Design of novel multi-band printed dipole antennas fed by a modified microstrip ring hybrid
作者： Fu-Chiarng Chen , Li-Yuan Cheng
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摘要: In this paper, novel printed dipole antennas fed from end to are presented for multiple wireless services. Unlike conventional antenna the center, two arms integrated with a modified three-port microstrip ring hybrid, whose sum port is opened, can achieve model of end-to-end-fed antenna. Because phase difference and magnitude ratio signals output ports hybrid vary frequency frequency, balanced unbalanced excite different resonance modes. Dual-band multi-band which have simple geometries be directly fabricated on PCB board single feed constructed tested. Proposed suitable many communication application, such as WLAN 2.4/5.2GHz, WiMAX 2.6/3.5GHz, ISM band, DCS1800, PCS1900, UMTS cellular system, etc.
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