Group Delay-Based Wideband Photonic Receive-Mode Radio-Frequency Beamforming

Autor:	Jason D. McKinney, Frank Bucholtz, Matthew J. Mondich, Ian M. Maize, Joseph M. Singley, Keith J. Williams
Rok vydání:	2020
Předmět:	Beamforming Physics business.industry Bandwidth (signal processing) Noise figure Atomic and Molecular Physics and Optics Radiation pattern Antenna array Optics Radio frequency Wideband business Computer Science::Information Theory Group delay and phase delay
Zdroj:	Journal of Lightwave Technology. 38:5893-5907
ISSN:	1558-2213 0733-8724
Popis:	A multi-channel wideband group delay-based photonic receive-mode beamformer implemented with bulk fiber-based true-time delays, discrete flat-top arrayed waveguide gratings (AWGs), and a linear receive antenna array is presented. The frequency-independent beam pointing angle is derived theoretically, along with the multi-channel RF gain and noise figure. Dependence of RF gain and noise figure on channel count is investigated experimentally and shown to agree with theoretical prediction. Flat-top and Gaussian AWG optical filter transmission and bandwidth are measured and their effects on RF gain and phase are compared. Effects of channel-to-channel RF amplitude and phase mismatch on the RF response are shown by comparison of measurement with theory. Finally, measured beamformer antenna patterns are provided to demonstrate the formation of four simultaneous beams.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4b031047aa31dd1fe3d09b4ce4ed8c32 https://doi.org/10.1109/jlt.2020.3005900 Zobrazit plný text záznamu