Antenna module for a device in motion

An antenna module comprising:

• a spherical substrate having an outer surface and an inner surface defining a central cavity;
• a flexible circuit located in the central cavity, the flexible circuit having a first antenna feed and a second antenna feed;
• a ground plane located in the central cavity;
• a first antenna element coupled to the first antenna feed, the first antenna element including a first ground short stub coupled to the ground plane, the first antenna element including a first radiating element defining an omnidirectional radiation pattern, the first radiating element including a first main segment coupled to the spherical substrate and extending along at least one of the outer surface or the inner surface, the first main segment following a first arcuate path;
• a second antenna element coupled to the second antenna feed, the second antenna element including a second ground short stub coupled to the ground plane, the second antenna element including a second radiating element defining an omnidirectional radiation pattern, the second radiating element including a second main segment coupled to the spherical substrate and extending along at least one of the outer surface or the inner surface, the second main segment following a second arcuate path oriented parallel to the first arcuate path.

An antenna module comprising:

• a flexible circuit forming a volumetric space having an interior volume, the flexible circuit being wrapped at least partially around the interior volume, the flexible circuit having a first antenna feed and a second antenna feed;
• a ground plane wrapped at least partially around the interior volume;
• a battery in the interior volume and electrically connected to the flexible circuit;
• a first antenna element coupled to the first antenna feed, the first antenna element including a first ground short stub coupled to the ground plane, the first antenna element including a first radiating element defining an omnidirectional radiation pattern, the first radiating element including a first main segment extending along a first arcuate path surrounding the interior volume;
• a second antenna element coupled to the second antenna feed, the second antenna element including a second ground short stub coupled to the ground plane, the second antenna element including a second radiating element defining an omnidirectional radiation pattern, the second radiating element including a second main segment extending along a second arcuate path surrounding the interior volume, the second arcuate path oriented parallel to the first arcuate path;
• wherein the first and second antenna elements have a transmission coefficient lower than −10 dB.