US 12,278,605 B2
Band pass filter circuit with over-voltage protection
George M. Kauffman, Hudson, MA (US); and Christopher Aaron Penwell, Cheshire, CT (US)
Assigned to NEXTEK, LLC, North Billerica, MA (US)
Filed by NexTek, LLC, North Billerica, MA (US)
Filed on Mar. 31, 2023, as Appl. No. 18/129,569.
Claims priority of provisional application 63/326,533, filed on Apr. 1, 2022.
Prior Publication US 2023/0318575 A1, Oct. 5, 2023
Int. Cl. H03H 11/04 (2006.01)
CPC H03H 11/04 (2013.01) 17 Claims
OG exemplary drawing
 
1. A band pass filter circuit for transmitting electromagnetic signals of an operational frequency band, the band pass filter circuit comprising:
(a) a transmission line connecting an input terminal to an output terminal;
(b) a high pass filter for blocking transmission to the output terminal of electromagnetic signals received by the transmission line that fall below the operational frequency band, at least a portion of the high pass filter being connected in series with the transmission line between the input terminal and the output terminal;
(c) a low pass filter for blocking transmission to the output terminal of electromagnetic signals received by the transmission line that fall above the operational frequency band, the low pass filter being separate from the high pass filter, at least a portion of the low pass filter being connected in series with the transmission line between the high pass filter and the output terminal;
(d) a primary suppressor for clamping high-voltage, transient electromagnetic energy received by the transmission line, the primary suppressor connecting the transmission line to a ground terminal, the primary suppressor being connected to the transmission line between the input terminal and the high pass filter; and
(e) a set of supplemental suppressors for clamping high-voltage, transient electromagnetic energy received by the transmission line, each of the set of supplemental suppressors connecting the transmission line to the ground terminal, each of the set of supplemental suppressors being connected to the transmission line between the high pass filter and the output terminal.