Abstract
AbstractA thin antenna structure to operate in GNSS (Global Navigation Satellite System) and BLE (Bluetooth Low Energy) communication standards is proposed. The antenna was built on a flexible and thin Kapton material inserted between 2 layers of bovine leather, suitable for limited weight and slim ankle bracelet designs. Proposed antenna structure consist of 2 opposed planar inverted F antennas modified using matching stubs, sharing the same substrate and ground plane, with total size of 96.8 × 35 × 4.14 mm. The ground plane area of the antenna can be used for electronic circuit and battery placement. The antenna structure operates in the following specific 4 bands: BeiDou (1561 MHz), GPS (1575 MHz), GLONASS (1602 MHz), and BLE (2400 MHz). The antenna exhibited great agreement between electromagnetic simulations in ADS Momentum and measurements performed into 3D anechoic chamber with anthropomorphic leg‐foot model from Speag. The antenna peak gain is approximately −1.8 dBi for GNSS bands and −2.0 dBi for BLE.
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