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
Novel Flexible Artificial Magnetic Conductor
M. E. de Cos,Fernando Las-Heras +1 more
TL;DR: In this article, a flexible uniplanar AMC design is presented, which is manufactured using laser micromachining and characterized under flat and bent conditions by measuring its reflection coefficient phase in an anechoic chamber.
Proceedings ArticleDOI
Liquid-metal-based phase shifter with reconfigurable EBG filling factor
TL;DR: In this paper, a phase shifter based on reconfigurable filling factors (FF) in a 1D electromagnetic bandgap (EBG) structure is presented, capable of different gradations in phase shift, using liquid metal to fill or evacuate holes in the defected ground plane of a microstrip line.
Reference EntryDOI
Artificial Transmission Lines
TL;DR: In this paper, the concept of artificial transmission lines is introduced, which are transmission lines loaded with reactive elements, and microwave devices with compact size, with superior performance, or with novel functionalities (as compared with those based on conventional lines), can be designed and fabricated.
Proceedings ArticleDOI
Metallic grating on a periodic anisotropic substrate as a planar Artificial Magnetic Conductor
TL;DR: It is shown that the proposed metallic grating on the periodic anisotropic substrate can perform as a low-profile and broadband planar AMC at lower frequencies.
Journal ArticleDOI
Wide stopband compact microstrip lowpass filter using circular ring resonator and split ring resonators
TL;DR: In this paper, a microstrip low-pass filter with a wide stop-band using split ring resonators and a circular ring resonator is introduced, and the passband ripple of proposed filter was measured 0.6 dB and minimum insertion loss of passband is about 0.75 dB at 0.5 GHz frequency.
References
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Proceedings Article
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.