A Spherical Open-Resonator Antenna

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

View graph of relations



Original languageEnglish
Pages (from-to)1259-1264
Journal / PublicationIEEE Transactions on Antennas and Propagation
Issue number2
Online published21 Nov 2018
Publication statusPublished - Feb 2019


A broad-beam spherical open-resonator (OR) antenna is proposed for wireless mobile communications at millimeter-wave bands. The presented spherical OR antenna, mainly composed of two opposite spherical reflecting surfaces, is excited by an L-probe. Formula for calculating its resonance frequency is given to facilitate the design. The antenna was designed, fabricated, and measured, with reasonable agreement between the measured and simulated results. The measured 10-dB impedance bandwidth and maximum gain are about 4% and 9 dBi, respectively. The spherical OR antenna is compared with the cylindrical and planar counterparts, and it is found that the OR antenna performance is more stable by adapting the spherical reflectors.

Research Area(s)

  • antenna feeds, Antenna measurements, Antenna radiation patterns, antenna radiation patterns, Antennas, Bandwidth, Gain, Gain measurement, millimeter wave propagation, Resonant frequency