Antenna with selectively enabled inverted-F antenna elements

An apparatus for wireless communications comprising:

• a substrate including a ground plane;
• a radio frequency (RF) signal port;
• and
• a RF antenna unit including:
• a feed portion for electrically coupling the RF antenna unit to the RF signal port, the feed portion defining an axis of symmetry of the RF antenna unit;
• at least a first selective grounding portion and a second selective grounding portion, each selective grounding portion being configured to selectively enable or disable an electrical coupling to the ground plane via the substrate;
• a first conductive arm providing electrical conduction between the feed portion and the first selective grounding portion, extending from the first selective grounding portion towards the feed portion and extending beyond the feed portion;
• and
• at least a second conductive arm providing electrical conduction between the feed portion and the second selective grounding portion, extending from the second selective grounding portion towards the feed portion and extending beyond the feed portion;
• the feed portion, the first selective grounding portion and the first conductive arm together defining a first inverted F antenna (IFA) element of the RF antenna unit;
• the feed portion, the second selective grounding portion and the second conductive arm together defining at least a second IFA element of the RF antenna unit;
• the feed portion being common to both the first and at least the second IFA elements, the first IFA element and at least the second IFA element being arranged symmetrically relative to each other about the axis of symmetry.