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.
Equidispersive Dual-Mode Long Slot Arrays / Del Mastro M.; Lenzini S.; Sauleau R.; Ettorre M.. - In: IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS. - ISSN 1536-1225. - ELETTRONICO. - 19:12(2020), pp. 9200589.2127-9200589.2131. [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.
