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This paper demonstrates a new approach to build 3D reconfigurable antennas at an extremely low cost and the first 3D printed reconfigurable helical antenna based on microfluidics and liquid metal alloy (LMA). With the fused deposition modeling (FDM) 3D printing technique, 3D microfluidic channel can be fabricated in a short production cycle cost-effectively. EGaIn, a non-toxic LMA, is filled into...
In this paper an approach to fully 3D print Radio-Frequency (RF) components and devices, with commercial, low-cost platforms, is presented. The manufacturing methodology and materials are described, while ring resonators and microstrip lines are used to characterize the materials up to 8 GHz. The substrate used is Acrylonitrile Butadiene Styrene (ABS), which has been demonstrated to have a permittivity...
A foldable origami spring structure is presented in this paper, which can be expanded and collapsed. Based on this structure, one origami antenna is designed with operating frequency that can be changed based on its height. The return loss, far-field radiation pattern and peak gain of this antenna are presented.
A novel origami accordion antenna structure is presented, which can be expanded and collapsed. Based on this structure, one origami antenna is designed with operating frequency that can be changed based on its height. The return loss, far-field radiation pattern and peak gain of this antenna are examined.
A novel inkjet-printed electromagnetic bandgapbacked (EBG) RFID tag has been designed and tested for wearable and metal mount applications. An array of split-ring resonators and a dipole antenna matched to an RFID chip at 915 MHz were designed and inkjet printed on paper substrate. Measurements of the tag in free space show that the required reader's minimum transmit power for successful tag reading...
Enhanced optical transmission properties of a single subwavelength slit in a metallic film is theoretically studied by the Fabry-Pérot-like formula. By using the analytical model based on a modal expansion method, reflection coefficient of electric field amplitude of surfaces at two slit ends is thoroughly analyzed and an empirical Fabry-Pérot-like formula is derived. Good agreement between our...
The performance of the most commonly used metal antennas close to the human body is one of the limiting factors of the performance of bio-sensors and wireless body area networks (WBAN). Due to the high dielectric and conductivity contrast with respect to most parts of the human body (blood, skin, …), the range of most of the wireless sensors operating in RF and microwave frequencies is limited to...
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