antennas

This article describes the design and performance of a wide-band hybrid antenna suitable for use in reverberation chambers. The antenna is characterized over the frequency range 100 MHz to 25 GHz showing that it performs well above 200 MHz although its ultimate highest operating frequency has not been established.

This year marks not only the title anniversary, but arguably also that of the beginning of the modern era in vehicle electromagnetic interference (EMI) testing. Radiated emission (RE) testing of equipment to be used on self-contained vehicles is performed at one meter or less versus testing at a distance of three meters or more for equipment designed for use in homes, offices and factories.

This article provides a basis for using gated time domain and a highly reflective mirror to measure the gain, phase, beamwidth and radiation pattern of broadband antennas. The tests were completed using the Anritsu VectorStar VNA. The speed and data points (100,000) make possible high resolution in time domain. Three commercial reference horns were measured and an aperture and mirror conductivity correction applied. The resulting data agreed reasonably well with the published data. Two additional classical methods were also performed for validation.

Rohde & Schwarz, a leading manufacturer of test & measurement, communications and broadcasting equipment, has developed a handheld cable and antenna analyzer that features an advanced set-up measurement "wizard" to simplify the user interface.

Electro-Metrics is proud to introduce the EM-6945 “Vector” Log Periodic Antenna. The “Vector” covers 500 MHz to 25 GHz in a small, rugged, deployable package. This new passive antenna features the uncompromising performance you’ve come to expect from Electro-Metrics.

Electro-Metrics is proud to introduce the EM-6857 ultra wide band, omni-directional, passive antenna. The EM-6857 performs over a frequency range from 20 MHz to 40 GHz and is the ideal antenna for TSCM and many SIGINT applications.

Unlike so many technologies in use today, horn antenna history actually started more than a hundred years ago. This short article introduces the reader to the history of horns from the early experiments of radio pioneers to the “horn boom” during the 1940s and 1950s. The article ends with the latest evolution of horn antennas.