New Material Could Turn Antenna Dishes Into a Flat Surface

A group of researchers from Southeast University in Nanjing, China have developed a new material that can bend and direct EM waves as an antenna does. This new material is being described as the first broadband transformation optics metasurface lens.

1312 F3 cover

A Wide-band Hybrid Antenna for Use in Reverberation Chambers

1312 F3 coverThis 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.

article placeholder

Commission proposes fine for interference

The U.S. Federal Communications Commission (FCC) has proposed a fine of more than $200,000 against a Rhode Island company for operating unlicensed radio transmitters that created interference with critical weat... Read More...
1308 F2 cover

Diamond Jubilee: The 60th Anniversary of the Use of the 41 Inch Rod Antenna in Military EMI Testing

1308 F2 coverThis 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.

1206 F2 eq1

Single Antenna Measurement Using Gated Time Domain and The Mirror Method

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.