Journal ArticleDOI
A uniplanar compact photonic-bandgap (UC-PBG) structure and its applications for microwave circuit
Reads0
Chats0
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
More filters
Proceedings ArticleDOI
Calculation of the dispersion diagram for planar electromagnetic bandgap structures
TL;DR: In this paper, the authors presented a numerical technique for the accurate calculation of the dispersion diagram of planar electromagnetic bandgap structures, which is based on coupling the energy of an incident plane-wave in a perturbed structure, which has the same resonance frequencies, and studying the reflection spectra form the structure.
Proceedings ArticleDOI
Improved microstrip coupled-line bandpass filters for spurious responses suppression
TL;DR: In this paper, a microstrip coupled-line bandpass filter using an improved SIR configuration is proposed to suppress the harmonic of the microstrip filter without any additional devices and regardless of the substrate.
Journal ArticleDOI
Compact Wideband Microstrip Antenna Array Using Sequential-Phase Feed Network and Metasurfaces
TL;DR: To improve the bandwidth, cross-polarization ratio (XPR) and gain of microstrip antenna, a compact single-point fed wideband circularly polarized (CP) 2 × 2 micro Strip antenna array is proposed, which verifies the rationality of the design.
Proceedings ArticleDOI
New coplanar-waveguide folded /spl lambda//4 open stub structure
TL;DR: In this article, a novel folded skill and a simpler way than that of the old methods was proposed, and the advantage of this new structure reveals a better skirt factor than the conventional folded /spl lambda//4 series open stub, and reduces the folded area of the conventional structure by 50% at least.
Proceedings ArticleDOI
Impedance bandwidth enhancement of low noise amplifier using photonic bandgap structures
TL;DR: In this paper, the effect of different Compact Microstrip Resonant Cell (CMRC) structures on the performance of LNA has been investigated and the measured results show an improvement in the input impedance bandwidth up to 1.1GHz at the cost of some drop in gain.
References
More filters
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.