A Dual-Wideband Dual-Polarized Aperture-Shared Patch Antenna With High Isolation

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Abstract
A dual-wideband dual-polarized aperture-shared patch antenna with high isolation is proposed, which consists of an S-band circularly polarized (CP) antenna and an X-band linearly polarized (LP) antenna. The S-band antenna adopts the stacked patches, where the upper parasitic patch is introduced for increasing gain and bandwidth and also works as a ground plane for the X-band excited patch. The X-band feed coaxial line perforates the center of S-band excited patch and parasitic patch, so that the co-shared aperture antennas are tightly integrated and have a high isolation. The simulated and measured results are matched well, and show that the proposed antenna obtains 10-dB impedance bandwidths of 19.3% and 22%, peak gains of 10.8 dBi and 8.5 dBic, for X-band and S-band, respectively. Meanwhile, the 3-dB axial ratio (AR) bandwidth of S-band is 19.2% and the port isolation between S- and X- bands is higher than 32 dB.
Funding Information
  • National Natural Science Foundation of China (61571298, 61671416, 61571289, 61471240, 61701303, 51777168)
  • Natural Science Foundation of Shanghai Municipality (17ZR1414300)
  • Shanghai Pujiang Program (17PJ1404100)

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