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THz 2-D Frequency Scanning Planar Integrated Array Antenna With Improved Efficiency
- Source :
- IEEE Antennas and Wireless Propagation Letters. 20:983-987
- Publication Year :
- 2021
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2021.
-
Abstract
- A THz 2-D frequency scanning planar integrated array antenna is developed in this letter. Eight THz leaky-wave antennas are combined with a true-time-delay (TTD) phase-shifting feeding network to steer the beam in two directions by sweeping the frequency. Several H-plane 90° bends with linearly increased length are adopted to achieve the scalable TTD phase shift. The feeding lines are closely spaced to reduce the phase-shifting network occupied area in this progressive phase-shifting scheme. Besides, the E-plane 180° bend is used to construct the double-layer phase-shifting network, maintain the number of multiple scanning sweeps and improve the aperture efficiency. Moreover, in the used microelectromechanical systems (MEMS) fabrication technique, the minimum height of the radiation slot is 0.2 mm, which is too thick and deteriorates the radiating performance. When the double-layer step-profiled radiating slot is used instead of the thick slot, a THz leaky-wave antenna with higher radiation efficiency and better gain flatness can be achieved. Finally, a prototype antenna is fabricated and experimentally validated. The operating frequency range is 325–400 GHz and the beam scanning range is 22.7° × 60° with a maximum radiation gain of 25.28 dBi.
- Subjects :
- Microelectromechanical systems
Materials science
business.industry
Aperture
Terahertz radiation
Flatness (systems theory)
Beam steering
020206 networking & telecommunications
02 engineering and technology
Antenna efficiency
Planar
Optics
0202 electrical engineering, electronic engineering, information engineering
Electrical and Electronic Engineering
Antenna (radio)
business
Subjects
Details
- ISSN :
- 15485757 and 15361225
- Volume :
- 20
- Database :
- OpenAIRE
- Journal :
- IEEE Antennas and Wireless Propagation Letters
- Accession number :
- edsair.doi...........675f2bb7ddcf3a62e7dc8ee2a934ad90