Ring resonator

We present a novel low-power architecture for the generation of multilevel pulse amplitude modulation (PAM-4) signal generation. A new structure of a micro-ring resonator based on a 44 MMI (Multimode interference) coupler is proposed to control the coupling coefficient and Fano shapes.

11p viambani 18-06-2024 1 1   Download

We demonstrated a metamaterial absorber (MMA), which can be controlled by variation of conductivity or temperature. The metamaterial (MM) structure is based on three individual layers of periodic split ring resonator (SRR), a dielectric, and metallic film.

4p viberbers 09-08-2023 6 5   Download

In this paper, we present a novel structure for ultra-compact triplexer by using two staggered ring resonators that are coupled with straight directional couplers based on submicron waveguides.

4p vilexus 05-10-2022 8 4   Download

Syntheses and detailed spectroscopic characterizations of two similar conjugated microporous polymers formed by A4 + B2 and A2 + B3 type functional monomers via Sonogashira–Hagihara polycondensation are presented in this report. The two porous polymeric networks possess mono-, di-, and tri- (1-, 1,4-, and 1,3,5-, respectively) substituted benzene rings and fused thiophenic moieties (dithienothiophenes). Because of the different conjugation patterns, their solid state nuclear magnetic resonance, infrared, and ultraviolet/visible light absorption analyses indicated significant differences.

10p tudichquannguyet 29-11-2021 10 0   Download

We proposed a multi-band metamaterial absorber (MA) based on high-order magnetic resonance using ring-shaped structures. We obtained three absorption peaks at 4.71 GHz (the fundamental resonance), 13.39 GHz (the third-order behavior), and 19.91 GHz (the fifth-order behavior) with correspondent absorptions of 90%, 100%, and 99.33%, respectively.

12p parasite 02-06-2021 15 1   Download

The MS analysis of these alkene substrates helps us understand their structures. In this paper, the analysis is focused on not only on molecular weights but also on primary fragmentations based on effects such as resonance and ortho effects to obtain more data for these kinds of compounds.

6p tamynhan5 10-12-2020 6 1   Download

Chapter 22 - What does the benzene ring do to its substituents? After attending lectures, reading the text and working assigned problems related to this chapter, students will have acquired the following knowledge and abilities: Given the IUPAC name of a phenol derivative, be able to draw its structure; know how resonance influences the stability of benzylic cations, anions, and radicals as compared to similar non-benzylic species; be able to apply a benzyl ether as a protecting group in multi-step synthesis; given a series of phenols, be able to rank their relative acidity.

38p larachdumlanat122 26-11-2020 8 0   Download

Since the first observation of the fascinating absorption property, metamaterials have been become a scientific spotlight. A distinctive interest has been given to metamaterial absorber (MA) with a broad operating band, which are more useful for future applications. In this report, we studied numerically and experimentally the electromagnetic properties of perfect MAs using ring-shaped structures at microwave frequencies. By creating a magnetic resonance, the ring structure confines electromagnetic energy at the first- and third-order resonances.

12p nguyenxuankha_bevandan 14-08-2020 13 1   Download

A compact three-port metamaterial multiple-input-multiple-output (MIMO) antenna using complementary split-ring resonator (CSRR) loaded ground have demonstrated in order to reduce the size and enhance the antenna performance. The antenna is designed on FR-4 material and simulated by HFSS software.

10p abcxyz123_02 03-03-2020 13 0   Download

Misalignment is a problematic challenge in RF MEMS resonators. It causes asymmetry in the ultra symmetric radial contour mode disk resonators and degrades their performance by increasing the insertion loss and decreasing their quality factors (Q). Self-alignment method seems to be a good solution for misalignment problem, but it cannot be directly applied on high performance ring shape anchored resonators. This paper discusses misalignment effects for the ring shape anchored resonators and proposes a method for reconfiguring its anchor to be compatible with self-alignment process.

7p kethamoi1 17-11-2019 16 0   Download

In this paper, we only focused on consider phenomenon of spontaneous symmetry breaking in the case of space dependent coupling. The results show that in the case of a coupling between the two rings is a function of single-Gaussian symmetry breaking only between rings. In contrast, in the case of a coupling between them as a double-Gaussian function, the symmetry breaking occurs only in each ring, breaking the symmetry of the space dependent coupling.

10p vihermes2711 01-10-2019 11 0   Download

Bài viết trình bày một cấu trúc vòng chia cộng hưởng CSRR (Complementary Split Ring Resonator) cho tần số 1,9 GHz. Đồng thời, một cấu anten PIFA tái cấu hình theo tần số sử dụng chuyển mạch PIN diode nhằm tạo ra hai cấu hình có tần số khác nhau, 1,9 GHz và 2,1 GHz. Để giảm nhỏ kích thước của anten PIFA tái cấu hình theo tần số, cấu trúc CSRR được đề xuất ở trên được tích hợp vào mặt phẳng bức xạ của anten.

9p vihitachi2711 03-05-2019 39 2   Download

In this paper, I will deal with dual-band electrically small antenna (ESA). The miniaturized radiation structure consists of a small ring and concentric split-ring resonator. The resonant response of the proposed radiation structure is characterized by the coupling among two split-ring resonators and the small ring. This interaction provides an additional capacitance to further reduce the total dimension of the resonant electrical length.

8p byphasse043256 24-03-2019 10 0   Download

(bq) part 1 book "organic chemistry as - a second language" has contents: bond - line drawings, resonance, acid–base reactions, geometry, nomenclature, conformations, configurations, mechanisms.

220p bautroibinhyen20 06-03-2017 37 7   Download

This book collects chapters on different theoretical and experimental aspects of photonics crystals for Nanophotonics applications. It is divided in two parts - a theoretical section and an experimental and applicative section.

0p phoebe75 19-02-2013 54 6   Download

The microstrip ring resonator was first proposed by P. Troughton in 1969 for the measurements of the phase velocity and dispersive characteristics of a microstrip line. In the first 10 years most applications were concentrated on the measurements of characteristics of discontinuities of microstrip lines. Sophisticated field analyses were developed to give accurate modeling and prediction of a ring resonator. In the 1980s, applications using ring circuits as antennas, and frequency-selective surfaces emerged...

378p beobobeo 01-08-2012 61 7   Download

Magnetic resonance spectroscopy (MRS), unlike conventional magnetic resonance imaging (MRI), provides information on the brain’s chemical environment (rather than neuroanatomical structure) and the data are most commonly presented as line spectra. This capacity for determining brain metabolite concentrations provides the basis for clinical investigation of, and differentiation between, neurological and neurosurgical conditions.

400p wqwqwqwqwq 21-07-2012 121 12   Download