Rejection of interference and near-field coupled LNA-noise on FPA-fed multibeam dish antennas using 3D analog filters

Arjuna Madanayake; Chamith Wijenayake; Thushara Gunarathne; Leo Belostotski; Yongsheng Xu; Len Bruton

doi:10.1117/12.2016093

31 May 2013 Rejection of interference and near-field coupled LNA-noise on FPA-fed multibeam dish antennas using 3D analog filters

Arjuna Madanayake, Chamith Wijenayake, Thushara Gunarathne, Leo Belostotski, Yongsheng Xu, Len Bruton

Author Affiliations +

Proceedings Volume 8714, Radar Sensor Technology XVII; 871412 (2013) https://doi.org/10.1117/12.2016093
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

Abstract

A three dimensional (3-D) spatio-temporal analog signal processing scheme is presented for the selective removal of off-dish interference and noise from focal plane array (FPA) received signals. The method exploits specific geometrical properties of the 3-D spatio-temporal frequency spectrum of FPA signals to perform the filtering operation. A 3-D infinite impulse response (IIR) filter having a cone-shaped filter passband in the 3-D spatio-temporal frequency space is employed to extract the spectra of desired FPA signals while rejecting the spectral components from undesired off-dish interference and coupled noise from front-end electronics. A proof-of-concept example is provided by considering the filtering operation in 3-D spatio-temporal frequency domain.

Citation Download Citation

Arjuna Madanayake, Chamith Wijenayake, Thushara Gunarathne, Leo Belostotski, Yongsheng Xu, and Len Bruton "Rejection of interference and near-field coupled LNA-noise on FPA-fed multibeam dish antennas using 3D analog filters", Proc. SPIE 8714, Radar Sensor Technology XVII, 871412 (31 May 2013); https://doi.org/10.1117/12.2016093

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