David Ballo
 Write for Microwaves & RF
3 results found for David Ballo, displaying items 1 - 3

May 2008   [Test & Measurement]
Eliminate Fixture Effects On Device Measurements
Increased accuracy has been an objective of the earliest vector network analyzer (VNA) measurements. By means of calibration and vectorerror- correction techniques, the accuracy of a VNA can be extended from the instrument ports to the ends of the test cables. When the device under test (DUT) connects directly to the test port cables, the calibration plane and the measurement plane are one and the same. In this case, calibration and error ...

September 2007   [Test & Measurement]
Making Source-Corrected Noise-Figure Measurements
Noise limits the sensitivity of a receiver and degrades the performance of a transmitter.Both R&D and production environments rely on several time-honored approaches to evaluate component noise in terms of noise figure. They now have an additional option in the form of single-connection, source-corrected noise-figure measurements through 26.5 GHz using the Agilent PNA-X vector network analyzer (VNA) from Agilent Technologies (...

October 2002   [Test & Measurement]
Network Analyzers Simplify Mixer Test
Mixers are one of the fundamental components of every superheterodyne receiver (Rx), but evaluating them has never been easy, even with powerful vector-network analyzers (VNAs). The techniques employed to characterize the phase and group-delay...