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Proceedings Paper

Microwave phase shifter implemented in photonic technology
Author(s): Stéphane Paquet; Joe Seregelyi; Dritan Celo; Mario Caron
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Paper 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.

Paper Details

Date Published: 21 September 2010
PDF: 8 pages
Proc. SPIE 7750, Photonics North 2010, 77500L (21 September 2010); doi: 10.1117/12.871248
Show Author Affiliations
Stéphane Paquet, Communications Research Ctr. Canada (Canada)
Joe Seregelyi, Communications Research Ctr. Canada (Canada)
Dritan Celo, Communications Research Ctr. Canada (Canada)
Mario Caron, Communications Research Ctr. Canada (Canada)

Published in SPIE Proceedings Vol. 7750:
Photonics North 2010
Henry P. Schriemer; Rafael N. Kleiman, Editor(s)

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