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.
Del Mastro M., Lenzini S., Sauleau R., Ettorre M. (2020). Equidispersive Dual-Mode Long Slot Arrays. IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, 19(12), 2127-2131 [10.1109/LAWP.2020.3024618].
Equidispersive Dual-Mode Long Slot Arrays
Lenzini S.;
2020
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.