Microstrip microwave band gap structures
V SUBRAMANIAN
Microwave Laboratory, Department of Physics, Indian
Institute of Technology
E-mail: manianvs@iitm.ac.in
Abstract. Microwave
band gap structures exhibit certain stop band
characteristics based on the
periodicity, impedance contrast and effective
refractive index contrast. These
structures though formed in one-, two- and
three-dimensional periodicity, are
huge in size. In this paper,
microstrip-based microwave band gap structures are formed by removing
the substrate
material in a periodic manner. This
paper also demonstrates that these
structures can serve as a
non-destructive characterization tool for
materials, a duplexor
and frequency selective coupler. The paper presents
both experimental results and
theoretical simulation based on a commercially
available finite element
methodology for comparison.
Keywords. Microwave band gap; microstrip; gap width; frequency selective switch.
PACS Nos 84.40.Az; 41.20.Jb