Compact Dual-Linearly Polarized UWB Antenna for VHF/UHF Applications

Speaker: Dr. Idahosa A. Osaretin, Member of the Technical Staff at MIT Lincoln Laboratory will give a presentation on dual-pol UWB antennas for continuous transmit-receive operation from 100MHz to 2000MHz

Location: MIT Lincoln Laboratory A-Café              Refreshments served at 5:30pm

We present a compact dual-linearly polarized ultrawideband (UWB) antenna for continuous transmit-receive operation from 100MHz to 2000MHz. The antenna implements broadband transverse electromagnetic horn antenna concepts for high frequency operation and miniaturized dipole antenna concepts for low frequency operation. The flared horn section closer to the input feed is responsible for radiation above 1000MHz, while the overall radiating elements, including the folded ends, is responsible for radiation below 1000MHz. Bow-tie antenna concepts are implemented for broadband low frequency operation characteristics. The bore-sight realized gain monotonically increases from -15dBi at 90MHz to 0dBi at 600MHz, and remains approximately +4dBi above 1000MHz. The overall antenna fit into a volume package with diameter of 15 inches and height of 6 inches. We achieve antenna miniaturization by means of the Artificial Transmission Line (ATL) method, where the inductance and capacitance on the antenna structure are modified in a transmission line sense. Ferrite absorber treatment on the ground plane is also used to produce a compact antenna design. The antenna is designed such that linearly polarized fields can be radiated from two orthogonal antenna elements. This antenna is suitable for software-defined radio applications.

Bio:  Idahosa A. Osaretin (S’07–M’11) received a B.S. in Electrical and Computer Engineering in 2006, M.S. in Electrical Engineering in 2010, and Ph.D. in Electrical Engineering in 2011, all from the Ohio State University, Columbus OH. Since 2011, he has worked at MIT Lincoln Laboratory where he is currently a member of the Technical Staff. His current research interests include microwave radiometer design and analysis, compact reflector antenna design, compact and wideband horn feeds for reflector antennas, low profile ultra-wide band antenna design and analysis, microwave circuits, and electromagnetic wave propagation (radiation, scattering, and wave-guiding) in complex environments.

For more information, contact Antennas & Propagation chair, Raoul O. Ouedraogo, raoul.ouedraogo@ll.mit.edu

For directions please see: http://www.ll.mit.edu/about/map.html