Journal ArticleDOI
A uniplanar compact photonic-bandgap (UC-PBG) structure and its applications for microwave circuit
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TLDR
In this article, the photonic bandgap (PBG) structure for microwave integrated circuits is presented, which is a two-dimensional square lattice with each element consisting of a metal pad and four connecting branches.Abstract:
This paper presents a novel photonic bandgap (PBG) structure for microwave integrated circuits. This new PBG structure is a two-dimensional square lattice with each element consisting of a metal pad and four connecting branches. Experimental results of a microstrip on a substrate with the PEG ground plane displays a broad stopband, as predicted by finite-difference time-domain simulations. Due to the slow-wave effect generated by this unique structure, the period of the PBG lattice is only 0.1/spl lambda//sub 0/ at the cutoff frequency, resulting in the most compact PEG lattice ever achieved. In the passband, the measured slow-wave factor (/spl beta//k/sub 0/) is 1.2-2.4 times higher and insertion loss is at the same level compared to a conventional 50-/spl Omega/ line. This uniplanar compact PBG (UC-PBG) structure can be built using standard planar fabrication techniques without any modification. Several application examples have also been demonstrated, including a nonleaky conductor-backed coplanar waveguide and a compact spurious-free bandpass filter. This UC-PBG structure should find wide applications for high-performance and compact circuit components in microwave and millimeter-wave integrated circuits.read more
Citations
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Journal ArticleDOI
A 3-dB multilayer coupler with UC-PBG structure
P. Meissner,M. Kitlinski +1 more
TL;DR: In this article, a broadside coupled stripline coupler with a uniplanar compact photonic bandgap (UC-PBG) structure is presented, which is based on a two-dimensional periodically etched ground plane.
Proceedings ArticleDOI
Mutual coupling reduction in microstrip antennas by using dual layer uniplanar compact EBG (UC-EBG) structure
TL;DR: In this paper, a dual layer uni-planar compact EBG (UC-EBG) structure is analyzed and its dispersion diagram is extracted using the commercial finite element full wave solver High Frequency Structure Simulation (HFSS).
Journal ArticleDOI
Side lobe level reduction and gain enhancement of a pyramidal horn antenna in the presence of metasurfaces
Anis Moradi,Farzad Mohajeri +1 more
TL;DR: In this paper, a low-refractive-index metasurface was employed in the interior E-plane walls of a pyramidal horn antenna to achieve low side lobe levels (SLLs) and symmetric radiation patterns in the 13-18 GHz band for satellite communications.
Journal ArticleDOI
Experimental realisation of electromagnetic metamaterials
TL;DR: In this article, the authors present a review of recent developments in the area of experimental realisation of electromagnetic metamaterials and their applications, as well as a survey of the most relevant applications.
Journal ArticleDOI
Periodic Metamaterials Combining Ferromagnetic Nanowires and Dielectric Structures for Planar Circuits Applications
Aimad Saib,Isabelle Huynen +1 more
TL;DR: In this paper, the authors present RF applications of metamaterials combining ferromagnetic and dielectric structures for planar devices, and a theoretical explanation of defect modes operation in a magnetic photonic band-gap (PBG) structure is proposed.
References
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Photonic crystals
Igor S. Nefedov,M. Marciniak +1 more
TL;DR: In this paper, the authors describe photonic crystals as the analogy between electron waves in crystals and the light waves in artificial periodic dielectric structures, and the interest in periodic structures has been stimulated by the fast development of semiconductor technology that now allows the fabrication of artificial structures, whose period is comparable with the wavelength of light in the visible and infrared ranges.
Book
Microstrip Lines and Slotlines
TL;DR: In this article, the authors present a quasi-static analysis of an Enclosed Microstrip and a Slot-Coupled Microstrip Line, as well as a fullwave analysis of Discontinuity Inductance Evaluation.
Journal ArticleDOI
Photonic band-gap structures
TL;DR: In this article, the photonic band gap structures, those three-dimensional periodic dielectric structures that are to photon waves as semiconductor crystals are to electron waves, are discussed.
Journal ArticleDOI
Coplanar Waveguide, a Surface Strip Transmission Line Suitable for Nonreciprocal Gyromagnetic Device Applications
TL;DR: In this article, the coplanar waveguide is used for non-reciprocal magnetic device applications because of the built-in circularly polarized magnetic vector at the air-dielectric boundary between the conductors.