Equidispersive Dual-Mode Long Slot Arrays
Résumé
In this letter, we propose an analytic study for engineering equidispersive (ED) orthomode parallel-plate waveguide (PPW) structures. As difference with classical PPWs having perfectly conducting walls, the metallic plates are here replaced by arbitrary surface impedance boundaries. Closed-form expressions are provided to engineer their dispersion and obtain purely ED dual-mode propagation exploiting transverse electric and magnetic modes. This new class of PPWs is finally used as radiating open-ended stubs, arranged in a periodic environment to attain circular polarization. The corresponding axial ratio is calculated to be below 3 dB over a 22.3% fractional bandwidth.
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DelMastro et al-2020-Equi-Dispersive Dual-Mode Long Slot Arrays.pdf (3 Mo)
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