Abstract
In this paper, both frequency and time domain performances of a new compact planar antenna for the ultra-wideband (UWB) applications are fully investigated. The proposed antenna has the size of 12x18 mm² providing a fractional bandwidth more than 128123% (3.057 GHz to 13.98 GHz, S11<-10 dB). The results show that the proposed antenna performances in term of wide bandwidth, small size, gain and radiation pattern, transmission coefficient and system fidelity factor are very satisfactory. Moreover, by fabricating and testing the proposed antenna, the simulation results are fairly verified.
Highlights
The increased needs of surveillance in different fields led to make the humankind more curious about the unseen and the unknown
Ultra-wideband is one of the widely used technologies in the microwave imaging systems since the Federal Communication Commission (FCC) allocated the spectrum from 3.1 GHz up to 10.6 GHz in 2002 [2] for this technology communications. It can be defined as any technology using signals that have a bandwidth (BW) greater than 500 MHz or have a fractional bandwidth (FBW) greater than 20% of the center frequency, as described in (1) and (2) [3]
The proposed antenna provides a good performances in term of gain and the radiation patterns are stable in the desired frequency band
Summary
The increased needs of surveillance in different fields led to make the humankind more curious about the unseen and the unknown. It is a good alternative for the other methods of detection [1] Thanks to their advantages, ultra-wideband is one of the widely used technologies in the microwave imaging systems since the Federal Communication Commission (FCC) allocated the spectrum from 3.1 GHz up to 10.6 GHz in 2002 [2] for this technology communications. Micro-strip printed planar antennas attract tremendously many antenna’s designers thanks to their interesting characteristics meeting the above criteria, which allow them to be used in emerging UWB applications This type of antennas consist of a radiating element (patch) which can take several shapes , substrate and ground plane that can be either full or partial. Numerical simulations are conducted to evaluate the antenna performance in both frequency and time domain
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