UWB is a very attractive technology for many applications. It provides many advantages such as fine resolution and high power efficiency. Our interest in the current study is the use of UWB radar technique in microwave medical imaging systems, especially for early breast cancer detection. The Federal Communications Commission FCC allowed frequency bandwidth of 3.1 to 10.6 GHz for this purpose. ...

Bandwidth labelling is a well known research area in graph theory. We provide a new proof that the bandwidth of Mobius ladder is 4, if it is not a $K_{4}$, and investigate the bandwidth of a wider class of Mobius graphs of even strips.

Quasi-phase matching schemes employing quasi-periodic or random spatial modulations, previously applied to perturbative nonlinear optics, are demonstrated theoretically for the extreme nonlinear optical process of high harmonic generation. We show that quasi-periodic quasi-phase matching of high harmonic generation can be used for simultaneous enhancement of arbitrarily chosen spectral regions....

This paper proposed enhancing the bandwidth of a millimeter wave microstrip patch antenna (MPA) and its array for 5G mobile communication network. The is designed fabricated on Rogers RT Duroid 5,880 substrate with standard thickness 0.5 mm, relative dielectric constant 2.2, tangent loss 0.0009. With center frequency 28 GHz, measured return -21.37 dB, 1.14 gain 6.27 dBi, single element operates...