RF telemetry system for an implantable bio-MEMS sensor

Approaches and Challenges of Engineering Implantable Microelectromechanical Systems (MEMS) Drug Delivery Systems for in Vitro and in Vivo Applications

“…Wireless power transmission has been demonstrated successfully and has a strong potential for powering implantable BioMEMS to increase operation time. Simons et al [15] have proposed a miniature inductor and a pick up antenna in order to wirelessly power a biosensor over short distances. Following this similar approach, Rao et al [32] have developed a method for powering a micropump for their BioMEMS device.…”

“…More specifically, we focus our discussion on the several major factors that impact the performance of implantable BioMEMS devices, namely, (i) drug reservoir size and loading volume [13,14], (ii) effective delivery method, (iii) operating time [15,16], (iv) controllability of the device [1] and (v) biocompatibility of the device [17]. Depending on the specific biological applications, the device must be carefully tailored for the personalized medicine used.…”

Near field radiation characteristics of implantable square spiral chip inductor antennas for bio-sensors

“…Consequently, development of wireless, versatile monitoring techniques for embedded bio-sensors are highly desirable. In previous work, the authors have studied thoroughly the fundamental components (i.e., the embedded as well as the hand-held subsystems) of a wireless telemetry system for BioSensors [4][5][6][7][8][9][10]. In this work, we present the experimental characterization of implantable square spiral chip inductor antennas (SSCIA) in free space.…”

Modeling of the near field coupling between an external loop and an implantable spiral chip antenna in biosensor systems

“…The capacitance C S represents the parasitic capacitance of the spiral and the tuning capacitance such as, the capacitance of the pressure sensor. As an example, for the spiral and the loop reported in prior publications by the authors [2], [3], the computed circuit element values using expressions in [9]- [11] are presented in Fig.4. The mutual coupling M is determined as explained in [10].…”

“…In addition, the data from these sensors have to be wirelessly transmitted and recorded. As an example, the progress to date in the development of an implantable biosensor system for monitoring pressure is presented in [2], [3]. In this paper, the near field coupling characteristics between the loop antenna in the external hand-held device and the square spiral antenna in the implanted sensor are presented.…”