We have observed that the size and shape of the conducting reflector of CPW-fed slot antennas using loading metallic strips and a widened tuning stub have significant impact on the antenna impedance matching and radiation pattern. By shaping the reflecting conductor, noticeable enhancements in both radiation pattern which provides uni-directional all frequency operating band and characteristic ...

In this work, a novel electrically reconfigurable phase shifter based on half-mode substrate integrated waveguide (HM-SIW) is proposed. SIW guided transmission line topology, and by using excitation, smaller size can be achieved. Phase shifters are electronic devices that change the of for wide range applications, including inverse scattering sensing. The tunability PIN diodes applied here to a...

A compact rectangular slot antenna with single wide band-notched characteristics is proposed. This co-planar waveguide (CPW) fed antenna is suitable for ultra wide band (UWB), X-, Kuand K-band applications. The patch of the antenna is a modified rectangular slot with T-stub structure in an elliptical slot etched in the radiating patch. This T-stub structure creates wide band notched at WLAN and...

in this paper two nodes to model isotropic and anisotropic media in transmission line matrix method (tlm) are presented. by using these two nodes, the permeability and permittivity of an anisotropic media can be modeled simultaneously. another application of these nodes is in modeling media with permittivity and permeability less than one. in the conventional 2 dimensional tlm, the stubs repres...

STUB. 1 Time-frequency Models Useful manipulations of sound signals—such as time stretching, pitch shifting, and timbral interpolation—depend on time-frequency models of a sound consisting of amplitudeand frequency-modulated sinusoidal partials. We use the exponential presentation of a complex-valued signal ψ:

The authors propose a nanoplasmonic structure based on metal–insulator–metal (MIM) waveguides which consists of 3 db power splitter and side-coupled nanocavity placed between its two output ports. proposed is analysed by the resonant theory dispersion relation. Transmission spectra presented device are also extracted using finite difference time domain method. Numerical simulations demonstrate ...