Publications by William T. Joines.

Papers Published

  1. Y. Chen and W. T. Joines and Z. T. Xie and G. N. Shi and Q. H. Liu and L. Carin, Double-sided exponentially tapered GPR antenna and its transmission line feed structure, Ieee Transactions On Antennas And Propagation, vol. 54 no. 9 (September, 2006), pp. 2615 -- 2623 .
    (last updated on 2008/10/16)

    Abstract:
    A double-sided broadband antenna for applications including ground-penetrating radar for detecting buried target is described. When compared with traditional coplanar-strip antennas, a better performance is achieved with a more practical design for construction. The steps in the design procedure are demonstrated herein. In addition, using incremental segments of current elements, a distributed dipole array model is derived and presented for determining S-11 in the time domain and for determining the radiation pattern of this antenna. By comparing measured results and HFSS simulations, our straightforward dipole array model of the more complicated antenna structure is justified by the accuracy of the results obtained. Finally, an experimental example is presented to show that this antenna in a GPR system application is effective in detecting even small plastic targets.