A Figure-8-Like Planar Broadband Circularly Polarized Antenna
A circularly polarized antenna and a figure-of-eight technology, applied in the microwave field, can solve the problems of circularly polarized microstrip antenna impedance bandwidth, narrow axial ratio bandwidth, narrow beam width, etc., and achieve low production cost, convenient feeding, and superior performance Effect
Inactive Publication Date: 2018-02-13
远江信息技术有限公司
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However, since the impedance bandwidth and axial ratio bandwidth of circularly polarized microstrip antennas are usually narrow, and the beam width is narrow, in order to meet the needs of wireless data transmission for broadband antennas, various new antenna designs and structures have begun to appear.
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[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0028] like figure 1 , figure 2 , image 3 As shown, the structure of a kind of 8-shaped planar broadband circularly polarized antenna is as follows: the antenna is made on the dielectric substrate 1, and the radiation structure is composed of the top radiation unit and the bottom radiation unit, both of which are identical in structure and size, and the top radiation unit is set On the upper surface of the dielectric substrate 1 , the bottom radiating unit is arranged on the lower surface of the dielectric substrate 1 , and the top radi...
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The present invention proposes a kind of 8-shaped planar broadband circularly polarized antenna, which includes a dielectric substrate, a top radiation unit and a bottom radiation unit, the top radiation unit is arranged on the upper surface of the dielectric substrate, and the bottom radiation unit is arranged on the lower surface of the dielectric substrate. The size and structure of the top radiation unit and the bottom radiation unit are the same, the top radiation unit is composed of the top metal strip radiation unit and the top metal half-wave oscillator unit, and the bottom radiation unit is composed of the bottom metal strip radiation unit and the bottom metal half-wave oscillator unit. The wave oscillator units are connected and composed; the top radiation unit and the bottom radiation unit are anti-symmetrically placed in a figure-eight shape relative to the dielectric substrate. The structure of the invention is suitable for wide-band circularly polarized antenna, which makes the antenna structure symmetrical and simple, convenient for feeding, and can realize wide-bandwidth beam circularly polarized radiation, and the antenna of the invention is small in size and low in manufacturing cost.
Description
technical field [0001] The invention belongs to the field of microwave technology, and in particular relates to a figure-eight-like planar broadband circularly polarized antenna. Background technique [0002] Microstrip antennas have the characteristics of small size, light weight, and low cost, and are widely used in the field of wireless communication. Circularly polarized antennas have many advantages: they can receive linearly polarized incoming waves in various directions, and their circularly polarized radiation waves can also be received by any polarized antenna; they have rotation orthogonality, and polarized waves are incident on symmetrical targets and reflected The wave becomes anti-handed and so on. However, since the impedance bandwidth and axial ratio bandwidth of circularly polarized microstrip antennas are usually narrow, and the beam width is narrow, in order to meet the needs of wireless data transmission for broadband antennas, various new antenna designs...
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IPC IPC(8): H01Q1/38H01Q1/50
Inventor 金秀华张静黄晓东
Owner 远江信息技术有限公司