Factors affecting READ RATES of RFID

After the presentation many groups seems to be interested in knowing the limitations and interferences that the RFID device might face.

We have collated basic interferences faced by RFID system with their possible remedies

ERROR	REASONS AND POSSIBLE REMEDIES
TRANSLUCENCE	Clothing made of organic and synthetic fibers, paper products, wood, non-conductive plastic and card boards are translucent to RF
ABSORPTION	Liquids, materials containing liquids such as foods, and liquids and foods containing salt in particular, will absorb UHF. Carbon containing compounds, such as graphite in solid or powder form also absorb UHF. It is possible to calculate the absorption rate of various rates of various substances to a certain frequency and the resulting dielectric loss. Positioning tags in the air gap just below the bottle cap may reduce absorption
SHIELDING	Metals and very thin metal foils particularly can conduct radio wave away from the target, not allowing it to pass through. In general higher frequency are more easily shielded than lower frequencies
DETUNING	Tag antennas are greatly affected by their immediate surroundings. A tag attached to a case of soft drink, for instance, is going to be more affected by its location than anything else. Tags that are placed too close together can capacitively couple to one another, detuning their antennas. The meta on conveyor, FLTs and other handling equipment can detune the tag. Tags with suitable antenna geometries, proper placement on individual cases, and proper case orientation on pallet can improve read rates. Package reengineering may also be required.
INTERFERENCE	“Dead Zones” due to the geometry of the environment. Conveyer apparatus can induce dead zones through vibrations or EM discharge from motors or controllers. Electronic discharge, from materials that accumulate static electricity and are not properly grounded, can also create interference.