Low profile tunable dipole antenna using BST varactors for biomedical applications
- Resource Type
- Conference
- Authors
- Cure, David; Weller, Thomas M.; Miranda, Felix A.; Price, Tony
- Source
- 2013 IEEE Antennas and Propagation Society International Symposium (APSURSI) Antennas and Propagation Society International Symposium (APSURSI), 2013 IEEE. :570-571 Jul, 2013
- Subject
- Fields, Waves and Electromagnetics
Dipole antennas
Frequency selective surfaces
Antenna measurements
Impedance
Varactors
Robustness
- Language
- ISSN
- 1522-3965
1947-1491
In this paper a 2.4 GHz low profile (λ/47) tunable dipole antenna is evaluated in the presence of a human core model (HCM) body phantom. The antenna uses a frequency selective surface (FSS) with interdigital barium strontium titanate (BST) varactor-tuned unit cells and its performance is compared to a similar low profile antenna that uses an FSS with semiconductor varactor diodes. The measured data of the antenna demonstrate tunability from 2.2 GHz to 2.55 GHz in free space and impedance match improvement in the presence of a HCM at different distances. This antenna has smaller size, lower cost and less weight compared to the semiconductor varactor diode counterpart.