Title

Comparison of dipole, bowtie, spiral and log-periodic IR antennas

Authors

Authors

F. J. Gonzalez;G. D. Boreman

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Infrared Phys. Technol.

Keywords

microbolometer; infrared antennas; antenna efficiency; antenna-coupled; detectors; Instruments & Instrumentation; Optics; Physics, Applied

Abstract

Antenna-coupled microbolometers use planar lithographic antennas to couple infrared radiation into a bolometer with sub-micron dimensions. In this paper four different types of infrared antennas were fabricated on thin grounded-substrates and coupled to microbolometers. Dipole, bowtie, spiral and log-periodic IR antenna-coupled detectors were measured at 10.6 μ m and their performance compared. A new method to calculate the radiation efficiency based on the spatial and angular response of infrared antennas is presented and used to evaluate their performance. The calculated radiation efficiency for the dipole, bowtie, spiral and log-periodic IR antennas was 20%, 37%, 25% and 46% respectively. A dipole-length study was performed and shows that the quasistatic value of the effective permittivity accurately describes the incident wavelength in the substrate at infrared frequencies for antennas on a thin substrate. © 2004 Elsevier B.V. All rights reserved.

Journal Title

Infrared Physics & Technology

Volume

46

Issue/Number

5

Publication Date

1-1-2005

Document Type

Article

Language

English

First Page

418

Last Page

428

WOS Identifier

WOS:000229553800010

ISSN

1350-4495

Share

COinS