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

Industry News

A 125 W Pulsed Ku-band Power Amplifier

Advanced Ku-band radar systems used in airborne military platforms need reliable, small size and weight, high power amplifiers. Sophia Wireless Inc. has developed a solid-state power amplifier, model MPC8-1520, which meets these requirements. Its key features include: Operating frequency: 16 to 17 GHz Internally pulsed RF DC storage capacitor...
Read More

CPW Transmission Insertion Loss on Si and SOI Substrates

The transmission loss properties of coplanar waveguide (CPW), built on bulk silicon and low and high resistivity silicon-on-insulator (SOI) substrates, are investigated systematically in this article. The experimental results show that the insertion lo...
Coplanar waveguides are widely used in MMICs as interconnects and matching networks. Designing low loss, multifunctional and highly integrable transmission lines is a key factor in obtaining high performance from MMICs in silicon technology. 1 Nevertheless, the low resistivity of a standard silicon substrate deteriorates the performance of on-chip...
Read More

A UWB Filter Using a Dual-mode Ring Resonator with Spurious Passband Suppression

A novel, compact, microstrip bandpass filter for ultra-wideband (UWB) radio systems is proposed. This filter has a 3 dB fractional bandwidth of 60 percent, with low insertion loss and sharp rejection. Based on a dual-mode ring resonator structure and w...
The investigation of the use of ultra-wideband (UWB) has been one of the most controversial technologies of modern times. Its applications can be seen in diverse areas such as local area networks, position location searching, advanced imaging of the human body, etc. Microwave ring resonators are the components proposed...
Read More

A New Class of Asymmetrical Directional Couplers for Power/Antenna Control Applications

A new class of asymmetrical directional couplers, convenient for power and antenna control applications, is proposed. The couplers can be fully or partially integrated into a printed circuit board (PCB). The couplers operate over -20 to -40 dB coupling...
Integration of RF power, RF small signal, digital, DC and supervision circuits is still one of the main goals of modern radar, satellite and wireless communications technology. Today’s solutions of close-to-antenna devices use a stack approach for integration of RF filters with power splitters/combiners and multilayer printed circuit boards...
Read More

Making Thermal Resistance Measurements without Test Diodes or Thermal Stages

Thermal resistance is a measure of the amount by which the junction temperature rises for a given level of power dissipation in a transistor Thermal resistance is important since it determines how much power a device and package combination can safely dissipate. Thermal resistance measurements normally require the measurement...
Read More

Sampling IF Filters and the Return of the Superheterodyne Receiver

Wireless systems-on-a-chip (SoC) have seen very high levels of integration in the last few years because the market is demanding reduced cost and low component count. Further to this trend, the integration of multiple standards has been introduced into the SoC. This integration strategy has caused superheterodyne receiver architectures...
Read More

Transistor LC Oscillators for Wireless Applications: Theory and Design Aspects, Part II

Part I of this tutorial article 1 gave a detailed discussion and analysis of the start-up and steady-state oscillation conditions for transistor LC oscillators with emphasis on CMOS devices. Part II presents both linear and nonlinear phase noise models for the parallel feedback and negative resistance oscillators. Each approach...
Read More

Harris Corp. Demonstrates Military Satellite Antenna Feed Prototype

Harris Corp. announced it has successfully completed multiple field demonstrations of a satellite antenna feed prototype that is capable of supporting selectable antenna polarization for orthogonal transmit and receive operations. The feed prototype achieved user data rates reaching an astounding 105 Mbps — more than 12 times the current...
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