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Sensing signals of a sensor in digestive tract
Raška, Marek ; Láčík, Jaroslav (referee) ; Raida, Zbyněk (advisor)
Wireless capsule endoscopy (WCE) is a system for capturing images of human digestive tract for medical purposes. The antenna is one of the most important parts of the system. In this report, I present a solution for a system operating in the 2.4 GHz and 915 MHz ISM band. The capsule transmitter contains a conformal loop antenna placed on its outer wall. The planar monopole with a partial ground is used as a receiver. The systems have been verified by numerical simulations with a phantom representing digestive tract. The transmitting modules have the bandwidth of several GHz according to simulations. This allows the antenna to tolerate various effects of living tissues. The receiving antennas have the bandwidth of hundreds of MHz. The path loss of the radio link between antennas operating in 2,4 GHz band is lower than 94 dB for any capsule orientation and location. This does not ensure a sufficient signal strength at the receiving antenna. In contrast, the system operating at 915 MHz ensures sufficient signal level at the receiver.
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Self-adhesive antennas for on-body communication
Punar, Jan ; Fiala, Pavel (referee) ; Raida, Zbyněk (advisor)
This project is focused on planar antennas for on body communication. Project follows the concept of a self-adhesive antenna, which was published in [1]. The included report contains simulation results of the designed antenna, and compares them with results given in [1]. It describes the redesign of the antenna to the operation frequency 5.8 GHz for substrate Arlon 25N followed by subsequent conversion to the thin substrate FR4. The thesis also deals with antennas not only for on body communication but also for communication between the human body and the remote unit. Finally, the work contains measurement results of the reference antenna on the Arlon 25N substrate.
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Sensing signals of a sensor in digestive tract
Raška, Marek ; Láčík, Jaroslav (referee) ; Raida, Zbyněk (advisor)
Wireless capsule endoscopy (WCE) is a system for capturing images of human digestive tract for medical purposes. The antenna is one of the most important parts of the system. In this report, I present a solution for a system operating in the 2.4 GHz and 915 MHz ISM band. The capsule transmitter contains a conformal loop antenna placed on its outer wall. The planar monopole with a partial ground is used as a receiver. The systems have been verified by numerical simulations with a phantom representing digestive tract. The transmitting modules have the bandwidth of several GHz according to simulations. This allows the antenna to tolerate various effects of living tissues. The receiving antennas have the bandwidth of hundreds of MHz. The path loss of the radio link between antennas operating in 2,4 GHz band is lower than 94 dB for any capsule orientation and location. This does not ensure a sufficient signal strength at the receiving antenna. In contrast, the system operating at 915 MHz ensures sufficient signal level at the receiver.
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Self-adhesive antennas for on-body communication
Punar, Jan ; Fiala, Pavel (referee) ; Raida, Zbyněk (advisor)
This project is focused on planar antennas for on body communication. Project follows the concept of a self-adhesive antenna, which was published in [1]. The included report contains simulation results of the designed antenna, and compares them with results given in [1]. It describes the redesign of the antenna to the operation frequency 5.8 GHz for substrate Arlon 25N followed by subsequent conversion to the thin substrate FR4. The thesis also deals with antennas not only for on body communication but also for communication between the human body and the remote unit. Finally, the work contains measurement results of the reference antenna on the Arlon 25N substrate.
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