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A metamaterial-based omnidirectional circularly polarized antenna array with combined zero-phase-shift line loop and dipole is presented for 2.4-GHz wireless local area networks. A four-element linear antenna array with an overall size of 66 mm × 66 mm × 258 mm shows desirable performance over the frequency range of 2.4 GHz–2.5 GHz with |S11| less than −10 dB, gain greater than 4.6 dBic, axial ratio...
An experimental methodology to characterize the RF transmission of human body has been presented. It is a great challenge to ensure that the antennas used in the measurement will not be affected by the presence of the human body tissues, which is the key factor in order to characterize the RF transmission accurately and reliably. The proposed methodology of using tissue-embedded antennas has been...
A planar printed ultra-wideband dipole antenna with a shorting bridge has been presented in this paper. The shorting bridge has been used to reduce the size of the dipole and also enhance the radiation performance in terms of the maximum gain and stability of gain at boresight. A wideband balun has been used so as to measure the proposed antenna. The measured results have shown that the proposed antenna...
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