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Showing 1 to 20 of 137 for “"high gain"”.
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High Gain / Broadband Oxide Glasses For Next Generation Raman Amplifiers
… range of wavelengths is fixed and limited, Raman gain bandwidths are larger and the operating wavelength is fixed only by the pump wavelength and the bandwidth of the Raman active medium. In this context, glasses are the material of choice for this application due to their relatively broad …
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High Gain Low Power Operational Amplifier Design and Compensation Techniques
… method can be easily applied to the popular two gain stage op amp architectures with very little alteration. MOS devices are used in the weak inversion region or the subthreshold inversion region to minimize dc source power. A feasible configuration for high gain, low power op amp design …
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A high gain tri-reflector antenna configuration for beam scanning
High resolution earth observation from geostationary orbit offers several advantages compared to traditional low earth orbit systems. Among the advantages are decreased time to scan the visible geo-disk and the ability to stare at a particular event. The following work is concerned with the design …
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Beam-Steerable and Reconfigurable Reflectarray Antennas for High Gain Space Applications
… integration, the technique can be extended to higher frequencies such as V-band and above.
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Analysis and Synthesis of High-Gain and Variable Structure Feedback Systems
Made available in DSpace on 2014-12-12T20:54:49Z (GMT). No. of bitstreams: 1 7811311.pdf: 5095163 bytes, checksum: 0336260df9eb012652b70391a53ff44a (MD5) Previous issue date: 1978
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Wide-Band Amplifiers of High Gain - Bandwidth Product and Improved Efficiency
Made available in DSpace on 2014-12-04T21:02:58Z (GMT). No. of bitstreams: 1 0023366.pdf: 7382573 bytes, checksum: 61db85984f49cc77312c50764cb78f01 (MD5) Previous issue date: 1957
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Two new families of high-gain DC-DC power electronic converters for DC-microgrids
… centers, commercial buildings, and microgrids. A high gain dc-dc power electronic converter can be used to individually link low-voltage elements such as solar panels, fuel cells, and batteries to the dc voltage bus which is usually 400 volts. This way, it is not required to put such elements in a …
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Low-Pressure Metalorganic Chemical Vapor Deposition of High-Gain InGaP/GaAs Heterojunction Bipolar Transistors
… of the emitter and cap growth conditions on the gain of heterojunction bipolar transistors (HBTs) was studied by annealing to simulate the prolonged growth of HBTs with a heavily carbon-doped base. The results indicate that postgrowth annealing at a temperature close to the growth temperature of …
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Mitigating the effects of ribosome limitations on synthetic circuits via high-gain sRNA-mediated negative feedback
… the effects of resource limitations by adding a high-gain negative feedback loop to one of the circuits. The loop includes an sRNA construct. We explore different implementations of this circuit and model them mechanistically. Furthermore, we begin physically implementing one of the circuit …
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Design a high gain UWB mimo uniplanar monopole antenna with FSS array for metallic object microwave imaging
… loaded on the designed antenna that achieves a high rejection (S11=-1.75 dB) at the band of 3.0 GHz for 5G mid-band. A T-strip is inserted between the two proposed MIMO antennas to improve the isolation. Moreover, the smallest uniplanar UWB frequency selective surface (FSS) unit cell size …
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Dispersion Effects in a High Gain 3.39 Microns Helium - Neon Laser: Application to the Laser Heterodyne Measurement of Plasma Density
Made available in DSpace on 2014-12-08T22:24:28Z (GMT). No. of bitstreams: 1 6901385.pdf: 2497381 bytes, checksum: 3e4ae121c3a23a3d72679112406cd5a7 (MD5) Previous issue date: 1968
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Design and Analysis of an Electronically Steerable Microstrip Patch and a Novel Coplanar Waveguide (CpW) Fed Slot Antenna Array
… Antennas (CPAAs) are very attractive for their high gain, low profile, and beam scanning ability while being conformal to their mounting surface. Among them are microstrip patch phased arrays and wideband slot phased arrays which are of particular significance.</p> <p>In this work, first the …
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Size reduction of vivaldi antenna array for microwave imaging
… size, stable patterns of end-fire radiation and high gain find many of applications such as radar, microwave imaging, remote sensing. To achieve these goals, a compact-sized end-fire slot antenna (TSA) is a good candidate as it offers broad impedance bandwidth and stable radiation patterns, and …
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Critical Analysis Of Transmitarray Antenna Design
… theory, leading to a low profile design with high gain, high radiation efficiency, and flexible radiation performance. Transmitarrays are now emerging as a new generation of high-gain antennas for long-distance communications. In this dissertation, comprehensive analysis, new methodologies, …
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Application of adaptive trusses to vibration isolation in flexible structures
… The methods include force feedback through a high gain, and state feedback using the LQR method with disturbance modelling. A third method which has been demonstrated in the literature, force feedback through a classical compensator, is also presented for comparison. For the purpose of …
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Graphene Field-Effect Transistors on p-doped Semiconductors for Photodetection
… by low noise, broad-spectrum response, high responsivity, and fast response [46, 126]. These photodetectors utilize graphene as the active channel, with graphene deposited on an insulating layer and semiconductor substrate. The contact of graphene with an insulator/semiconductor …
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Advanced Design Methodologies and Novel Applications of Reflectarray Antennas
… and reflector antennas and create a hybrid high-gain antenna with a low-profile, low-mass, and diversified radiation performance. Reflectarrays are now emerging as the new generation of high-gain antennas for long-distance communications. In this dissertation, some advanced concepts …
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Comparator design and analysis for comparator-based switched-capacitor circuits
The design of high gain, wide dynamic range op-amps for switched-capacitor circuits has become increasingly challenging with the migration of designs to scaled CMOS technologies. The reduced power supply voltages and the low intrinsic device gain in scaled technologies offset some of the benefits …
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Log-Periodic Loop Antennas
… provides wide bandwidth, broad beamwidth, and high gain. This antenna has smaller transverse dimensions (by a factor of 2/pi) than a log-periodic dipole antenna with comparable radiation characteristics. Several geometries with different parameters are analyzed numerically using ESP code, which …
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Performance of four-stage cascaded fiber optical parametric amplifier (FOPA) using optisystem
… (FOPA). An FOPA has an ability to achieve a high gain and bandwidth. One of the approaches is a cascaded FOPA. A cascaded FOPA is a FOPA with two or more active media, commonly known as a highly nonlinear fiber (HNLF). Previous experimental work shows that the improvement in gain and …
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