Microwave phase shifter implemented in photonic technology

Stéphane Paquet; Joe Seregelyi; Dritan Celo; Mario Caron

doi:10.1117/12.871248

21 September 2010 Microwave phase shifter implemented in photonic technology

Stéphane Paquet, Joe Seregelyi, Dritan Celo, Mario Caron

Proceedings Volume 7750, Photonics North 2010; 77500L (2010) https://doi.org/10.1117/12.871248
Event: Photonics North 2010, 2010, Niagara Falls, Canada

Abstract

There are many applications where a very wideband phase shifter is required. Analog pre-distorters to linearize Ka-band amplifiers require a frequency-independent phase shift over at least 1 GHz. The same requirement applies to phased-array antennas or antenna feeds, as well as direct radiating array antennas. Most electrical phase shifters have a fixed operating frequency, discrete phase shift steps (e.g., 5-bit control) and some frequency and temperature dependent responses which result in sub-optimum system performance. The requirements in the 50/40 GHz band will be even more demanding where the bandwidth to be covered could extend up to 5 GHz. The use of photonic technology mitigates the limitations of electrical phase shifters. Operation over a wide range of frequencies (e.g., 4 to 50 GHz) using a single design is possible, and a flat phase response over many GHz's can be achieved. This paper discusses the use of novel microwave photonic technologies to enhance the performance of a broadband phase shifter with respect to power, mass, volume, electromagnetic interference and compatibility of future on-board satellite subsystems. The targeted phase shifter is equally applicable to analog linearizers, phased-array antennas/feeds or other smart antenna schemes where relative phase shifts are required. The results of a prototype phase shifter are presented showing a broadband response over several GHz. Limitations of this device and justification for an integrated version will be discussed. Finally, preliminary results for an integrated device are presented.

Citation Download Citation

Stéphane Paquet, Joe Seregelyi, Dritan Celo, and Mario Caron "Microwave phase shifter implemented in photonic technology", Proc. SPIE 7750, Photonics North 2010, 77500L (21 September 2010); https://doi.org/10.1117/12.871248

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KEYWORDS

Phase shifts

Modulators

Photonic integrated circuits

Prototyping

Control systems

Phase shift keying

Antennas

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