access icon free 24-GHz Patch antenna array on cellulose-based materials for green wireless internet applications

A 24-GHz patch array antenna with integrated feeding network has been fabricated exploiting a multi-layer cellulose-based (i.e. paper) substrate. The adopted microstrip circuitry exploits a copper adhesive laminate that is shaped by a photo-lithographic process and transferred to the hosting substrate using a sacrificial layer. The multi-layer structure is obtained by stacking and gluing two layers of photo-paper with an interposed copper ground plane. The measurements show an input reflection coefficient of about −29 dB at the centre frequency, an operating bandwidth with S 11 ⩽ −20 dB of 540 MHz and a gain of 7.4 dBi. The estimated radiation efficiency is 35%. The proposed design shows the feasibility of low-cost antenna systems for green wireless internet technology and applications up to the boundary between microwaves and millimetre-waves.

Inspec keywords: copper; adhesives; antenna feeds; microwave antenna arrays; laminates; microstrip circuits; UHF antennas; antenna radiation patterns; microstrip antenna arrays; Internet; radio networks; electromagnetic wave reflection; environmental factors

Other keywords: input reflection coefflcient; bandwidth 540 MHz; photopaper; copper adhesive lamination; integrated feeding network; stacking; interposed copper ground plane; efficiency 35 percent; Cu; sacriflcial layer; multilayer cellulose-based material substrate; patch antenna array; frequency 24 GHz; microstrip circuitry; gluing; photolithographic process; green wireless Internet technology

Subjects: Antenna arrays; Other computer networks; Antenna accessories; Computer communications; Waveguide and microwave transmission line components; Radio links and equipment

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