While many articles have been written on microwave devices, a great majority of them are prepared for specialists dealing in specific aspects of microwave engineering. At the same time, material at a fundamental level in tutorial form is extremely limited, especially for stu- dents who need to acquire basic knowledge in the field. Individuals seeking to gain a prelim- inary understanding of microwave circuits are usually relegated with little success to the end- less search from one reference source to another. For non-experts, sequential derivations of basic relations are rarely available...