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Liquid crystal-based multi-polarization reconfigurable patch antenna

A patch antenna, multiple technology, applied in the direction of antenna, antenna coupling, antenna grounding switch structure connection, etc., can solve the problems of high cost, large insertion loss, unsuitable high-gain low-cost antenna, etc., to avoid interference, increase The effect of bandwidth

Active Publication Date: 2022-01-04
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For traditional polarization reconfigurable antennas, the method of loading PIN diodes in the antenna system is adopted, and the change of on-off realizes the switching of antenna polarization. However, in the high-frequency band, diodes will cause large insertion loss and high cost. Disadvantages, not suitable for the design and manufacture of high-gain, low-cost antennas

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  • Liquid crystal-based multi-polarization reconfigurable patch antenna
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  • Liquid crystal-based multi-polarization reconfigurable patch antenna

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Embodiment Construction

[0020] The present invention provides a multi-polarization reconfigurable patch antenna based on liquid crystal, which mainly includes the pattern design of the first metal pattern layer 02, the second metal layer 04 and the patch antenna layer 06, module layout design and size design.

[0021] like figure 1 As shown, it is a functional module and a logical schematic diagram of the multi-polarization reconfigurable device of the present invention. The device can specifically include: a 3dB T-shaped power divider 022 , a phase shifter 023 and a phase shifter 2 024 , a 90° phase shifter 025 and a 90° phase shifter 2 026 , and a patch antenna 06 . The above modules constitute a liquid crystal reconfigurable power divider and polarization reconfigurable antenna unit, and use the power ratio changes output to 90° phase shifter 1 025 and 90° phase shifter 2 026 to control the patch antenna 06 Changes in the polarization state of radiated electromagnetic waves. based on figure 1 ...

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Abstract

The invention discloses a liquid crystal-based multi-polarization reconfigurable patch antenna. The antenna comprises an upper glass substrate (01), a first metal pattern layer (02), a liquid crystal layer (03), a second metal pattern layer (04), a lower glass substrate (05) and a patch antenna layer (06) distributed sequentially. According to the antenna of the invention, through the phase change between phase shift units, the amplitude ratio is changed, the polarization state of the radiation antenna is switched, the disadvantages of large insertion loss and high cost of an antenna unit due to the introduction of an active device in a traditional phase shift module are avoided, and the requirements of broadband and multiple polarization states of the unit antenna are met; the multi-layer composite structure design is adopted, direct current signals are prevented from interfering other modules; and a radiation layer and a transmission layer are separated, the bandwidth is increased, and interference is avoided.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal antennas, in particular to a multi-polarization reconfigurable patch antenna based on liquid crystals. Background technique [0002] The rapid development of the information age has brought about a rapid increase in information flow, and modern social life is inseparable from communication systems. The antenna plays an indispensable role as a conversion module between the transmitting system and free space. The transmitting end loads the information on the microwave, reaches the antenna system through the transmission network, and designs different structures to generate directional or scanning beams. [0003] Broadband, large-capacity, multi-functional, miniaturized, and highly integrated antennas are the development trend of wireless communication networks, and the reconfigurability of a single antenna system has also become a design direction for people. For traditional polarization re...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q5/28H01Q5/321H01Q3/26H01Q1/50H01Q1/52H01Q15/08
CPCH01Q1/38H01Q5/28H01Q5/321H01Q3/26H01Q1/50H01Q1/52H01Q15/08
Inventor 汪晟汪相如吴双红张文钊
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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