A Wideband and Small Diameter Halo Antenna with Four Parasitic Elements

Mizutani, Tomokazu; Wada, Y.; Michishita, Naobumi; Morishita, Hisashi

doi:10.1109/apwc52648.2021.9539725

Cited by 1 publication

(1 citation statement)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Halo antenna have been reported to be narrow horizontally polarized omnidirectional antenna [3]. Although Halo antenna is small, they have narrow bandwidth characteristics with a relative bandwidth of about 4%; thus, a method to broaden the bandwidth by loading the parasitic elements onto a Halo antenna has been reported [4,5]. However, conventional methods of broaden the bandwidth require the vertical loading of parasitic elements above and below the antenna, resulting in a structure with a large antenna element height owing to the dimensions of the parasitic elements and spacers.…”

Section: Introductionmentioning

confidence: 99%

Low-profile double-shell Halo antenna with wideband characteristic

et al. 2023

View full text Add to dashboard Cite

In this study, the characteristics of a wideband, low-profile, double-shell Halo antenna is investigated. The Halo antenna is a horizontally polarized antenna with a small diameter and a relative bandwidth of about 4%, which corresponds to a narrow bandwidth characteristic. Therefore, as a conventional broadband method, it is possible to increase the bandwidth of the Halo antenna while maintaining the antenna diameter by loading parasitic elements vertically above and below. However, the disadvantage of this method is that the antenna height increases owing to vertical stacking of the elements. In this study, a double-shell structure with the parasitic elements placed inside the Halo antenna is used to achieve a relative bandwidth of 9.3% while maintaining the antenna height and diameter.

show abstract

Section: Introductionmentioning

confidence: 99%