229 GHz FSS for the MetOp second generation Microwave Sounder instrument

This paper describes the design of a frequency selective surface (FSS) which provides transmission of 228 - 230 GHz radiation and rejection from 164 - 191.3 GHz with insertion losses under 0.25 dB for TE wave polarization at 45° incidence. This state-of-the art filter topology consists of two air spaced freestanding perforated screens, comprising unit cell elements of resonant slots folded for the purpose of miniaturisation to enhance angular stability. The reported geometry enhances the angular stability (45° ± 10°) of the FSS beyond what is possible with canonical linear slots and satisfies the stringent electromagnetic performance requirements for signal demultiplexing in the quasi-optical feed train of the Microwave Sounder (MWS) instrument.

[1]  Ville Kangas,et al.  Development of a 23-230 GHz FSS for the MetOp Second Generation Microwave Sounder Instrument , 2013 .

[2]  Vincent Fusco,et al.  Micromachined 300 GHz high Q resonant slot frequency selective surface filter , 2004 .

[3]  Richard Marriott,et al.  The impact of Metop and other satellite data within the Met Office global NWP system using an adjoint-based sensitivity method , 2013 .

[4]  V. F. Fusco,et al.  165/183 GHz FSS for the MetOp second generation microwave sounder instrument , 2015, 2015 9th European Conference on Antennas and Propagation (EuCAP).

[5]  R. Cahill,et al.  Spatial demultiplexing in the submillimeter wave band using multilayer free-standing frequency selective surfaces , 2005, IEEE Transactions on Antennas and Propagation.

[6]  V. Fusco,et al.  THz Frequency Selective Surface Filters for Earth Observation Remote Sensing Instruments , 2011, IEEE Transactions on Terahertz Science and Technology.

[7]  Vincent Fusco,et al.  Polarisation Independent Frequency Selective Surface for Sub – mm Wave Quasi Optical Beamsplitting Applications , 2008 .

[8]  Vincent Fusco,et al.  Manufacture and performance of multilayer frequency selective surface mesh filters for sub-millimetre wave applications , 2004 .

[9]  V. Kangas,et al.  MetOp Second Generation Microwave radiometers , 2012, 2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad).

[10]  Vincent Fusco,et al.  Development of a Dual-Polarised 50 - 230 GHz FSS for the MetOp Second Generation Microwave Sounder Instrument , 2015 .