Leo G. Maloratsky
 Write for Microwaves & RF
5 results found for Leo G. Maloratsky, displaying items 1 - 5

April 2009   [Components]
Analyze Bearing Accuracy Of A Monopulse System (Part 2)
As detailed last month in Part 1 of this two-part article series, an amplitude monopulse system requires tightly matched amplitude balance between receiver channels to provide good bearing accuracy. Also, minimizing bearing errors depends on minimizing phase and amplitude imbalance in the SBFN and antenna. Differences in insertion loss and gain among these channels result from variations in physical components. The receiver channels also operate ...

March 2009   [Components]
Analyze Bearing Accuracy Of A Monopulse System
Amplitude monopulse direction- finding (DF) systems depend on tight component tolerances to achieve a high degree of bearing accuracy. By using an amplitude monopulse system with four-monopulse antenna and switched beam-forming network as an example, it is possible to better understand the effects of the RF/microwave components on the overall system peak and rootmean- square (RMS) bearing accuracy. The first portion of this two-part article will show...

October 2008   [Devices & ICs]
Setting Strategies For Transmission Lines
Last month, the first part of this article made recommendations for choosing the physical dimensions of stripline. A large height, H, ensures high power-handling capability. Smaller H requires a smaller strip for the same impedance, leading to higher losses. The thickness, h, of the suspended stripline dielectric substrate should be as small to minimize losses and parasitic inductance of vias, as well as to reduce cost. For slotline, the...

September 2008   [Systems & Subsystems]
Setting Strategies for Transmission Lines
Transmission lines are often taken for granted in the design of high-frequency circuits and integrated circuits (ICs), since the focus is often on getting signals into and from an active device. But by understanding the capabilities of different microwave/RF transmission lines and how to optimize them, design iterations, time, and unnecessary cost can be saved from a project. Part 1 of this two-part article will show how a careful design process should...

September 2003   [Components]
Assemble A Tunable L-Band Preselector
Electrically tunable preselectors are key elements in communications, avionics, and radar receivers. Narrowband RF and microwave preselectors prevent large off-channel signals from overdriving a receiver front end. Microstrip combline and...