Systematic study of the cross polarization introduced by broadband antireflection layers at microwave frequencies

Valeria Tapia; Rafael Rodríguez; Nicolás Reyes; F. Patricio Mena; Pavel Yagoubov; Francesco Cuttaia; Leonardo Bronfman

doi:10.1364/AO.57.009223

Applied Optics
Vol. 57,
Issue 31,
pp. 9223-9229
(2018)
•https://doi.org/10.1364/AO.57.009223

Systematic study of the cross polarization introduced by broadband antireflection layers at microwave frequencies

Valeria Tapia, Rafael Rodríguez, Nicolás Reyes, F. Patricio Mena, Pavel Yagoubov, Francesco Cuttaia, and Leonardo Bronfman

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Valeria Tapia, Rafael Rodríguez, Nicolás Reyes, F. Patricio Mena, Pavel Yagoubov, Francesco Cuttaia, and Leonardo Bronfman, "Systematic study of the cross polarization introduced by broadband antireflection layers at microwave frequencies," Appl. Opt. 57, 9223-9229 (2018)

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- Instrumentation and Measurements
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About this Article
History
- Original Manuscript: August 10, 2018
- Revised Manuscript: September 28, 2018
- Manuscript Accepted: October 1, 2018
- Published: October 25, 2018

Abstract

Implementation of antireflection layers using structured materials is of common use in millimeter- and submillimeter-wave refractive optic systems. In this work we have systematically studied the effect of such structures in the optical propagation with special emphasis on the cross polarization they introduce. We have performed extensive simulations and experimental verification of several commonly used structures: concentric grooves, parallel grooves, an array of boxes, an array of cylinders, and rectangular- versus triangular-shaped grooves. As a result, we propose optimal structures for demanding applications in terms of polarization and return losses over large fractional bandwidths.

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CRG	CTG	TBL	PTG	TCL
$d = 0.54$	$d = 0.80$	$d_{1} = 0.64$	$d = 0.64$	$r_{1} = 0.73$
$p = 1.00$	$β = 20.00 °$	$d_{2} = 0.73$	$β = 20.00 °$	$r_{2} = 0.40$
$L = 0.50$		$k_{1} = 0.22$		$h_{1} = 0.68$
		$k_{2} = 0.61$		$h_{2} = 0.57$
		$p = 1.06$		$p = 1.59$

	CRG	CTG	TBL	PTG	TCL
Mean ref. loss (dB)	−16.78	−24.83	−19.98	−22.97	−18.89
Max. ref. loss (dB)	−14.10	−21.95	−17.74	−18.86	−16.95
Mean pol. eff. (%)	95.53	93.50	98.86	98.85	98.18
Min. pol. eff. (%)	87.71	90.86	97.79	97.28	90.64

CRG	CTG	TBL	PTG	TCL
$d = 0.54$	$d = 0.80$	$d_{1} = 0.64$	$d = 0.64$	$r_{1} = 0.73$
$p = 1.00$	$β = 20.00 °$	$d_{2} = 0.73$	$β = 20.00 °$	$r_{2} = 0.40$
$L = 0.50$		$k_{1} = 0.22$		$h_{1} = 0.68$
		$k_{2} = 0.61$		$h_{2} = 0.57$
		$p = 1.06$		$p = 1.59$

	CRG	CTG	TBL	PTG	TCL
Mean ref. loss (dB)	−16.78	−24.83	−19.98	−22.97	−18.89
Max. ref. loss (dB)	−14.10	−21.95	−17.74	−18.86	−16.95
Mean pol. eff. (%)	95.53	93.50	98.86	98.85	98.18
Min. pol. eff. (%)	87.71	90.86	97.79	97.28	90.64

Abstract

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Equations (2)

Applied Optics