US 12,298,415 B2
Dual-polarized, ridged waveguide magic-t fed, wideband chevron slot pair antenna element for direction finding applications
Jean L. Kubwimana, Merrimack, NH (US); Nicholas C. Denno, Nashua, NH (US); and Luke D. St. Martin, Lunenburg, MA (US)
Assigned to BAE Systems Information and Electronic Systems Integration Inc., Nashua, NH (US)
Filed by BAE Systems Information and Electronic Systems Integration Inc., Nashua, NH (US)
Filed on Sep. 21, 2022, as Appl. No. 17/933,973.
Prior Publication US 2024/0094323 A1, Mar. 21, 2024
Int. Cl. H01Q 1/42 (2006.01); G01S 3/04 (2006.01); H01Q 1/48 (2006.01); H01Q 13/10 (2006.01)
CPC G01S 3/043 (2013.01) [H01Q 1/42 (2013.01); H01Q 1/48 (2013.01); H01Q 13/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An antenna element comprising:
a slot plate defining a first slot and a second slot therethrough, the first and second slots arranged orthogonally relative to each other;
a first element port in operable communication with the slot plate and the first slot;
a first parallel plate pair on the first element port and in operable communication with the slot plate;
a second element port in operable communication with the slot plate and the second slot;
a second parallel plate pair on the second element port and in operable communication with the slot plate;
a cup defining an air cavity below the slot plate and containing the first and second element ports and first and second parallel plate pairs therein;
a difference port in operable connection with a first microstrip probe board;
a sum port in operable connection with a second microstrip probe board; and
a four-port hybrid magic tee (magic-t) waveguide feed operable to feed the first element port, the second element port, the difference port, and the sum port.