Compact Dual-Band Dual-Mode Antenna with Omni-/Unidirectional Radiation Characteristics

Chun Xu Mao, Douglas H. Werner, Yao Zhang, Xiu Yin Zhang

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


A novel dual-band dual-mode antenna that operates at 2.45/5.8 GHz is proposed in this letter. The antenna exhibits linearly polarized omnidirectional radiation in the low band, and circularly polarized broadside radiation in the high band. To improve the 3 dB axial-ratio (AR) bandwidth, both truncated patches and a sequential rotation technique are combined together in the antenna design. The omnidirectional radiation in the low band is achieved by exciting four open-ended slots etched in the ground plane for the first time. The four slots form a magnetic-dipole-like current distribution along the edge of the ground plane, resulting in omnidirectional radiation. The low- and high-band operations are seamlessly integrated into a common design, sharing the same structure. This work provides a novel approach for improving the versatility of a radio frequency front-end subsystem without increasing footprint. The proposed antenna is prototyped and measured, showing good results in terms of impedance/AR bandwidths, isolation, radiation, and polarization.

Original languageEnglish (US)
Article number8871189
Pages (from-to)2657-2660
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
Issue number12
StatePublished - Dec 2019

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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