flattest Zi in the passband and hence the best match in to a resistive termination. See also Image impedance Constant k filter General mn-type image filters mm'-type filter Composite image filter References Bibliography Mathaei, Young, Jones Microwave Filters, Impedance-Matching Networks, and Coupling Structures McGraw-Hill 1964 (1980 edition is ). For a simpler treatment of the analysis see, Ghosh, Smarajit, Network Theory: Analysis and Synthesis, Prentice Hall of India, pp. 564–569 2005 . Image impedance filters Analog circuits Electronic filter topology