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A circular-polarized low-profile antenna with omnidirectional characteristics is proposed by utilizing an arrangement of zero-order resonator (ZOR) antennas. The proposed CP antenna is low-profile and has a nearly omnidirectional pattern with good CP characteristics (with an axial ratio around 1.2 dB).
Novel designs for compact dual/triple-band microstrip antennas are proposed with an asymmetric M-shaped patch. The designs utilize vias on the longer arm of the patch for the purposes of compactness and separating of the operational bands. As the two resonant frequencies of antenna 1 are related to certain parts of the patch, one resonant frequency can be flexibly tuned with little effect on the other...
This paper presents a novel compact broad- band patch antenna. The antenna resonance at 0.915, 0.980 and 1.007 GHz, is only 30% area of a conventional design, and a 12.6% bandwidth is achieved. The reduction in area and broadband are achieved by introducing a shorting wall and slot-loaded at the radiating edge of the E-Shaped patch antenna. Details of the proposed compact and broadband design is presented...
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