This application note presents a design of a printed inverted-F antenna (IFA) used in a radio-frequency identification (RFID) reader which has been introduced in mass production. The IFA was built and simulated using WIPL-D Pro CAD environment – the highly advanced method-of-moments (MoM) based EM simulation tool. Various real-life EM effects if IFA environment, such is influence of neighboring metallic objects, were taken into account. The simulation of the designed IFA used in RFID reader is carried out on a regular desktop PC in approximately one minute per frequency point. This is very efficient considering that the flexible substrate used to fabricate the antenna was very thin (100um) and that a complex environment surrounding the antenna has been completely included in the model.
The test samples of the inverted-F antenna have been fabricated and measured. The measurements have been found to be in an excellent agreement with the simulations.
Besides the core business of the WIPL-D company which is the development of the state-of-the-art full wave EM simulation tools, the consulting services are also the important asset of the company. This is the result of high competence and expert knowledge gained over the years and accumulated throughout customer support, continued education, collaboration with the universities, literature surveys, involvement in many consulting services and collaborative projects etc.