Siw 2d Planar Array With Four Cross Slots Radiator and Tuning Vias

Abstract

Abstract-A Substrate Integrated Waveguide (SIW) planar array is presented using a right handed circularly polarized (RHCP) element with four crossed tilted radiating slots. In addition, a pair of metallic tuning vias is included to really improve the reflection of longest slots. A corporate feeding network over SIW has been designed for distributing the input signal to 128 radiating elements, divided into 8 progressive wave linear arrays of 16 elements each. The designed planar array has been manufactured and measured to verify the antenna performance. 25.5 dB gain, 2.33 dB axial ratio, as well as 85% radiation efficiency values have been experimentally achieved at 17 GHz. A 3% usable bandwidth (16.75-17.25 GHz) is obtained due to the typical frequency main beam tilt dispersion in the elevation plane of the progressive wave arrays.

Design and characterisation model for a linearly polarised patch array fed by serial rectangular waveguide network

“…Main beam tilt angles at 11 and 12 GHz are −3.5°and 3.5°, respectively. Therefore the usable bandwidth is reduced to 6% (11.15 -11.85 GHz) under ±2.5°beamtilt criteria [18]. The obtained 6% usable bandwidth is wider in comparison with [18] (3%) and [19] (2.5%).…”

“…Therefore the usable bandwidth is reduced to 6% (11.15 -11.85 GHz) under ±2.5°beamtilt criteria [18]. The obtained 6% usable bandwidth is wider in comparison with [18] (3%) and [19] (2.5%). This improvement is because of the lower effective dielectric constant (ε reff = 1.177) in the RWFN which leads to wider bandwidth under the same main beam tilt criteria.…”