US 12,424,748 B2
Filtered dual-band patch antenna
Nuri Celik, Milpitas, CA (US)
Assigned to Trimble Inc., Westminster, CO (US)
Filed by Trimble Inc., Sunnyvale, CA (US)
Filed on Dec. 1, 2020, as Appl. No. 17/109,043.
Prior Publication US 2022/0173512 A1, Jun. 2, 2022
Int. Cl. H01Q 5/321 (2015.01); H01Q 1/48 (2006.01); H01Q 5/314 (2015.01); H01Q 5/378 (2015.01); H01Q 9/04 (2006.01); H01Q 19/00 (2006.01)
CPC H01Q 5/321 (2015.01) [H01Q 1/48 (2013.01); H01Q 5/314 (2015.01); H01Q 5/378 (2015.01); H01Q 9/045 (2013.01); H01Q 9/0464 (2013.01); H01Q 19/005 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An antenna configured to receive radio waves at global navigation satellite system (GNSS) frequencies, the antenna comprising:
a ground plane;
an inner conductor disposed above the ground plane, the inner conductor forming a high-frequency patch for receiving radio waves at an upper GNSS frequency band;
an outer conductor surrounding the inner conductor, the outer conductor and the inner conductor collectively forming a low-frequency patch for receiving radio waves at a lower GNSS frequency band;
a filter disposed between the inner conductor and the outer conductor, the filter including at least one capacitive element formed by spacing portions of the inner conductor and the outer conductor at a particular distance apart from each other and over a particular length of the filter, the filter being configured to at least partially block electrical signals at the upper GNSS frequency band and to let pass electrical signals at the lower GNSS frequency band; and
a plurality of feeds connected to the inner conductor for carrying the radio waves at the upper GNSS frequency band received by the high-frequency patch and the radio waves at the lower GNSS frequency band received by the low-frequency patch, the plurality of feeds being disposed around a center of the inner conductor and being spaced by equal angular intervals around the center of the inner conductor, wherein the plurality of feeds include a first feed in direct contact with the inner conductor, a second feed spaced from the first feed by an angular interval and in direct contact with the inner conductor, a third feed spaced from the second feed by the angular interval and in direct contact with the inner conductor, and a fourth feed spaced from the third feed by the angular interval and in direct contact with the inner conductor, and wherein each of the plurality of feeds separately pass through the ground plane.