More Practical Filters and Couplers

A continuation of Practical Filters and Couplers, this guide collects 18 additional articles of interest on practical filters, couplers and baluns. Focuses on articles covering tunable structures and couplers featuring lumped-element, planar and active component approaches. Contents: Introduction; Practical Microwave Filter Design; An Efficient Procedure for Narrow-Band Band-Pass Filter Design; Construction of High-Reliability, Low-Loss Microwave Filters; Dual Mode Microstrip Filters; Design of a Simple Tunable/Switchable Band-Pass Filter; Electronically Tuned L-S Band Filters; 4 to 40 GHz Ferrite-Tuned Filter; A New Tunable Branch Line Coupler; Notes on Power Combiner and Splitter Circuits; A Wideband Balun-How Does it Work?; Broadband, VHF Lumped-Element Couplers Using Imperfect Transformers; A Lumped-Element Rat Race Coupler; Design of Baluns Using Backward-Wave Couplers; Analysis of a Variable Attenuator Using a 3 dB Quadrature Coupler.