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In this paper, transmission characteristics affected by a relative position between a noise suppression sheet (NSS) placed on a periodic metal film and a transmission line are examined. A microstrip line (MSL) based on IEC standard (IEC62333-2) is fabricated, and transmission characteristics of the MSL placed on two types of NSS are measured.
We developed an evolutional wideband (3M~26MHz) short-wave transmitter with an output of 1kW using PSM (pulse step modulation) that digital (DRM: Digital Radio Mondiale) and analog AM modulation are possible. This equipment employs digital processed PSM method that high sound quality can be easily achieved in the modulation section and class E amplification for obtaining higher efficiency in the PA...
We developed an evolutional wideband (3 to 26 MHz) short-wave transmitter with an output of 1 kW using PSM (Pulse Step Modulation) that digital (DRM: Digital Radio Mondiale) and analog AM modulation are possible. This equipment employs digital processed PSM method that high sound quality can be easily achieved in the modulation section and Class-E amplification for obtaining higher efficiency in the...
The stresses at transducer contacts were estimated from accurate particle velocity measurements by using a laser Doppler vibrometer (LDV). We then evaluated the performance of LDV for ultrasonic waveform measurements in physical model experiments that are employed for modeling seismic observations. For such experiments, the characteristics of the source and detector should be exactly known. Discshaped...
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