Abstract
We present a broadband metasurface Luneburg lens for full-angle operation. The design of the Luneburg lens is based on an inverted substrate parallel-plate-waveguide structure with nonuniform circular holes etched on the upper metallic plate. We show that this structure is superior to existing designs as it allows significant simplification of the fabrication process. To achieve a smooth variation of the effective refractive index profile as well as circular symmetry for the Luneburg lens, sizevariable meta atoms are used for synthesizing the metasurface. The effective refractive index profile can be tuned by varying just the hole diameters. By introducing tapered microstrip ports that are evenly distributed on the circumference of the Luneburg lens, full-angle operation of the lens can be achieved. A prototype with a diameter of 400 mm is fabricated and experimentally evaluated at operating frequencies ranging from 6 GHz to 9 GHz. We show good conceptual agreement between simulated and experimental results.
| Original language | English |
|---|---|
| Pages (from-to) | 2442-2451 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 67 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1 Apr 2019 |
Keywords
- Antennas
- Atomic measurements
- Dielectrics
- Full-angle operation
- inverted substrate parallel-plate-waveguide
- Lenses
- Luneburg lens
- metasurface
- Microstrip
- Refractive index
- Substrates
Cite this
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Design of a broadband metasurface Luneburg lens for full-angle operation. / Li, Jianping; Jin, Ronghong; Geng, Junping; Liang, Xianling; Wang, Kun; Premaratne, Malin; Zhu, Weiren.
In: IEEE Transactions on Antennas and Propagation, Vol. 67, No. 4, 01.04.2019, p. 2442-2451.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Design of a broadband metasurface Luneburg lens for full-angle operation
AU - Li, Jianping
AU - Jin, Ronghong
AU - Geng, Junping
AU - Liang, Xianling
AU - Wang, Kun
AU - Premaratne, Malin
AU - Zhu, Weiren
PY - 2019/4/1
Y1 - 2019/4/1
N2 - We present a broadband metasurface Luneburg lens for full-angle operation. The design of the Luneburg lens is based on an inverted substrate parallel-plate-waveguide structure with nonuniform circular holes etched on the upper metallic plate. We show that this structure is superior to existing designs as it allows significant simplification of the fabrication process. To achieve a smooth variation of the effective refractive index profile as well as circular symmetry for the Luneburg lens, sizevariable meta atoms are used for synthesizing the metasurface. The effective refractive index profile can be tuned by varying just the hole diameters. By introducing tapered microstrip ports that are evenly distributed on the circumference of the Luneburg lens, full-angle operation of the lens can be achieved. A prototype with a diameter of 400 mm is fabricated and experimentally evaluated at operating frequencies ranging from 6 GHz to 9 GHz. We show good conceptual agreement between simulated and experimental results.
AB - We present a broadband metasurface Luneburg lens for full-angle operation. The design of the Luneburg lens is based on an inverted substrate parallel-plate-waveguide structure with nonuniform circular holes etched on the upper metallic plate. We show that this structure is superior to existing designs as it allows significant simplification of the fabrication process. To achieve a smooth variation of the effective refractive index profile as well as circular symmetry for the Luneburg lens, sizevariable meta atoms are used for synthesizing the metasurface. The effective refractive index profile can be tuned by varying just the hole diameters. By introducing tapered microstrip ports that are evenly distributed on the circumference of the Luneburg lens, full-angle operation of the lens can be achieved. A prototype with a diameter of 400 mm is fabricated and experimentally evaluated at operating frequencies ranging from 6 GHz to 9 GHz. We show good conceptual agreement between simulated and experimental results.
KW - Antennas
KW - Atomic measurements
KW - Dielectrics
KW - Full-angle operation
KW - inverted substrate parallel-plate-waveguide
KW - Lenses
KW - Luneburg lens
KW - metasurface
KW - Microstrip
KW - Refractive index
KW - Substrates
UR - http://www.scopus.com/inward/record.url?scp=85058984017&partnerID=8YFLogxK
U2 - 10.1109/TAP.2018.2889006
DO - 10.1109/TAP.2018.2889006
M3 - Article
VL - 67
SP - 2442
EP - 2451
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
SN - 0018-926X
IS - 4
ER -