Description:RELATED APPLICATION
[0001] The present application claims priority to U.S. Non-Provisional Patent Application No. 18/477,568 filed on 29 September 2023 and titled “OMNI-DIRECTIONAL, MINIATURIZED ANTENNA SYSTEM” the entire disclosure of which is hereby incorporated by reference.

Technical Field
[0002] This disclosure relates generally to antenna systems, and in particular to omni-directional, miniaturized antenna systems that may be suitable for radio frequency transmissions as well as sensing applications, ranging applications, and/or localization applications.
Background
[0003] As wireless devices such as smart phones, tablets, wearables, notebooks, personal computers, etc. become more popular, the antenna systems may be used for purposes other than wireless communications. For example, many applications exploit the wireless capabilities on a device in order to provide additional features such as proximity detection, motion detection, gesture sensing, localization, and health monitoring. Generally, such applications may repurpose the wireless system, and in particular, the wireless antenna system, in order to provide these additional features. However, these additional features often involve more challenging antenna characteristics.
[0004] One of the main challenges, especially in the context of a notebook or laptop formfactor, is to have an omnidirectional antenna system made from two or more antennas, at least one for transmit (TX) and at least one for receive (RX) (sometimes both used as RX), where their global size is small enough to fit into the lid bezel or other small space, depending on the form factor of the wireless device, where the global size includes the distance between the two or more antennas. In addition, antennas may be fed by a coaxial connecting cable, which may introduce performance degradations. Furthermore, it may be difficult to provide isolation between the two or more antennas.
Brief Description of the Drawings
[0005] In the drawings, like reference characters generally refer to the same parts throughout the different views. The drawings are not necessarily to scale, emphasis instead generally being placed upon illustrating the exemplary principles of the disclosure. In the following description, various exemplary aspects of the disclosure are described with reference to the following drawings, in which:
FIG. 1 shows an example of an antenna system that consists of two, separated radiating groups that mirror one another;
FIG. 2 illustrates an example of an antenna system that consists of three, separated radiating groups that mirror one another;
FIG. 3 illustrates an example plot of the reflection coefficient of the antenna system of FIG. 1;
FIG. 4 shows an example plot of the transmission coefficient of the antenna system of FIG. 1;
FIG. 5 depicts an example plot of the radiation patterns of each antenna group of the antenna system of FIG. 1;
FIG. 6 illustrates an example plot of phase difference of arrival (PDoA) as a function of angle of arrival (AoA) for simulations and measurements of a prototype of the antenna system of FIG. 1; and
FIG. 7 shows an example plot of the measured distance versus physical AoA in azimuth.
Description
[0006] The following detailed description refers to the accompanying drawings that show, by way of illustration, exemplary details and features.
[0007] The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any aspect or design described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects or designs.
, C , Claims:1. An antenna system comprising:
a plurality of antenna groups comprising a first antenna group and a second antenna group, wherein the first antenna group comprises a first parasitic element and a first radiating element fed by a first antenna port, wherein the second antenna group comprises a second parasitic element and a second radiating element fed by a second antenna port; and
a ground plane coupled to the first antenna group and the second antenna group, wherein the first antenna group is separated by a distance along the ground plane from the second antenna group, wherein the first antenna group mirrors the second antenna group.