antenna. The electrical size of the ground plane is kept ϳ1.5 0 ϫ 1.5 0 . Figure 4 plots the measured radiation patterns for circularpolarized antenna at 1.67 GHz, which is defined as the frequency with minimum axial ratio in the operating bandwidth. The axial ratio bandwidth of the proposed antennas is 1.2%. Measured gain is 1.7 dBi. Figure 5 plots the measured radiation patterns for linear-polarized antenna. The measured results show that antenna has almost the same and quite stable copolarized radiation pattern characteristics in both E-and H-planes at the resonant frequency. The cross-polarization levels remain below Ϫ17 dB. Measured gain is 2.3 dBi.
CONCLUSIONSA reconfigurable microstrip triangular antenna has been demonstrated for polarization diversity applications. The polarization switching between LP and RHCP of the microstrip antenna can be adjusted by setting the diodes on or off. From the measured results, low cross-polarization levels when operated in the linear state and good axial ratios in the circular state are observed. This design demonstrates useful features for wireless communication applications.
A novel system that can be used to generate the new optical communication bandwidths (wavelength bands) using a Gaussian pulse propagating within a nonlinear microring resonator system is discussed. By using the wide range of the Gaussian input pulses, for instance, when the input pulses of the common lasers with center wavelengths from 400 to 1400 nm are used. Results obtained have shown that more available wavelength bands from the different center wavelengths can be generated, which can be used to form new dense wavelength division multiplexing bands, whereas the use of the very high channel capacity for personal wavelength and network applications is plausible.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.