Wideband Fractal Antennas for Holographic Imaging and Rectenna Applications

Conference · Fri Apr 18 04:00:00 EDT 2008

DOI:https://doi.org/10.1117/12.778265· OSTI ID:949127

Bunch, Kyle J; McMakin, Douglas L; Sheen, David M

At Pacific Northwest National Laboratory, wideband antenna arrays have been successfully used to reconstruct three-dimensional images at microwave and millimeter-wave frequencies. Applications of this technology have included portal monitoring, through-wall imaging, and weapons detection. Fractal antennas have been shown to have wideband characteristics due to their self-similar nature (that is, their geometry is replicated at different scales). They further have advantages in providing good characteristics in a compact configuration. We discuss the application of fractal antennas for holographic imaging. Simulation results will be presented. Rectennas are a specific class of antennas in which a received signal drives a nonlinear junction and is retransmitted at either a harmonic frequency or a demodulated frequency. Applications include tagging and tracking objects with a uniquely-responding antenna. It is of interest to consider fractal rectenna because the self-similarity of fractal antennas tends to make them have similar resonance behavior at multiples of the primary resonance. Thus, fractal antennas can be suited for applications in which a signal is reradiated at a harmonic frequency. Simulations will be discussed with this application in mind.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 949127
• Report Number(s): PNNL-SA-59203
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ANTENNAS
FRACTALS
HARMONICS
HOLOGRAPHY
Harmonic Radar
Holographic Imaging
IMAGES
MONITORING
Millimeter Waves
RECTENNAS
Rectanna
Widebanc Antennas
fractal Antennas