Title :
Dispersion characteristics of microstrip with periodic perturbations
Author :
Tzuang, C.-K.C. ; Yu-Chiao Chen
Author_Institution :
Inst. of Electr. Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
Dispersion characteristics of a periodical planar microstrip line are presented in the form of Brillouin diagram together with plot of attenuation constant versus frequency. The dispersion characteristics are the results of the space harmonics deduced from the excited surface currents of the periodical structure. Rigorous theoretical methods and procedure for deembedding the space harmonics are reported and validated. The dispersion characteristics show that, in addition to the familiar forward traveling waves and backward traveling waves, a pair of complex modes is present in the stopband and the space harmonics become leaky waves when operating frequency is sufficiently high.
Keywords :
Dispersion (wave); Harmonics; Microstrip lines; Periodic structures; Waveguide theory; Brillouin diagram; backward traveling waves; complex modes; deembedding; dispersion characteristics; excited surface currents; forward traveling waves; leaky waves; microstrip; operating frequency; periodic perturbations; space harmonics; Attenuation; Corrugated surfaces; Frequency; Lattices; Microstrip; Periodic structures; Planar waveguides; Space exploration; Surface impedance; Surface waves;
Conference_Titel :
Microwave Symposium Digest. 2000 IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-5687-X
DOI :
10.1109/MWSYM.2000.862268
