Low-profile low-elevation high-gain electromagnetic dipole antenna for satellite communication

An electromagnetic dipole and electric dipole technology, applied in the field of satellite mobile communication, can solve the problems of narrow beam width, inapplicability to satellite mobile communication, and high profile

Active Publication Date: 2021-07-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the simulation and test results, the profile height of the antenna is 0.05λ 0 , with a half-power beamwidth of 75°; this antenna has three wider frequency bands and a lower profile, but the beamwidth is narrower and cannot be used for satellite mobile communications
[0006] There are other circularly polarized satellite mobile antennas in the prior art, but they all have the problem of too high profile or narrow beam width

Method used

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  • Low-profile low-elevation high-gain electromagnetic dipole antenna for satellite communication
  • Low-profile low-elevation high-gain electromagnetic dipole antenna for satellite communication
  • Low-profile low-elevation high-gain electromagnetic dipole antenna for satellite communication

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Embodiment 1

[0046] In this embodiment, in the circularly polarized electromagnetic dipole antenna for satellite communication, the antenna is a cube with a total size of 84.5mm×84.5mm and an overall height of 11.8mm, between the upper and lower dielectric substrates The height of the air layer is h=7mm, and the parasitic patch adopts a triangular patch. The thickness h of the upper dielectric substrate 1 =0.8mm, FR4 with a dielectric constant of 4.6 and a loss tangent of 0.02 can be selected. The missing corner of the dielectric substrate is only for process saving, and there is no functional limitation; the thickness of the lower dielectric substrate is h 2 = 2mm, FR4 with a dielectric constant of 4.6 and a loss tangent of 0.02 can be selected; the AMC reflective surface is composed of four periodically arranged reflective units, the unit size is 41mm×41mm, and the distance between adjacent units is w sl = 3mm, the parameters of the rectangular groove provided on the reflective surface ...

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Abstract

The invention provides a low-profile low-elevation high-gain circularly polarized electromagnetic dipole antenna for satellite communication, and belongs to the field of satellite mobile communication. According to the antenna, the electric dipole radiation arms are designed into specific fan shapes, so that the impedance bandwidth of the antenna is effectively expanded; the beam width of the antenna is expanded through the parasitic magnetic dipole, and the gain at the low elevation angle is increased; meanwhile, a novel AMC structure (an artificial magnetic conductor reflecting surface) is adopted and is suitable for an electromagnetic dipole antenna, the AMC structure is compact, the design is simple, and the profile height of the antenna can be effectively reduced; and an air layer is introduced between the dielectric substrate and the AMC, so that the impedance bandwidth of the antenna is widened, and the gain of the antenna is increased. Therefore, the overall size of the antenna is 0.48[lambda]0*0.48[lambda]0*0.054[lambda]0([lambda]0 is the working wavelength at the center frequency point of the antenna), and the antenna has the characteristics of miniaturization and low profile.

Description

technical field [0001] The invention belongs to the technical field of satellite mobile communication, and in particular relates to a low-profile, low-elevation-angle, high-gain circularly polarized electromagnetic dipole antenna for satellite communication. Background technique [0002] Compared with linearly polarized waves, circularly polarized waves have strong anti-interference ability and low polarization mismatch loss, so they are often used in various satellite mobile communications. At the same time, modern communication scenarios are very complex. To work normally in different scenarios, the satellite mobile communication system needs to install multiple antennas inside. The installation space of a single antenna is small, so the system puts forward higher requirements for the antenna profile. In addition, in order to ensure that the satellite communication system has sufficient communication links, the antenna is required to have a wide enough beam width and a hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/50H01Q1/48H01Q9/06H01Q15/14
CPCH01Q1/38H01Q1/50H01Q1/48H01Q9/065H01Q15/14
Inventor 陈波陈梦龙谢琪胡皓全雷世文田径杨伟唐璞何子远
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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