Design of Interdigitated Capacitors and Their Application to Gallium Arsenide Monolithic Filters

Theoretical expressions for the interelectrode capacitance and conductor losses for an array of microstrip transmission lines are presented. The effect of finite conductor thickness is included in the analysis by introducing equations for the effective width of the transmission lines. Good agreement...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 1983-01, Vol.31 (1), p.57-64
Main Authors: Esfandiari, R., Maki, D.W., Siracusa, M.
Format: Article
Language:English
Subjects:
Band pass filters
Capacitance
Capacitors
Conductors
Equations
Gallium arsenide
Insertion loss
Microstrip antenna arrays
Propagation losses
Transmission line theory
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Summary:Theoretical expressions for the interelectrode capacitance and conductor losses for an array of microstrip transmission lines are presented. The effect of finite conductor thickness is included in the analysis by introducing equations for the effective width of the transmission lines. Good agreement between theory and experiment is observed up to 18 GHz. Experimental results obtained from a lumped-element GaAs monolithic bandpass filter are in excellent agreement with theory. The filter has 1.5-dB insertion loss at 11.95 GHz and greater than 22-dB loss in the stopband. The filter measures 0.58x 1.3x0.203 mm.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.1983.1131429