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A new model of inductively coupled high frequency radio frequency identification (HF RFID) reader antennas is presented in this paper based on the idea of using the self resonance frequency (SRF) of a small multi turn coil. The introduced multi turn small self resonant coil (MT SSRC) antenna is mathematically analyzed in terms of SRF, number of turns, dimensions and dielectric characteristics of the...
This paper focuses on a preliminary study to determine the quantity of eggs in a fridge using ultra wideband (UWB) impulse responses in the near field. First of all this paper investigates the detectable positions of an egg when placed 1 cm above a UWB antenna array element. Secondly, one egg with six possible configurations on an array are constructed and coupling information is initially obtained...
This paper presents a new design of dual-polarized ultra-wideband (UWB) directional antenna. The antenna consists of four identical conventional UWB monopole antennas. It is excited by signals with equal amplitudes and 180° phase difference. A reflector is applied to achieve directional radiation patterns and improve the antenna gain. Simulated results show that the proposed antenna achieves a frequency...
In order to avoid the interferences from systems operating over 5–6 GHz, a novel design of compact-size wideband notched antenna is presented in this paper for ultra-wideband (UWB) applications. The reference antenna consists of a half circle shaped ground plane and a half circle shaped radiator with a half elliptical cut. A wide notched band is achieved by using an extended strip and a loaded strip...
A compact dual-polarized tapered slot antenna is proposed for ultra-wideband (UWB) through-wall imaging applications. The dual-polarized antenna is obtained by shifting one single-polarized element orthogonally into the other one. The miniaturization of the antenna is realized by employing a folded balun comprising a folded slot on the right side of the radiator and a stepped microstrip line is used...
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