نتایج جستجو برای: ism band
تعداد نتایج: 140400 فیلتر نتایج به سال:
For fully autonomous implantable or body-worn devices running on harvested energy, the peak and average power dissipation of the radio transmitter must be minimized. We propose a highly integrated 90μW 400MHz MICS band transmitter with an output power of 20μW leading to a 22% global efficiency — the highest reported to date for such systems. We introduce a new transmitter architecture based on ...
In this study, a direction-finding array antenna with an improved front-to-back ratio was developed by inserting meander slots into the ground plane of electrically small antenna. The proposed slot structure improves capabilities while maintaining compact overall size is 58 mm×58 mm×40 mm, each element measuring 40 mm×22 mm×1.6 mm. consists eight elements attached to vertical column, forming oc...
This paper presents a compact antenna based on two different metamaterial resonators, the E-shape resonators and interdigital suitable for biomedical implant applications. The proposed antennas operate in industrial, scientific, medical (ISM) bands frequency band of 2.4–2.5 GHz. integration (MTM) into design led to reduced size these gaining enhancement. overall is $$8\times 7\times 1.27{\mathr...
We present the first images of the pulsar wind nebula (PWN) MSH 15−52 in the hard X-ray band (> ∼8 keV), as measured with the Nuclear Spectroscopic Telescope Array (NuSTAR). Overall, the morphology of the PWN as measured by NuSTAR in the 3–7 keV band is similar to that seen in Chandra high-resolution imaging. However, the spatial extent decreases with energy, which we attribute to synchrotron e...
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