Design and development of multiband coaxial continuous transverse stub (CTS) antenna arrays

Continuous transverse stub (CTS) technology has been adapted to use with coaxial lines to produce effective microwave antenna structures that radiate omnidirectionally, with high efficiency, low reflection, and useful radiation patterns. In this paper, we describe the design, construction, and testing of a new type of antenna array, that is, a six-element multiband (4.2 and 19.4 GHz) CTS antenna array. The design of the CTS array was optimized through simulation using finite-difference time-domain and then built and tested using both S-parameters and radiation pattern measurements. Simulation results agreed very well with measured data. These simple and low cost coaxial CTS structures could be adapted for base station applications in wireless communication, for satellite communication systems, and Identification Friend-or-Foe systems for the military.

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