The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents the design of a Gallium Arsenide MESFET based active Gilbert mixer in X-band (7.5 – 9 GHz). Gilbert mixer core fed through passive lumped baluns at RF and Local oscillator (LO) inputs have been used to achieve an isolation of better than 30 dB. An active combiner is designed at low frequency IF (Intermediate frequency) output. This circuit design exhibits a typical conversion gain...
A broadband FET resistive mixer MMIC on GaAs substrate is described in this paper. A non-linear model of MESFET operating in passive mode (Vds=0V) developed for design and simulation of mixer has also been analyzed. Measured mixer results match closely with the simulations based on the developed model. The on-chip broadband spiral baluns delivered wide frequency range from 230 MHz to 1.8 GHz while...
This paper presents the design of 50ohm microstrip line, modelling of the metal ceramic package, packaging and characterization of a GaAs MMIC die in the metal ceramic package with optimised interconnections and validation of its performance parameters. The packaged MMIC was characterized under various environmental conditions like temperature cycling, burn-in test and life tests at as per MIL-STD...
This paper presents the design and development of a compact C-band down converter realized in a 12mm×12mm surface mount metal ceramic package. The size reduction has been achieved by development of compact sized MMIC components required for the receiver, viz., a double balanced mixer, a voltage controlled oscillator with on-chip varactor and RF and IF amplifiers. All the MMICs have been designed and...
Design and development of a planar schottky diode which is process compatible with general planar MESFET process is described here. The device geometry has been designed and optimized keeping in view the applications up to Ku-band. The device was fabricated and characterized to extract the diode model. Two representative application circuits, viz. two types of microwave power limiters were designed,...
We report here the results of study of Glob top encapsulation of an MMIC amplifier and a multi-chip system. A broadband (2.5-5.0 GHz) amplifier MMIC and a VCO+ HPA system working in L-Band were packaged using Glob top encapsulant epoxy. The effect of this encapsulation on the performance of these MMICs was characterized. The alteration in performance is analyzed and method to compensate the alteration...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.