Advancing Wireless Sensor Networks Performance over Radio Trigger Wake-up Capabilities

In this Paper, we enhance the performance of Wireless Sensor Networks (WSNs) by optimizing the Wake-up capabilities within a passive radio-triggered wakeup circuit and then used its applications to manage the power consumption of the WSNs. The architecture of our proposed circuit manages the radio power consumption of WSN by harvesting energy from the radio signals and making the radio-triggered hardware sends a wake-up signal to the microcontroller (MCU) of the node. This harvest process takes only 15μs or less to produce wake-up signals within the wake-up circuit and prolongs the lifetime of the WSN nodes. In addition, the proposed circuit receives the RF signal of the network controller through the antenna node and produces an output voltage (VOLDC) by its rectifier module so that this voltage produces direct current DC of 250 mV with the received power of 0.85uW (-13.85dBm). Most importantly, the proposed circuit can produce an output triggered voltage (VOLTG) by its module of LTC1540 –Nano-power Comparator which works as an amplifier (VOLDC) and only needs 0.3μA of energy for the setting of the threshold detector value within the long distance of 100m or more and radiation source of 2W in free-space. The simulation results demonstrate that the proposed circuit can produce VOLDC and VOLTG to trigger the wake-up signal of MCU within the long distance and low duty cycle as well as this circuit can identify the synchronization on WSNs

Autonomous Solar Powered Suborbital Satellite

We are going to Launch an autonomous CanSat that consists of a container and a payload. The payload will deploy from the container and will gently descend and safely land one raw hen egg. CanSat will be launched in a rocket then deployed from it at an altitude of about 670 meters or higher. Upon deployment from rocket, container and payload shall descend at 12 meters per second using any passive descent control system. At an altitude of 500 meters, the payload shall be released from the container. Payload will free fall with a descent rate of 10 meters per second or less. Temperature and pressure data will be collected every second in each of the payload and container. Power must be harnessed from the environment. Thin sheets of solar cells will be used to harvest energy. A three-axis accelerometer will be used to measure the stability and angle of descent of the payload during descent. Data will be sent from the transmitter in bursts and retrieved at the ground station through a transceiver. All data will be displayed in real time and saved on a computer in the ground station