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This paper reports on the design and development of a compact micro-electrocorticography (μECoG) system. The system is designed to record 8 channels of ECoG signals. Recorded neural data are sent off the system through a capacitive data telemetry link to the external world. The system has been prototyped using off-the-shelf electronic components and custom-designed electrodes, link, and package. For...
A thin high gain switched beam (0°, 25° and 335°) parasitic antenna array is presented. Using a non-uniform aperiodic EBG array thickness of 0.04 wavelength and 8.4 dBi peak gain is achieved. The Forward-to-Back ratio (F/B) is as high as 30 dB.
In this study, a low cost highly directive 1×4 end-fire dipole antenna array is designed and presented, providing 9.3dB gain. This array is going to be mounted on the wings of a Remotely Piloted Aircraft System (RPAS) to ensure reliable and secured links with the Ground Control Station (GCS) over large distances. Moreover a 2×4 low cost multi-layer patch antenna array with 14dB gain, placed on the...
Solder balls encounter large stresses due to the inherent mismatch of the coefficient of thermal expansion (CTE) between a large ceramic ball grid array (CBGA) and a glass-epoxy printed circuit board (PCB). The array of solder balls are stretched and squeezed with considerable strain from corner to corner across a large square CBGA module, as the temperature swings plus and minus 100o C from hot to...
We have examined printing technology to be adaptable to TSV forming process such as isolation layer forming and via fill. The result shows good possibility.
This paper presents a methodology for design a more reliable printed microstrip Rotman lens with the support of electromagnetic simulation software. A lens with four beam ports and four array ports in the range of 4 to 6 GHz is developed and manufactured with simulated and measured results of reflection coefficient, isolation and radiation pattern, showing a good performance of this methodology.
An array antenna is composed antenna elements and feed circuit network, and different substrates are often used to suppress degradation of antenna performance. Conventionally, interconnecting structure such as connectors or jigs in order to connect these substrates to each other. ACP is suitable to connect antenna substrate and feed network. In this paper, a 16-element feed-circuit-integrated patch...
This study demonstrates a novel polymer-based flexible strain-gauge sensor for flexible input devices in flexible displays. Proposed novel strain-gauge sensor for user interfaces (UIs) in flexible display measures the deformation of an object by using its electrical resistance change. This strain-gauge sensor was fabricated by the double-sided fabrication method with polymer and metal, i.e., polyimide...
Herein a glucose biofuel cell capable of producing micro-watts power has been presented. The bioanode and the biocathode were fabricated using glucose oxidase and oxygen reducing laccase, respectively immobilized on a 4 × 4 Au nanotip pyramidal electrode array having a tip diameter of ∼62 nm with an electroactive surface area of 0.04 cm2. The power generating capability of the glucose biofuel cell...
In this paper, we present a novel sensor array manufacturing process that involves transfer printing methods using adhesive rubber stamps mounted on a chip mounter. By using these methods, not only ultrathin microsensors but also microcontroller and amplifier chips required for the fabrication of sensor devices can be mounted. We successfully transfer-printed a very fragile 5-mm-long, 1-mm-wide, 5μm-thick...
This paper presents a new high gain longitudinal slot array antenna based on substrate integrated waveguide (SIW) technology for millimeter wave application, which can achieve wide impedance bandwidth. Three prototype with impedance bandwidth lower than -10 dB from 60 to 65 GHz with a minimum 14dBi and maximum 27dBi peak gain are designed. Computed analysis results of the three designed arrays show...
We demonstrate an integrated dual-color InGaN light-emitting diode (LED) array by transfer printing blue LED structures from their silicon growth substrate in between the pixels of a pre-processed green LED array on a sapphire substrate.
In this paper, a design of a compact projector and hydrophone array is proposed. The FEM is utilized to simulate the performance of the projector and hydrophone, and several design parameters are optimized to achieve higher and flatter sensitivity/TVR response over the working frequency band. The measured performance of the manufactured compact array verifies the validity of the design.
Through-silicon via (TSV) based 3-D ICs provide a promising solution for miniaturizing chips. However, thermal issue in 3-D ICs cannot be ignored. In this paper, we proposed a method based on 3-D transmission line matrix (3-D TLM) method to calculate heat generation in the lossy silicon substrate caused by TSV induced electrical field. Pseudo random bit sequences (PRBS) at different bit rates are...
An antenna sub-array configuration and the design of the antenna element for a dual-polarized X-band SAR application are presented. The antenna element is based on an aperture-coupled stacked patch that, unlike typical designs, does not include any foam layers. The sub-array including the antenna elements and the feed-network can be realized using currently available multi-layered printed circuit...
A high gain frequency selective surface (FSS) superstrate antenna at 79 GHz is presented. The maximum gain of a single antenna with FSS layer is 17.9 dBi at 79 GHz, which is near to the gain of a classical 4 × 4 array. It is found that the gain of a single FSS superstrate layer increases nearly 11.61 dB at 79 GHz over its basic membrane antenna. The measured 2∶1 VSWR bandwidth with FSS layer is from...
In this paper, a 6 × 6 planar slot array based on a hollow substrate integrated waveguide (HSIW) is presented. To eliminate the tilting of the main beam, the slot array is fed from the centre at the back of the HSIW, which results in a blockage area. To reduce the impact on sidelobe levels, a slot extrusion technique is introduced. A simplified multiway power divider is demonstrated to feed the array...
Stacked dielectric resonator antenna from high-k low loss bulk-glass ceramic material have been investigated. Two resonators are stacked with an air gap which has been realized with a low loss foam material. The antenna showed a wide bandwidth with the dimension of 7.7×6.7×2.5mm for the lower dielectric resonator and 8.7×7.7×3.3mm for the upper dielectric resonator. Thus the maximum dimension is 0...
A planar substrate integrated waveguide slot-fed microstrip grid array antenna for the frequency range 76–81 GHz is presented. The antenna is realized on a standard soft RF substrate. It is fed using a transverse slot in a substrate integrated waveguide on a separate substrate layer below the antenna. A wideband microstrip to substrate integrated waveguide is designed to feed the antenna. Measurement...
As flash memory has advantages of high data throughput, high storage density, low power consumption and low cost, it has been widely used in the applications of high speed data acquisition and massive data storage. However, the flash chip generates bad blocks during its service life, which leads to the loss of data. Hence a bad block management in the system of flash memory array is essential to ensure...
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