Three-dimensional Phased Array Research Articles

Micromachined H-plane horn antenna manufactured using thick SU-8 photoresist

A micromachined H-plane horn antenna designed at 63 GHz is presented. The horn is integrated with an air filled coaxial line to ridge waveguide transition with the ridge waveguide feeding the horn. The antenna is constructed by bonding five layers of gold coated SU-8 photoresist, each 200 m-thick. The performance has been validated experimentally using on-wafer probe measurements. A good match is achieved with low return loss obtained at the designed operating frequency. This proposed design is to be used in three-dimensional phased array beamformers.

Use of the field-iteration method in studying the three-dimensional phased array for electromagnetic hyperthermia

The field-iteration method (FIM) is used for simulation of the three-dimensional (3-D) phased array for deep regional hyperthermia at a frequency of 200 MHz. The iterative equation involving the electric field integral equation is derived using the dyadic Green's function with singularities at source paints. The electric field and specific absorption rate distributions in a circular cylindrical model of muscle-like medium and in a model of computerized tomography scans of a liver cancer patient are calculated, respectively, using different amplitudes and/or phases and/or positions of individual applicators of the H-horn phased array. The obtained numerical results compared with the moment method results are analyzed to assess the accuracy of the field-iteration method and also to predict the advantages of the 3-D phased array hyperthermia system.