Intrabody communication is one of the possible technologies for connecting sensor nodes and base stations in the BAN network. There are two ways of connecting the electrodes to the human body, depending on their position: galvanic and capacitive method. In capacitive method, the main path of the signal is realized through the human body, and the return path is realized by the capacitive connection between the electrodes, which can include the environment. In this master thesis, the theoretical basis relevant for the implemented system is given, as well as an overview of the research carried out so far. Emphasis is placed on receiver architectures in intrabody communication systems. The architecture of the system for measuring the power of the received signal is based on the buffer amplifier BUF602ID, logarithmic amplifier AD8310, microcontroller STM32WB55CG, Bluetooth antenna, and voltage regulator TPS73633. The result is a battery-powered signal strength meter realized on two printed circuit boards. The first printed circuit board is based on a buffer amplifier and is used to reduce the influence of the impedance between the receiving electrodes on the measurement results. The second printed circuit board is used as a received signal strength meter. Also, the firmware for data acquisition from the output of the logarithmic amplifier via the built-in analog-to-digital (AD) converter on the microcontroller was written. Firmware for connecting the board and a personal computer via Bluetooth has also been developed. Finally, the results of measuring the characteristics of the developed systems are presented, namely the measurement of the received signal power without the buffer amplifier board and the measurement of the received signal power with the buffer amplifier board connected between the source and the second printed circuit board.