Frequency Continuously Tunable Patch-Slot Antenna With Wide-Angle Discrete Scanning and Optional Backward Radiation

You, Chang Jiang; Li, Peng Kai; Yang, Dan; Yao, Cong; Liu, Shu Han; Yin, Guangqiang

doi:10.1109/lawp.2021.3058973

Cited by 4 publications

(1 citation statement)

References 12 publications

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“…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. In literatures, element pattern can be reconfigured by employing tunable devices such as pin diodes [24], RF switches [25], varactors [26,27] multiple ports [28] and even active phase shifters [29].…”

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

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A single patch antenna with dual pairs of coupled modes forwide‐anglefrequency beam scanning

Zhang

Shi

2022

Int J RF Mic Comp-Aid Eng

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A single patch antenna with dual pairs of coupled modes to achieve frequency beam scanning from backward to forward is proposed. The dual pairs of coupled modes are the odd-and even-TM 10 and TM 11 modes, which are caused by one row of metal vias near the middle of the patch. When the operating frequency is between the odd-and even-TM 10 resonant frequencies, the beam scanning of the antenna is backward because of the positive phase difference between E x at the right and left edges. The forward beam scanning can be achieved between the odd-and even-TM 11 resonant frequencies due to the negative phase difference between E y at the right and left parts. Therefore, the beam-scanning angle can be expanded due to both backward and forward scanning. The measured results exhibit the 10-dB impedance matching bandwidth of 6.3% (2.32-2.47 GHz) and 3.5% (3.34-3.46 GHz) for the lower and upper bands, in which the beam peak scans from À45 to 0 and from +9 to +36 , respectively.

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Electronic Beam-Scanning Antennas

Koul,

Swapna,

Karthikeya

2024

Signals and Communication Technology

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Frequency Continuously Tunable Patch-Slot Antenna With Wide-Angle Discrete Scanning and Optional Backward Radiation

Cited by 4 publications

References 12 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

A single patch antenna with dual pairs of coupled modes forwide‐anglefrequency beam scanning

Electronic Beam-Scanning Antennas

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