Dual-Frequencies Diffractive Lenses at Millimeter Wavelengths |
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Authors: | W B Dou and Z L Sun |
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Institution: | (1) State Key Lab of Millimeter Waves, Nanjing, 210096, People's Republic of China |
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Abstract: | Diffractive lens have many advantages over refractive lens at millimeter waves band, such as thin, light and low dielectric loss and so on. However, diffractive lens have chromatic aberration, that is, focusing performance of diffractive lens is frequency dependent. In this report, a dual frequencies diffractive lens is developed, which can work at 8mm band and 3mm band, based on the harmonic diffractive lens techniques. Experiments show it has almost same focusing performance at 8mm band and 3mm band. |
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Keywords: | Millimeter waves antenna harmonic diffractive lens |
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