US 12,255,405 B2
Multipath robust antenna design for phase-based distance measurement
Zhuohui Zhang, Tustin, CA (US); and Kiran Uln, Pleasanton, CA (US)
Assigned to Cypress Semiconductor Corporation, San Jose, CA (US)
Filed by Cypress Semiconductor Corporation, San Jose, CA (US)
Filed on Oct. 12, 2023, as Appl. No. 18/485,320.
Application 18/485,320 is a division of application No. 17/410,293, filed on Aug. 24, 2021, granted, now 11,817,633.
Prior Publication US 2024/0113426 A1, Apr. 4, 2024
Int. Cl. H01Q 3/24 (2006.01); H01Q 3/44 (2006.01)
CPC H01Q 3/247 (2013.01) [H01Q 3/44 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An antenna unit disposed on a substrate, the antenna unit comprising:
a plurality of channels;
a first switching element and a second switching element;
an antenna feed coupled to a first channel of the plurality of channels;
a first parasitic element coupled to a first terminal of the first switching element, a second terminal of the first switching element coupled to a ground plane of the substrate, and a control terminal of the first switching element coupled to a second channel of the plurality of channels; and
a second parasitic element coupled to a first terminal of the second switching element, a second terminal of the second switching element coupled to the ground plane of the substrate, and a control terminal of the second switching element coupled to a third channel of the plurality of channels,
wherein each control terminal of the first switching element and the second switching element is configured to toggle to cause the respective first terminal to couple to the respective second terminal, or the respective first terminal to decouple from the respective second terminal.