Extremely compact EBG‐backed antenna for smartwatch applications in medical body area network. Issue 7 (20th March 2019)

• Record Type: Journal Article
• Authors: Rano, Dinesh; Hashmi, Mohammad
• Is Part Of: IET microwaves, antennas & propagation. Volume 13:Issue 7(2019)
• Page Start: 1031
• Page End: 1040
• Publication Date: 2019-03-20
• Subjects: antenna radiation patterns -- monopole antennas -- body area networks -- microstrip antenna arrays; lower resonant frequency -- adjacent fingers -- net inductance -- equivalent lumped circuit model -- surface current flow -- metal strips -- reflection phase response -- excellent resemblance -- polarisation stability -- reflection phase parameter -- plane wave -- MBAN frequency -- extremely compact EBG‐backed antenna -- smartwatch applications -- interdigital electromagnetic bandgap unit cell -- wearable applications -- medical body area network -- metallic strips -- IDE‐unit cell -- IDE‐based EBG array integrated monopole antenna -- electromagnetic bandgap structures -- MBAN band -- size 14.5 mm -- size 36.0 mm -- size 38.0 mm -- size 3.12 mm -- size 14.3 mm -- gain 5.3 dB; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2018.6021
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : This paper presents design of a compact interdigital electromagnetic band gap unit cell (IDE) for wearable applications in the medical body area network (MBAN) band. The uniqueness of the proposed cell is in its ability to achieve lower resonant frequency in spite of very compact size of 14.3 mm × 14.5 mm. The cell has adjacent fingers connected in such a way that the net inductance contributed by the metallic strips increases and this aids in the reduction of resonant frequency. An equivalent lumped circuit model supports the analysis of the proposed cell. The evaluation of the developed model is assessed by comparing the reflection phase response obtained from the circuit model and full wave analysis. The proposed design, even though slightly asymmetric, possess polarisation stability and this has been validated using the reflection phase parameter for a plane wave polarised along x ‐and y ‐axes. Subsequently, a reflector consisting of 2 × 2 IDE‐unit cell to be integrated with monopole antenna of overall size 36 mm × 38 mm × 3.12 mm is designed. The design exhibits a very good agreement between the experimental and the simulated results whereby it is able to provide gain and efficiency of 5.3 dB and 85% respectively at the MBAN frequency.