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Dual-beam scanning array antenna based on reconfigurable Hadamard matrix

An array antenna and dual-beam technology, applied in the field of dual-beam scanning array antennas, can solve the problems of limiting the number of beams, scanning range and scanning efficiency of multi-beam array antennas, and achieve high scanning efficiency, low network complexity, and high number of beams Effect

Pending Publication Date: 2021-07-23
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This greatly limits the number of beams, scanning range and scanning efficiency of multi-beam array antennas

Method used

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  • Dual-beam scanning array antenna based on reconfigurable Hadamard matrix
  • Dual-beam scanning array antenna based on reconfigurable Hadamard matrix
  • Dual-beam scanning array antenna based on reconfigurable Hadamard matrix

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Embodiment Construction

[0050] In this embodiment, the overall structure of the dual-beam scanning array antenna based on the reconfigurable Hadamard matrix is ​​as follows: figure 1 As shown, it mainly includes a reconfigurable Hadamard matrix circuit and an array antenna. Wherein, the reconfigurable Hadamard matrix circuit is fabricated on the upper surface of the first dielectric substrate by using a microstrip process, and the array antenna is fabricated on the lower surface of the second dielectric substrate by using a microstrip process. In this embodiment, the "upper surface" and "lower surface" of the dielectric substrate are only used to distinguish the two surfaces of the dielectric substrate, and it does not mean that the "upper surface" must be upward or the "lower surface" must be upward when the dual-beam scanning array antenna of the present invention is working. "Must be down.

[0051] Specifically, the materials of the first dielectric substrate and the second dielectric substrate a...

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Abstract

The invention discloses a dual-beam scanning array antenna based on a reconfigurable Hadamard matrix, which comprises a reconfigurable Hadamard matrix circuit and an array antenna. The reconfigurable Hadamard matrix circuit comprises a plurality of in-phase and out-phase couplers and a plurality of switches enabling the in-phase and out-phase couplers to have different connection states. The array antenna comprises a plurality of antenna units, and the reconfigurable Hadamard matrix circuit receives a feed-in signal and sends an output signal of the reconfigurable Hadamard matrix circuit to the array antenna. According to the invention, the characteristics of the Hadamard matrix and the characteristic that the dual-beam scanning array antenna can realize dual-beam type switching scanning are utilized, dual-beam switching scanning is realized by switching excitation ports and changing the bias voltage, and size compression and topology simplification are realized. Compared with a multi-beam array antenna based on a traditional beam forming network, the dual-beam scanning array antenna has the advantage that higher beam quantity, higher scanning efficiency and larger scanning range can be realized with lower network complexity. The dual-beam scanning array antenna is applied to the technical field of wireless communication.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a dual-beam scanning array antenna based on a reconfigurable Hadamard matrix. Background technique [0002] Multi-beam array antennas can form high-gain beams in specific directions, thereby reducing multipath effects, and have the advantages of strong anti-interference ability, high transmission efficiency, and wide coverage. widely used in communication systems. A multi-beam array antenna is mainly composed of a beamforming network and an array antenna. Traditional beamforming networks such as Butler matrix, Nolan matrix, Bryce matrix, and Roman lens can provide antenna elements with signals of specific amplitude and phase difference, so that the array antenna can radiate in a specific direction. By switching the input port of the excitation beamforming network, the phase difference of the signal fed to the array antenna changes, thereby switching the direction...

Claims

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Application Information

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IPC IPC(8): H01Q3/24H01Q21/00H01Q23/00H01Q1/38
CPCH01Q3/24H01Q21/00H01Q23/00H01Q1/38Y02D30/70
Inventor 郑少勇温佳敏
Owner SUN YAT SEN UNIV
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