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Radiation impedance of a dipole printed on periodic dielectric slabs protruding over a ground plane in an infinite phased array

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2 Author(s)
Ruey-Shi Chu ; Hughes Aircraft Co., Fullerton, CA USA ; Kuan-Min Lee

The radiation impedance of a dipole printed on periodic dielectric slabs standing over a ground plane in an infinite phased array is calculated. The calculation is made by means of modal expansions in terms of longitudinal section electric (LSE) and longitudinal section magnetic (LSM) modes. Derivations of these hybrid space modes and development of the modal expansions are presented first. The impedance of the dipole element is then calculated by a method based on the complex power relations with the aid of Poynting's theorem. The results calculated by the present theory in the limiting case of no dielectric slab loading have been compared with the results calculated by the method of ordinary plane wave expansions. A comparison is also made between results calculated by the theory and the experimental data obtained from waveguide simulators or test array. These results are shown to be in good agreement. An outline of steps to formulate the solution of the current distribution on dipole is also given.

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Antennas and Propagation, IEEE Transactions on  (Volume:35 ,  Issue: 1 )