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Miniaturized Antenna on a Paper Substrate

Abstract : This paper presents a miniaturized microstrip antenna on an air-filled paper substrate. The presence of air in the substrate accounts for low dielectric losses and a high dielectric thickness, resulting in a high radiation efficiency and a large bandwidth. In addition, the edge of the antenna is exploited to feed the antenna with a coplanar line that can be connected to a 50 coaxial probe. This original feeding technique permits the reduction of the frequency of resonance as the air gap increases. The antenna is further miniaturized with the insertion of a slot in the ground plane. As a result, a high degree of miniaturization can be obtained along with a high efficiency. The influence of the air gap and of the slot on the antenna's performances is investigated. Two prototypes with dimensions of 0.29 x 0.29 x 0.065 radiating at 2.45 GHz are fabricated with copper tape and silver ink and the antennas' performances are experimentally validated: a gain of 4.5 dBi and a front-to-back ratio of 9.5 dB are measured, corresponding to a radiation efficiency of 70%. Index Terms-Paper substrate, microstrip antenna, air gap, air-filled, miniaturization, light weight antenna, low cost.
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Contributor : Simon Hemour <>
Submitted on : Wednesday, April 1, 2020 - 12:48:37 PM
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E. Vandelle, Tan-Phu Vuong, Gustavo Ardila, Simon Hemour, Ke Wu. Miniaturized Antenna on a Paper Substrate. 2019 49th European Microwave Conference (EuMC), Oct 2019, Paris, France. pp.73-76, ⟨10.23919/EuMC.2019.8910815⟩. ⟨hal-02527675⟩



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