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Copper Mountain Technologies: Near & Far Field Measurements

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...Measuring Impedance, Calibration, Time Domain Measurements

Copper Mountain Technologies: Near & Far Field Measurement - RF Cafe

Copper Mountain Technologies "Near and Far Field Measurement."

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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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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