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This work describes the design, fabrication, and evaluation of three sets of multi-plane patch antennas fabricated using an enhanced 3D printing system. The antennas were embedded using a unique combination of thermal and chemical embedding techniques enabling the fabrication of multiple conductive non-orthogonal antenna layers constructed in a single build sequence. Potential devices include waveguides...
Recent advances in the field of 3D printing have utilized embedded electronic interconnects in order to construct advanced electronic devices. This work builds on these advances in order to construct and characterize arbitrarily formed capacitive sensors using fine-pitch copper mesh and embedded copper wires. Three varieties of sensors were fabricated and tested, including a small area wire sensor...
Biomedical and space applications require both reduced power consumption — extending the life of the battery — as well as reliable operation in harsh conditions particularly in the context of radiation or noise sources. A common approach for reducing power is to lower the supply voltage to the subthreshold regime (Vdd < Vth). However, subthreshold operation also results in an increased vulnerability...
A novel energy efficient, Single Event Upset (SEU)/Single Event Transient (SET) tolerant Flip-Flop (FF) design is proposed which is suitable for ultra-low power systems that operate between sub-threshold (250mV) and super-threshold (1.0V) supply voltages. In comparison to an existing sense-amplifier based radhard FF, the proposed FF provides equivalent SEU/SET resilience at super-threshold voltage...
Next generation electronics will be painted onto plastic substrates providing both functionality and physical flexibility. The corresponding manufacturing process will lead to significantly reduced cost; however the performance of the resulting circuits will not match many existing high-performance electronic circuits fabricated with traditional technology today. High performance is not always necessary,...
The behavior of emerging wireless sensor networks is often characterized by short bursts of computation and communication followed by long periods of inactivity. As the unit devices are typically powered by batteries, conservation of energy - particularly during idle time - is paramount. Subthreshold logic has been proposed for providing lower energy per operation than traditional CMOS, but does so...
Ultra-low power consumption often comes at the price of reduced performance for energy conscious electronics - particularly reconfigurable circuits. Operating devices at ultra-low voltage levels provides the lowest energy per operation, but can penalize the frequency of operation by several orders of magnitude. A more optimized approach is to segregate the logic based on performance requirements and...
This paper presents an educational outreach activity that utilizes a design competition to inspire pre-college students to continue their education at the university-level and enter into degree programs relating to science, engineering or mathematics (STEM). The competition was one of many activities included in TexPREP (Texas Prefreshmen Engineering Program), which involves high-achieving middle...
We propose a tuning method for micro-electro-mechanical systems (MEMS) gyroscopes based on evolutionary computation that has the capacity to efficiently increase the sensitivity of MEMS gyroscopes through tuning and, furthermore, to find the optimally tuned configuration for this state of increased sensitivity. We present the results of an experiment to determine the speed and efficiency of an evolutionary...
We report on the development of a hardware platform for integrated tuning and closed-loop operation of MEMS gyroscopes. The platform was developed and tested for the second generation JPL/Boeing post-resonator MEMS gyroscope. The control of this device is implemented through a digital design on a field programmable gate array (FPGA). A software interface allows the user to configure, calibrate, and...
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