Title

Reflectarray Design at Infrared Frequencies: Effects and Models of Material Loss

Authors

Authors

F. Yang; P. Nayeri; A. Z. Elsherbeni; J. C. Ginn; D. J. Shelton; G. D. Boreman;Y. Rahmat-Samii

Comments

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Abbreviated Journal Title

IEEE Trans. Antennas Propag.

Keywords

Infrared; loss effects; nanotechnology; reflectarray; solar power; MICROSTRIP REFLECTARRAY; FABRICATION; ELEMENTS; ANTENNAS; Engineering, Electrical & Electronic; Telecommunications

Abstract

Reflectarray designs at infrared (IR) frequencies are investigated in this paper. At the short-wavelength region, material loss becomes an important consideration in reflectarray designs. Based on the measured properties of conductors and dielectrics at infrared frequency, this paper investigates the loss effects on the reflection magnitude and phase of reflectarray elements. It is revealed that when the material loss exceeds a certain limit, the element reflection phase will vary within a narrow phase range instead of a full 360 degrees phase range. An equivalent circuit model is used to understand this phenomenon. Based on the investigation, alternative design methods for infrared reflectarrays are suggested to lower the loss effect. The low loss reflectarrays have great potential for infrared and visible range applications, such as a low profile planar concentrator for solar energy systems.

Journal Title

Ieee Transactions on Antennas and Propagation

Volume

60

Issue/Number

9

Publication Date

1-1-2012

Document Type

Article

Language

English

First Page

4202

Last Page

4209

WOS Identifier

WOS:000308460600020

ISSN

0018-926X

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