TY - JOUR
T1 - A wideband spiral antenna for ingestible capsule endoscope systems
T2 - Experimental results in a human phantom and a pig
AU - Lee, Sang Heun
AU - Lee, Jaebok
AU - Yoon, Young Joong
AU - Park, Sangbok
AU - Cheon, Changyul
AU - Kim, Kihyun
AU - Nam, Sangwook
PY - 2011/6
Y1 - 2011/6
N2 - This paper presents the design of a wideband spiral antenna for ingestible capsule endoscope systems and a comparison between the experimental results in a human phantom and a pig under general anesthesia. As wireless capsule endoscope systems transmit real-time internal biological image data at a high resolution to external receivers and because they operate in the human body, a small wideband antenna is required. To incorporate these properties, a thick-arm spiral structure is applied to the designed antenna. To make practical and efficient use of antennas inside the human body, which is composed of a high dielectric and lossy material, the resonance characteristics and radiation patterns were evaluated through a measurement setup using a liquid human phantom. The total height of the designed antenna is 5 mm and the diameter is 10 mm. The fractional bandwidth of the fabricated antenna is about 21 with a voltage standing-wave ratio of less than 2, and it has an isotropic radiation pattern. These characteristics are suitable for wideband capsule endoscope systems. Moreover, the received power level was measured using the proposed antenna, a circular polarized receiver antenna, and a pig under general anesthesia. Finally, endoscopic capsule images in the stomach and large intestine were captured using an onoff keying transceiver system.
AB - This paper presents the design of a wideband spiral antenna for ingestible capsule endoscope systems and a comparison between the experimental results in a human phantom and a pig under general anesthesia. As wireless capsule endoscope systems transmit real-time internal biological image data at a high resolution to external receivers and because they operate in the human body, a small wideband antenna is required. To incorporate these properties, a thick-arm spiral structure is applied to the designed antenna. To make practical and efficient use of antennas inside the human body, which is composed of a high dielectric and lossy material, the resonance characteristics and radiation patterns were evaluated through a measurement setup using a liquid human phantom. The total height of the designed antenna is 5 mm and the diameter is 10 mm. The fractional bandwidth of the fabricated antenna is about 21 with a voltage standing-wave ratio of less than 2, and it has an isotropic radiation pattern. These characteristics are suitable for wideband capsule endoscope systems. Moreover, the received power level was measured using the proposed antenna, a circular polarized receiver antenna, and a pig under general anesthesia. Finally, endoscopic capsule images in the stomach and large intestine were captured using an onoff keying transceiver system.
KW - Biotelemetry
KW - capsule endoscope
KW - endoscopic capsule images
KW - human phantom
KW - wideband spiral antenna
UR - http://www.scopus.com/inward/record.url?scp=79956355269&partnerID=8YFLogxK
U2 - 10.1109/TBME.2011.2112659
DO - 10.1109/TBME.2011.2112659
M3 - Article
C2 - 21317074
AN - SCOPUS:79956355269
SN - 0018-9294
VL - 58
SP - 1734
EP - 1741
JO - IEEE Transactions on Biomedical Engineering
JF - IEEE Transactions on Biomedical Engineering
IS - 6
M1 - 5710972
ER -