Design and Performance of a Double-Layer Miniaturized-Element Frequency Selective Surface

In this letter, a novel bandpass frequency selective surface (FSS) is proposed. Unlike the traditional FSSs, our building block makes use of a periodic cell with much smaller size than the resonant wavelength. The proposed FSS is composed by two layers of metallic unit cells printed on the substrate. The coupling between parallel patches in different metallic layers can produce the significant distributed capacitance of the FSS; as a result, the size of the FSS unit cell can be decreased to λ/16. Our simulated result shows that the transmission characteristic of the miniaturized FSS is very stable since the relative change rate of resonant frequency is less than 2% with respect to different incident angles from 0° to 45° . The measured results show good agreements with the simulated ones. In addition, our result also implies that the structure has wide application space, based on analysis of three other variations on the periodic structure.

[1]  Chao-Chun Chen,et al.  Scattering by a two-dimensional periodic array of conducting plates , 1970 .

[2]  R. Mittra,et al.  Techniques for analyzing frequency selective surfaces-a review , 1988, Proc. IEEE.

[3]  S. W. Lee,et al.  Tri-band frequency selective surface with circular ring elements , 1991, Antennas and Propagation Society Symposium 1991 Digest.

[4]  Edward A. Parker,et al.  Convoluted frequency-selective array elements derived from linear and crossed dipoles , 1993 .

[5]  Ben A. Munk,et al.  Frequency Selective Surfaces: Theory and Design , 2000 .

[6]  E. Parker,et al.  Active frequency selective surfaces with ferroelectric substrates , 2001 .

[7]  K. Sarabandi,et al.  Antenna miniaturization and bandwidth enhancement using a reactive impedance substrate , 2004, IEEE Transactions on Antennas and Propagation.

[8]  Wei Hong,et al.  Theory and experiment of novel frequency selective surface based on substrate integrated waveguide technology , 2005 .

[9]  K. Sarabandi,et al.  A Frequency Selective Surface With Miniaturized Elements , 2007, IEEE Transactions on Antennas and Propagation.

[10]  K. Sarabandi,et al.  Single-Layer High-Order Miniaturized-Element Frequency-Selective Surfaces , 2008, IEEE Transactions on Microwave Theory and Techniques.

[11]  Shuxi Gong,et al.  A novel miniaturized frequency selective surface with excellent center frequency stability , 2009 .

[12]  Wen Wu,et al.  Low‐frequency miniaturized dual‐band frequency selective surfaces with close band spacing , 2009 .

[13]  K. L. Ford,et al.  Design Methodology for a Miniaturized Frequency Selective Surface Using Lumped Reactive Components , 2009, IEEE Transactions on Antennas and Propagation.