Dielectric constant and loss tangent in LiNbO[sub 3] crystals from 90 to 147 GHz

Lee, Mark
August 2001
Applied Physics Letters;8/27/2001, Vol. 79 Issue 9, p1342
Academic Journal
The complex dielectric constant ε(ω) of poled LiNbO[sub 3] crystals has been measured from 90 to 147 GHz using a reflectometer bridge. Electric field polarizations in both the ordinary and extraordinary axes were studied. The real part of ε(ω) differs only slightly from its value near 10 GHz, while the imaginary part is significantly larger than reported at lower frequencies. The data are used to model the dissipative losses of a gold co-planar waveguide on LiNbO[sub 3]. © 2001 American Institute of Physics.


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