A Low Cost Broadband Probe for Electric Field Measurement
نویسندگان
چکیده
Design and fabrication of a low cost sensor for measuring electric field over a broad range of electromagnetic (EM) frequency is presented. The electric field probe consists of an electrically short dipole antenna and diode detector connected to an instrumentation amplifier via a high impedance line. The rectified diode voltage is conveyed over the high impedance line for real time data acquisition. A low cost probe is fabricated using homemade screen printable carbon ink on flexible polyethylene sheet for electric field measurement. Carbon ink composition with good adherence to polyethylene substrate and high impedance (1M&!/m) is chosen for sensor fabrication. Preliminary results are presented for near field EM radiation from a spiral antenna irradiating a lossy dielectric medium at 433 MHz.
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