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Dual‐band stacked microstrip patch antennas are a popular choice for wireless and other vehicular communication applications. They are also being considered for use in feed arrays for reflector antennas. In this paper, novel center‐feeding schemes to achieve the desired dual‐band response will be presented. Also, novel side‐feeding schemes for a potential application in arrays have been investigated. L‐band frequencies were chosen to test the concept. For the stacked patch configuration, the primary objective was to get the antenna to resonate at two frequencies—1.575 GHz for the upper patch and 1.228 GHz for the lower patch—with a shared aperture and two independent excitations. Return‐loss, isolation, and pattern measurements for several antenna prototypes are presented. The measured results are compared with the simulation results from an FDTD code developed at UCLA. Extension of the concept for dual‐polarization and array configurations has been explored.
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Kona et al. (2003) studied this question.
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