12-28
XIAN INSTITUE OF SPACE RADIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the asymmetric and irregular beam shape in the pattern, it is necessary to design the amplitude modulation and phase modulation at the same time, and design the amplitude modulation network and the phase modulation network separately, such as Journal of Beijing University of Aeronautics and Astronautics, 2002.10, 28 (5): P574-577 Wang Jie, Lu Shanwei The article "Finite Element Method Design of Shaped Beam Slot Array Feed Network" introduces the amplitude modulation and phase modulation feed network, that is, the coupling slot is used to realize amplitude modulation, and the waveguide section of equal height but unequal width is added to realize phase modulation of the entire antenna array However, such a waveguide slot array antenna has a multi-layer structure, which is complex and bulky. When applied to Ku and higher frequency bands, it will lead to complex processing, difficult control of precision, and increased antenna weight. Cannot meet the satellite platform installation requirements

Method used

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  • An Amplitude-Phase Weighted Narrow-Side Waveguide Slot Array Antenna
  • An Amplitude-Phase Weighted Narrow-Side Waveguide Slot Array Antenna
  • An Amplitude-Phase Weighted Narrow-Side Waveguide Slot Array Antenna

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Embodiment 1

[0027] In this embodiment, a space-borne cosecant shaped narrow-side waveguide slot array antenna is preferred, with a cosecant shaped beam in the distance direction and a low sidelobe pencil beam in the azimuth direction; it works in the Ku frequency band, and the working bandwidth is 0.3% of the center frequency.

[0028] see figure 1 , the antenna consists of a radiation front 1 and an integrated amplitude-phase weighted feed network 2 . According to the actual needs of the antenna, the number of slots of a single radiation waveguide can be determined from the 3dB beam width in the azimuth direction, and the selection range is about 2 to 100, which is 68 in this embodiment; Determine the number of radiation waveguides and the spacing of the radiation waveguide array. The selection range of the number of radiation waveguides is about 6 to 14. In this embodiment, it is 10. The array spacing is based on the principle that no grating lobes appear in the pattern.

[0029] see ...

Embodiment 2

[0038] In this embodiment, a space-borne cosecant shaped narrow-side waveguide slot array antenna is preferred, with a cosecant shaped beam in the distance direction and a low sidelobe pencil beam in the azimuth direction; it works in the Ku frequency band, and the working bandwidth is 0.3% of the center frequency.

[0039] see Figure 7 , the antenna is composed of a radiation front 3 and an integrated amplitude-phase weighted feed network 4, which is realized by opening an inclined slot on the broadside of the waveguide to feed the broadside radiation waveguide. According to the actual needs of the antenna, the number of slots of a single radiation waveguide can be determined from the 3dB beam width in the azimuth direction, and the selection range is about 2 to 100, which is 54 in this embodiment; The number of radiation waveguides is determined, and the selection range is about 6 to 14, and it is 8 in this embodiment. The structures and connections of the various parts of...

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Abstract

The invention discloses an amplitude-phase weighed narrow waveguide slot array antenna, comprising a waveguide narrow radiating array surface (1) and an integrated amplitude-phase weighed shaping waveguide narrow feed network (2), wherein the range of the waveguide narrow radiating array surface (1) comprises 6-14 narrow slotting waveguides (11); the azimuth direction of the waveguide narrow radiating array surface (1) comprises 2-100 radiating slots (12); and the integrated amplitude-phase weighed shaping waveguide narrow feed network (2) comprises a feed transmission waveguide (23), amplitude-phase simultaneous weighing feed coupling slots (24) and an excessive connecting waveguide (26). For the radiating array surface of the antenna, slots which are inclined alternately are arranged at a waveguide narrow edge for in-phase radiation, and the feed network realizes different amplitude-phase allocations by slots which are inclined in the same direction at the waveguide narrow edge, thus reducing the structural complexity of the feed network and the transmission loss effectively and decreasing the processing difficulty and processing cost of the antenna system.

Description

technical field [0001] The invention belongs to the antenna technology in the field of wireless communication, in particular to a narrow-side waveguide slot array antenna with amplitude-phase weighting, high gain, and irregular beam-forming with an asymmetric pattern. Background technique [0002] With the rapid development of aerospace space exploration and satellite remote sensing, high-gain shaped beam antennas are widely used in surface information acquisition. [0003] Space-borne shaped antennas can be used as shaped reflector antennas or waveguide slot array antennas. Because shaped reflector antennas usually have a large envelope size, it is difficult to meet the installation requirements of small satellite platforms; while waveguide slot array antennas have a low profile characteristics, compact structure, easy beamforming, and high power capacity, etc., and the all-metal structure design fully considers the mechanics, heat, and radiation resistance of the antenna. ...

Claims

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Application Information

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IPC IPC(8): H01Q13/22H01Q21/00H01Q1/28
Inventor 朱培芸牛雪杰薛兆璇王锋斌汪洋
Owner XIAN INSTITUE OF SPACE RADIO TECH
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