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Perforated dielectric lens
Author(s) -
Lee C. S.,
Lee S. W.,
Davis R.,
Tsui J.
Publication year - 1992
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.4650050214
Subject(s) - lens (geology) , dielectric , materials science , optics , through the lens metering , engineering physics , electrical engineering , optoelectronics , engineering , physics
The dielectric lens for an ideal focusing effect requires a continuously varying dielectric constant. In this article, the varying dielectric constant is simulated by drilling holes in the lens. The gain improves significantly (˜3 dB) by placing holes in the lens when the lens diameter is much larger than the wavelength (>10 λ) but the hole size is small (<0.25 λ).