Dual mode radio: A new tranceiver architecture for UWB and 60 GHz-applications

The paper contains a new concept for installation of radio transmission links for digital signals with a mimimum of hardware and no software effort. As opposed to known architectures, the difference in information is evaluated between two free-space modes. A phase modulation is set on the differences between two transmission signals. Both transmitter and receiver work without crystal oscillator. Due to this procedure neither a oscillator or time recovery is required at the receiver. Each signal can for example be demodulated by a multiplier (mixer) in the receiver. Consequently, the receiver can be easily implemented. Owing to the fact that only the difference between two transmission signals influence transmission quality and no longer the absolute phase noise of the transmitter oscillators, the best transmission systems can be realized even with the worst phase noise of high frequency or microwave oscillators. This is the reason why this concept opens up the possibility of direct radio transmission of UWB and double digit GBit values in the microwave range. The architecture, the theory, and the very good measurement results of a 2.45 GHz-demonstrator in SMD-technology is presented.