Experimental Validation of the Beam Pattern of a Wide Band Quasi-Optical System for DESHIMA Spectrometer

Description

DESHIMA is a spectrometer for astronomical applications targeting sources at sub-mm wavelengths from 240GHz to 720GHz. In this work, the quasi optical system for this spectrometer is presented. This design is based on hyperhemispherical leaky lens antenna. The design procedure is based on a field matching technique in reception. By employing this methodology, the performance of the design is rapidly optimized over the whole 1:3 relative bandwidth. The achieved average illumination efficiency over
the band is approximately 70%. The directivity patterns in the sky are also estimated. The leaky lens antenna is fabricated, and the measurement of the system is ongoing. The beam pattern of the system at the beginning of the and is presented in this abstract. This beam pattern is obtained directly from the response of the super conductive Kinetic Inductance Detectors coupled to the antenna. The rest of the measurement will be presented at the conference

Period	16 Mar 2020
Event title	14th European Conference on Antennas and Propagation, EuCAP 2020
Event type	Conference
Conference number	14
Location	Copenhagen, Denmark
Degree of Recognition	International