Ultra wideband

Antenna is a transformer that transforms electrical signals into electromagnetic waves or vice versa

Electrical signals --> voltages and currents from a transmission line Electromagnetic --> electric and magnetic fields

ULTRA WIDEBAND

Bandwidth more than 20% of carrier frequency or more than 0.5 GHz.

Very short duration pulses less than a few nsec transmitted – typically less than 1 nsec

CHARACTERISTICS FOR UWB COMM.

High data rate achieved higher than 110 Mbps

High processing gain: the ratio of the RF bandwidth of the signal to the information bandwidth of the signal

Higher bandwidth 7500 MHZ.

Low-cost digital signal processing hardware is often used in modern digital radios to generate several modulation methods.

A UWB radio can use several pulses to send one information bit thereby increasing SNR in the receiver

Under software control, the UWB system can dynamically trade date rate, power consumption, and range.