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Ultra-Wideband Antennas

Ultra-wideband (UWB) antennas have numerous advantages compared to their narrow-band counterparts. They can significantly reduce the footprint of a system by replacing multiple antennas traditionally needed to cover numerous bands. For imaging and sensing, the dataquality can be improved since a wider band corresponds to a higher information content. For defense applications, UWB communication is desirable as the system can continue to function when a specific frequency band is jammed.

Fig. 1: UWB Vivaldi antenna schematic with pseudo element and corrugation.

The goal of this project is to design an UWBantenna that operates over the 2.5 GHz to 57 GHz band while maintaining favorable radiation patterns and input impedance levels. An antipodal Vivaldi antenna was chosen due to its inherent UWB nature as well as its ease of feeding.Our design, shown in Figure 1,achieves maximum realized gain of 15 dBi at 32 GHz. Antenna gains is larger than 11 dBi for frequencies between 6 to 57 GHz.

Figure 2: Realized gain vs. frequency for the UVW antenna.

Related Paper:

E. Yetisir, J. T. Li and N. Ghalichechian, “UWB Dual-polarized Dipole Array with Dielectric and FSS Superstrate and 65° Scanning ,” IET Microwaves, Antennas & Propagation, 2018.

J. Eichenberger, E. Yetisir and N. Ghalichechian, "Antipodal UWB Vivaldi Antenna with Pseudoelement and Notched Flares for 2.5-57 GHz Applications," 2018 IEEE International Symposium on Antennas and Propagation (APS URSI), Boston, MA, 2018.