A Study on Low Profile Orthogonal Polarization Antenna Using Halo Antenna

Mizutani, Tomokazu; Michishita, Naobumi; Morishita, Hisashi; Sato, Hiroshi; Koyanagi, Yoshio

doi:10.23919/eucap53622.2022.9769235

Cited by 1 publication

(1 citation statement)

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“…The authors in refs. [23,24] used a sleeve antenna as the VP element inside the halo antenna ad achieved a small-diameter orthogonal-polarisation antenna by placing the feeding part below. The halo antenna has a self-balancing effect, similar to that of a folded dipole antenna, and can be fed directly using a coaxial cable; therefore, it can be bent vertically to the bottom and fed from below in the same manner as a sleeve antenna.…”

Section: Antenna Configurationmentioning

confidence: 99%

Increasing bandwidth of orthogonally polarised omnidirectional antenna composed of halo and sleeve antennas

Mizutani

Michishita

Sato

et al. 2023

IET Microwaves Antenna & Prop

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In this study, we developed and investigated a small-diameter, low-profile, wideband orthogonal-polarisation multiple-input multiple-output (MIMO) antenna. A polarisation MIMO antenna is a combination of a modified sleeve antenna for vertical polarisation and a halo antenna with four parasitic elements for horizontal polarisation. Four parasitic elements vertically were loaded above and below the halo antenna, and a sleeve antenna with an upper sleeve structure was inserted inside the halo antenna to achieve a low profile, wideband antenna with a small diameter. Simulation and measurement results showed that the proposed antenna achieved a relative bandwidth of 10.1% (|S 11 | and |S 22 | ≤ −10 dB). For the lower frequency wavelength (λ min ) in the required bandwidth, the diameter and height of the proposed antenna are 0.14λ min and 0.57λ min respectively. Additionally, it is capable of orthogonal-polarisation isolation of approximately 20 dB within the operating frequency bandwidth.

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Section: Antenna Configurationmentioning

confidence: 99%