Trace antennas and circuit board including trace antennas

A circuit board including a multi-band Planar Inverted-F Antenna, PIFA, the circuit board comprising:

• a feed point adjacent an edge of the circuit board, the feed point being connected to a plurality of traces, a first antenna trace of the plurality of traces extending away from the feed point along the edge of the circuit board, a second antenna trace of the plurality of traces extending away from the feed point inboard of the first antenna trace, the first antenna trace and the second antenna trace being of unequal length and being closely coupled along a coextensive length, the longer of the first antenna trace and the second antenna trace further comprising a loop section extending in a direction away from the ground plane, and a third antenna trace of the plurality of traces extending away from the feed point in a direction opposite that of the first antenna trace and the second antenna trace,
• the circuit board comprising
• a ground plane coplanar with the plurality of traces, an edge of the ground plane extending alongside and closely coupled with the second antenna trace of the plurality of traces to cause an area of the ground place adjacent the edge to radiate at a selected lower operational frequency of the PIFA, and
• a pair of wings, wherein the pair of wings extend outwards along the edge of the circuit board, each wing of the pair of wings being separated to define a gap and wherein the loop section extends over a surface of one of the wings and the third trace extends over a surface of the other of the wings.

A multi-band trace antenna comprising:

• a first antenna trace having a first length;
• a second antenna trace having a second length different than the first length of the first antenna trace;
• a feed point connected to the first antenna trace and the second antenna trace
• wherein the first antenna trace extends away from the feed point in a first direction, and the second antenna trace extends away from the feed point in the first direction inboard of the first antenna trace, and
• further wherein an edge of the second antenna trace is indented to vary a width of the second antenna trace at a plurality of points along a length of the second antenna trace and to increase radiation of the first antenna trace at a selected higher operational frequency of the antenna.