Leaky modes at backward endfire on periodic printed structures

[1] In this work, the transition at backward endfire between bound (nonleaky) and leaky modes on one-dimensional periodic structures printed on a grounded dielectric substrate is examined. This mode evolution has been characterized for a class of structures with a finite-width cross section. Such structures support leakage into surface waves as well as into space due to the presence of the substrate. The solutions in this transition region are calculated using an accurate full-wave moment-method approach that allows for the determination of both physical and nonphysical solutions, both of which play an important role in the transition region.

[1]  David R. Jackson,et al.  Evolution of leaky modes on printed-circuit lines , 2002 .

[2]  Vincent Fusco,et al.  Electromagnetic Metamaterials: Physics and Engineering Explorations (Engheta, N. and Ziolkowski, R.W.; 2006) [Book Review] , 2007, IEEE Antennas and Propagation Magazine.

[3]  David R. Jackson,et al.  Existence of a leaky dominant mode on microstrip line with an isotropic substrate: theory and measurement , 1993, 1993 IEEE MTT-S International Microwave Symposium Digest.

[4]  G. Valerio,et al.  Full-wave analysis of periodic microstrip lines excited by an aperiodic delta-gap source , 2007, 2007 IEEE/MTT-S International Microwave Symposium.

[5]  G. Lovat,et al.  Approximate analytical evaluation of the continuous spectrum in a substrate-superstrate dielectric waveguide , 2002, 2002 IEEE MTT-S International Microwave Symposium Digest (Cat. No.02CH37278).

[6]  R. Coccioli,et al.  Planar PBG Structures: Basic Properties and Applications , 2000 .

[7]  A. A. Oliner,et al.  Guided complex waves. Part 2: Relation to radiation patterns , 1963 .

[8]  G. Lovat,et al.  Effects of leaky-wave propagation in metamaterial grounded slabs excited by a dipole source , 2005, IEEE Transactions on Microwave Theory and Techniques.

[9]  M. Guglielmi,et al.  The nature of the spectral gap for leaky waves on a periodic strip grating structure , 1997, 1997 IEEE MTT-S International Microwave Symposium Digest.

[10]  Paolo Baccarelli,et al.  Full‐wave analysis of printed leaky‐wave phased arrays , 2002 .

[11]  Tatsuo Itoh,et al.  Electromagnetic metamaterials : transmission line theory and microwave applications : the engineering approach , 2005 .

[12]  F. Frezza,et al.  The role of complex waves of proper type in radiative effects of nonreciprocal structures , 1997, 1997 IEEE MTT-S International Microwave Symposium Digest.

[13]  Fabrizio Frezza,et al.  The transition region between bound-wave and leaky-wave ranges for a partially dielectric-loaded open guiding structure , 1990 .

[14]  David R. Jackson,et al.  The theory of surface-wave and space-wave leaky-mode excitation on microstrip lines , 1999 .

[15]  K. Balmain,et al.  Negative Refraction Metamaterials: Fundamental Principles and Applications , 2005 .

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

[17]  A. Oliner,et al.  Microstrip leaky wave strip antennas , 1986, 1986 Antennas and Propagation Society International Symposium.

[18]  Arthur A. Oliner,et al.  Leakage from higher modes on microstrip line with application to antennas , 1987 .

[19]  D. Jackson,et al.  A New Brillouin Dispersion Diagram for 1-D Periodic Printed Structures , 2007, IEEE transactions on microwave theory and techniques.

[20]  A. A. Oliner,et al.  The Nature of the Leakage from Higher Modes on Microstrip Line , 1986, 1986 IEEE MTT-S International Microwave Symposium Digest.

[21]  D. Jackson,et al.  Leaky‐Wave Antennas , 2008 .

[22]  Mikio Tsuji,et al.  The nature of the spectral gap between bound and leaky solutions when dielectric loss is present in printed-circuit lines , 1993 .

[23]  P. Burghignoli,et al.  Low-frequency dispersion features of a new complex mode for a periodic strip grating on a grounded dielectric slab , 2001, 2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157).

[24]  G. Lovat,et al.  Modal properties of surface and leaky waves propagating at arbitrary angles along a metal strip grating on a grounded slab , 2005, IEEE Transactions on Antennas and Propagation.

[25]  A. Oliner,et al.  "Mode-coupling" regions in the dispersion curves of modulated slow wave antennas , 1963 .

[26]  D. P. Nyquist,et al.  Identification of propagation regimes on integrated microstrip transmission lines , 1993 .

[27]  P. Baccarelli,et al.  A full-wave numerical approach for modal analysis of 1-D periodic microstrip structures , 2006, IEEE Transactions on Microwave Theory and Techniques.