Singly and Dual Polarized Convoluted Frequency Selective Structures

Convoluting the elements of frequency selective surfaces produces resonating structures with very small unit cell dimensions. This feature is attractive when the FSS is to be used at low frequencies, mounted on a curved surface, or when placed in the proximity of compact radiators. The characteristics of single and dual polarized convoluted FSS are analyzed and measured. The development of novel convoluted elements derived from the square loop slot is traced and their performance is examined. A novel technique of interweaving convoluted loops allows for further cell size reduction, while increasing the passband width, introducing flexibility in wideband FSS design, particularly for tailoring the electromagnetic architecture of buildings, and mobile communications in the built environment. Simulated transmission responses of the convoluted structures are in good agreement with the measurements.

[1]  Edward A. Parker,et al.  CONVOLUTED DIPOLE ARRAY ELEMENTS , 1991 .

[2]  A. Lindenmayer.  Mathematical models for cellular interactions in development. I. Filaments with one-sided inputs. , 1968, Journal of theoretical biology.

[3]  R. Luebbers,et al.  Some effects of dielectric loading on periodic slot arrays , 1978 .

[4]  John C. Batchelor,et al.  Minimal size FSS for long wavelength operation , 2008 .

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

[6]  D. Werner,et al.  The electromagnetic fields of elliptical torus knots , 2001 .

[7]  John C. Batchelor,et al.  Reduced sized cells for high impedance (HIP) ground planes , 2003 .

[8]  Y. Rahmat-Samii,et al.  Fractal FSS: a novel dual-band frequency selective surface , 2000 .

[9]  Agostino Monorchio,et al.  Small periodicity FSS screens with enhanced bandwidth performance , 2006 .

[10]  J.,et al.  Dual band FSS with fractal elements , 2004 .

[11]  John C. Batchelor,et al.  Interwoven convoluted element frequency selective surfaces with wide bandwidths , 2006 .

[12]  Edward A. Parker,et al.  Loss-bandwidth product for frequency selective surfaces , 1992 .

[13]  P.L. Werner,et al.  The design of miniature three-element stochastic Yagi-Uda arrays using particle swarm optimization , 2006, IEEE Antennas and Wireless Propagation Letters.

[14]  S. Best.  A comparison of the performance properties of the Hilbert curve fractal and meander line monopole antennas , 2002 .

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

[16]  K. A. Jose,et al.  Hilbert curve fractal antenna: A small resonant antenna for VHF/UHF applications , 2001 .

[17]  N. Engheta,et al.  High impedance metamaterial surfaces using Hilbert-curve inclusions , 2004, IEEE Microwave and Wireless Components Letters.

[18]  Yahya Rahmat-Samii,et al.  Dual band FSS with fractal elements , 1999 .

[19]  E. Parker,et al.  Application of FSS Structures to Selectively Control the Propagation of signals into and out of buildings – Executive Summary , 2004 .

[20]  P.L. Werner,et al.  Fractile arrays: a new class of tiled arrays with fractal boundaries , 2004, IEEE Transactions on Antennas and Propagation.

[21]  P. L. Werner,et al.  The Peano-Gosper fractal array , 2003 .

[22]  D. Werner,et al.  A design approach for dual-polarized multiband frequency selective surfaces using fractal elements , 2000, IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C.

[23]  R. Langley,et al.  Double-square frequency-selective surfaces and their equivalent circuit , 1983 .

[24]  M.J. Neve,et al.  Performance analysis for indoor wireless systems employing directional antennas in the presence of external interference , 2005, 2005 IEEE Antennas and Propagation Society International Symposium.

[25]  H. Sagan.  Space-filling curves , 1994 .

[26]  John C. Batchelor,et al.  Reduced sized cells for electromagnetic bandgap structures , 2003 .

[27]  A. Hoorfar,et al.  Bandwidth, cross-polarization, and feed-point characteristics of matched Hilbert antennas , 2003, IEEE Antennas and Wireless Propagation Letters.

[28]  Douglas H. Werner,et al.  Design of dual-polarised multiband frequency selective surfaces using fractal elements , 2000 .

[29]  Edward A. Parker,et al.  Convoluted array elements and reduced size unit cells for frequency-selective surfaces , 1991 .

[30]  John C. Batchelor,et al.  Convoluted double square: single layer FSS with close band spacings , 2000 .

[31]  D. Sievenpiper,et al.  High-impedance electromagnetic surfaces with a forbidden frequency band , 1999 .