Ultra Wideband Signals and Systems in Communication Engineering

Ultra Wideband Impulse Radio Superregenerative Reception

“…Furthermore, Gaussian pulses are not only optimum signals for SR receivers operated in the slope-controlled state (Moncunill et al, 2007a), but they, and their derivatives (e.g. Gaussian monopulse; first derivative of Gaussian; Mexican hat, second derivative of Gaussian; and Gaussian doublet) are among the most widely used signals for UWB IR (Ghavami et al, 2004;Opperman et al, 2004). Superregenerative oscillators targeting the FCC/ECC UWB spectrum mask must oscillate at a frequency higher than that of SROs operating at lower frequency bands (e.g.…”

Spiral Tuning Stub CPW-Fed UWB Slot Offset, Edge Cleft and Edge Slotted Antennas

“…The feasible UWB antenna design face some challenges including the ultra wide impedance matching, omni directional radiation pattern, constant gain, high radiation efficiency, low profile, compact antenna size and easy manufacturing [2]. Since the CPW fed planar slot antennas have the advantages of wide bandwidth, simple structure, less radiation loss, low cost and easy integration of monolithic microwave integrated circuits (MMIC) [3].…”

A Compact CPW-Fed Uwb Slot Antenna With Cross Tuning Stub

“…The design of antennas for UWB applications must satisfy the following requirements. They are ultra wide impedance bandwidth, omni directional radiation pattern, constant gain high radiation efficiency, constant group delay, low profile and easy manufacturing [2]. Interestingly the planar slot antennas with CPW fed posses the features mentioned above with simple structure, less radiation loss, less dispersion and easy integration of monolithic microwave integrated circuits (MMIC) [3].…”