PMID- 19593343
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20090923
LR  - 20190703
IS  - 1539-4522 (Electronic)
IS  - 1559-128X (Linking)
VI  - 48
IP  - 20
DP  - 2009 Jul 10
TI  - Low-loss polynomial White cell optical true-time delay engine for wideband radio 
      frequency array beam steering.
PG  - 3921-9
AB  - 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.
FAU - Nahar, Niru K
AU  - Nahar NK
AD  - Department of Electrical and Computer Engineering, The Ohio State University, 
      Columbus, Ohio 43210, USA. Nahar.2@osu.edu
FAU - Rojas, Roberto G
AU  - Rojas RG
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Appl Opt
JT  - Applied optics
JID - 0247660
EDAT- 2009/07/14 09:00
MHDA- 2009/07/14 09:01
CRDT- 2009/07/14 09:00
PHST- 2009/07/14 09:00 [entrez]
PHST- 2009/07/14 09:00 [pubmed]
PHST- 2009/07/14 09:01 [medline]
AID - 183367 [pii]
AID - 10.1364/ao.48.003921 [doi]
PST - ppublish
SO  - Appl Opt. 2009 Jul 10;48(20):3921-9. doi: 10.1364/ao.48.003921.