Title :
Novel 18/36 GHz (M)MIC GaAs FET frequency doublers in CPW-techniques under the consideration of the effects of coplanar discontinuities
Author :
Abdo-Tuko, M. ; Naghed, M. ; Wolff, I.
Author_Institution :
Dept. of Electr. Eng., Duisburg Univ., Germany
fDate :
8/1/1993 12:00:00 AM
Abstract :
The design and performance of single-device and balanced versions of (M)MIC GaAs FET frequency doublers from 18 GHz to 36 GHz, fabricated in purely coplanar waveguide techniques, are presented. Coplanar discontinuities which are usually neglected are taken into consideration in the analysis and design. Spiral inductors and their associated parasitic capacitance are used for impedance matching and phase shifting purposes. The simulation technique used to characterize the spiral inductors is described in detail. Measurement and simulation results show good agreement. The investigated hybrid doublers have a minimum conversion loss of 7 dB while a maximum conversion gain of 6B is predicted for the monolithic version of the doublers. They are fabricated on ceramic and gallium arsenide substrates and are simple, cost effective, and applicable in low and medium power transmitter/receiver systems
Keywords :
III-V semiconductors; MMIC; field effect integrated circuits; frequency multipliers; gallium arsenide; hybrid integrated circuits; impedance matching; microstrip components; microwave integrated circuits; 18 to 36 GHz; 6 dB; 7 dB; CPW; GaAs; GaAs FET frequency doublers; MIC; MMIC; balanced version; ceramic substrate; coplanar discontinuities; hybrid doublers; impedance matching; maximum conversion gain; minimum conversion loss; monolithic version; phase shifting; simulation technique; single-device version; spiral inductors; Ceramics; Coplanar waveguides; Costs; FETs; Frequency; Gallium arsenide; Impedance matching; Inductors; Parasitic capacitance; Spirals;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
