An implantable electronic device comprising: a hermetically sealed housing containing an electrical circuit; and an antenna assembly coupled to the electrical circuit, the antenna assembly comprising an antenna defining a longitudinal axis , the antenna comprising: a dielectric antenna body extending along the longitudinal axis ; and an antenna trace disposed within the dielectric antenna body , the antenna trace comprising: a first trace portion disposed in a first transverse layer and defining a first trace path ; a second trace portion disposed in a second transverse layer longitudinally offset from the first transverse layer and defining a second trace path ; and a junction extending longitudinally, at least in part, and coupling the first trace portion to the second trace portion , wherein, if projected to be coplanar, the first trace path defines a trace boundary and the second trace path is within the trace boundary, characterized in that the trace portions of the antenna are non-overlapping. a hermetically sealed housing containing an electrical circuit; and an antenna assembly coupled to the electrical circuit, the antenna assembly comprising an antenna defining a longitudinal axis , the antenna comprising: a dielectric antenna body extending along the longitudinal axis ; and an antenna trace disposed within the dielectric antenna body , the antenna trace comprising: a first trace portion disposed in a first transverse layer and defining a first trace path ; a second trace portion disposed in a second transverse layer longitudinally offset from the first transverse layer and defining a second trace path ; and a junction extending longitudinally, at least in part, and coupling the first trace portion to the second trace portion , wherein, if projected to be coplanar, the first trace path defines a trace boundary and the second trace path is within the trace boundary, characterized in that the trace portions of the antenna are non-overlapping. a dielectric antenna body extending along the longitudinal axis ; and an antenna trace disposed within the dielectric antenna body , the antenna trace comprising: a first trace portion disposed in a first transverse layer and defining a first trace path ; a second trace portion disposed in a second transverse layer longitudinally offset from the first transverse layer and defining a second trace path ; and a junction extending longitudinally, at least in part, and coupling the first trace portion to the second trace portion , wherein, if projected to be coplanar, the first trace path defines a trace boundary and the second trace path is within the trace boundary, characterized in that the trace portions of the antenna are non-overlapping. a first trace portion disposed in a first transverse layer and defining a first trace path ; a second trace portion disposed in a second transverse layer longitudinally offset from the first transverse layer and defining a second trace path ; and a junction extending longitudinally, at least in part, and coupling the first trace portion to the second trace portion , wherein, if projected to be coplanar, the first trace path defines a trace boundary and the second trace path is within the trace boundary, characterized in that the trace portions of the antenna are non-overlapping. <EOS>