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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 20 — Jul. 10, 2009
  • pp: 3921–3929

Low-loss polynomial White cell optical true-time delay engine for wideband radio frequency array beam steering

Niru K. Nahar and Roberto G. Rojas  »View Author Affiliations


Applied Optics, Vol. 48, Issue 20, pp. 3921-3929 (2009)
http://dx.doi.org/10.1364/AO.48.003921


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Abstract

An optical true-time delay (OTTD) engine based on a polynomial White cell (quadratic) is designed and simulated with commercially available components with a time delay increment of at least 25 ps for wideband beam steering in the frequency range of 2 18 GHz . The simulated quantification of aberration losses show for the first time that aberration losses in the null cell are about 5.0 dB . However, for the longer delay arms, there is an additional loss of about 3.2 dB / delay each time a beam travels an arm with a lens train used as a delay element compared with the same delay generated without a lens train. We present a design and simulation of a low-loss delay arms quartic cell without a lens train by using a separate field lens for each delay arm for efficient wideband beam steering.

© 2009 Optical Society of America

OCIS Codes
(220.1000) Optical design and fabrication : Aberration compensation
(200.2605) Optics in computing : Free-space optical communication

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: March 16, 2009
Revised Manuscript: June 12, 2009
Manuscript Accepted: June 15, 2009
Published: July 2, 2009

Citation
Niru K. Nahar and Roberto G. Rojas, "Low-loss polynomial White cell optical true-time delay engine for wideband radio frequency array beam steering," Appl. Opt. 48, 3921-3929 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-20-3921


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References

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