Illustration showing the basic features of an elliptical substrate lens (shown in shadowed area). Let S and be two foci on major radius of the ellipse of eccentricity of e, P be an arbitrary point on the ellipse, and MN be the normal to the ellipse at P. A ray of light coming from source S is refracted at point P of the elliptical surface, and if there exists an image of S at infinity, the outgoing ray PQ is parallel to the major axis .
Simulated dual dipole antenna patterns at 170 GHz.
Photograph of a high frequency dual dipole antenna taken under a microscope.
Measured [(a) and (b)] E-plane and [(c) and (d)] H-plane antenna patterns, 117–234 GHz of the antenna in Fig. 3.
Calibrated (dark squares) and uncalibrated (light squares) antenna sensitivity as a function of frequency. Multiplier efficiency (triangles) computed from VDI datasheets.
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