Advances in microstrip and printed antennas [Reviews and Abstracts]

A. Glisson

doi:10.1109/map.1999.769694

Printed Antennas Tuned by Transversely Magnetized Ferrite Operating at a Novel Resonant Mode

PIERS Online ◽

10.2529/piers070220134719 ◽

2007 ◽

Vol 3 (8) ◽

pp. 1213-1216 ◽

Cited By ~ 2

Author(s):

Anestis Mavridis ◽

George Kyriacou ◽

J. N. Sahalos

Keyword(s):

Resonant Mode ◽

Printed Antennas

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Ultra-Wideband Dielectric Lens Antennas for Beamsteering Systems

International Journal of Antennas and Propagation ◽

10.1155/2019/6732758 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8

Author(s):

Renan Alves dos Santos ◽

Gabriel Lobão da Silva Fré ◽

Luís Gustavo da Silva ◽

Marcelo Carneiro de Paiva ◽

Danilo Henrique Spadoti

Keyword(s):

Antenna Array ◽

Ultra Wideband ◽

Printed Antennas ◽

Lens Antennas ◽

Dielectric Lens ◽

Dielectric Lenses

This paper presents a high-directivity ultra-wideband beamsteering antenna array. An innovative beamsteering system based on hemispherical dielectric lenses fed by a set of different printed antennas is proposed. Diversity of signals in different spatial positions can be radiated at the same time. A prototype was manufactured and characterized, operating in a bandwidth varying from 8 GHz to 12 GHz with gain up to 13 dBi.

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Sustainable roll-to-roll manufactured multi-layer smart label

The International Journal of Advanced Manufacturing Technology ◽

10.1007/s00170-021-07640-z ◽

2021 ◽

Author(s):

Liisa Hakola ◽

Elina Jansson ◽

Romain Futsch ◽

Tuomas Happonen ◽

Victor Thenot ◽

...

Keyword(s):

Electronic Waste ◽

Near Field ◽

Colour Change ◽

Pilot Scale ◽

Printed Antennas ◽

Free Paper ◽

Roll To Roll ◽

Final Yield ◽

Smart Label ◽

Dark Blue

AbstractSustainability in electronics has a growing importance due to, e.g. increasing electronic waste, and global and European sustainability goals. Printing technologies and use of paper as a substrate enable manufacturing of sustainable electronic devices for emerging applications, such as the multi-layer anti-counterfeit label presented in this paper. This device consisted of electrochromic display (ECD) element, NFC (near field communication) tag and circuitry, all fully roll-to-roll (R2R) printed and assembled on plastic-free paper substrate, thus leading to a sustainable and recyclable device. Our setup uses harvested energy from HF field of a smartphone or reader, to switch an electrochromic display after rectification to prove authenticity of a product. Our novelty is in upscaling the manufacturing process to be fully printable and R2R processable in high-throughput conditions simulating industrial environment, i.e. in pilot scale. The printing workflow consisted of 11 R2R printed layers, all done in sufficient quality and registration. The printed antennas showed sheet resistance values of 32.9±1.9 mΩ/sq. The final yield was almost 1500 fully printed devices, and in R2R assembly over 1400 labels were integrated with 96.5% yield. All the assembled tags were readable with mobile phone NFC reader. The optical contrast (ΔE*) measured for the ECDs was over 15 for all the printed displays, a progressive switching time with a colour change visible in less than 5 s. The smart tag is ITO-free, plastic-free, fully printed in R2R and has a good stability over 50 cycles and reversible colour change from light to dark blue.

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