An Ultra-Wideband Leaky Lens Antenna for Broadband Spectroscopic Imaging Applications

Sebastian Hähnle, Ozan Yurduseven, Sven van Berkel, Nuria Llombart, Juan Bueno, Stephen J.C. Yates, Vignesh Murugesan, David Thoen, Andrea Neto, Jochem Baselmans

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)
71 Downloads (Pure)


We present the design, fabrication, and characterization of a broadband leaky lens antenna for broadband, spectroscopic imaging applications. The antenna is designed for operation in the 300-900 GHz band. We integrate the antenna directly into an Al-NbTiN hybrid microwave kinetic inductance detector (MKID) to measure the beam pattern and absolute coupling efficiency at three frequency bands centered around 350, 650, and 850 GHz, covering the full antenna band. We find an aperture efficiency \eta _{ap} \approx 0.4 over the whole frequency band, limited by lens reflections. We find a good match with simulations for both the patterns and efficiency, demonstrating a 1:3 bandwidth in the submillimeter wavelength range for future on-chip spectrometers.

Original languageEnglish
Article number9000802
Pages (from-to)5675-5679
Number of pages5
JournalIEEE Transactions on Antennas and Propagation
Issue number7
Publication statusPublished - 2020


  • Broadband antennas
  • submillimeter wave devices
  • superconducting devices
  • ultrawideband antennas


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