IJSRP, Volume 13, Issue 9, September 2023 Edition [ISSN 2250-3153]
Jihad Basuni, Prof. Adnan Affandi
A variable lumped-distributed branch line coupler with three selected coupling levels is designed and proposed in this paper. This variable coupler combines three separate couplers. Each coupler has its own coupling level and bandwidth. The first coupler is a distributed, and the second and third couplers are lumped-distributed. A comparison between simulated and practical results is covered in this study. Minor and ignorable differences between the simulated and practical results are found, so this coupler closely aligns with the theoretical results. Moreover, 3D designs and fabrications are executed and included in this paper. Circuit designs and their simulations are implemented using the Advance Design System (ADS) software.