advertisment Advertisement
This ad will close in  seconds. Skip now
advertisment Advertisement
advertisment Advertisement
advertisment Advertisement
advertisment Advertisement

Industry News

Nonlinear Diode Models for Enhanced Simulation Accuracy

A library of robust models featuring substrate scalability and temperature dependence is now available for surface-mount diodes. The Modelithics Nonlinear Diode (NLD™) Library contains a compilation of measurement validated nonlinear diode models developed from I-V, C-V, small- and large-signal S-parameter characterization data. Over-temperature testing, combined with Modelithics’ patent-pending substrate-scalability...
Read More

Planar Electromagnetic Software – Personal Reflections

I first realized there was a major problem in 1982 when I moved from GE Valley Forge Space Division to GE Electronics Laboratory (E-Lab) in Syracuse to design some of the first GaAs monolithic microwave integrated circuits (MMIC). I took over the design of a C-band low noise amplifier...
Read More

A CAD Algorithm for RF/Microwave Interconnect Modeling

This article presents a numerical technique (CAD) to model and analyse interconnects encountered in the design of high speed/high frequency analog RF/microwave circuits with mixed, lumped and distributed elements to be implemented on-chip. In this meth...
Because of the rapid growth in density and complexity of modern integrated circuit interconnects, modeling has been a requirement in circuit design and simulations. On-chip interconnects have achieved a dominant role, especially in determining the performance of RF and monolitic microwave integrated circuits (MMIC). In the last two decades,...
Read More

A CAD-oriented Approach to Design of Load Impedance and Input Matching in Active Transmitting Antennas

This article discusses a general computer-aided design (CAD) approach to obtain the optimal fundamental load impedance and design the input matching circuits for an active integrated antenna of the transmitting type. A case study of a design for 1.6 GH...
An active integrated antenna (AIA) may be defined as a system in which an active device, usually a transistor, is closely integrated within an antenna, using a minimum of intervening circuitry. In recent years, AIAs have been considered a useful approach for improving performance and reducing size in front-end...
Read More

De-embedding Using a Vector Network Analyzer Including Calibration and Measurement Techniques

The inclusion of adapters and test fixtures in a measurement setup is often necessary even if the consequence is less accuracy. De-embedding the device characteristics has been traditionally the most effective method of minimizing the negative effects. However, the process of de-embedding has been a laborious, expensive procedure restricted...
Read More

The Importance of Sweep Rate in DC IV Measurements

The importance of taking due care in setting up IV measurement sweep rate is explored for the case of a GaAs MESFET and a silicon MOSFET. A numerical metric, called the normalized difference unit (NDU), is shown to be useful in determining appropriate ...
The DC IV characterization of a device is important in predicting RF operation. DC IV results predict the quiescent bias and low frequency IV characteristics for a device, while in some cases they can be corrected to represent RF characteristics at a given quiescent bias point. 1,2 In addition,...
Read More

Transient Simulations at RF Frequencies

Harmonic balance simulation is a fast and effective means for accurately predicting the steady-state performance of RF, microwave and millimeter-wave circuits. Transient simulation is also important for predicting the time-domain behavior of many of these circuits, especially when they include oscillators, frequency dividers and mixed-signal functions. Several SPICE-based circuit...
Read More

US Air Force Research Laboratory Exercises Option for X-band Thin Radar Aperture

Raytheon Co.’s option to proceed with its X-band thin radar aperture (XTRA) contract has been exercised, allowing the company to produce the next generation radar antenna technology for the J-UCAS (Joint Unmanned Air Combat System) that could revolutionize manned and unmanned combat systems. The AFRL (Air Force Research Laboratory)...
Read More

Northrop Grumman Readies Commercial Aircraft Anti-missile System

Northrop Grumman Corp. announced it will install and flight test its commercial aircraft protection system on a Boeing 747 and MD-11 this year. The system, called Guardian, represents the successful transfer of proven military directional infrared countermeasures (DIRCM) technology to protect commercial aircraft from attack by ground-based, shoulder-fired missiles....
Read More

Raytheon's Affordable Ground Based Radar Passes Milestone

Raytheon Co.’s Affordable Ground Based Radar (AGBR) passed a critical milestone during a recent United States Marine Corps test in support of the goal to field future radar sensors configured in a tactical and highly mobile design for the Marine Expeditionary Forces worldwide. In line with the schedule laid...
Read More

Sign-In

Forgot your password?

No Account? Sign Up!

Get access to premium content and e-newsletters by registering on the web site.  You can also subscribe to Microwave Journal magazine.

Sign-Up

advertisment Advertisement