Appling Weighted Thinned Linear Array and Pattern Reconfigurable Elements to Extend Pattern Scanning Range of Millimeter Wave Microstrip Phased Array

Bai, Yan-Ying; Xiao, Shaoqiu; Wang, Bing‐Zhong; Ding, Zhuofu

doi:10.1007/s10762-009-9559-6

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…For the merit of reducing the scan loss while maintaining a high gain, pattern reconfigurable elements have been proposed in ref. [22, 23]. In this approach, the radiation contribution of each element is relatively stable even at low elevation angles, by aligning the peak of reconfigurable pattern to be close to the peak value of the array factor.…”

Section: Introductionmentioning

confidence: 99%

Design of a phased array antenna with scan loss reduction and gain enhancement by using reconfigurable subarrays

Chu

Shao

Zhu

et al. 2022

IET Microwaves Antenna & Prop

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In order to reduce the scan loss and also obtain higher scanning gain for a phased array, a subarray design is proposed in this study. Different from the prior works, the number of active phase shifters utilised in this topology is identical to its counterpart without subarrays, which makes it more cost-effective. To achieve this valuable characteristic, a reconfigurable beam-former is proposed to enable the radiation pattern of a subarray to be switchable to different modes for different scanning regions. The proposed beamformer is based on substrate-integrated waveguide (SIW) and featured by extremely low-loss, due to its unique working mechanism. For validation, a fully integrated subarray module consisting of a beam-former and two Yagi-Uda antennas is designed and analysed. Furthermore, in order to show the effectiveness, five subarray modules with uniform spacing are utilised to construct a complete prototype operating at 15 GHz. Measurement results of the entire array indicate that the achieved gain is 2~3 dB higher than its counterpart without the subarray, from −45°to +45°in the beam-scanning plane. Meanwhile, the scan loss is decreased from �1.45 dB to smaller than �0.9 dB. Meanwhile, sidelobe levels are also improved for scanning angles between �45°. It should be pointed out that the proposed approach is also applicable to broaden the scanning angle of phased arrays with properly selected antenna elements. Since there is no need to increase the number of active phase shifters, this subarray-based approach can be considered more economic, and is very attractive for a variety of phased array systems.

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Section: Introductionmentioning

confidence: 99%

Design of a phased array antenna with scan loss reduction and gain enhancement by using reconfigurable subarrays

Chu

Shao

Zhu

et al. 2022

IET Microwaves Antenna & Prop

View full text Add to dashboard Cite

show abstract

“…微带阵列天线因其具有剖面低、易加工及易与载体共形等优点已成为相控阵天线的主流形式. 然而, 对于微带相控阵列天线而言, 其主波束扫描范围仅为 ± 50°, 且扫描过程中增益会下降4-5 dB [1] . 同时, 微带相控阵列天线的工作带宽在实际应用中也有很大问题.…”

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Wide-angle scanning linear phased arrays based on wide-beam magneto electric dipole antenna

Hao-Nan¹,

空军工程大学信息与导航学院²,

Cao³

et al. 2021

Acta Phys. Sin.

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Microstrip phased array has aroused interest of many researchers because of its beam agility. However, a big problem for typical microstrip array is that its main beam can only scan from about –50° to 50°, with a gain loss of 4-5 dB. Meanwhile, the relatively narrow operating bandwidth of microstrip antenna is also a problem in application. These flaws have dramatically limited its applications and spawned many studies on phased array with wide-angle scanning capability. Several methods have been proposed to broaden the scanning coverage of phased array, such as utilizing pattern-reconfigurable antenna as an element of array, taking wide-beam antenna as the element of array, and adopt metasurface as the top cladding of array. However, most of existing researches mainly focus on achieving wide-angle scanning performance within a relatively narrow bandwidth. A phased array that possesses wide-angle scanning capability at both main planes within a relatively wide bandwidth is highly desirable. In this paper, a wide-beam magnetoelectric (ME) dipole antenna is proposed. It consists of an ME dipole antenna in the form of microstrip patch and a pair of magnetic dipoles. Metallic through holes integrated with patches and ground are utilized to form magnetic currents. Extra magnetic dipoles are added to broaden the 3-dB beam-width. The simulated results reveal that the 3-dB beam-width of the proposed antenna is greater than 107° in the E-plane (9 GHz–12 GHz) and 178° in the H-plane (7 GHz–12 GHz) respectively. The impedance bandwidth of the proposed antenna is 53.26% from 7.3 GHz to 12.6 GHz (VWSR < 2). Based on the proposed antenna element, two linear phased arrays are fabricated and measured. To test the wide-angle scanning capability of the arrays, each antenna element is simply fed with alternating currents with identical amplitude and linearly increasing phases. The measured results reveal that the wide-angle scanning capability of H-plane array and E-plane array can be obtained from 9 GHz to 12 GHz. The scanning beam of the H-plane array can cover the range from -90° to 90°. The scanning beam of the E-plane array can cover the range from –70° to 70°. The impedance bandwidth of the central antenna is 27.03% for the H-plane array from 9.6 GHz to 12.6 GHz (active VWSR < 2.5) and 36.36% for the E-plane array from 9 GHz to 13 GHz (active VWSR < 2) respectively. Hence, the proposed method can be used as a reference for designing a wide-beam antenna and wide-angle scanning phased array and the designed phased arrays can be applied to X-band radar systems.

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A novel symmetric weighted thinned array with pattern reconfigurable antenna to achieve wide-angle scanning with low side lobe level

Fan

Xiao

Wang

2015

2015 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-A

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Appling Weighted Thinned Linear Array and Pattern Reconfigurable Elements to Extend Pattern Scanning Range of Millimeter Wave Microstrip Phased Array

Cited by 3 publications

References 8 publications

Design of a phased array antenna with scan loss reduction and gain enhancement by using reconfigurable subarrays

Design of a phased array antenna with scan loss reduction and gain enhancement by using reconfigurable subarrays

Wide-angle scanning linear phased arrays based on wide-beam magneto electric dipole antenna

A novel symmetric weighted thinned array with pattern reconfigurable antenna to achieve wide-angle scanning with low side lobe level

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