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A Low Profile Lens Antenna Based on Reflectarray Feed

A lens antenna and reflectarray technology, which is applied in the field of radar technology and wireless communication, can solve problems such as the inability to realize dual polarization or circular polarization, limit the application range of folded reflectarrays, increase processing and production costs, and achieve multiple degrees of design freedom , short preparation cycle and light weight

Active Publication Date: 2019-04-05
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the polarized grid can only pass through electromagnetic waves whose polarization direction is parallel to it, dual polarization or circular polarization cannot be achieved, which limits the application range of the folded reflectarray.
A.Abbaspour-Tamijani et al. disclose a lens antenna based on phased array feeding (A.Abbaspour-Tamijani, L.Zhang, G.Pan, H.K.Pan, and H.Alavi, "Lens-enhanced phased array antenna system for highdirectivity beam-steering,” in Proc.IEEE Int.Symp.on Antennas and Propagation (APSURSI), Jul.2011, pp.3275–3278), but the use of phased array feed will increase the Loss and increased processing and production costs

Method used

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  • A Low Profile Lens Antenna Based on Reflectarray Feed
  • A Low Profile Lens Antenna Based on Reflectarray Feed
  • A Low Profile Lens Antenna Based on Reflectarray Feed

Examples

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Effect test

Embodiment 1

[0024] In this example, a ring-focus Cassegrain reflector is used to feed the lens, and the overall structure is as follows figure 2 As shown, it includes a ring-focus feed 1 supported by a dielectric block 11 , a flat plate reflection array 2 at the bottom of the ring-focus feed 1 printed with a microstrip patch unit 20 , and a lens 3 above the ring-focus feed 1 . The specific structure diagram of the ring focus feed and reflector is shown in the following figure. image 3 As shown, the ring focus feed is composed of a C120 standard circular waveguide 10 with a radius of 8.737mm, a dielectric block 11 embedded in the standard circular waveguide, and a metal sub-reflection surface 12 smeared on the top of the dielectric block 11. The dielectric block 11 adopts the dielectric constant The 2.2 PTFE material is used for impedance matching and supporting the metal sub-reflection surface 12 . The flat reflection array 2 is composed of 92 rectangular patch structural units 20 with...

Embodiment 2

[0027] The lens antenna based on reflection array feeding in this example uses a common feed horn to feed the reflection array. The overall structure is as follows Figure 5 As shown, the primary horn adopts a conical horn 1, which is supported by four support rods 13, the reflection array and the lens adopt a rectangular aperture, and other structures are the same as those described in detail in Embodiment 1.

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Abstract

The invention belongs to the technical fields of radar technology and wireless communication, and in particular relates to a low-profile lens antenna based on reflective array feeding. It includes a primary feed, a flat reflective array with reflective array units printed under the primary feed, and a lens above the primary feed; the primary feed feeds the reflective array, and the reflective array compensates the phase of the electromagnetic wave by adjusting the size of the unit so that the electromagnetic wave passes through the lens. Form an amplitude distribution suitable for the application of the target body, and then form directional radiation through lens phase compensation. The invention has the characteristics of low profile, easy conformal shape, low cost, low loss and light weight, and can be used in microwave, millimeter wave radar and wireless communication systems that require low profile for high-gain antennas.

Description

technical field [0001] The invention belongs to the fields of radar technology and wireless communication technology, in particular to a low-profile lens antenna based on reflection array feeding, which is especially suitable for microwave, millimeter-wave radar and wireless communication systems that have low profile requirements for high-gain antennas. Background technique [0002] Traditional high-gain antennas mainly include parabolic antennas and phased array antennas, which are commonly used in wireless communications, radar detection and other fields. However, the traditional parabolic antenna is bulky and bulky, and it is difficult to achieve electronically controlled beam scanning; while the phased array antenna requires a complex feeding network with high loss, and the expensive TR components greatly increase its manufacturing cost. The proposal of microstrip planar reflect array antenna and transmission array antenna overcomes the shortcomings of traditional high-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/14H01Q15/02
CPCH01Q15/02H01Q15/14
Inventor 屈世伟吴耿波冯鹏雨杨仕文陈益凯
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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