Abstract
In this paper, two printed coil antennas for wireless capsule endoscopic (WCE) communication system are proposed. Diagnostic images taken by WCE cameras are sent to an external device and displayed simultaneously. Two resonant frequencies of the proposed antenna are 38.5 and 57.6 MHz. Due to low resonant frequency, signal attenuation inside human body can be decreased, compared to a WCE antenna operating at Medical Implant Communication Systems (MICS) band (402–405 MHz). The receiving antenna size is 64×64×1.6 mm3, and the transmitting antenna is 10 mm in diameter and 2 mm thick. A human equivalent phantom is used to evaluate the influence of human body. In addition, the communication link sensitivity with different locations, orientations and misalignments are discussed.
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