Distributed loop antenna with multiple subloops

摘要

An electronic device may be provided with antenna structures. The antenna structures may be formed using a dielectric carrier structure. The antenna structures may have first and second loop antenna resonating elements. The first loop antenna resonating element may indirectly feed the second loop antenna resonating element. The second loop antenna resonating element may be a distributed loop element formed from multiple antenna resonating element subloops. The second loop antenna resonating element may be formed from a strip of metal with a width that loops around the dielectric carrier. An opening in the metal may separate first and second subloop antenna resonating elements from each other in the second loop antenna resonating element. Openings in the metal may form metal segments that collectively form an inductance for the first subloop. Antenna currents may flow through metal traces on the carrier and portions of an electronic device housing wall.

主权项

1. An antenna, comprising:
a dielectric carrier having a longitudinal axis; and a loop antenna resonating element that extends around the longitudinal axis and surrounds at least part of the dielectric carrier, wherein the loop antenna resonating element includes at least first and second parallel subloops, wherein the first subloop includes metal traces on the dielectric carrier, the metal traces are configured to form a plurality of parallel openings, metal segment structures are formed between the parallel openings, and the metal segment structures collectively produce an inductance in the first subloop.