US 7,321,276 B2
Independently adjustable combined harmonic rejection filter and power sampler
Todd Wayne Nichols, Cary, N.C. (US)
Assigned to Harris Stratex Networks, Inc., Morrisville, N.C. (US)
Filed on Jun. 30, 2005, as Appl. No. 11/169,879.
Prior Publication US 2007/0001780 A1, Jan. 04, 2007
Int. Cl. H01P 5/12 (2006.01); H01P 5/18 (2006.01)
U.S. Cl. 333—109  [333/110; 333/116] 16 Claims
OG exemplary drawing
 
1. A microwave variable low pass filter with directional coupling comprising:
a main transmission line;
a sub transmission line parallel and laterally spaced of said main transmission line, the sub transmission line in electromagnetic communication with the main transmission line;
one or more stubs operably connected to said main transmission line and opposite the sub transmission line,
at least one varactor operable connected between each respective stub and ground; and,
an adjustable reactance circuit operably connected between one end of the sub transmission line and ground, wherein the at least one varactor and adjustable reactance circuit are independently adjustable.