This paper presents a low loss and high selective lowpass filter which is implemented using suspended stripline (SSL) technology. The proposed structure is comprised of a 13th order generalized Chebyshev lowpass filter which enjoys integrated waveguide-to-SSL transitions. This filter is designed and fabricated to be used as lowpass channel of a U-band diplexer employed in frontend of a U-band d...

While visually complex stimuli such as human faces contain information across a wide range of spatial frequencies, information related to specific perceptual judgements may be concentrated in distinct spatial frequency bands. For example, previous work on static face perception has shown that face recognition relies primarily on low spatial frequency information while other tasks, such as ident...

An phase-sensitive amplifier (PSA) is capable of low-noise optical amplification. A frequency non-degenerate PSA (ND-PSA) requires idler light co-propagating with signal light. Therefore, spectral efficiency reduced by at least half compared to the system using phase-in-sensitive amplifiers such as an erbium-doped fiber amplifier. In this letter, we propose and demonstrate inter-band amplificat...

In this document, the Commission seeks comment on how to amend its rules to implement certain provisions of the Local Community Radio Act of 2010 (‘‘LCRA’’) that are not already the subject of Commission action. It also proposes changes to its rules intended to promote the low power FM service’s localism and diversity goals, reduce the potential for licensing abuses, and clarify certain rules.

This study evaluates the impact of underwater ambient noise using seven real noise samples; Dolphin, Rain, Ferry, Sonar, Bubbles, Lightning, and Outboard Motor in three frequency ranges in extremely low frequency (ELF) band. The ELF band is the most significant bandwidth for underwater long-range communication. ELF band which is extended from 3 to 3000 Hz clearly, faces bandwidth limitation. Me...