half bandwidth
1.In conclusion: (1) It is appropriate to consider OWFπ-π as a measurement of the conjugation extent of amolecule and it is feasible to predict the absorption half-bandwidth and absorption maximum of complex dyes according to the relationship between OWFπ-π and molecular conformation parameters obtained from simple molecules of the same kind. Consequently, a new thought to improve the prediction accuracy of the absorption spectroscopy is presented in this dissertation.
4.At wavelength of 1.5μm,the modulator with SCPS electrode has 3dB optical bandwidth of 74.03GHz and a half-wave voltage of 2.29V.The modulator with ACPS electrode has 3dB optical bandwidth of 82.25GHz and a half-wave voltage of 1.37V.Numerical analysis results show that the performance of the latter is better than that of the former.
5.The IEEE is moving ahead with plans to standardize full-duplex Fast Ethernet, which will raise bandwidth beyond current half-duplex implementations.
6.The optimum sensitivity, selectivity and precision are obtained, when spectral bandwidth of exit slit of monochromator is set to close to one third of half width of absorption band of sample and the wavelength difference (Δλ) for derivation is chosen to close to half width of derivative spectral band.
8.Finite element method is employed to analyze a novel LiNbO3 optical fiber traveling-wave modulator based on ACPS. Furthermore,the performance of the modulator is calculated through the FEM,the results show that the modulator has the advantages of broadband bandwidth,low half-wave voltage and excellent impedance matching.
9.however, the bandwidth for gain (?3dB drop) is narrower, side-lobe is high, and the structure has at least half-wavelength profile. In this thesis, two types of improved Fabry-Perot resonator antennas are developed, in which a rectangular patch with U-shaped slot is adopted as broadband radiator and surrounded by HIS.
