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Bilogical Antenna FAQ's

As part of our commitment to provide you with information that adds value to your work, A.H. Systems is continuously producing articles and application notes on specific uses of our products. Our complete library of technical articles and application notes is available below for public use as an open reference for the RF engineering community. If you need information on a topic you don’t see here or you require additional technical support, we can help. Contact support to talk with one of our engineers for answers.

Common Questions

A bilogical antenna is a hybrid antenna that combines a biconical antenna and a log-periodic antenna into a single unit. This design allows it to operate efficiently across a wide frequency range, typically from around 25 MHz to 2 GHz, and is commonly used for electromagnetic compatibility (EMC) testing, including both emissions and immunity testing. Bilogical antennas provide a convenient and cost-effective solution by eliminating the need to switch between two separate antennas for a single test sweep. 

The calibration measurement point for a 1 meter separation is from the tip (nearest point) of the antenna. The measurement point for the 3 and 10 meter separation is at the midpoint of all the elements. There will be a sticker indicating the emission measurement reference point.

Antennas act differently in the near field vs. far field. Many calibration standards require different testing separation distances. Once the antenna is in the far-field, the antenna response does not change with increasing distances.
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