Dual resonant compact frequency agile microstrip antenna

In this contribution, an efficient miniature dual resonant frequency agile antenna for LTE band 20 communication device is presented. The antenna instantaneous bandwidth has been reduced from 71 MHz to two 10 MHz wide frequency band in order to only cover one band 20 channel at a time. This bandwidth reduction has enabled the antenna miniaturization without significant impact on its radiation efficiency. Frequency agility has been used to keep the antenna capable to cover all the band 20 channels. The presented design exhibits a reflection coefficient lower than -10 dB and an efficiency higher than 70% over the whole LTE band 20 despites a miniaturization factor of 3 compared to classical solutions.