Thesis
Wideband implantable antennas for wireless biomedical applications
Washington State University
Master of Science (MS), Washington State University
2014
Handle:
https://hdl.handle.net/2376/104562
Abstract
This thesis focuses on the design of wideband implantable antennas for biomedical applications. These antennas are used for data transmission in medical applications such as continuous health monitoring, cardiac pacemakers, cochlear implants, etc. The proposed antennas have potential to perform in various biological environments due to their high bandwidth. Design challenges include antenna miniaturization, bandwidth, impedance matching in an electrically lossy environment, biocompatibility, and limitations on specific absorption rate (SAR). Three antennas were designed and characterized in this study. The first antenna designed is a small size dual-wideband implantable antenna operating in the Medical Device Radiocommunications Service (MedRadio) (401 - 406 MHz) and Industrial, Scientific, and Medical (ISM) (2.4 - 2.48 GHz) bands. The proposed antenna has a 71.6% reduction in size with respect to the previous similar dual band implantable antenna. The simulated and measured -10 dB bandwidths are found to be 66% MedRadio, 40% ISM and 56% MedRadio, 33% ISM, respectively. The antenna is in vitro tested in a tissue mimicking gel approximating the electrical properties of human skin tissue. The second antenna designed is a compact wideband implantable antenna operating in the Wireless Medical Telemetry Service (WMTS) (1395 - 1400 MHz, 1427 - 1432 MHz) bands. The proposed antenna has a compact size of 8.7 mm x 5.05 mm x 1.27 mm. The simulated and measured -10 dB bandwidths are found to be 28% and 19%, respectively. The antenna is in vitro tested in a tissue mimicking solution. The third antenna is a dual band antenna for WMTS applications covering the frequency bands 608 - 614 MHz, 1395 - 1400 MHz, and 1427 - 1432 MHz. The designed antenna is a meandered dipole antenna with superstrate. It has size 17.6 mm x 12 mm x 2.54 mm. The simulated and measured -10 dB bandwidths are found to be 45.8% and 16.3% for the lower frequency band, and 12.4% and 10.6% in the upper frequency band. The antenna is in vitro tested in a tissue mimicking solution.
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Details
- Title
- Wideband implantable antennas for wireless biomedical applications
- Creators
- Johnny We Ung
- Contributors
- Tutku Karaçolak (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Electrical Engineering and Computer Science, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525111501842
- Language
- English
- Resource Type
- Thesis