Low-THz Dielectric Lens Antenna with Integrated Waveguide Feed

Research output: Contribution to journalArticlepeer-review

Colleges, School and Institutes


A novel dielectric lens antenna with a broadband integrated waveguide-based feed and an optimized tapered extension is presented for low TeraHertz frequencies. The antenna consists of an extended hemispherical lens fed by a standard WR-3 rectangular waveguide fitted directly at the bottom of the lens. The antenna has been designed for high resolution imaging radar systems requiring very wide bandwidth performance and highly directive beams. A novel matching technique based on an air pocket etched off the lens dielectric is employed to obtain broadband antenna operation covering the entire dominant-mode bandwidth of the waveguide. In addition, a new taper shaped lens extension is proposed for the first time and optimized to achieve improved sidelobe level and gain performance. The antenna is compatible with newly developed waveguide-based automotive radar and communications systems. The operating 3dB gain bandwidth is 30% (230GHz - 310GHz) achieving a maximum of 30dB measured gain. The measured S11 is well below -14dB across the WR-3 band.


Original languageEnglish
Pages (from-to)572 - 581
JournalIEEE Transactions on Terahertz Science and Technology
Issue number5
Early online date20 Jul 2017
Publication statusPublished - 20 Jul 2017


  • integrated lens antennas, submillimeter wave , imaging systems