Journal ArticleDOI
Quad-Band Polarization-Insensitive Millimeter-Wave Frequency Selective Surface for Remote Sensing
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TLDR
In this article, a millimeter-wave frequency selective surface (FSS) is presented for demultiplexing four atmospheric remote sensing bands with varying bandwidth (3-20 GHz) and frequency separation (50-195 GHz).Abstract:
A novel millimeter-wave frequency selective surface (FSS) is presented for demultiplexing four atmospheric remote sensing bands with varying bandwidth (3–20 GHz) and frequency separation (50–195 GHz). The unit cell (670 μm × 670 μm) is a circular metal mesh loaded with a monopole integrated concentric ring on a 175-μm-thick quartz substrate designed to reject 50–60 GHz (B1), 87–91 GHz (B 2), and 148–151 GHz (B3), and transmit 175–195 GHz (B4) for transverse electric (TE) and transverse magnetic (TM) polarizations at oblique incidence (25°−35 °). Transmission response of the cascaded FSS measured using a continuous-wave terahertz source showed insertion loss of 15 dB and higher in the reflection windows (B1, B2, and B3) and less than 0.5 dB in the transmission window (B4) for TE and TM polarizations at 30° incident angle.read more
Citations
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Journal ArticleDOI
Multiband, continuously tunable filter in 100–300 GHz range using a two-layer cavity of perforated, all-dielectric metasurfaces
Garima Joshi,R. Vijaya +1 more
Proceedings ArticleDOI
Single layer Ultra-Thin FSS structure with Quad Band characteristics used for Multi Band Applications
Joohi Garg,Mrinali Sharma +1 more
TL;DR: In this paper , a single layered frequency selective surface (FSS) design is proposed resulting in quad band characteristics, which is made using FR-4 substrate as the base for the patch elements.
References
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Book
Frequency Selective Surfaces: Theory and Design
TL;DR: In this article, the authors present a comparison of band-pass and Dichroic filter designs for one and two-dimensional periodic structures, and present an overview of the current state-of-the-art.
Journal ArticleDOI
THz Frequency Selective Surface Filters for Earth Observation Remote Sensing Instruments
TL;DR: This new class of quasi-optical filter exhibits an insertion loss <;0.3 dB at 700 GHz and can be designed to operate independently of the polarization of the incident signals at oblique incidence.
Journal ArticleDOI
Quasi-optical antennas for radiometric remote-sensing
R.J. Martin,D.H. Martin +1 more
TL;DR: The requirements for, and the design of, quasi-optical antennas for radiometric remote-sensing are discussed with particular reference to the Advanced Microwave Sounding Unit AMSU-B, which was designed and built by Matra Marconi Space UK for the UK Meteorological Office and is due to be placed in orbit on a satellite.
Journal ArticleDOI
Spatial demultiplexing in the submillimeter wave band using multilayer free-standing frequency selective surfaces
TL;DR: In this paper, a multilayer freestanding slot array is designed to give an insertion loss which is significantly lower than the value obtainable from a conventional dielectric backed printed frequency selective surface (FSS).
Journal ArticleDOI
Terahertz epsilon-near-zero graded-index lens.
Victor Torres,Victor Pacheco-Peña,Pablo Rodriguez-Ulibarri,Miguel Navarro-Cia,Miguel Beruete,Mario Sorolla,Nader Engheta +6 more
TL;DR: A complete theoretical analysis based on the waveguide theory and Fermat's principle is provided and numerical simulation results of two-dimensional and three-dimensional lenses, made of PEC and aluminum, respectively, and working in the terahertz regime, which show good agreement with the analytical work.