This textbook originated in my research Reconfigurable Rectangular to Polar Converter using Linear Convergence for Multiband and Multimode Wireless Communications submitted at the Panjab University, Chandigarh (India). The book covers the transitional area between low frequency and high frequency wireless circuits. Speci cally, it introduces the fundamental physical principles related to the operation of a typical wireless radio communication system. The intended audience for this book are, primarily, senior engineering students preparing for research in wireless communication systems. At the...