DocumentCode :
1332057
Title :
Wireless Orthopedic Pin for Bone Healing and Growth: Antenna Development
Author :
Zakavi, Parisa ; Karmakar, Nemai Chandra ; Griggs, Ian
Author_Institution :
Dept. of Electr. & Comput. Syst. Eng., Monash Univ., Monash, VIC, Australia
Volume :
58
Issue :
12
fYear :
2010
Firstpage :
4069
Lastpage :
4074
Abstract :
A slotted waveguide antenna, as part of a wireless battery system for a bone fixation implant called the Echidna Pin is proposed. The antenna has 3-dB beamwidth of 65° in both E- and H-planes and its gain is 7.7 dBi at 21 GHz. The proposed antenna is conformal to the body of the pin and uses the pin as a waveguide. It is shown that placing a small Perspex plate after the waveguide launcher allows satisfactory return loss performance at all resonant frequencies as the length of the waveguide changes. The pin is used in distraction osteogenesis and allows the distance between the two surgically broken pieces of bone to be changed, thus expanding both soft tissue and bone volume simultaneously. The wireless battery system allows reception of RF power and eliminates the need for daily manipulations on an externally fitted device, or an operation on the body to change the length of the pin. It also makes the treatment significantly less painful for the patient and reduces the risk of infection.
Keywords :
bone; orthopaedics; patient treatment; prosthetics; waveguide antennas; Echidna Pin; Perspex plate; antenna development; bone fixation implant; bone healing; bone volume; distraction osteogenesis; frequency 21 GHz; gain 7.7 dB; resonant frequencies; slotted waveguide antenna; soft tissue; waveguide launcher; wireless battery system; wireless orthopedic pin; Antenna measurements; Biomedical applications of radiation; Medical services; Resonant frequency; Slot antennas; Wireless communication; Biomedical applications of electromagnetic radiation; circular waveguides; implantable biomedical devices; loaded waveguides; slot arrays;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2010.2078459
Filename :
5582267
Link To Document :
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