T. B. Tang et al., "Toward a miniature wireless integrated multisensor microsystem for industrial and biomedical applications, " IEEE Sensors J., vol. 2, no. 6, pp. 628-635, Dec. 2002.
T. B. Tang et al., "IDEAS: Aminiature lab-in-a-pill multisensormicrosystem, " in Proc. IEEE NORCHIP Conf., Copenhagen, Denmark, 2002, pp. 329-334.
K. Morimoto and H. Suzuki, "Micro analysis system for pH and protease activities with an integrated sample injection mechanism, " Biosensors Bioelectron., vol. 22, no. 1, pp. 86-93, Jul. 2006.
K. Kalantar-zadeh et al., "Intestinal gas capsules: A proof-of-concept demonstration, " Gastroenterology, vol. 150, no. 1 pp. 37-39, Jan. 2016.
C. Mc Caffrey, O. Chevalerias, C. O'Mathuna, and K. Twomey, "Swallowable-capsule technology, " IEEE Pervasive Comput., vol. 7, no. 1, pp. 23-29, Jan.-Mar. 2008.
M. R. Yuce and T. Dissanayake, "Easy-to-swallow wireless telemetry, " IEEE Microw. Mag., vol. 13, no. 6, pp. 90-101, Sep./Oct. 2012.
H. Cao et al., "An implantable, batteryless, and wireless capsule with integrated impedance and pH sensors for gastroesophageal refluxmonitoring, " IEEE Trans. Biomed. Eng., vol. 59, no. 11, pp. 3131-3139, Nov. 2012.
SmartPill motility testing system fromGiven Imaging Ltd., 2006. [Online] Available: http://www. givenimaging. com/en-int/Innovative-Solutions/Motility/SmartPill/Pages/default. aspx, Accessed on: Mar. 30, 2017.
E. A. Johannessen, L. Wang, C. Wyse, D. R. S. Cumming, and J. M. Cooper, "Biocompatibility of a lab-on-a-pill sensor in artificial gastrointestinal environments, " IEEE Trans. Biomed. Eng., vol. 53, no. 11, pp. 2333-2340, Nov. 2006.
F. Xu, G. Yan, K. Zhao, L. Lu, J. Gao, and G. Liu, "A wireless capsule system with ASIC for monitoring the physiological signals of the human gastrointestinal tract, " IEEE Trans. Biomed. Circuits Syst., vol. 8, no. 6, pp. 871-880, Dec. 2014.
P. A. Hammond, D. Ali, and D. R. S. Cumming, "A system-on-chip digital pH meter for use in a wireless diagnostic capsule, " IEEE Trans. Biomed. Eng., vol. 52, no. 4, pp. 687-694, Apr. 2005.
K. Zhao, G. Yan, L. Lu, and F. Xu, "Low-power wireless electronic capsule for long-term gastrointestinal monitoring, " J. Med. Syst., vol. 39, no. 2, p. 9, Feb. 2015.
G. Pan and L. Wang, "Swallowable wireless capsule endoscopy: progress and technical challenges, " Gastroenterol. Res. Pract., vol. 2012, Oct. 2012, Art. no. 841691.
A. Arshak et al., "Review of the potential of a wireless MEMS and TFT microsystems for the measurement of pressure in the GI tract, " Med. Eng. Phys., vol. 27, no. 5, pp. 347-358, Jun. 2005.
S. Schostek et al., "Telemetric real-time sensor for the detection of acute upper gastrointestinal bleeding, " Biosensors Bioelectron., vol. 78, pp. 524-529, Apr. 2016.
P. Valdastri, A. Menciassi, A. Arena, C. Caccamo, and P. Dario, "An implantable telemetry platform system for in vivo monitoring of physiological parameters, " IEEE Trans. Inf. Technol. Biomed., vol. 8, no. 3, pp. 271-278, Sep. 2004.
E. A. Johannessen et al., "An ingestible electronic pill for real time analytical measurement of the gastro-intestinal tract, " in Micro Total Analysis Systems. Dordrecht, The Netherlands: Springer-Verlag, 2002, pp. 181-183.
R. S. Mackay and B. Jacobson, "Endoradiosonde, " Nature, vol. 179, no. 4572, pp. 1239-1240, May 1957.
V. K. Zworykin, "A radio pill, " Nature, vol. 179, no. 4566, p. 898, Jun. 1957.
S. Kumar, "The effect of sustained spinal load on intra-abdominal pressure and EMG characteristics of trunk muscles, " Ergonomics, vol. 40, no. 12, pp. 1312-1334, Dec. 1997.
P. N. Cutchis, A. F. Hogrefe, and J. C. Lesho, "The ingestible thermal monitoring system, " Johns Hopkins APL Tech. Dig., vol. 9, pp. 16-21, 1988.
K. Arshak, E. Jafer, G. Lyons, D. Morris, and O. Korostynska, "A review of low-power wireless sensor microsystems for biomedical capsule diagnosis, " Microelectron. Int., vol. 21, no. 3, pp. 8-19, 2004.
J. E. Pandolfino, J. E. Richter, T. Ours, J. M. Guardino, J. Chapman, and P. J. Kahrilas, "Ambulatory esophageal pH monitoring using a wireless system, " Amer. J. Gastroenterol., vol. 98, no. 4, pp. 740-749, Apr. 2003.
P. Mostafalu and S. Sonkusale, "Flexible and transparent gastric battery: Energy harvesting from gastric acid for endoscopy application, " Biosensors Bioelectron., vol. 54, pp. 292-296, Apr. 2014.
B. Lenaerts and R. Puers, "An inductive power link for a wireless endoscope, " Biosensors Bioelectron., vol. 22, no. 7, pp. 1390-1395, Feb. 2007.
R. R. Richardson, J. A. Miller, andW. M. Reichert, "Polyimides as biomaterials: Preliminary biocompatibility testing, " Biomaterials, vol. 14, no. 8, pp. 627-635, Jul. 1993.
P. Starr, C. M. Agrawal, and S. Bailey, "Biocompatibility of common polyimides with human endothelial cells for a cardiovascular microsensor, " J. Biomed. Mater. Res. A, vol. 104, no. 2, pp. 406-412, Feb. 2016.
M. S. Arefin, M. B. Coskun, T. Alan, J.-M. Redoute, A. Neild, and M. R. Yuce, "A microfabricated fringing field capacitive pH sensor with an integrated readout circuit, " Appl. Phys. Lett., vol. 104, no. 22, Jun. 2014, Art. no. 223503.
M. S. Arefin, M. B. Coskun, T. Alan, J. M. Redoute, A. Neild, and M. R. Yuce, "A MEMS capacitive pH sensor for high acidic and basic solutions, " in Proc. IEEE Sensors Conf., Valencia, Spain, Nov. 2-5, 2014, pp. 1792-1794.
M. S. Arefin, J.-M. Redoute, andM. R. Yuce, "A MEMS interface IC with low-power and wide-range frequency-to-voltage converter for biomedical applications, " IEEE Trans. Biomed. Circuits Syst., vol. 10, no. 2, pp. 455-466, Apr. 2016.
M. S. Arefin, J.-M. Redoute, and M. R. Yuce, "A low-power and widerange MEMS capacitive sensors interface IC using pulse-width modulation for biomedical applications, " IEEE Sensors J., vol. 16, no. 17, pp. 6745-6754, Sep. 2016.
M. S. Arefin, J.-M. Redoute, and M. R. Yuce, "Meandered conformal antenna for ISM-band ingestible capsule communication systems, " in Proc. IEEE 38th Annu. Int. Conf. Eng. Med. Biol. Soc., Orlando, FL, USA, Aug. 16-20, 2016, pp. 3031-3034.
Silicon labs microcontroller with transceiver Si1064. [Online]. Available: https://www. silabs. com/Support%20Documents/TechnicalDocs/Si106x-8x. pdf, Accessed on: Mar. 30, 2017.
T. C. Martinsen, K. Bergh, and H. L. Waldum, "Gastric juice: A barrier against infectious diseases, " Basic Clin. Pharmacol. Toxicol., vol. 94, no. 2, pp. 94-102, Feb. 2005.
Y. Kim, G. Lee, S. Park, B. Kim, J.-O. Park, and J.-H. Cho, "Pressure monitoring system in gastro-intestinal tract, " in Proc. IEEE Int. Conf. Robot. Autom., Apr. 18-22, 2005, pp. 1321-1326.
Microfab packaged pressure sensor Die E1. 3N. [Online]. Available: http://www. microfab. de/mems/pressuresensors/pressuresensorpackageddie/, Accessed on: Mar. 30, 2017.
Honeywell NTC thermistor 100 K? bead 192-104QET-A01. [Online]. Available: http://sensing. honeywell. com/192-104QET-A01-Discrete-Thermistors/, Accessed on: Mar. 30, 2017.
H. Wang, C.-C. Weng, and A. Hajimiri, "Phase noise and fundamental sensitivity of oscillator-based reactance sensors, " IEEE Trans. Microw. Theory Techn., vol. 61, no. 5, pp. 2215-2229, May 2013.
A. Kiourti, K. A. Psathas, and K. S. Nikita, "Implantable and ingestible medical devices with wireless telemetry functionalities: A review of current status and challenges, " Bioelectromagnetics, vol. 35, no. 1, pp. 1-15, Jan. 2014.
M. R. Yuce, T. Dissanayake, and H. C. Keong, "Wireless telemetry for electronic pill technology, " in Proc. IEEE Sensors Conf., Oct. 2009, pp. 1433-1438.
Johanson technology 433 MHZ impedance matched balun and band-pass filter SMD passive (0433BM41A0019). [Online]. Available: http://www. johansontechnology. com/datasheets/chipset-specific/0433BM41A0019. pdf/, accessed on Mar. 30, 2017.
Dow corning 3145 RTV-clear MIL-A-46146 adhesive/sealant. [Online]. Available: http://www. dowcorning. com/applications/search/default. aspx? R=146EN, Accessed on: Mar. 30, 2017.
Silicon labs single-chip USB to UART bridge CP2102. [Online]. Available: https://www. silabs. com/Support%20Documents/TechnicalDocs/CP2102-9. pdf, Accessed on: Mar. 30, 2017.
L. Xu, M. Q-H. Meng, H. Ren, and Y. Chan, "Radiation characteristics of ingestible wireless devices in human intestine following radio frequency exposure at 430, 800, 1200, and 2400 MHz, " IEEE Trans. Antennas Propag., vol. 57, no. 8, pp. 2418-2428, Aug. 2009.
L. S. Xu, M. Q. H. Meng, and C. Hu, "Effects of dielectric values of human body on specific absorption rate following 430, 800, and 1200 MHz RF exposure to ingestible wireless device, " IEEE Trans. Inf. Technol. Biomed., vol. 14, no. 1, pp. 52-59, Jan. 2010.