FOSTTEK FST-106 9KHz-3.5GHz Log Periodic Antenna for EMC Conducted Radiation Pre-Compliance Testing

FOSTTEK FST-106 9KHz-3.5GHz Log Periodic Antenna for EMC Conducted Radiation Pre-Compliance Testing

Description:
This antenna is designed through simulation and calculation based on laboratory environments. It does not require FACTOR value settings. And its test results closely match those obtained in laboratory settings.

During routine EMC troubleshooting and testing, EMC engineers often need to visit anechoic chamber laboratories for testing after each round of modifications. If the tests fail, the engineers must return to their companies to make further adjustments and retest. This process wastes significant human, material, and financial resources, as well as time. However, building an in-house anechoic chamber is an extremely costly investment (even small chambers cost over tens of millions of RMB), a burden that most companies cannot bear.

Against this backdrop, we decided to develop the FST-106, a wideband log-periodic antenna designed specifically for EMC testing, with a frequency range of 9 kHz to 3.5 GHz. Its composite impedance is 50 ohms, and its VSWR is less than 2.0. This antenna is patented both nationally and internationally.

The antenna is easy to use; simply place it flat on the workbench. The EUT (Equipment Under Test) is placed on the antenna for horizontal and vertical tests (corresponding to the laboratory's horizontal and vertical test values). There is no need for test stands or amplifiers, as the antenna's gain meets the FCC and CE RED testing requirements.

The results obtained from testing with this antenna align with those from laboratory tests. This makes it very convenient for internal pre-testing and evaluation within companies. Once testing passes, a final test and evaluation at the laboratory can significantly reduce product testing time, accelerating the product's entry into international wireless markets.

Application:
This antenna is suitable for comprehensive EMC conducted and radiated simulation testing and rectification. It can also be used as a high-sensitivity receiving or transmitting antenna for the same working frequency range. The typical frequency bands for EMC testing are: 50 Hz ~ 2 kHz, 150 kHz ~ 30 MHz, 30 MHz ~ 300 MHz, 300 MHz ~ 1 GHz, and 1 GHz ~ 20 GHz. Different issues may arise in these frequency bands, each requiring specific solutions. However, the key is to identify which frequency band is problematic, and whether the rectification has been effective. Therefore, we need a sufficiently wideband test antenna, which allows us to quickly identify the problematic frequency range and focus on rectification to verify whether our solution is effective.

Simulation Testing Methods for Conducted and Radiated Emissions:
The EUT's power line and testing equipment are placed together on the test antenna. The frequency spectrum is set as follows:
* VBW and RBW are set to 300 kHz (or Automatic).
* The test frequency range is set from 1 kHz (the lowest spectrum range is typically 9 kHz) to 1 GHz.
* Use the Max Hold function.
* The limit line is set to -40 dBm.
* The EUT is fixed in place on the antenna (both horizontal and vertical orientations) and tested twice for each position. If any interference exceeds the set limit line, it is considered a failure, and rectification is recommended before re-certification.

Package Included:
* 1 x Log periodic antenna
* 1 x N (male) to SMA (female) connector
* 1 x BNC (male) to SMA (female) connector
* 1 x 1-meter SMA (male) to SMB (female) cable

Packaging Details:
* Weight: 8kg