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Broadband and wide-angle dual-circular polarization spaceborne antenna

A dual circular polarization, satellite-borne antenna technology, applied in the antenna, antenna grounding switch structure connection, electrical components, etc., can solve the problem of unstable antenna performance, achieve good phase consistency, high processing accuracy, reduce processing and The effect of the difficulty of making

Inactive Publication Date: 2018-06-05
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When circular polarization is realized, traditional linearly polarized Vivaldi antennas are placed vertically and crossed, which will face the influence of unstable antenna performance caused by field coupling between slots

Method used

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  • Broadband and wide-angle dual-circular polarization spaceborne antenna
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  • Broadband and wide-angle dual-circular polarization spaceborne antenna

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Embodiment

[0019] combine figure 1 The structure of the wide bandwidth angle double circular polarization spaceborne antenna of the present invention designs a wide bandwidth angle double circular polarization spaceborne antenna: the frequency band range is 2.0-6.0GHz; the VSWR in this frequency band is less than 2, the axis The axial gain is greater than 4.5dB, and the axial ratio is less than 3 dB. The thickness of the microstrip antenna is 0.5mm, the dielectric constant is 2.65, and the size of the antenna is 140mm×140mm×142mm.

[0020] figure 2 It is the result graph of the voltage standing wave ratio of the two ports of the dual circularly polarized space-borne antenna with wide bandwidth and angle of the present invention. The working frequency range of the antenna is 2-6GHz, and the voltage standing wave ratio is less than 1.4, which meets the design index.

[0021] image 3 It is the axial gain result diagram of the two ports of the wide bandwidth angle dual circularly polar...

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Abstract

The invention discloses a broadband and wide-angle dual-circular polarization spaceborne antenna. The antenna is composed of two linear polarization double-slot Vivaldi antennas which are arranged ina crossed manner; two conventional Vivaldi antennas arranged side by side are combined together so as to form the linear polarization double-slot Vivaldi antenna; conductors of the antenna which are located at the center positions of the double-slot antennas partially intersect with each other; two sides of a dielectric plate are printed with metal plates, so that one Vivaldi antenna can be formed; an exponentially-graded metal patch is adopted as a radiating unit of the Vivaldi antenna; uniformly-spaced rectangular grids are designed at the side wings of the exponentially-graded metal patch;the direct-through port and coupling port of a 3dB directional coupler are respectively connected with the terminal open-circuited microstrips of the two double-slot Vivaldi antennas which are arranged in a crossed manner through microstrip power dividers; and the phase difference of two paths of signals is 90 degrees, so that circular polarization can be achieved. The antenna of the present invention can achieve a broadband and wide-angle dual-circular polarization characteristic and has the advantages of small size and light weight; the antenna can be produced in a batched manner with a printed circuit technology; and the antenna can be integrated with an active device and a circuit, so that a single module can be formed.

Description

technical field [0001] The invention relates to the technical field of microstrip antennas, in particular to a dual-circularly polarized satellite-borne antenna with wide bandwidth and angle. Background technique [0002] In military and civilian aspects of modern communications, there is an increasing demand for compact, intelligent, and multifunctional antennas, and broadband antennas are receiving more and more research in this field. Unlike narrowband antennas, UWB antennas have a wide octave bandwidth, and their performance is relatively stable within the impedance bandwidth. Therefore, a research hotspot of UWB communication is how to design a UWB antenna with high performance and smaller size. [0003] In order to ensure the quality of communication more effectively, in wireless communication systems such as satellite positioning and navigation, the antenna is required to have a wide radiation beam and have a large enough gain at low elevation angles to effectively c...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/50H01Q13/08
CPCH01Q13/085H01Q1/38H01Q1/50
Inventor 陈如山马佳葳孟畅刘璞玉樊振宏丁大志
Owner NANJING UNIV OF SCI & TECH
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