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Abstract
This article introduces a novel near-field focus (NFF) lens antenna with a three-dimensional (3-D) focus-steering capability operating at terahertz (THz) frequencies. The antenna consists of a pair of thin discrete dielectric lenses (DDL) placed above a stationary feed horn. First, we demonstrate that the DDL doublet’s in-plane synchronous counter-rotation and co-rotation could scan its focus radially and azimuthally, respectively. A multi-focus synthesis method that compensates the required transmission phases at multi-focus points is developed to further improve its near-field focus-steering performance. The DDL-based antenna can realize 3-D focus-scanning using a combination of rotation and linear translation mechanisms. 3-D printing is adopted to fabricate the THz antenna to simplify the manufacturing process and reduce the cost. Both numerical and experimental results demonstrate that the 15-mm-diameter antenna prototype can scan its focus in a 3-D cylindrical space with a diameter of 29 mm and a length of 8 mm at 300 GHz. The proposed 3-D focus-scanning antenna with a large field of view (FoV) of 72° will open new avenues for fast 3-D THz imaging applications.
| Original language | English |
|---|---|
| Pages (from-to) | 10007-10016 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 70 |
| Issue number | 11 |
| Online published | 30 Sept 2022 |
| DOIs | |
| Publication status | Published - Nov 2022 |
Funding
Research Grants Council of the Hong Kong SAR, China, through the General Research Fund (GRF) (Grant Number: CityU 11205819); Theme-Based Research Scheme (Grant Number: T42-103/16-N)
Research Keywords
- 3-D printing
- Antennas
- Dielectrics
- Focus steering
- Focusing
- imaging
- lens
- Lenses
- near-field-focus (NFF)
- Printing
- Radio frequency
- reconflgurable
- terahertz (THz)
RGC Funding Information
- RGC-funded
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Dive into the research topics of '3-D Printed 3-D Near-Field Focus-Scanning Lens for Terahertz Applications'. Together they form a unique fingerprint.Projects
- 2 Finished
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GRF: 3D Printed Lens Antennas for a 3D Terahertz Imaging Platform
CHAN, C. H. (Principal Investigator / Project Coordinator)
1/09/19 → 8/08/23
Project: Research
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TBRS: A Compact System for Terahertz Imaging and Spectroscopy
CHAN, C. H. (Principal Investigator / Project Coordinator), LO, K. W. K. (Co-Principal Investigator), LUK, K. M. (Co-Principal Investigator), PUN, Y. B. E. (Co-Principal Investigator), Pang, S. (Co-Principal Investigator), SHAW, J. (Co-Principal Investigator), VELLAISAMY, A. L. R. (Co-Principal Investigator), CHAN, S. C. (Co-Investigator), DECROZE, C. (Co-Investigator), HO, J. C. Y. (Co-Investigator), JARRAHI, M. (Co-Investigator), LAM, Y. W. (Co-Investigator), LEE, E.-Y. J. (Co-Investigator), LEE, N. P. Y. (Co-Investigator), LEUNG, K. W. (Co-Investigator), LIU, H. (Co-Investigator), QU, S. (Co-Investigator), RENAUD, C. (Co-Investigator), Tong, K. (Co-Investigator), WANG, C. (Co-Investigator), WONG, H. (Co-Investigator), WONG, C. Y. A. (Co-Investigator), WONG, M. H. A. (Co-Investigator) & Wong, K. K. Y. (Co-Investigator)
1/01/17 → 30/06/23
Project: Research