The Design Of 13.56MHz RFID Reader Antenna With Parameter Constrained

In recent years, the antenna as an important component of RFID (Radio Frequency Identification) system, in which plays a key role. Antenna is the air interface of RFID system, act as a bridge for message transmission between reader and electronic tags. So there has the reference value in the research of RFID reader’s antenna. RFID has some advanced features such as robust information safety, large storage capacity, and so on. It is considered as the most potential alternative of bar code. The development of the Internet of things promotes the advance of RFID technologies. So the RFID antenna has become the research hotspot of the universities and enterprises.Due to the restriction of the actual environment, antenna’s miniaturization has been focused on by the researchers. And the rapid development of wireless communication raises the requirements for antenna’s miniaturization higher and higher.This thesis mainly studies the simulation and design of 13.56 MHz RFID reader antenna with parameter constrained. Trying to optimize the miniaturized antenna’s performance and enhance the recognition distance. With the aid of the 3D electromagnetic simulation software Ansoft HFSS and MATLAB’s image processing function, compared the magnetic field strength between different designing parameters with area and perimeter limited respectively, in order to estimate the performances of antennae. Trying to find out specific parameters of a loop antenna with area or perimeter constrained that has a good performance. In this paper, a lot of simulation works were made by HFSS, and the refined designs will be chosen to make real antennae for test. The test results are consistent with the simulations, thus verifies the accuracy of the simulation. The studying results have some reference value for RFID reader antenna’s design and production.