A Compact Dual-Polarized Frequency-Scanning Continuous Transverse Stub Antenna Array

A dual-polarized (DP) frequency-scanning continuous transverse stub (CTS) planar array fed by two orthogonally placed 1×8 power dividers is proposed in this paper. The 1×8 rectangular waveguide power divider, being realized by connecting four 1×2 power dividers in series, are designed to obtain a uniform and stable line source for feeding the CTS antenna array. The array can steer to different direction with the frequency varying. A 6-element CTS array is simulated to validate the design. The simulation results show that the proposed antenna array scans continuously in H-plane from -22° to 9° within the frequency range of 11.6-12.8 GHz, and the isolation between the two feeding ports is higher than 20 dB. At the center frequency of 11.9 GHz, the gain at the broadside is 20.5 dBi. The CTS array has compact size and low-profile.