ORCID Profile
0000-0002-4504-6139
Current Organisations
Macquarie University
,
University of Technology Sydney
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Communications Technologies | Communications engineering | Antennas and Propagation | Satellite communications | Antennas and propagation
Expanding Knowledge in Engineering | Expanding Knowledge in Technology |
Publisher: IEEE
Date: 07-2013
Publisher: MDPI AG
Date: 07-09-2023
Publisher: MDPI AG
Date: 22-10-2022
DOI: 10.3390/ELECTRONICS11213423
Abstract: The high band pattern distortions in an 1810–2690 MHz frequency band, introduced due to low band radiators working in 690–960 MHz, are mitigated by a simple yet effective change to the low band-radiating elements. A novel horizontal and vertical radiating element is designed instead of a conventional slant polarized low band-radiating element to reduce the scattering. The slant polarization is achieved from the horizontal and vertical dipoles, using a 180° hybrid coupler. The vertical dipole length is optimized to improve the high band patterns. The experimental results verified that the proposed horizontal and vertical low band dipole result in the reduction of high band pattern distortions. The low band-radiating elements provide dB return loss over the entire frequency band 690–960 MHz and provide comparable pattern performance to a conventional slant low band dipole.
Publisher: Wiley
Date: 28-05-2013
DOI: 10.1002/MOP.27675
Publisher: Springer Science and Business Media LLC
Date: 28-07-2021
DOI: 10.1038/S41598-021-93975-2
Abstract: The gain of some aperture antennas can be significantly increased by making the antenna near-field phase distribution more uniform, using a phase-transformation structure. A novel dielectric-free phase transforming structure (DF-PTS) is presented in this paper for this purpose, and its ability to correct the aperture phase distribution of a resonant cavity antenna (RCA) over a much wider bandwidth is demonstrated. As opposed to printed multilayered metasurfaces, all the cells in crucial locations of the DF-PTS have a phase response that tracks the phase error of the RCA over a large bandwidth, and in addition have wideband transmission characteristics, resulting in a wideband antenna system. The new DF-PTS, made of three thin metal sheets each containing modified-eight-arm-asterisk-shaped slots, is significantly stronger than the previous DF-PTS, which requires thin and long metal interconnects between metal patches. The third advantage of the new DF-PTS is, all phase transformation cells in it are highly transparent, each with a transmission magnitude greater than − 1 dB at the design frequency, ensuring excellent phase correction with minimal effect on aperture litude distribution. With the DF-PTS, RCA gain increases to 20.1 dBi, which is significantly greater than its 10.7 dBi gain without the DF-PTS. The measured 10-dB return loss bandwidth and the 3-dB gain bandwidth of the RCA with DF-PTS are 46% and 12%, respectively.
Publisher: IEEE
Date: 02-2020
Publisher: IEEE
Date: 09-08-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2014
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Publisher: IEEE
Date: 03-2013
Publisher: IEEE
Date: 04-2013
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
Publisher: IEEE
Date: 31-10-2022
Publisher: IEEE
Date: 10-07-2022
Publisher: MDPI AG
Date: 18-10-2023
DOI: 10.3390/S23208561
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2022
Publisher: IEEE
Date: 26-03-2023
Publisher: IEEE
Date: 31-10-2022
Publisher: IEEE
Date: 12-2019
Publisher: The Electromagnetics Academy
Date: 2015
DOI: 10.2528/PIER15070801
Publisher: IEEE
Date: 07-2012
Publisher: Informa UK Limited
Date: 2011
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2022
Publisher: Informa UK Limited
Date: 19-04-2019
Publisher: IEEE
Date: 04-12-2021
Publisher: IEEE
Date: 16-02-2023
Publisher: IEEE
Date: 03-2012
Publisher: IEEE
Date: 26-03-2023
Publisher: IEEE
Date: 27-03-2022
Publisher: IEEE
Date: 07-2013
Publisher: IEEE
Date: 10-07-2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
Publisher: IEEE
Date: 15-11-2021
Publisher: MDPI AG
Date: 19-08-2021
DOI: 10.3390/ELECTRONICS10162000
Abstract: Modern wireless networks such as 5G require multiband MIMO-supported Base Station Antennas. As a result, antennas have multiple ports to support a range of frequency bands leading to multiple arrays within one compact antenna enclosure. The close proximity of the arrays results in significant scattering degrading pattern performance of each band while coupling between arrays leads to degradation in return loss and port-to-port isolations. Different design techniques are adopted in the literature to overcome such challenges. This paper provides a classification of challenges in BSA design and a cohesive list of design techniques adopted in the literature to overcome such challenges.
Publisher: IEEE
Date: 27-12-2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2022
Publisher: IEEE
Date: 07-2011
Publisher: Springer International Publishing
Date: 2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2023
Publisher: IEEE
Date: 27-12-2022
Publisher: IEEE
Date: 12-2008
Publisher: IEEE
Date: 27-03-2022
Publisher: IEEE
Date: 21-12-2021
Publisher: IEEE
Date: 03-2012
Publisher: Elsevier BV
Date: 02-2020
Publisher: IEEE
Date: 03-2011
Publisher: IEEE
Date: 09-08-2021
Publisher: IEEE
Date: 15-11-2021
Publisher: MDPI AG
Date: 07-03-2023
DOI: 10.3390/S23062905
Abstract: 5G demands a significant increment in the number of connected devices. As a result, gNodeBs are constantly pushed to serve more spectrum and smaller sectors. These increased capacity demands are met by using multiband antennas in base stations. One of the key challenges with multiband antennas is the pattern distortions due to the presence of other surrounding antenna element structures. This work provides a novel approach to address the challenge of pattern distortion in the lower frequency band 690–960 MHz due to common-mode (CM) currents in the high- frequency-band antenna element operating in the 1810–2690 MHz band. A common-mode suppression circuit is integrated with the impedance matching network of the high-band antenna element to reduce these common-mode currents. The experimental results verified that the common-mode suppression circuit reduces the common-mode currents at low-band frequencies by moving the common-mode resonance frequency outside the low frequency band, resulting in cleaner low-band patterns meeting pattern specifications.
Start Date: 06-2023
End Date: 06-2026
Amount: $408,128.00
Funder: Australian Research Council
View Funded ActivityStart Date: 06-2024
End Date: 06-2027
Amount: $418,317.00
Funder: Australian Research Council
View Funded Activity