Integrated Imaging Lens Antenna with Broadband Feeds

The paper explores the use of a recently introduced printed broadband antenna based on crossed exponential slot configuration for multiple-feed excitation of an integrated lens antenna. The new patch is compact, it presents very good linear polarisation and it is especially adequate for integrated lens antenna feeding at millimetre waves and sub-millimetre waves, even allowing for convenient integration of a mixer at the back-face of the antenna substrate. The concept is validated with experimental results using an elliptical MACOR lens fed by six of these new printed elements. The lens performance is evaluated using the classical hybrid Geometrical Optics/Physical Optics approach. Comparison of simulations with experimental results from a fabricated prototype shows good agreement.