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All-dielectric integrated ultra-wideband low-profile polymorphic conformal phased array antenna

A phased array antenna and ultra-wideband technology, which is applied in antennas, resonant antennas, antenna arrays, etc., can solve problems such as the difficulty of wideband scanning arrays

Active Publication Date: 2021-04-23
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The disadvantage of the traditional continuous current surface antenna array is that its section height often requires a quarter of the wavelength of the center frequency (λ 0 / 4) Above, the main factor limiting its profile is the equivalent inductance from the ground, and in order to achieve unidirectional radiation and high gain, the ground is indispensable
Although capacitive coupling is introduced through the capacitance of the gap between adjacent array elements to offset the ground inductance, the profile can be reduced to a certain extent, but the profile height is lower than λ 0 / 4 wide-angle, broadband scanning array is still very difficult, such as the tightly coupled dipole array in the document "Dual-Polarized Tightly Coupled Array With SubstrateLoading" (IEEE Antennas and Wireless Propagation Letters), although ultra-wide bandwidth angular scanning has been achieved , but even ignoring the height of the feed balun below the ground, the profile of the antenna layer is approximately λ 0 / 2

Method used

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  • All-dielectric integrated ultra-wideband low-profile polymorphic conformal phased array antenna
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  • All-dielectric integrated ultra-wideband low-profile polymorphic conformal phased array antenna

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Embodiment 1

[0023] Embodiment 1: 8×8 planar array design

[0024] In this embodiment, the array element structure is as follows figure 1 , unit size is 12×12mm 2 , the working frequency is 6-12GHz, the antenna is a multi-layer structure, from top to bottom are wide-angle broadband matching layer (01), feeding balun layer (02), radiation patch layer (03), artificial magnetic surface layer ( 04), dielectric isolation layer (05), floor (06). The relative dielectric constants of the used dielectric substrates are: the first dielectric substrate: 3.0; the second to fifth dielectric substrates: 2.2. The thickness of the first dielectric substrate is 2.3mm; the thickness of the second dielectric substrate is 0.254mm; the thickness of the third dielectric substrate is 1mm; the thickness of the fourth dielectric substrate is 0.254mm; the thickness of the fifth dielectric substrate is 0.787mm.

[0025] Periodically arranged metamaterial units (011) are arranged on the wide-angle broadband matchi...

Embodiment 2

[0033] Example 2: 3×16 conformal array design

[0034] The front view of the conformal array in this embodiment is shown in figure 2 , the array unit is consistent with that in Embodiment 1. The E plane is the xoz plane, with the center of the array element as the reference, 16 sub-arrays are arranged on the arc surface with a radius of 250mm and an angle range of 44 degrees; the internal arrangement direction of the sub-arrays is the H plane, that is, the yoz plane, and each A subarray consists of three units.

[0035] The central unit of the conformal array scans from the side shot to 60 degrees of active standing wave on the E plane. Figure 5 , except that the 60-degree measured result is slightly higher than 2.5 in the narrow band, the simulation and measured results are all lower than 2.5 in the 60-degree scanning range in the band.

[0036] In summary, the present invention proposes a design method for a low-profile conformal antenna array. The all-dielectric integrat...

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Abstract

The invention belongs to the technical field of antenna engineering and wireless communication, and relates to an all-dielectric integrated ultra-wideband low-profile polymorphic conformal phased array antenna. The antenna is a planar array or a conformal array composed of array elements; each array element comprises a wide-angle broadband matching layer, a feed balun layer, a radiation antenna layer, an artificial magnetic surface layer, a dielectric isolation layer and a ground plate which are stacked from top to bottom. According to the all-dielectric integrated ultra-wideband low-profile polymorphic conformal phased array antenna of the invention, a vertical feed balun in a traditional continuous current surface antenna is replaced by a feed patch which is capacitively coupled in the horizontal direction above a dipole; the artificial metamaterial wide-angle broadband matching layer and the artificial magnetic surface are adopted, so that the wide-angle broadband scanning characteristic of the antenna is ensured, and the profile of the antenna is greatly reduced at the same time. The antenna is suitable for the fields of planar or cylindrical conformal wide-angle and broadband scanning phased-array antennas in high-speed communication systems.

Description

technical field [0001] The invention belongs to the technical field of antenna engineering and wireless communication, and relates to an all-dielectric integrated ultra-wideband low-profile multi-morphology conformal phased array antenna, which is suitable for planar or cylindrical coaxiality of wide-angle and wide-band scanning phased array antennas in high-speed communication systems. shape. Background technique [0002] Broadband phased array antennas are an important component of modern high-speed communication systems. For example, in an electronic countermeasure system, a wideband phased array antenna can replace multiple sets of narrowband antennas, which can greatly save weight, volume and cost. In recent years, phased array antennas integrating wide-angle broadband scanning and low-profile functions have become a research hotspot. Compared with planar antenna arrays, conformal antenna arrays have more advantages when assembled on aircraft, missiles, and high-speed v...

Claims

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Application Information

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IPC IPC(8): H01Q1/50H01Q1/38H01Q3/34H01Q9/28H01Q21/06
CPCH01Q1/50H01Q1/38H01Q9/285H01Q3/34H01Q21/06H01Q21/062
Inventor 屈世伟侯中友李鹏发于大群闫开杨仕文
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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