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  • A Low RCS Wideband Antenna ...
    Wen, Youquan; Wong, Sai-Wai; Lin, Huawei; Ji, Chunlin; Liu, Ruopeng; He, Yejun

    IEEE antennas and wireless propagation letters, 2024
    Journal Article

    A wideband integrated antenna is proposed with realization of radiation and dual polarized absorption in same frequency band. The novelty of the proposed integrated structure lies in the share-aperture of frequency-selective absorber and magnetoelectric dipole, which remain mutually independent and orthogonal operating characteristics. In the share-structure, each array element can be selectively connected to an excitation port or a resistor loading (50 Ω) to re-use the antenna port impedance for receiving and absorbing co-polarized waves. While the cross-polarized waves are reflected by antenna ground and absorbed by mounted resistors on the symmetric patches at the top layer of the antenna array. Consequently, the proposed antenna exhibits both wideband radiation and dual polarized absorption simultaneously with low profile (0.22λ0). Finally, a prototype 2×2 antenna array is fabricated and measured, demonstrating an impedance bandwidth of 92.7% for |S11| < −10 dB from 2.2 to 6 GHz. Moreover, the proposed antenna has 10 dB RCS reduction bandwidth of 100% (2-6 GHz) for x- and y-polarized normally incident waves.