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This paper discusses capillary self-alignment assisted hybrid microassembly of chips on low precision patterns, in both the precision of the dimension and the precision of the edge smoothness. Special segmented patterns having jagged edges have been purposely designed and fabricated to mimic some real-world RFID antennas. Experimental tests have been carried out to investigate influence of the dimension...
This paper reports a novel process that positions RFID chips on segmented artificial antenna pattern using hybrid assembly technology. A droplet of water is firstly dispensed to an artificial pattern composed of four pads. Then a 730×730μm RFID chip with four bumps of 20μm in height is released onto the artificial pattern using a robotic microgripper. Finally the RFID chip is self-aligned with the...
Swallowable capsule with wireless data transferring enables diagnostic of whole gastrointestinal track (GI) without invasive surgical operation. The capsule travels through GI driven by natural perilstatics. Sensors in the capsule can collect data and send them wirelessly to a receiver outside of the body. Irritable Bowel Syndrome (IBS) is a common functional disease in western society. The objective...
In order to improve the reading distance of portable RFID system effectively, the relationship of tag activating distance and transmitting power of reader is particularly analyzed and proved by experiment in this paper. A method for piecewise amplifying signal is proposed by analyzing the action of consumed power of tag and the reader's minimum receiving power.
In this paper, we study the effect of channel estimation error at the receiver on the mutual information of a multiple-input-multiple-output (MIMO) channel obeying correlated Rayleigh fading. The system model is constructed based on the channel estimation error at the receiver side. And using the properties of Wishart distribution, the lower bound on the channel capacity is derived when the MIMO channel...
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