Title :
Electromagnetic crystal (EMXT) waveguide band-stop filter
Author :
Xin, Hao ; Higgins, Aiden ; Hacker, Jonathan ; Kim, Moonil ; Rosker, Mark
Author_Institution :
Rockwell Sci. Co., Thousand Oaks, CA, USA
fDate :
3/1/2003 12:00:00 AM
Abstract :
An electromagnetic crystal (EMXT) with a bandgap around 35 GHz is used as the top and/or bottom walls of a rectangular waveguide. Because of its bandgap, such an EMXT waveguide is a very effective band-stop filter with the rejection band centered at 35 GHz. More than 70 dB of isolation for the rejection band and less than 2 dB of insertion loss for the pass band are measured. Finite element simulation of the EMXT band-stop filter agrees very well with measurements. Using tunable EMXT walls, a band-stop filter with adjustable center frequency and bandwidth can also be realized.
Keywords :
band-stop filters; finite element analysis; losses; photonic crystals; rectangular waveguides; waveguide filters; 35 GHz; EMXT; adjustable bandwidth; adjustable center frequency; bandgap; electromagnetic crystal; finite element simulation; insertion loss; periodic electromagnetic structures; photonic bandgap crystals; rectangular waveguide; waveguide band-stop filter; Band pass filters; Bandwidth; Electromagnetic scattering; Electromagnetic waveguides; Finite element methods; Frequency; Insertion loss; Loss measurement; Photonic band gap; Rectangular waveguides;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2003.810121
