This application note is intended to provide guidelines for designing a CR95HF antenna which impedance matches to the CR95HF impedance. This allows to achieve the best RF communications between the CR95HF transceiver integrated circuit (IC) and ISO15693 or ISO14443 RF memory tags.
This document outlines the design guidelines for creating an antenna that impedance matches the CR95HF transceiver IC to optimize RF communications with ISO15693 or ISO14443 RF memory tags. It details the equivalent circuit of the DEMO-CR95HF-A demonstration board and explains the necessity of impedance matching to maximize power transfer and read range. The note covers the calculation of inductive antenna parameters and provides criteria for key antenna design, including inductance calculations for circular, spiral, and square antennas.
The CR95HF requires an inductive antenna to communicate at a frequency of 13.56 MHz.
The DEMO-CR95HF-A antenna measures 47 mm x 34 mm.
Each generator has an output impedance of 13.5 Ω.