A Low-Profile Broadband Bandpass Frequency Selective Surface With Two Rapid Band Edges for 5G Near-Field Applications

A low-profile broadband bandpass frequency selective surface (FSS) with two rapid band edges is proposed in this paper for 5G near-field applications. The overall structure consists of three metallic layers, separated by two thin substrates with a thickness of 0.07λ. In addition, some centro-symmetric miniaturized slots are introduced in the middle metallic layer to further improve its stability and reduce its physical dimensions. A corresponding equivalent circuit model (ECM) is also proposed to better analyze the principles of the proposed FSS. Finally, an FSS prototype working at the center frequency of 27.5 GHz with a relative −3 dB bandwidth of 20.5% is fabricated and measured. More than 25 dB shielding effectiveness can be obtained out of the passband for a bandwidth of 1.46 GHz in this experiment. Both 3-D full-wave simulations and ECM results are in good agreement with the experimental results, having a maximum deviation of only 2.257% in the transmission zeros and poles. These results demonstrate that the proposed FSS is a good candidate for 5G near-field EMI shielding.

[1]  N. Behdad,et al.  A New Technique for Design of Low-Profile, Second-Order, Bandpass Frequency Selective Surfaces , 2009, IEEE Transactions on Antennas and Propagation.

[2]  Malathi Kanagasabai,et al.  A Novel Dual-Band Angular Independent FSS With Closely Spaced Frequency Response , 2015, IEEE Microwave and Wireless Components Letters.

[3]  Lin Zheng,et al.  A Tri-Band, Highly Selective, Bandpass FSS Using Cascaded Multilayer Loop Arrays , 2016, IEEE Transactions on Antennas and Propagation.

[4]  Zhongxiang Shen,et al.  Synthesis of Quasi-Elliptic Bandpass Frequency-Selective Surface Using Cascaded Loop Arrays , 2013, IEEE Transactions on Antennas and Propagation.

[5]  M. F. Shafique,et al.  A Miniaturized Flexible Frequency Selective Surface for X-Band Applications , 2016, IEEE Transactions on Electromagnetic Compatibility.

[6]  Ben A. Munk,et al.  Finite Antenna Arrays and FSS: Munk/Finite Antenna Arrays , 2005 .

[7]  N. Behdad,et al.  A Low-Profile Third-Order Bandpass Frequency Selective Surface , 2009, IEEE Transactions on Antennas and Propagation.

[8]  B. A. Munk,et al.  Reflection properties of periodic surfaces of loaded dipoles , 1971 .

[9]  Ben A. Munk,et al.  Finite Antenna Arrays and FSS , 2003 .

[10]  Chun Hsiung Chen,et al.  Suppression of Spurious Emissions From a Spiral Inductor Through the Use of a Frequency-Selective Surface , 2010, IEEE Transactions on Electromagnetic Compatibility.

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

[12]  Gabriel M. Rebeiz,et al.  Antenna-filter-antenna arrays as a class of bandpass frequency-selective surfaces , 2004, IEEE Transactions on Microwave Theory and Techniques.

[13]  E. Pelton,et al.  A streamlined metallic radome , 1974 .

[14]  N. Behdad,et al.  A Third-Order Bandpass Frequency Selective Surface With a Tunable Transmission Null , 2012, IEEE Transactions on Antennas and Propagation.

[15]  Naoki Shinohara,et al.  Frequency-selective surface for microwave power transmission , 1999 .

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

[17]  Xi-Lang Zhou,et al.  A Miniaturized Dual-Band Frequency Selective Surface (FSS) With Closed Loop and Its Complementary Pattern , 2009, IEEE Antennas and Wireless Propagation Letters.

[18]  Raj Mittra,et al.  Application of the micro-genetic algorithm to the design of spatial filters with frequency-selective surfaces embedded in dielectric media , 2002 .

[19]  Jun-Fa Mao,et al.  Accurate Characterization of Shielding Effectiveness of Metallic Enclosures With Thin Wires and Thin Slots , 2009, IEEE Transactions on Electromagnetic Compatibility.

[20]  N. Behdad,et al.  A Generalized Synthesis Procedure for Low-Profile, Frequency Selective Surfaces With Odd-Order Bandpass Responses , 2010, IEEE Transactions on Antennas and Propagation.

[21]  Ladislau Matekovits,et al.  A Single-Layer Frequency-Selective Surface for Ultrawideband Electromagnetic Shielding , 2014, IEEE Transactions on Electromagnetic Compatibility.

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

[23]  S. N. Azemi,et al.  Angularly Stable Frequency Selective Surface With Miniaturized Unit Cell , 2015, IEEE Microwave and Wireless Components Letters.

[25]  Malathi Kanagasabai,et al.  A Low-Profile Paper Substrate-Based Dual-Band FSS for GSM Shielding , 2016, IEEE Transactions on Electromagnetic Compatibility.