| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 9, 2014
|
|
|---|---|---|
| Article Number | 14007 | |
| Number of page(s) | 5 | |
| DOI | https://doi.org/10.2971/jeos.2014.14007 | |
| Published online | 05 February 2014 | |
Regular papers
Double-sided split-step MM-wave Fresnel lenses: design, fabrication and focal field measurements
1
IRE NASU, Kharkiv, Ukraine
Gazi University, Ankara, Turkey
3
Engitek Ltd., Ankara, Turkey
4
NUI Maynooth, Maynooth, Ireland
5
Bilkent University, Ankara, Turkey
* v.yurchenko@nuim.ie
** mehmet.ciydem@engitek.com.tr
Received:
16
October
2013
Accepted:
21
January
2014
Design, fabrication and focal field measurements of W-band Fresnel lenses to produce well-shaped Gaussian beams in the focal domain are presented. Two lenses, one of Teflon and another of Polyamide, have been compared in their performance with a double-sided Fresnel lens of different design, with full height of Fresnel steps. Experiments show that a good focusing ability of all the lenses is achieved. They produce the target beam according to the design. Yet, the lenses of split-step design are thinner, have lower insertion losses, and a greater focal depth as compared to more conventional Fresnel lenses.
Key words: Fresnel lenses / focal fields / Gaussian beam / MM-wave / THz applications
© The Author(s) 2014. All rights reserved.
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