RFID - Antenna Coil Design

[bigdogguru]

Please post your recommendations or critiques of Antenna Coil Design sites and docs concerning RFID Technologies.

I'm always on the lookout for any online RFID Antenna Coil Design resources.

One recommendation is the following site:


Microchip RFID Antenna Coil Design Appnote

 

[bigdogguru]

Low-frequency technology has been widely used for detecting objects placed underground. Low-frequency radio-frequency identification (RFID) systems provide the advantage of better propagation in lossy materials such as rocks and soil. In this paper, we assume that buried objects will be tagged with low frequency RFID passive transponders and that a reader with the large single-loop antenna will be used to detect the objects. We propose new orientation-insensitive transponder’s antenna. Simulated and measured results obtained from fabricated antennas based on the new design show some advantage over the traditional design. The new antenna offers a more uniform magnetic field pattern.

Magnetic-Field Coupling Characteristics of Ferrite-Coil Antennas for Low-Frequency RFID Applications

 

[bigdogguru]

Covers various coil shapes, includes inductance formulas

**broken link removed**

 

[bigdogguru]

RFID Reader Antenna Tutorial - What you need to know.


RFID Reader Antenna Tutorial

 

[bigdogguru]

Over the last several years, Radio Frequency Identification (RFID) has become a major market. With a large number of vendors, success will be determined by achieving a short time-to-market for the most creative ideas. In order to realize a fast time-to-market, fast and accurate electromagnetic (EM) analysis is an absolute requirement. This application note demonstrates using Sonnet to design a 13.56 MHz RFID inductor and a 900 MHz RFID antenna accurately and rapidly. Sonnet’s extreme accuracy is a result of being based on the FFT (Fast Fourier Transform), and Sonnet’s speed is the result of a revolutionary new interpolation (Adaptive Band Synthesis), both to be demonstrated. In addition, Sonnet’s automated features, including parameterization and optimization, allow the designer to evaluate a large number of alternatives in an incredibly short period of time. As the wireless markets consolidate, making the most efficient use of the best CAD tools, including Sonnet for electromagnetic analysis, is key to survival.


Using Electromagnetic Analysis for RFID Antenna Design