No / This letter investigates the feasibility of designing a high gain on-chip antenna on silicon technology for subterahertz applications over a wide-frequency range. High gain is achieved by exciting the antenna using an aperture fed mechanism to couple electromagnetics energy from a metal slot line, which is sandwiched between the silicon and polycarbonate substrates, to a 15-element array comprising circular and rectangular radiation patches fabricated on the top surface of the polycarbonate layer. An open ended microstrip line, which is orthogonal to the metal slot-line, is implemented on the underside of the silicon substrate. When the open ended microstrip line is excited it couples the signal to the metal slot-line which is subsequently coupled and radiated by the patch array. Measured results show the proposed on-chip antenna exhibits a reflection coefficient of less than-10 dB across 0.290-0.316 THz with a highest gain and radiation efficiency of 11.71 dBi and 70.8%, respectively, occurred at 0.3 THz. The antenna has a narrow stopband between 0.292 and 0.294 THz. The physical size of the presented subterahertz on-chip antenna is 20 × 3.5 × 0.126 mm3.

Bird feeding is somthing most are familiar with, either when children are feeding the swans or adults using some type of bird feeder in the garden. This project took that as inspiration to create something that automatically feed the birds while also monitoring them by capturing a picture and sending out this information as a teet on Twitter. This thesis examined if it was possible to connect different components relatively simple in order to create something more advanced. Research of the components was the first step in order to ensure the ability to create such a product. The following components were used, a Raspberry Pi 3 b+, Raspberry Pi camera module, IKEA PIR sensor, zigbee USB dongel, ultrasonic sensor and a micro servo motor. These components were connected to the Raspberry Pi and tested individually to ensure quality and function. When successfully tested, implementing them together was done and later construction of the mounting brackets and housing was made. Testing was done and results were finalized. This showed that all of our research questions were successfully answered with positive results and further research around implementing AI and weather protection would be usefully to successfully make this a fully functioning product. / Fågelmatning är något de flesta de flesta känner till, antingen när barn matar svanar eller vuxna som har en fågelmatare i trädgården. Det här projektet tog det som inspiration för att skapa något som automatiskt matar fåglar samtidigt som den övervakar funktionen genom att ta kort och skicka denna information som en tweet på Twitter. Den här avhandlingen undersökte om det var möjligt att sammankoppla olika komponenter relativt enkelt för att skapa något mer avancerat. Forskning om komponenterna var det första steget i att undersöka om detta var möjligt. Följande komponenter kom att användas, an Raspberry Pi 3 b+, Raspberry Pi kameramodul, IKEA PIRsensor, zigbee USBdongel, ultraljudsensor och en micro servomotor. Dessa komponenter kopplades in i Raspberry Pi:en och testades individuellt för att säkerhetställa kvalite och funktion. När testerna var lyckade implementerades de tillsammans och konstruktionen av fästen och ytterhölje fördigställdes. Tester gjordes och resultat sammanställdes. Dessa visade att alla våra forskningsfrågor blev besvarade med ett positivt resultat och framtida forskning kring implementeringen av AI och väderskydd är något som skulle kunna möjliggöra detta att bli en fullt fuktionerande produkt.