Abstract
The objective of the project is to design, fabricate and test a broadband micro strip balun to operate at a center frequency of 5 GHz and with a bandwidth range of 1-12 GHz. A balun circuit is used in commercial applications such as cellular telephones, high definition television and other circuits, which receives a single-ended input signal to generate an amplified differential signal with 180° of phase difference, with low VSWR at the input and output ports. The simulation of the design was done using the Agilent Advanced Design System (ADS) software. The circuit was then fabricated in microstrip, and the simulated results demonstrate high amplitude, phase balance, and low VSWR over the operating frequency range. The measured results also demonstrate good amplitude and phase balance, thought the VSWR values are on the high side, and future work will focus on further improvement in performance.