In traditional adaptive frequency sampling (AFS) techniques, it is inevitable to invert an matrix in order to solve for the coefficients of targeted rational interpolation functions, where is the number of samples. The ill-conditioned matrix of a large restricts traditional AFS techniques to an electromagnetic simulation accelerator for a circuit with few poles or narrow bandwidth responses. In...

This paper demonstrates that no ultra narrow band modulation method, which includes VMSK and VPSK, can have substantially greater efficiency than conventional methods, such as QAM, in transmission in the same frequency band. Keywords– VMSK, VPSK, Ultra Narow Band Modulation, QAM

This paper presents novel planar dynamically reconfigurable double-stub tuners that utilize electrostatically activated microelectromechanical system (MEMS) switches. The tuners operate in the 10–20-GHz frequency range and have stubs that consist of a digital capacitor bank. Each bank has a predetermined number of capacitors that can be selected through the activation of appropriate MEMS switch...