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Integrated Ultra-Low-Loss 4-Bit Tunable Delay for Broadband Phased Array Antenna Applications

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8 Author(s)
Moreira, R.L. ; Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA, USA ; Garcia, J. ; Li, W. ; Bauters, J.
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We demonstrate the design, fabrication, and characterization of a 4-bit tunable delay in an ultra-low-loss ${rm Si}_{3}{rm N}_{4}$ planar platform. Temporal delays up to 12.35 ns with resolution of 0.85 ns are measured, for a total of 2.407 meters of propagation length. The TE waveguide propagation loss is measured to be $(1.01pm 0.06)~{rm dB}/{rm m}$ at a wavelength of 1550 nm with the lowest loss of $(0.57pm 0.08)~{rm dB}/{rm m}$ at 1591 nm.

Published in:

Photonics Technology Letters, IEEE  (Volume:25 ,  Issue: 12 )

Date of Publication:

June15, 2013

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