Reconfigurable Antenna for RFID Reader and Notched UWB Applications Using DTO Algorithm
In this article, the approach involving Dynamic Threshold Optimization (DTO) algorithm
is considered to optimize a new compact recon¯gurable antenna to be applied to triple band Radio
Frequency Identi¯cation (RFID) and to ultra wideband (UWB) antenna with multiple bands notched.
The antenna is implemented by using the existing techniques, such as loading an L-type band-stop
¯lter, inserting a split ring resonator (SRR) as well as connecting L branches to the radiation disk
proposed by us. In case of RFID applications, triple-band RFID 915/2450/5800MHz are achieved
separately. The results prove that this kind of antenna can be applied in RFID reader to avoid
interference with other wireless systems. RF MEMS switches are used to recon¯gure the antenna
to be suitable for the application in the notched UWB communication systems. The DTO algorithm
program is implemented using MATLAB-software and linked to the CST Microwave studio software to
simulate the antenna. In addition, the optimized antenna is assessed using the Finite Di®erence Time
Domain (FDTD) program written with MATLAB to validate the results. The experimental results for
the RFID and UWB antennas show good agreement with simulated ones. The radiation patterns are
satisfactorily omnidirectional across the antenna's operation bands.