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Microstrip-fed crossed-slot array antenna

Microstrip-fed crossed-slot array antenna

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Published

A microstrip-fed crossed-slot array antenna having a circular polarisation is developed. First, a single crossed-slot antenna, that can radiate a circularly polarised wave in the broadside direction, is designed and its coupling level to the microstrip line is analysed. Based on this result, an eight-element crossed-slot array is designed and its characteristics are experimentally investigated at 12 GHz band. The return loss of −17 dB is obtained at the design frequency of 11.85 GHz, and the axial ratio of less than 3 dB is achieved over the fractional bandwidth of 5%.

Inspec keywords: slot antenna arrays; microstrip antenna arrays; electromagnetic wave polarisation; electromagnetic coupling; microstrip lines

Other keywords: eight-element crossed-slot array; design frequency; microstrip-fed crossed-slot array antenna radiation; 11.85 GHz; -17 dB; broadside direction; 12 GHz; microstrip line; circular polarisation; fractional bandwidth; coupling level; axial ratio

Subjects: Waveguides and microwave transmission lines; Radiowave propagation; Antenna arrays

References

    1. 1)
      • Hongyu, L., Zhenghe, F., Qiji, Y.: `Analysis of an offset cross slot in the broadwall of a rectangular waveguide using the Galerkin method', IEEE Antennas Propagation Society Symp. Dig., 1998, Atlanta, GA, USA, 3, p. 1702–1705.
    2. 2)
    3. 3)
      • Hirano, T., Hirokawa, J., Ando, M.: `Design of a waveguide crossed-slot array with matching elements using the method of moments with numerical-eigenmode basis functions', IEEE Antennas Propagation Society Symp., 2003, Columbus, OH, USA, AP Session 121.5.
    4. 4)
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