Naslov
Antennas for implants: design and limitations

Autori
Skrivervik, Anja ; Bosiljevac, Marko ; Šipuš, Zvonimir

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni

Knjiga
Bioelectromagnetics in Healthcare

Urednik/ci
Whittow, William

Izdavač
The Institution of Engineering and Technology (IET)

Grad
London : Delhi

Godina
2022

Raspon stranica
73-105

ISBN
978-1-83953-349-5

Ključne riječi
implantable antennas, fundamental limits, key performance indicators, total radiated power, maximum power density, measurement of small antennas

Sažetak
Wireless communication with an implanted sensor represents a huge challenge due to the large losses in the link. A key element in such a system is the implanted antenna, which has an important impact on the global efficiency of the communication link. The design of implantable antennas presents two main challenges: first, the miniaturization, as the available space in an implantable capsule is usually much smaller than the wavelength. Second, the antenna radiates into a lossy environment, which is very different from the lossless free space environment we know from classic antenna theory. This has a deep impact not only on the link performance but also more fundamentally on the way antenna radiation performance is described and on the bounds on the performance of these antennas. In this chapter, we will gain insight into the main fundamental differences between classic electrically small antennas and implantable antennas. We will then study some canonical cases to understand the loss mechanisms and propose certain physical bounds on the efficiency of implantable antennas. Based on these results, we will propose design rules, illustrated by realistic examples. Finally, we will discuss issues linked to the measurement of implantable antennas.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA