A Simple and Effective Approach for Scattering Suppression in Multiband Base Station Antennas

Farasat, Madiha; Thalakotuna, Dushmantha; Hu, Zhonghao; Yang, Yang

doi:10.3390/electronics11213423

Cited by 3 publications

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The LB dipole impedance matching from 690–960 MHz is based on a feed network design that includes series, shunt resonators, and a quasi-quarter-wavelength transmission line (TL2). A circuit theory model of matching circuit and implementation is proposed in [ 15 ]. Both the HB and LB antenna elements achieved S11 < −10 dB across the frequency band of interest as shown in Figure 10 .…”

Section: Resultsmentioning

confidence: 99%

Suppression of Common-Mode Resonance in Multiband Base Station Antennas

Farasat

Thalakotuna

Yang

et al. 2023

Sensors

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

Suppression of Common-Mode Resonance in Multiband Base Station Antennas

Farasat

Thalakotuna

Yang

et al. 2023

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“… (a) Side‐view of an antenna‐element (Farasat et al., 2022), (b) Balun configuration (Yang et al., 2021). …”

Section: Bsa Design Challengesmentioning

confidence: 99%

A Survey of Five Generations of MIMO Multiband Base Station Antennas

2023

View full text Add to dashboard Cite

As telecommunication systems evolve, there is an increasing demand for multi‐band MIMO base‐station antennas. Antenna arrays are generally used to support multiple frequencies with multiple ports in a compact size. However, this can result in significant degradation in scattering patterns and return loss/port isolation due to the close proximity of the radiation from the array. Various techniques have been proposed in the literature to address these issues. This paper presents an overview of the challenges faced by base station antennas (BSAs) over time and their general solutions. With the technological advancements of communication systems, accompanied by high data rates, high‐frequency antenna designs and MIMO operations have been introduced at the base station level. Base station antennas encountered design challenges, including broad bandwidth, high isolation levels, stable half‐power beam width, beam squint reduction, high cross polarization discrimination (XPD), gain improvement, beam steering, compact size, and cost reduction. This survey provides information on the solutions adopted by researchers over time for each design challenge, with citations. Additionally, the authors discuss techniques developed to overcome these challenges, demonstrating the evolution of BSAs from the first to the fifth generation of telecommunication systems.

show abstract