@article{10902/16630, year = {2019}, month = {12}, url = {http://hdl.handle.net/10902/16630}, abstract = {In this paper, the design, operational principle and experimental validation of an endfire antenna element that is inspired by the energy-focusing characteristics of graded-index optical fibre are presented. The antenna operates with a bandwidth of 1.5 GHz centred around 14 GHz. It has a gain of around 5.5 dBi along the band of interest and a good pattern stability over the band. The antenna derives its unique nature from the arrangement of the arc-shaped parasitics, that couple onto the antenna´s driver dipole. An electromagnetic refractive index retrieval mechanism is used to guide the placement of the parasitics to enhance the gain. In addition to the design principle, a parametric study of the main parameters and their influence on the antenna behaviour is presented. The antenna is a potential candidate for use in multi-user massive MIMO antenna arrays for 5G communications where space is premium and in antenna array applications where a low-profile antenna element with a high gain is a necessity.}, organization = {This work was supported by the 5G wireless project that has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 641985.}, publisher = {SpringerOpen}, publisher = {EURASIP Journal on Wireless Communications and Networking, 2019, 2019:181}, title = {Quasi-optics-inspired low-profile endfire antenna element}, author = {Basavarajappa, Vedaprabhu and Bedia Expósito, Beatriz and Cabria de Juan, Lorena and Basterrechea Verdeja, José}, }