Improvement of the Scanning Performance of the Extended Hemispherical Integrated Lens Antenna Using a Double Lens Focusing System

• Published in: IEEE transactions on antennas and propagation Vol. 64; no. 8; pp. 3698 - 3702
• Main Authors: Nguyen, N. T., Boriskin, A. V., Le Coq, L., Sauleau, R.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.08.2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE); Institute of Electrical and Electronics Engineers
• Subjects: Antenna radiation patterns; Antennas; Computer Science; Dielectric constant; Directivity; Double lens (DL) system; Electronics; Engineering Sciences; Feeds; field of view (FoV); Focusing; Frequency ranges; Gain; immersion lens; integrated lens antenna (ILA); Lens antennas; Lenses; millimeter-wave antennas; Networking and Internet Architecture; objective lens; Permittivity; Radar imaging; Substrates; Microwave antennas; Immersion lens; Dielectric materials; Double lens (DL) system; Integrated lens antennas; Optical instrument lenses; Field of views; Objective lens; Lens antennas; Scanning antennas; Millimeter waves; Millimeter-wave antennas; Antennas
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2016.2572227

We demonstrate that an integrated lens antenna (ILA) with a double lens (DL) focusing system can provide simultaneously a high broadside directivity and a low scan loss over a wide angular range. The proposed DL ILA system consists of a hemispherical substrate lens and a planoconvex objective lens. A prototype of a high-gain DL ILA with lenses made of a low permittivity dielectric material is fabricated and characterized in the frequency range of 75-79 GHz. The realized scan loss in terms of gain within a ±30° field of view is <;1.1 dB in both planes. The performance of the DL ILA is compared with that of two hemispherical ILAs designed to provide the best broadside directivity and the lowest scan loss, respectively.