Qamar, M; Kapusuz, K Y; Carslake, L; Loh, T H; Thaha, M A; Alomainy, A (2025) Ultra-Compact Camera-Integrated Deep-Implanted Two-Port MIMO Antenna for High-Data-Rate Wireless Capsule Endoscopy. IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology, 9 (3). pp. 293-301. ISSN 2469-7249

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Abstract

This study proposes a high-performance, two-element camera-integrated antenna array that covers the [401-406] MHz range in medical device radio communications service (MedRadio) for integration inside of a capsule to set up a stable, high data-rate multiple-input multiple-output (MIMO) wireless communication link for wireless endoscopy. The overall dimensions of the fabricated MIMO antenna element are π× 1.125 ×1.49 mm3, and it comprises two stacked meandered resonators by guaranteeing a measured bandwidth of at least 7 MHz and minimum isolation between antenna elements of 41 dB. The calculated link budget analysis of the proposed antenna suggests that a high rate of 78 Mbps data transmission can be efficiently transmitted over a distance of 1.6 m when placed in a muscle tissue. 2 W/kg of specific absorption rate (SAR) results are achieved when the capsule device operates at a safe power level of 20 mW. To validate the MIMO performance, measurements have been performed, showing an envelope correlation coefficient (ECC) smaller than 0.001, diversity gain (DG) greater than 9.99 dB and channel capacity (CC) of 10 bps/Hz at 20 dB signal-to-noise ratio (SNR) in the complete frequency band of operation. To the best of our knowledge, this is the first ever camera-integrated MIMO antenna system operating at [401- 406] MHz MedRadio band, which which is simulated and measured inside an implantable device.

Item Type:	Article
Keywords:	Antennas, Biomedical applications of electromagnetic radiation, MIMO systems
Subjects:	Electromagnetics > Wireless Communications
Divisions:	Electromagnetic & Electrochemical Technologies
Identification number/DOI:	10.1109/JERM.2024.3501385
Last Modified:	12 Feb 2026 09:04
URI:	https://eprintspublications.npl.co.uk/id/eprint/10271