An 8×4 Continuous Transverse Stub Array fed by Coaxial Ports
Résumé
Continuous transverse stub arrays are wideband, wide-scanning antennas consisting of an arrangement of long slots or parallel-plate waveguide apertures radiating in free space. A line source is generally required to feed these arrays. Here, we show that such a line source can be created over the radiating aperture using a two-dimensional (2-D) arrangement of coaxial probe transitions. The coaxial transitions are directly integrated into the parallel-plate waveguides feeding the slots. Such a solution avoids using quasi-optical systems or bulky corporate networks to feed the array. The proposed 2-D feeding scheme also allows steering the main beam of the array. This is an additional benefit with respect to previous designs for which scanning was limited to a single plane. An array of 8 × 4 elements validates the concept at 5.8 GHz. Measurements show that the array exhibits a field of view of ±30° in elevation over the 5.4-6.2 GHz band, with an active reflection coefficient for the central elements better than -10 dB.
Domaines
Electromagnétisme
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Zhou et al-2019-An 8×4 Continuous Transverse Stub Array fed by Coaxial Ports.pdf (5.02 Mo)
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