Patent ID: 11450969

Abstract:
A frequency reconfigurable miniaturized folded slot-based antenna for use with Internet of Things (IoT) devices. The antenna resonates at a lower band in the sub GHz range, and in an upper band at a low GHz range of 1 to 2 GHz. A front and a back side of a dielectric circuit board of the antenna includes a first metallic layer and a second metallic layer, respectively. Each metallic layer includes a meandering slot having a first and second plurality of connected legs, including at least a first leg, a center leg, and a last leg, respectively, where the first leg and the last leg wrap around the dielectric circuit board from the first metallic layer to the second metallic layer. The first metallic layer includes a varactor diode, a first choke and a second choke, and an open-ended microstrip transmission line for receiving signals from a feed line.