Tunable Frequency Selective Surface Based on a Sliding 3D-Printed Inserted Dielectric

A novel mechanically tunable frequency selective surface (FSS) based on a sliding 3D-printed inserted dielectric is presented in this paper. This paper first introduces the working mechanism of the tunable FSS, which indicates that the variable capacitance is the key to tunability. Based on this, we design an all-metal bandpass FSS with a certain thickness and a matching cross-shaped inserted dielectric. By changing the insertion depth of the dielectric, the resonance frequency can be adjusted. To optimize the performance, an improved structure based on a hollow support and a tripole slot is proposed. A tunable range from 3.24 to 5.52 GHz (53%) and good angular stability is obtained in the simulation. To verify this idea, we fabricate a cross slot prototype by 3D printing and mechanical engraving. Measured results show that this prototype has a continuous tunable range of 3.61 to 5.89 GHz (34.4%).

[1]  Telmo R. Fernandes,et al.  3-D Mechanically Tunable Square Slot FSS , 2017, IEEE Transactions on Antennas and Propagation.

[2]  Craig Armiento,et al.  All-Printed Flexible Microwave Varactors and Phase Shifters Based on a Tunable BST/Polymer , 2017, IEEE Transactions on Microwave Theory and Techniques.

[3]  Wenchao Chen,et al.  Tunable THz Multiband Frequency-Selective Surface Based on Hybrid Metal–Graphene Structures , 2017, IEEE Transactions on Nanotechnology.

[4]  K. Ghorbani,et al.  A Reconfigurable FSS Using a Spring Resonator Element , 2013, IEEE Antennas and Wireless Propagation Letters.

[5]  Cyrus Shafai,et al.  X-Band Tunable Frequency Selective Surface Using MEMS Capacitive Loads , 2015, IEEE Transactions on Antennas and Propagation.

[6]  E. Rothwell,et al.  Origami Tunable Frequency Selective Surfaces , 2012, IEEE Antennas and Wireless Propagation Letters.

[7]  Jiming Song,et al.  Active Frequency Selective Surface With Wide Reconfigurable Passband , 2019, IEEE Access.

[8]  K. Srivastava,et al.  Broadband Polarization-Insensitive Tunable Frequency Selective Surface for Wideband Shielding , 2018, IEEE Transactions on Electromagnetic Compatibility.

[9]  A. G. Neto,et al.  Design of reconfigurable frequency-selective surfaces including the PIN diode threshold region , 2018 .

[10]  Bao Jun Lei,et al.  A Wideband, Pressure-Driven, Liquid-Tunable Frequency Selective Surface , 2011, IEEE Microwave and Wireless Components Letters.

[11]  R. Jakoby,et al.  Beam Steering Transmitarray Using Tunable Frequency Selective Surface With Integrated Ferroelectric Varactors , 2012, IEEE Transactions on Antennas and Propagation.

[12]  N. Behdad,et al.  Fluidically Tunable Frequency Selective/Phase Shifting Surfaces for High-Power Microwave Applications , 2012, IEEE Transactions on Antennas and Propagation.

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

[14]  Derek Abbott,et al.  Varactor-Tunable Second-Order Bandpass Frequency-Selective Surface With Embedded Bias Network , 2016, IEEE Transactions on Antennas and Propagation.

[15]  Q. Feng,et al.  Tunable 3-D Bandpass Frequency-Selective Structure With Wide Tuning Range , 2015, IEEE Transactions on Antennas and Propagation.

[16]  R. Cahill,et al.  Liquid Crystal Tunable mm Wave Frequency Selective Surface , 2007, IEEE Microwave and Wireless Components Letters.

[17]  Sungjoon Lim,et al.  Novel Multifunctional Reconfigurable Active Frequency Selective Surface , 2019, IEEE Transactions on Antennas and Propagation.

[18]  A. E. Martynyuk,et al.  Active frequency-selective surfaces based on loaded ring slot resonators , 2005 .

[19]  K. L. Ford,et al.  Switchable Frequency Selective Surface for Reconfigurable Electromagnetic Architecture of Buildings , 2010, IEEE Transactions on Antennas and Propagation.