Very compact ultra-wideband slot antenna with integrated LTE band
摘要
This work presents a very compact ultra-wideband (UWB) slot antenna with an integrated long-term evolution (LTE) band at 2.6 GHz. The slot UWB antenna has a small size of 24 mm × 8 mm × 1.524 mm. Additional elementary slots (stepped slots) are etched in the back side of the antenna to obtain an UWB range by assembly the resonance frequency of each elementary slot. An F-shaped slot is integrated into the back side of the antenna to create a resonance frequency in the LTE band. For the experimental results, the proposed antenna provides two resonance frequency bands. The first mode is an UWB bandwidth between 3.1 and 12 GHz, and the second one operates at the LTE band between 2.58 and 2.73 GHz, where the reflection coefficient is less than − 10 dB. The radiation characteristics of the antenna are omnidirectional in the horizontal plane and bidirectional in the vertical plane. A good agreement is shown between the measured and simulated results in terms of impedance matching and radiation pattern.