Built-in patch antenna

An antenna apparatus for a portable communications device, said antenna apparatus comprising:

• a patch radiator member;
• a ground-plane back-up element for said patch radiator member, said patch radiator member being spaced from said ground-plane back-up element to define a first open slot between a first edge of said patch radiator member and said ground-plane back-up element;
• a feed arrangement connecting said patch radiator member to radio circuitry in said portable communications device;
• and
• a reflector-and-slot-extension arm that extends along one side of said patch radiator member and is folded over said first open slot to provide a 180 degree phase reversal by reflect-feedback of an outgoing wave from said first slot.

An antenna apparatus for a portable communications device, said antenna apparatus comprising:

• a patch radiator member;
• a ground-plane back-up element for said patch radiator member,
• a feed arrangement connecting said patch radiator member to radio circuitry in said portable communications device, wherein
• said patch radiator member includes an inner patch portion and an outer patch portion that are spaced from and substantially parallel to one another and that define a first open slot between first edges of said inner and outer patch portions, and a metallic wall portion connecting second edges of the inner and outer patch portions that are opposed to said first edges, said metallic wall portion reflecting a wave propagating toward said metallic wall portion and feeding the reflected wave toward the first open slot with a 180 degree phase reversal;
• and
• a reflector-and-slot extension metallic arm that extends from an end of said metallic wall portion parallel to side edges of the inner and outer patch portions and in a plane perpendicular to a plane of the inner and outer patch portions, said reflector-and-slot extension metallic arm folded over a second open slot between the first edge of the inner patch portion and said ground plane back-up element to provide a 180 degree phase reversal by reflect-feedback of an outgoing wave from the second slot.