Patent ID: 6043722
Filing Date: 2000-03-28
Classification: H01P

Abstract:
A phase shifter comprising:a microstrip conductor;a power divider disposed along said microstrip conductor, said power divider having first and second outputs;a substantially ""U"" shaped reference transmission line disposed on said microstrip conductor and connected to said first output of said power divider; anda phase shift filter device disposed on said microstrip conductor and connected to said second output of said power divider, said phase shift filter device comprising a 180 degree phase shift coupled line structure having opposing ends with one end connected to said power divider, and comprised of a first substantially linear 90 degree phase shift parallel line section comprised of two parallel spaced apart lines and a second substantially linear 90 degree phase shift parallel line section comprised of two parallel spaced apart lines coupled to said first parallel line section at the other end of said respective first substantially linear 90 degree phase shift parallel line section opposite the end connected to the power divider, and spaced offset from the respective spaced lines of the first section such that only one line of each respective section is collinear to each other, wherein said respective two line sections are positioned opposite said ""U"" shaped reference transmission line.