Hang Wang

Nanyang Technological University, Tumasik, Singapore

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Publications (2)0 Total impact

  • Zhongxiang Shen, Hang Wang
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    ABSTRACT: This paper presents an analytical study for the optimum bandwidth that a very thin absorbing screen can achieve. Our derived results are valid for an absorbing screen of arbitrary thickness, though very thin. Due to its small thickness, the single-layer screen must be capacitive for impedance matching. It is shown that a series capacitive circuit is a much better choice than the shunt capacitive one, as far as the maximum achievable bandwidth is concerned. It is also interesting to note that under certain conditions a series capacitive circuit can theoretically provide an infinite absolute bandwidth for a thin absorbing screen.
    Antennas and Propagation Society International Symposium, 2007 IEEE; 07/2007
  • [Show abstract] [Hide abstract]
    ABSTRACT: A novel radar absorbing material is designed by combining a high impedance surface and a transitional structure. The high impedance surface consists of a two-dimensional periodic array of unit cells that are implemented using a left-handed transmission line printed on a dielectric substrate with lumped elements. A transition between free space and the vertically placed microstrip line is designed using a horizontal strip to ensure that the incident electromagnetic energy can be strongly coupled to the guided wave in the microstrip line. A chip resistor is added in the printed microstrip line of each unit cell to absorb the electromagnetic energy. Both simulated and measured radar cross section results of a conducting plate with 4 times 8 cells show that the absorber has a reduction of 10 dB over a bandwidth 50% at the center frequency of 2 GHz. The thickness of the designed absorber is only 0.13 free-space wavelength at the center frequency. Simulation results of another designed absorber show that it has a wider bandwidth about 92% using a double-substrate structure.
    Microwave Symposium, 2007. IEEE/MTT-S International; 07/2007

Publication Stats

5 Citations

Institutions

  • 2007
    • Nanyang Technological University
      Tumasik, Singapore