Can we have microwave receivers without high frequency electronics?
Időpont:��2009. május 25. hétfő 15:00
Helyszín:�
Budapesti Műszaki és Gazdaságtudományi Egyetem
Szélessávú Hírközlés és Villamosságtan Tanszék
V2 épület VI emelet 627. számú terem
Előadó: Peter Herczfeld, Microwave Photonics Center, Drexel University
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Abstract
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Recent developments in coherent, phase modulated fiber-optic links raised the specter of implementing microwave receivers in the optical domain, without the use of electronics. The key components of the coherent links are:
i.����penalty free optical domain frequency down-conversion using quadratic phase modulators,
ii.���photonic phased locked loop (PPLL) phase demodulator and
iii.� optical generation and distribution of frequency agile microwave local oscillator (LO) signals.
The operation of these components as well as their implementation using photonic integrated circuits (PICs) will be discussed.
The optical domain implementation of the microwave receiver is expected to outperform its electronic counterpart using the state of the art MMICs. Specifically, the current receiver is expected to operate in the 2 to 18GHz range with an instantaneous bandwidth of .5GHz, have a spurious free dynamic range better than 147dBHz2/3 and a noise figure of 3dB.
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