A Circularly Polarized Antenna Controlling Liquid Metal Based on Gravity Field

A technology of circularly polarized antenna and liquid metal, which is applied in the direction of antenna, antenna parts, antenna grounding switch structure connection, etc., to achieve the effects of popular processing, flexible design, and improved timeliness

Active Publication Date: 2021-04-27
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, circularly polarized antennas face various challenges in terms of broadband, miniaturization, and high gain.

Method used

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  • A Circularly Polarized Antenna Controlling Liquid Metal Based on Gravity Field
  • A Circularly Polarized Antenna Controlling Liquid Metal Based on Gravity Field
  • A Circularly Polarized Antenna Controlling Liquid Metal Based on Gravity Field

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0035] The design and principle of a circularly polarized antenna based on gravity field to control liquid metal, such as figure 1 As shown, a rectangular slit is terminated on the metal reflective surface of a rectangular printed board with a thickness of 1.6mm, a relative permittivity of 4.7, and a tangent loss angle of 0.022, as shown in Figure 4 As shown, feed it with 50Ω CPW, and load the metal main radiation patch on the surface of the dielectric substrate. The circularly polarized antenna can be flipped so that the liquid metal Hg in the glass cavity is on the left and right sides of the glass container. Two parts flow, resulting in two working states: such as Figure 8 As shown, rotate 90° counterclockwise along the x-axis (state 1), due to gravity, liquid metal Hg flows into the 4 parts of the glass cavity, as Image 6As shown, the main...

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Abstract

The invention relates to a coplanar waveguide circularly polarized antenna based on a gravity field to control liquid metal. The circularly polarized antenna is composed of four parts, namely a metal reflective surface, a metal radiation patch, a small metal sheet at the bottom, and a dielectric substrate in the middle. And the glass container containing liquid metal Hg, the metal patch contains the feed network and the main radiation patch, through the vertical rotation in the physical sense, the gravity field is used to control the liquid metal flow in the antenna, so as to connect different radiation branches, The change of the circular polarization radiation frequency band and the main polarization radiation direction of the antenna is realized. The circularly polarized antenna has good circularly polarized performance in the 3.9~4.6 GHz and 4.4~5.1 GHz bands. In addition, the antenna properly slots the metal ground reflection surface, which also greatly improves the circular polarization performance of the antenna. The invention is small in size, light in weight and has a relatively simple planar structure, and has the characteristics of easy manufacture, efficient work, various control means, good shielding performance, and excellent performance.

Description

technical field [0001] The invention relates to a circularly polarized antenna for regulating liquid metal based on a gravity field, and belongs to the technical field of liquid metal and reconfigurable microwave devices. Background technique [0002] With the rapid development of modern wireless technology and microwave circuits, antennas, as an indispensable component in various wireless communication-equipment, have been widely used and made important technological progress. In many radar systems, navigation systems, satellite systems, and remote control telemetry systems, circularly polarized antennas are a commonly used antenna form. Circularly polarized antennas are beneficial to the reception of space electromagnetic waves, and can also suppress the interference of rain and fog reflection clutter. It is of great practical significance to carry out research on low-cost, miniaturized, and low-profile circularly polarized antennas. In recent years, with the development...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/36H01Q1/38H01Q1/50H01Q3/24H01Q5/10H01Q5/20H01Q5/321H01Q15/24H01Q19/10
CPCH01Q1/364H01Q1/38H01Q1/50H01Q3/247H01Q15/24H01Q19/10H01Q5/10H01Q5/20H01Q5/321
Inventor 章海锋黄通刘国标曾立
Owner NANJING UNIV OF POSTS & TELECOMM
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