Compact Archimedean spiral antenna with high gain for electrostatic discharge detection

A compact Archimedean spiral antenna with high gain for electrostatic discharge (ESD) detection is investigated. A frustum-shaped cavity proposed in this work is formed to optimise the maximum antenna gain. Additionally, a helix arm is loaded to enhance antenna gain in lower band. The measured results demonstrate that the proposed antenna, which employs a unidirectional radiation mode, exhibits a maximum antenna gain ranging from -0.74 dBi to 9.46 dBi and a voltage standing wave ratio less than 3 across a frequency range of 0.65-5 GHz. A test system consisted of proposed antenna and a commercial ESD detection antenna is established. The verified results indicate that the proposed antenna has a performance close to the commercial antenna, so that proposed antenna with compact size is preferred to be utilised for ESD detection. A compact Archimedean spiral antenna with high gain for electrostatic discharge (ESD) detection is investigated. A frustum-shaped cavity (FSC) proposed in this work is formed to optimise the maximum antenna gain. The verified results indicate that the proposed antenna with compact size is preferred to be utilised for ESD detection.image