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A broadband conformal phased array consisting of 48 linear arrays with four microstrip antennas is presented in this letter. The element is designed by a novel proximity-coupling feeding mechanism with a cavity-backed configuration. A dielectric layer, which is integrated on the surface of the antenna, is designed and fabricated to shield the patches. It plays a role similar to the conformal radome. In addition, the vertical connection between the element and the coax probe is designed, which is a benefit for increasing the space usage. The measured results indicate the bandwidth of the center embedded element is 27.6% with |S11| below -10 dB. Due to its simple single-patch structure, the fabrication errors can be easily controlled.
Antennas and Wireless Propagation Letters, IEEE (Volume:9 )
Date of Publication: 2010