Implantable slot antenna 4. CONCLUSION Miniaturized implantable slot antenna by embedding combination of meander & spiral slot is designed to operate at MICS band (402-405) MHz. The proposed antenna has measured compact dimensions of 8.8 X 15.2 X 1.27 mm. This implantable slot antenna has been developed for biotelemetry. The miniaturized spiral antenna operates from 350 MHz to 16 GHz, showing an ultrawideband behavior. With its use, it is determined that 98% of the harvested power comes from the mobile frequency bands. In particular, 82% of the total power belongs to 800 MHz and 900 MHz frequency bands. This paper proposes a compact spiral antenna with an improved bandwidth and miniaturized radiator for 3:1 (2-6 GHz) wideband antenna beamforming arrays. The proposed antenna is composed of an Archimedean spiral antenna (ASA) with an annular ring and additional dielectric substrates with a circular hole. The tradition compound planar spiral antenna cannot get good performance at low frequency by effects of the terminal reflection. In order to solve this problem, a novel compound planar spiral antenna by adding a peripheral structure is presented. Favorable miniaturization and wideband properties are shown in the simulation and measurement.

R Brinda and Sara S Preethy. Article: Miniaturized Antenna with Combination of Meander and Square Spiral Slots for Biomedical Applications. International Journal of Computer Applications 85(4):21-24, January 2014. Full text available. BibTeX

Abstract

The implantable medical devices (IMDs) are one of the most important advanced healthcare systems. Nowadays, the devices which are designed to monitor physiological data from inside the human body have great promises to provide major contributions to disease prevention, diagnosis and therapy thus reducing hospitalization terms and improving the patients' quality of life. It is recognized that modern wireless technology will play an important role in the biomedical application. Essential elements of implantable devices are antenna embedded in system contains Biosensors and interface circuits, which enable the exchange of data between implantable devices and external environment. In this paper, the implantable slot antenna which operates at MICS band (402-405 MHz) has been designed. This implantable antenna is a combination of meander slots and square spiral slots have been embedded for effective size reduction at a fixed frequency operation. Compared to traditional planar inverted-F antennas (PIFAs), the proposed antenna has advantages of good size reduction and also being easy to be optimized to the necessary resonance frequency. This design would fulfill the requirements of biocompatibility, miniaturization, patient safety, and high-quality communication with exterior equipment.

Miniaturized Compound Spiral Slot Antenna Combo

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Miniaturized Compound Spiral Slot Antenna Booster