Performance Analysis of Joint Base-Station Multiantenna Multibeam and Channel Assignment Scheme for Hierarchical Cellular System

Yang, Peng; Liu, Dou; Zhang, Yan

doi:10.1155/2014/216890

Cited by 2 publications

(2 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Multibeam array antennas play an important role in enhancing system capacity. This antenna also improves network coverage and reduces co-channel interference [5,8]. Figure 1 illustrates a multibeam base station with each radiation beam assigned to one mobile user.…”

Section: Introductionmentioning

confidence: 99%

Design and characterization of a compact single-layer multibeam array antennausing an 8×8 Butler matrix for 5G base station applications

Idrus¹,

Latef²,

Aridas³

et al. 2020

Turk J Elec Eng & Comp Sci

View full text Add to dashboard Cite

A multibeam array antenna employing a Butler matrix is a promising solution for fifth generation (5G) base stations. Due to inaccurate phase differences between output ports in the Butler matrix, the radiation characteristics could show incorrect main beam directions. In addition, the literature has also reported the issue of high amplitude imbalance in the Butler matrix. This paper presents a single-layer multibeam array antenna fed by an 8 × 8 Butler matrix operating at 28 GHz for 5G base station applications-a more cost-effective solution for large-scale production.The Butler matrix consists of twelve quadrature hybrids, sixteen crossovers, and eight phase shifters. This circuit was integrated with eight antenna elements at the output ports of the Butler matrix. The proposed multibeam array antenna was fabricated using a low dielectric constant and a low loss tangent substrate. The dimensions of the multibeam array antenna were 88 × 106 × 0.254 mm 3 . The Butler matrix achieved low insertion losses and low phase error with average values of 2.5 dB and less than ±10 • at 28 GHz, respectively. The measured return losses were less than −10 dB at 28 GHz. The measured radiation patterns were obtained and eight main beams were pointed at ±6 • , ±18 • , ±30 • , and ±44 • with measured gains between 9 dBi and 14 dBi.

show abstract

Section: Introductionmentioning

confidence: 99%

Design and characterization of a compact single-layer multibeam array antennausing an 8×8 Butler matrix for 5G base station applications

Idrus¹,

Latef²,

Aridas³

et al. 2020

Turk J Elec Eng & Comp Sci

View full text Add to dashboard Cite

show abstract

“…The multibeam array antenna is the most promising candidate for the 5G base station, as it reduces the co-channel interference by controlling the beam directions and improving network coverage [5, 8]. To achieve the multibeam characteristic, beamforming circuits such as the Butler matrix, the Rotman lens and the Blass matrix can be employed in the base station antenna [9–11].…”

Section: Introductionmentioning

confidence: 99%

A low-loss and compact single-layer butler matrix for a 5G base station antenna

et al. 2019

View full text Add to dashboard Cite

Researchers are increasingly showing interest in the application of a Butler matrix for fifth-generation (5G) base station antennas. However, the design of the Butler matrix is challenging at millimeter wave because of the very small wavelength. The literature has reported issues of high insertion losses and incorrect output phases at the output ports of the Butler matrix, which affects the radiation characteristics. To overcome these issues, the circuit elements of the Butler matrix such as the crossover, the quadrature hybrid and the phase shifter must be designed using highly accurate dimensions. This paper presents a low-loss and compact single-layer 8 × 8 Butler matrix operating at 28 GHz. The optimum design of each circuit element is also demonstrated in detail. The designed Butler matrix was fabricated to validate the simulated results. The measured results showed return losses of less than −10 dB at 28 GHz. The proposed Butler matrix achieved a low insertion loss and a low phase error of ± 2 dB and ± 10°, respectively. In sum, this work obtained a good agreement between the simulated and measured results.

show abstract

Performance Analysis of Joint Base-Station Multiantenna Multibeam and Channel Assignment Scheme for Hierarchical Cellular System

Cited by 2 publications

References 32 publications

Design and characterization of a compact single-layer multibeam array antennausing an 8×8 Butler matrix for 5G base station applications

Design and characterization of a compact single-layer multibeam array antennausing an 8×8 Butler matrix for 5G base station applications

A low-loss and compact single-layer butler matrix for a 5G base station antenna

Contact Info

Product

Resources

About