Title :
High frequency conductor and dielectric losses in shielded microstrip
Author :
Van Deventer, T.E. ; Katehi, P.B. ; Cangellaris, A.C.
Author_Institution :
Radiat. Lab., Michigan Univ., Ann Arbor, MI, USA
Abstract :
An integral equation method is developed for calculating the dispersion of imperfectly conducting microstrip lines. Both dielectric losses in the substrate and conductor losses in the strips and ground plane are considered. Multiple conductors on several layers can be studied using an impedance boundary formulation for the derivation of the Green´s function. The microstrip losses are evaluated by using a frequency-dependent surface impedance which is derived by solving the fields in the conductors. This surface impedance replaces the conducting strip and takes into account the thickness and skin effect of the strip at high frequencies. Phase constant and attenuation for single and coupled strips are presented. Good agreement with data available in the literature is shown.<>
Keywords :
Green´s function methods; dielectric losses; integral equations; losses; strip lines; surface conductivity; waveguide theory; Green´s function; attenuation; conductor losses; dielectric losses; dispersion; frequency-dependent surface impedance; impedance boundary formulation; imperfectly conducting microstrip lines; integral equation method; multiple conductors; phase constant; shielded microstrip; skin effect; Conductors; Dielectric losses; Dielectric substrates; Frequency; Green´s function methods; Integral equations; Microstrip; Skin effect; Strips; Surface impedance;
Conference_Titel :
Microwave Symposium Digest, 1989., IEEE MTT-S International
Conference_Location :
Long Beach, CA, USA
DOI :
10.1109/MWSYM.1989.38872
