NDLI: Advances in scanning reflectarray antennas based on ferroelectric thin film phase shifters for deep space communications

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Advances in scanning reflectarray antennas based on ferroelectric thin film phase shifters for deep space communications

Content Provider	NASA Technical Reports Server (NTRS)
Author	Romanofsky, Robert R.
Copyright Year	2007
Description	Though there are a few examples of scanning phased array antennas that have flown successfully in space, the quest for low-cost, high-efficiency, large aperture microwave phased arrays continues. Fixed and mobile applications that may be part of a heterogeneous exploration communication architecture will benefit from the agile (rapid) beam steering and graceful degradation afforded by phased array antennas. The reflectarray promises greater efficiency and economy compared to directly-radiating varieties. Implementing a practical scanning version has proven elusive. The ferroelectric reflectarray, under development and described herein, involves phase shifters based on coupled microstrip patterned on Ba(x)Sr(1-x)TiO3 films, that were laser ablated onto LaAlO3 substrates. These devices outperform their semiconductor counterparts from X- through and K-band frequencies. There are special issues associated with the implementation of a scanning reflectarray antenna, especially one realized with thin film ferroelectric phase shifters. This paper will discuss these issues which include: relevance of phase shifter loss; modulo 2(pi) effects and phase shifter transient effects on bit error rate; scattering from the ground plane; presentation of a novel hybrid ferroelectric-semiconductor phase shifter; and the effect of mild radiation exposure on phase shifter performance.
File Size	887194
Page Count	14
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20070038333
Archival Resource Key	ark:/13960/t5hb43j9j
Language	English
Publisher Date	2007-09-01
Access Restriction	Open
Subject Keyword	Communications And Radar Phased Arrays Radiation Effects Beam Steering Ferroelectricity Semiconductors Materials Low Cost Space Communication Radiation Dosage Antenna Arrays Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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