首页|A Miniaturized Dual-Polarized Antenna With High Isolation and Low Cross Polarization
A Miniaturized Dual-Polarized Antenna With High Isolation and Low Cross Polarization
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NETL
NSTL
IEEE
A miniaturized dual-polarized patch antenna with high isolation and low cross polarization is presented in this letter. The antenna is printed on two substrate layers with three metallic layers. The square patch on the top is fed orthogonality by two probes for dual-polarized radiation with TM10 and TM01 modes. A thin metallic strip is cut off from every radiation edge and loaded by a via row. The electromagnetic waves of the two modes are radiated from the gaps between metallic strips and the square patch and become more concentrated and symmetric, which reduces the cross-polarization and improves the port isolation. By introducing the interdigital structure in the radiation slots, the patch is miniaturized with an electrical size of 0.23$\lambda _{0}$ × 0.23$\lambda _{0}$ × 0.07$\lambda _{0}$ ($\lambda _{0}$ is the free-space wavelength at center frequency), which is about 71% area of a conventional square patch antenna. The measured results show that the isolation is greater than 46 dB, and the cross-polarization is less than −42 dB at the operating frequency of 5.8 GHz. This antenna also has the function of harmonic suppression. The good advantages and miniaturized size make the proposed antenna a preferable choice for various wireless communication systems.
NETL
NSTL
IEEE
