In this letter, a Jaumann-like rasorber is examined, which offers wideband absorption, angular stability, and polarization insensitivity. The structure defined by three layers with two resistive placed on top of lossless layer. Also, all use capacitors to ensure compactness for the metasurface rasorber. These features provide broad stability up 55 <inline-formula xmlns:mml="http://www.w3.org/19...

s of Publications I–VI I The concept of coupled resonators is applied to synthesize surface-acoustic-wavefilters. Employing two parallel-connected filter tracks, with a frequency shiftimposed between them, a wide passband with low insertion loss together withwell-controlled rejections is achieved. The operation of the two-track device isbased on the mutual interaction of the ind...

The American National Standard, ANSI S12.42-2010 (R2020), specifies how to measure the impulse peak insertion loss (IPIL) for a hearing protection device (HPD) using an acoustic test fixture (ATF) with levels of LPeak = 132, 150, and 168 dB sound pressure level (dB pSPL). fixtures described in S12.42 have ear simulators that are limited below 172 pSPL. Two GRAS 45CB ATFs (with 40BP 40BH 1/4” mi...

A filtering power divider/power combiner based on half mode substrate integrated waveguide technology for high power applications is proposed. This design includes one half mode substrate integrated waveguide cavity, one matched load, and four sections of quarter-wavelength transmission lines. The high isolation between output ports is obtained by combining the half mode substrate integrated wa...

In this paper, a compact high-selectivity frequency tunable bandpass filter (BPF) with constant absolute bandwidth (ABW) based on varactor-loaded step-impedance resonators (SIRs) is presented. By introducing cross coupling between resonators, pair of transmission zeros (TZs) close to the passband are produced and selectivity enhanced significantly. Another TZs generated improve out-of-band reje...