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A Circularly Polarized Antenna with Wide Beamwidth and Small Size

A circularly polarized antenna, small size technology, applied in the direction of antenna, antenna grounding device, radiating element structure, etc., can solve the problem of large antenna size, and achieve the effect of compact antenna size, wide radiation beam, and low cost

Active Publication Date: 2011-12-14
GUANGDONG BROADRADIO COMM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ka-Lam Lau, Hang Wong and Kwai-Man Luk, "A full-wavelength circularly polarized slot antenna" (published in IEEE Trans. Antennas Propagat., vol.54, no.1, pp.741-743, Feb. 2006) proposed to use orthogonal grooves to achieve an axial ratio bandwidth of more than 5% and a gain of 11dBi, but the antenna size is too large

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  • A Circularly Polarized Antenna with Wide Beamwidth and Small Size
  • A Circularly Polarized Antenna with Wide Beamwidth and Small Size
  • A Circularly Polarized Antenna with Wide Beamwidth and Small Size

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and in conjunction with specific implementation methods, simulation and physical measurement results.

[0037] Such as figure 1 , figure 2 As shown, a circularly polarized antenna with a wide beam width and small size is a combination of a metal patch antenna and a reflector, and the two are connected by a coaxial feeder line. The circularly polarized antenna includes a dielectric substrate and a covering There is a metal patch 1 on it, a ground reflection surface 4, and a coaxial line 6 connecting the metal patch and the reflection surface.

[0038] The thickness of the dielectric substrate is T SUB =1.57mm, the relative permittivity is 2.33.

[0039] The size of the square metal patch 1 is PxP=0.316λx0.316λ, and there is a pair of orthogonal grooves 2 on it. The width of the groove is G=0.02mm. The center is divided into four rectangular patches clockwise: the firs...

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Abstract

The invention discloses a circular polarized antenna with a wide wave beam width and a small size. The antenna comprises a square paster; two notch grooves of an open circuit of a terminal are arranged on the square paster, wherein the two notch grooves are mutually orthogonal; the paster is fixed on a square grounding reflecting surface by a coaxial line. And four short-circuit columns of the open circuit of the terminal are arranged on the reflecting surface, so that the size of the reflecting surface is reduced. According to the invention, a signal feeding technology is utilized to excite the two orthogonal notch grooves to work in a circular polarization mode. According to the invention, an impedance bandwidth reaches 19%, wherein a standing-wave ratio is less than 2; and a 3d axial ratio bandwidth reaches 3.8%. In an axial ratio bandwidth, a 3d B wave beam width reaches a value by adding 101.4 degrees with 1.4 degrees or subtracting the 1.4 degrees from the 101.4 degrees as well as a gain reaches a value by adding 5.76dBi with 0.18dBi or subtracting the 0.18dBi from the 5.76dBi. The circular polarized antenna has advantages of compact antenna dimension, light weight, low cost and easy manufacture. Especially, the circular polarized antenna has advantages of good impedance bandwidth, wide radiation wave beam, and high gain. Therefore, the circular polarized antenna can be widely applied to satellite communication and traffic navigation.

Description

technical field [0001] The invention relates to a circularly polarized antenna, in particular to a circularly polarized antenna with a wide beam width and small size. Background technique [0002] In recent years, radio communication technologies such as radar, global positioning system, and cellular communication have developed rapidly. The continuously growing demand for radio communication has led more and more researchers to devote themselves to the innovative development of radio communication systems. In a radio communication system, the antenna is a central element. Compared with linearly polarized antennas, circularly polarized antennas have the advantages of wider receiving and transmitting azimuth angles, better mobility, and better weather adaptability, so they are more widely used in radio communications. [0003] Satellite communication requires circularly polarized antennas to have a wide field of view, and some special equipment even requires circularly pola...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/48H01Q19/10
Inventor 吴壁群
Owner GUANGDONG BROADRADIO COMM TECH
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