Extended lattice filters enabled by four-directional couplers.
Novel lattice-filter structures consisting of four-directional couplers are introduced, analyzed, and discussed. Four-directional couplers are discussed, and energy-conservation relations in a field-wave application are derived. A thick linear lattice filter is presented and studied as a simple extension to the traditional lattice. A two-dimensional lattice structure is also introduced and studied. Transfer functions are derived and discussed for several examples.
MacFarlane
Duncan L
DL
Erik Jonsson School of Engineering and Computer Science, University of Texas at Dallas, Richardson, Texas 75083, USA. dlm@utdallas.edu
Tong
Jian
J
Fafadia
Chintan
C
Govindan
Vishnupriya
V
Hunt
L Roberts
LR
Panahi
Issa
I