scholarly journals A Novel Linear Sparse Array with Reconfigurable Pixel Antenna Elements

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Ming Li ◽  
Haiping Wei ◽  
Jiahao Zhao ◽  
Qingchang Tao ◽  
Zheng You
Keyword(s):  
Phased Array ◽  
Beam Steering ◽  
Dielectric Substrate ◽  
Sidelobe Level ◽  
Beam Scanning ◽  
Sparse Array ◽  
Low Sidelobe ◽  
X Band ◽  
Application Potential ◽  
Slot Coupling

In this paper, on the basis of multifunctional reconfigurable pixel antenna (RPA) elements, a novel linear sparse array with an attractive compound reconfigurability is presented. It has the potential advantages of its beam scanning with low gain fluctuation, low sidelobe in two orthogonal planes, and polarization reconfigurable performance. Specifically, an RPA with simultaneous polarization and pattern reconstruction capabilities, consisting of the driven patch and the parasitic pixels on the same layer of dielectric substrate, is firstly designed, which can work in several operation modes corresponding to steerable beam directions θ=0°;θxoz=25°, 45°;θyoz=15° with two circular polarizations in X-band. Cross-slot coupling feed is used to improve polarization reconstruction capability and reduce the complexity of hybrid reconstruction topology optimization. Then, those RPAs are integrated into the 1×8 linear sparse array to realize the reconfiguration of two circular polarizations and beam steering in xoz- and yoz-plane. Simulation results show that the gain fluctuation and sidelobe level of the array during beam scanning have significant advantages over the previous phased array, and the generation of antenna grating lobes is avoided. Moreover, both RPA element and RPA array prototypes have been fabricated and measured to testify the efficiency. The measured results agree well with the simulated ones, which indicates the application potential in the field of modern wireless communication system of the proposed linear sparse array.

scholarly journals An X-Band CMOS Digital Phased Array Radar from Hardware to Software

Sensors ◽  
2021 ◽  
Vol 21 (21) ◽  
pp. 7382
Author(s):  
Yue-Ming Wu ◽  
Hao-Chung Chou ◽  
Cheng-Yung Ke ◽  
Chien-Cheng Wang ◽  
Chien-Te Li ◽  
...  
Keyword(s):  
Phased Array ◽  
Beam Steering ◽  
Cmos Technology ◽  
Oxide Semiconductor ◽  
Injection Technique ◽  
Element Level ◽  
Digital Beamforming ◽  
Phased Array Radar ◽  
X Band ◽  
Compact Size

Phased array technology features rapid and directional scanning and has become a promising approach for remote sensing and wireless communication. In addition, element-level digitization has increased the feasibility of complicated signal processing and simultaneous multi-beamforming processes. However, the high cost and bulky characteristics of beam-steering systems have prevented their extensive application. In this paper, an X-band element-level digital phased array radar utilizing fully integrated complementary metal-oxide-semiconductor (CMOS) transceivers is proposed for achieving a low-cost and compact-size digital beamforming system. An 8–10 GHz transceiver system-on-chip (SoC) fabricated in 65 nm CMOS technology offers baseband filtering, frequency translation, and global clock synchronization through the proposed periodic pulse injection technique. A 16-element subarray module with an SoC integration, antenna-in-package, and tile array configuration achieves digital beamforming, back-end computing, and dc–dc conversion with a size of 317 ×149 × 74.6 mm3. A radar demonstrator with scalable subarray modules simultaneously realizes range sensing and azimuth recognition for pulsed radar configurations. Captured by the suggested software-defined pulsed radar, a complete range–azimuth figure with a 1 km maximum observation range can be displayed within 150 ms under the current implementation.

scholarly journals An Improved Peak Sidelobe Reduction Method for Subarrayed Beam Scanning

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Hang Hu ◽  
Xuepeng Luan ◽  
Guanglei Zhang ◽  
Ke Song ◽  
Weihui Liu ◽  
...  
Keyword(s):  
Phased Array ◽  
Reduction Method ◽  
Ideal Space ◽  
Sidelobe Level ◽  
Beam Scanning ◽  
Array Pattern ◽  
Element Number ◽  
Sidelobe Level Reduction ◽  
Remarkable Reduction ◽  
Level Reduction

This paper focused on PSL (peak sidelobe level) reduction for subarrayed beam scanning in phased array radars. The desired GSP (Gaussian Subarray Patterns) are achieved by creating a subarray weighting network. The GSP-based method could reduce PSL of array pattern; compared with the method based on the desired subarray pattern which is defined by ideal space-domain filter, the PSL reduction performance is improved remarkably. Further, based on the concept adopting superelement patterns to approximately express original subarray patterns, the simplified GSP-based method is proposed. So the dimension of each matrix required for creating the weighting network, which was originally the same as the element number, could be reduced to the same as the subarray number. Consequently, we achieve remarkable reduction of the computation burden; simultaneously, the PSL mitigation performance is degraded slightly. Simulation results demonstrate the validity of the introduced methods.

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