Spatial Interference Reduction by Subarray Stacking in Large Two-Dimensional Antenna Arrays

Javed, Muhammad Yasir; Tervo, Nuutti; Leinonen, Marko E.; Pärssinen, Aarno

doi:10.1109/tap.2020.3044687

Cited by 8 publications

(4 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…8c,d) to the point that the main beam direction cannot be uniquely identified. The performance improvement exhibited by the mixed antenna element factor is also appealing in a multiusers scenario where a lowering of the average interference over the visible region is beneficial for an improved quality of service [44]. Fig.…”

Section: A Case 1: Maximum Steering Angle Of 0 = 60°mentioning

confidence: 99%

Analysis of Performance Enhancement of Clustered-Based Phased Arrays Employing Mixed Antenna Element Factor

Dicandia,

Genovesi

2024

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

A novel strategy for the design and optimization of large-scan phased arrays is proposed. Active electronically beamscanning antennas offer an unparalleled set of degrees of freedom, but they can be expensive, require complex radiofrequency frontends, a suitable thermal management and generally undergo a loss in directivity due to the pattern shape of the unit radiating element. A solution to these problems can be offered by an approach that reduces the number of transmit/receive modules (TRMs) and phase shifters (PSs) by a simple and fast clustering strategy based on Penrose tessellation that operates on the regular lattice of the radiating elements. More importantly, the proposed scheme adopts a mixed-mode element factor that proves to be effective in guaranteeing a remarkable scan efficiency and robustness with respect to array elements failures. The optimization process aims to maximize the minimum gain along the main beam during the scan as well as minimizing the peak sidelobe level (PSLL), while reducing the number of TRMs.

show abstract

Section: A Case 1: Maximum Steering Angle Of 0 = 60°mentioning

confidence: 99%

Analysis of Performance Enhancement of Clustered-Based Phased Arrays Employing Mixed Antenna Element Factor

Dicandia,

Genovesi

2024

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

show abstract

“…When the signal finally enters the generic m th subarray, its phase is further shifted by the phase-shifter corresponding to the selected branch of the subarray that performs the actual beamsteering. The selected center frequency of the phased array is 28 GHz [7], [8], [15], [16] and antenna spacing is d = λ0 2 [7], [8], [17], where λ 0 represents the nominal wavelength in free space.…”

Section: A System Modelsmentioning

confidence: 99%

“…In asymmetric scenarios, the physical lengths of the additional transmission lines correspond the distance between the subarrays, i.e., l T R = λ 0 [17]. The phase response of the ideal transmission line at frequency f can be written as…”

Section: A System Modelsmentioning

confidence: 99%

Impact of the Asymmetric Signal Routing on the Wideband Spatial Behavior of Large Modular Phased Arrays

Delfini

Tervo

Leinonen

et al. 2023

2023 17th European Conference on Antennas and Propagation (EuCAP)

Self Cite

View full text Add to dashboard Cite

Phased arrays have typically equal lengths for all antenna paths. This paper compares three phased array architectures for 5/6G applications. The first two arrays present unequallength feeding networks, while the third array is the corporatefed one. The first array is fed from the center, while the second is fed from the side. The impacts of the unsymmetrical feeding network on the bandwidths are analyzed and compared to the corporate-fed array. We show that side-fed arrays present higher bandwidths for higher steering angles, while center-fed arrays work better in the broadside region. Moreover, side-fed arrays can also be better than corporate-fed ones near the end-fire region, making them a good alternative to reduce the footprint of the feeding networks. Finally, we illustrate that if the feeding point can be varied as a function of the desired steering angle, the broadband performance of the array can be optimized for different steering angles.

show abstract

“…Tus, many papers have discussed the side lobe and proposed various methods to suppress it [16][17][18]. Tey mainly include optimizing the array by the optimization algorithm [19,20], improving the antenna structure [21,22], and superposing the radiation pattern to suppress the side lobe [23,24]. Te studies in [25] combines the metasurface with amplitude and phase controllable unit cell, and realize the side-lobe levels suppression of a metasurface lens.…”

Section: Introductionmentioning

confidence: 99%

Side Null Analysis of the Main-Auxiliary Antenna Array for Noncooperative Interference Cancellation

Li,

Zhang,

et al. 2023

International Journal of Antennas and Propagation

View full text Add to dashboard Cite

In interference cancellation, the null at the angle of arrival (AoA) of interference can suppress interference. However, due to the large spacing between array elements and the periodicity of the array, some small nulls at the angles of noninterference are formed inevitably. When the AoA of the desired signal is in these small nulls, they impair the effectiveness of interference cancellation by attenuating the desired signal. This paper proposes the concept of a side null to represent these nulls in the noninterference direction. And the cancellation ratio of the desired signal (SCR) is deduced to quantitatively characterize the side null. The spatial noncooperative interference cancellation model based on the main-auxiliary antenna array is established. Based on this, the SCR is derived to evaluate the amount of desired signal attenuation. Then the simulation, respectively, in two-dimensional plane and three-dimensional space, describes the side null visually. Moreover, the method of side null reduction is discussed by modulation of the array. Finally, the existence of side null and its influence on interference cancellation are verified through the experiments. The results of the simulation and experiment are in good agreement, and both support the theoretical analysis.

show abstract

Spatial Interference Reduction by Subarray Stacking in Large Two-Dimensional Antenna Arrays

Cited by 8 publications

References 42 publications

Analysis of Performance Enhancement of Clustered-Based Phased Arrays Employing Mixed Antenna Element Factor

Analysis of Performance Enhancement of Clustered-Based Phased Arrays Employing Mixed Antenna Element Factor

Impact of the Asymmetric Signal Routing on the Wideband Spatial Behavior of Large Modular Phased Arrays

Side Null Analysis of the Main-Auxiliary Antenna Array for Noncooperative Interference Cancellation

Contact Info

Product

Resources

About