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Power deposition and focusing in a lossy cylinder by a concentric phased array
Author(s) -
Lumori Mikaya L. D.,
Wait James R.,
Cetas Thomas C.
Publication year - 1989
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs024i004p00433
Subject(s) - aperture (computer memory) , optics , phased array , radius , french horn , imaging phantom , physics , reflector (photography) , cylinder , acoustics , materials science , antenna (radio) , electrical engineering , computer science , engineering , geometry , mathematics , light source , computer security
We present an analysis of phased array applicators for heating of torso, limbs, and neck. A homogeneous cylindrical model is adopted for the calculations. Four‐, eight‐, and 16‐horn apertures are considered. Focusing of power is demonstrated for an operation frequency of 915 MHz in a cylindrical phantom of radius 5.2 cm, with a conductivity of 1.28 S/m and a relative permittivity of 51. Experimental verification is shown for the case with four‐horn applicators. We thus demonstrate that by controlling the relative phases and amplitudes of the aperture sources, it is possible to focus electromagnetic power at desired locations such as tumors.