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Quadruple-ridged flared horn feed with internal RFI band rejection filter

Soliman, Ahmed and Weinreb, Sander and Rajagopal, Ganesh and Eckert, Chris and Hilliard, Lawrence (2016) Quadruple-ridged flared horn feed with internal RFI band rejection filter. In: Radio Frequency Interference (RFI), 2016. IEEE , Piscataway, NJ, pp. 115-116. ISBN 978-1-5090-6202-7.

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This paper presents a new technique to reject the radio frequency interference (RFI) from the nearby radar at 9.4 GHz, which causes about 20% blockage of the sky coverage in the Very Long Baseline Inter ferometry (VLBI) telescope at the Goddard Geophysical Astronomical Observatory (GGAO), in Greenbelt, MD. An internal notch filter is proposed by inserting and optimizing two-quarter wavelength slots within the wide band Quad-Ridge Flared Horn (QRFH) feed to achieve RFI band rejection at 9.4 GHz. The simulated result shows about 95 % rejection at 9.4 GHz. The estimated attenuation due to the band rejection slots is of the order of .01 dB at frequencies distant from the rejection frequency. This technique will open the door for designing wideband feeds with RFI band rejection characteristics for different RFI sources.

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Additional Information:© 2016 IEEE. Date Added to IEEE Xplore: 26 January 2017.
Record Number:CaltechAUTHORS:20170202-081435931
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Official Citation:A. Soliman, S. Weinreb, G. Rajagopalan, C. Eckert and L. Hilliard, "Quadruple-ridged flared horn feed with internal RFI band rejection filter," 2016 Radio Frequency Interference (RFI), Socorro, NM, USA, 2016, pp. 115-116. doi: 10.1109/RFINT.2016.7833543
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:73978
Deposited By: Ruth Sustaita
Deposited On:02 Feb 2017 17:38
Last Modified:03 Oct 2019 16:33

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