نتایج جستجو برای: vhf circuit
تعداد نتایج: 118032 فیلتر نتایج به سال:
This paper reports on implementation and high-Q operation of thick bulk mode VHF capacitive disk resonators with reduced motional resistance. Single crystal silicon (SCS) disk resonators as thick as 18 m with capacitive gap size of 160nm (aspect ratio>110) are fabricated on SOI substrates using a three-mask version of the HARPSS on SOI process. The new resonator design with increased number of ...
rr HE AEROVOX RESEARCH WORKER for July, 1949 contained a discussion of the fundamental properties of the half -wave dipole antenna and defined three basic configurations in which multiple dipoles are used to obtain desirable directional effects in transmitting or receiving radio signals. These arrangements included; collinear dipoles, broadside dipoles, and end -fire dipoles of both the driven ...
This article outlines a research program for an anthropology of viral hemorrhagic fevers (collectively known as VHFs). It begins by reviewing the social science literature on Ebola, Marburg, and Lassa fevers and charting areas for future ethnographic attention. We theoretically elaborate the hotspot as a way of integrating analysis of the two routes of VHF infection: from animal reservoirs to h...
In this paper, together with its Part II, the impact of relaying and adaptive modulation and coding (AMC) on data throughput in narrowband wireless multi-hop networks is investigated. This part focuses on the physical layer of a single-carrier narrowband time division multiple access (TDMA) transmission in the very high frequency (VHF) band. The transmission chain is designed for a narrowband, ...
This work deals with the design of multimode/multifrequency airborne radar suitable for imaging and subsurface sounding. The system operates at relatively low frequencies in the band ranging from VHF to UHF. It is able to work in two different modalities: (i) nadir-looking sounder in the VHF band (163MHz) and (ii) side-looking imager (SAR) in the UHF band with two channels at 450MHz and 860MHz....
We report the experimental in situ characterization of 30-40 MHz and 868 MHz wireless transmission schemes for ingestible capsules, in porcine carcasses. This includes a detailed study of the performance of a magnetically coupled near-field very high-frequency (VHF) transmission scheme that requires only one eighth of the volume and one quarter of the power consumption of existing 868-MHz solut...
floorplanning is an important step in physical design of vlsi circuits. it is used to plan the positions of a set of circuit modules on a chip in order to optimize the circuit performance. however, modern floorplanning takes better care of providing extra options to place dedicated modules in the hierarchical designs to align circuit blocks one by one within certain bounding box for helping seq...
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