A multilayer and lightweight conformal antenna (MLWCA) is demonstrated using a U-slotted patch and stacked polyimide films. The antenna consists of a rectangular patch with a U-shaped slot placed above the stacked Kapton polyimide (KPM) and transparent polyester plastic film (TPPF), which provides enhanced bandwidth (BW) and bending performance. The antenna has a bandwidth from 1.18 GHz to 1.36GHz(14.1%) with a maximum gain of 8.0 dBi at 1.27 GHz.

The antenna is designed and analyzed for the flat case and conformed along the x – and y-axis to cylinders with a radius of 200,160,100, and 80 mm.

Researcher/Author: 

Dr.Mohammad Ameen and Prof Koen Mouthaan

Published in: 2024 IEEE 12th Asia-Pacific Conference on Antennas and Propagation (APCAP)

Added to IEEE Xplore, 20 Feb 2025

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DOI:  10.1109/APCAP62011.2024.10881976

For system-technology co-design (STCO) of BEOL compatible beyond-Silicon heterogeneously integrated (Oxide & 2D material) materials, we investigated the monolithic 3D integration of vertically stacked 1T1R and 2T0C1R DRAM-RRAM hybrid memory array with IGZO FETs and MoS2 analog RRAMs for low voltage switching. Our wafer-scale process (<400∘C) demonstrates good device performance. The ITO-enhanced IGZO selecting transistors (Ion=196.5μA/μm,Ioff =1pA/μmatVd=1V) integrated with solution deposited MoS2 switching layer (3.6 nm), enable 1T1R memory cells with programming current <100μA and voltage <1V, compatible with CMOS logic core voltages.

Furthermore, to address RRAMs endurance limitations, we propose an ultra-compact vertically stacked 2T0C1R gain cell DRAM-RRAM hybrid using dual-gated IGZO FET. We also propose an all-IGZO buffer capable of 3D BEOL data pipelining for concurrent multi-stacked array operations. Such 3D analog compute-in-memory architecture significantly reduces ADC energy overheads, achieving 121 TOPS/W efficiency and 4.73 TOPS throughput.

Researcher/Author: 

Dr. Baoshan Tang, Dr. Zihang Fang, Dr. Ruyue Wan, Dr. Sonu Hooda, Dr. Jin Feng Leong, Dr. Quanzhen Wan, Dr ChunKuei Chen, Dr Evgeny Zamburg, Dr JoongSik Kim and Prof Aaron Thean

Published in: 2024 IEEE International Electron Devices Meeting (IEDM)

Added to IEEE Xplore, 18 Feb 2025

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DOI: 10.1109/IEDM50854.2024.10873575

An L-band 4×4 dual-polarization array with full digital receiving beamforming using two synchronized radio frequency system-on-chip (RFSoC) is presented. The array has 32 dipoles, 16 for each polarization, connected to the 2×16 channels of the two RFSoCs. The constituting element for the array are two dipoles placed orthogonal to each other.

Details of the dipoles, the antenna array, the synchronized RFSoCs, and the calibration are provided. The digital beamformer is first compared with an analog beamformer for measured boresight patterns. Subsequently, digital beamsteering is demonstrated in elevation. The array provides the building block for larger arrays with application in synthetic aperture radar (SAR).

Researcher/Author: 

Dr. Peizhou Yang, Dr Gong Chen and Prof Koen Mouthaan

Published in:  2024 IEEE Asia-Pacific Microwave Conference (APMC)

Added to IEEE Xplore, 13 Feb 2025

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DOI:  10.1109/APMC60911.2024.10867535

A compact, lightweight, and flexible array antenna for L-band applications is presented. The antenna consists of a primary patch and two parasitic patches using corrugated copper-cladded polyimide (CCPM) films, which provide excellent bending performance.

A single antenna with high bending capability is developed first. This element is used to demonstrate a 1×4 linear array. The antenna has a bandwidth from 1.18 GHz to 1.26 GHz with a maximum gain of 14.6 dBi at 1.22 GHz. The antenna array is analyzed and measured for the flat case as well cylindrical cases with radius of 400, 300, 200, and 160 mm.

Researcher/Author: 

Dr.Mohammad Ameen and Prof Koen Mouthaan

Published in: 2024 International Symposium on Antennas and Propagation (ISAP)

Added to IEEE Xplore, 23 Jan 2025

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DOI: 10.1109/ISAP62502.2024.10846435

A multilayer conformal dual-polarized antenna (ML-CDPA) with bending performance in all directions is presented. The antenna consists of a supporting ground plane and four identical radiating elements. Each element comprises two semi-elliptical-shaped polyimide films with patches stacked together to achieve 20% bandwidth.

The ML-CDPA is designed for L-band and tested for the flat case as well as conformed to a cylinder with 200 mm, 160 mm, 150 mm, 100 mm, and 80 mm radius.

Researcher/Author: 

Dr.Mohammad Ameen and Prof Koen Mouthaan

Published in: 2024 International Symposium on Antennas and Propagation (ISAP)

Added to IEEE Xplore, 23 Jan 2025

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DOI: 10.1109/ISAP62502.2024.10846054

A highly conformable, foldable, and deployable double-arch-shaped array (DASA) is presented. The antenna is made lightweight by combining polytetrafluoroethylene (PTFE) film and strips of polyethylene foam (PF-4). A single conformable antenna (SCA) at L-band is first presented.

The SCA is used for the design of a 1×4 linear array, which is deployable and can be completely conformed to a cylinder with radius R = 40 mm. In the planar form, the antenna provides a 10-dB return loss bandwidth from 1.20-1.31 GHz (9.4%) with a gain of 14.8 dBi at 1.25 GHz. The array is measured for the flat case and conformed to cylinders ranging in radius from 900 mm to 200 mm.

Researcher/Author: 

Dr.Mohammad Ameen and Prof Koen Mouthaan

Published in:  

Added to IEEE Xplore, 13 Feb 2025

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DOI: 10.1109/APMC60911.2024.10867626