Abstract
Continuous Transverse Stub (CTS) arrays are generally fed using a line source. In this paper, we use a two-dimensional arrangement of planar striplines to create such a line source. The whole feeding network is realized in planar form using standard PCB manufacturing process. The planar network is then integrated into the parallel-plate waveguides under the radiating slots. The proposed solution avoids using bulky corporate networks or quasi-optical systems to feed the CTS. Unlike classical CTS configurations, where scanning is allowed just in a single direction, in the proposed feeding scheme the beam can be steered in any direction when the appropriate amplitude and phase are provided to the inputs. An array of 4×8 has been designed to operate in the Ka transmitting Satcom band. The simulated active reflection coefficient of the central element is less than −10 dB over a 12.7% band for scanning up to 30° in both E and Diagonal plane, while is 8% in H-plane.
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