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...Measuring Impedance, Calibration, Time Domain Measurements
Indianapolis, Indiana, September 26, 2022 - Copper Mountain Technologies
(CMT) has a whitepaper available entitled, "Near and Far Field Measurement." It
begins, "To obtain optimal performance in an over the air RF system, the
antennas must be chosen to meet specific requirements. Performance parameters
such as size, wind-loading, environmental ruggedness, transmission pattern,
bandwidth, and power handling capability should be considered. Especially
important in an RF system design is the 'link budget.' This parameter determines
the end-to-end RF loss and is affected by transmitter output power, feedline
loss, transmit antenna gain, path loss through the air, receiver antenna gain,
feedline loss once again and receiver noise-figure among other factors. A
failure to meet the link budget in an RF system design will result in noisy
performance and loss of coverage. In this application note, methods of measuring
the transmission (or reception) pattern which determines antenna gain with a VNA
will be examined. Most antennas possess some directionality to their
performance. Even an omnidirectional vertical antenna is usually designed to
restrict broadcast to a horizontal plane. Power radiated upwards into space is
wasted. A Yagi antenna with a single reflector and multiple directors might look
something like what is shown in Figure 1 where the drive point is shown in
red..."
About Copper Mountain Technologies
Copper
Mountain Technologies develops innovative RF test and measurement solutions
for engineers all over the world. It is based in Indianapolis with sales offices
in Singapore, London, and Miami. The company pioneered metrology-grade USB VNAs
in 2011 and continues to push for innovation and change in the industry, offering
a broad range of USB vector network analyzers, calibration kits, and accessories
for 50 Ohm and 75 Ohm impedance from 9 kHz to 110 GHz. The VNAs use software
for Windows® or Linux® operating system on an external computer, PC, or
tablet. CMT VNAs are used by engineers in defense, automotive, materials measurement,
medical, broadcasting, telecommunications and other industries. All CMT VNAs include
application and automation support, and years of our engineering expertise at your
disposal.
Contact Info
Copper Mountain Technologies
631 East New York Street
Indianapolis, IN
46202 | USA
Phone: 1-317-222-5400
Web: www.coppermountaintech.com
Posted November 30, 2022
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