Broadband wide-axial-ratio beam circularly polarized microstrip antenna

A microstrip antenna and circular polarization technology, applied in the field of antennas, can solve the problems of increasing the effective radiation area and the antenna bandwidth cannot cover the four major satellite navigation systems, and achieve the effects of low cost, high precision and light weight

Active Publication Date: 2020-07-17
HARBIN ENG UNIV
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Problems solved by technology

The methods for expanding the bandwidth of microstrip antennas usually include adding parasitic elements, increasing the antenna profile, and using dielectric plates with high dielectric constants. Although these methods can achieve broadband characteristics, the antenna bandwidth cannot cover the four commonly used satellite navigation syste

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  • Broadband wide-axial-ratio beam circularly polarized microstrip antenna
  • Broadband wide-axial-ratio beam circularly polarized microstrip antenna
  • Broadband wide-axial-ratio beam circularly polarized microstrip antenna

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specific Embodiment

[0034] This embodiment provides a wide-bandwidth axial ratio beam circularly polarized microstrip antenna with a center frequency of 1.46 GHz, and its structure is as follows figure 1 , 2 As shown, mainly include:

[0035] Dielectric substrate 1, the substrate uses FR-4 with a dielectric constant of 4.4 and a thickness of 0.8 mm. The top layer of the dielectric substrate is printed with a ring-shaped parasitic element 6 and the bottom is printed with an octagonal parasitic element 7.

[0036] The dielectric substrate 3 uses FR-4 with a dielectric constant of 4.4 and a thickness of 0.8 mm. The top layer of the dielectric substrate is printed with an octagonal main patch 8 and a parasitic unit 9.

[0037] The dielectric substrate 5 uses Rogers 4350B with a dielectric constant of 3.66 and a thickness of 0.508 mm. The top layer of the dielectric substrate is printed with a reflective plate 10, and the bottom is printed with a feed point network 11. The coaxial probe 12 passes through the...

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Abstract

The invention provides a broadband wide-axis-ratio beam circularly polarized microstrip antenna. The antenna feeds a radiation patch through a broadband feed network to obtain broadband circular polarization characteristics. According to the antenna, the radiation patch is coupled with the parasitic unit and the metal column, and vertical current is introduced to the metal column so that the amplitude and the phase of a far-zone electric field component are changed, and a wide beam characteristic is obtained. The antenna bandwidth covers four common satellite navigation system working frequency points and can be applied to a multimode satellite navigation receiver.

Description

Technical field [0001] The invention relates to a wide-bandwidth axial ratio beam circularly polarized microstrip antenna, which belongs to the technical field of antennas. Background technique [0002] With the rapid development of major satellite navigation systems, navigation terminals not only need to be able to receive signals from major navigation systems, but also to capture satellite signals of a single satellite navigation system as much as possible. This requires antennas that can achieve broadband and wide beam performance. . Microstrip antennas have the advantages of small size, light weight, easy conformal, and easy to achieve circular polarization, so they have received extensive attention in the field of satellite navigation. The methods for expanding the bandwidth of microstrip antennas usually include additional parasitic elements, increasing the antenna profile, and using high dielectric constant dielectric plates. Although these methods can achieve broadband c...

Claims

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Application Information

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IPC IPC(8): H01Q1/50H01Q1/36H01Q1/38H01Q15/24H01Q19/00H01Q19/02H01Q19/10
CPCH01Q1/36H01Q1/38H01Q1/50H01Q15/24H01Q19/005H01Q19/02H01Q19/10
Inventor 黄平杨光王伟王敬郭猛佟禹辰
Owner HARBIN ENG UNIV
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