/ +91 6302553211

Antenna Passive Tuning and Anechoic Chamber Testing

Antenna tuning means how well antenna impedance is matched to its chipset. For example, a well-tuned 2.4 GHz WiFi antenna will have shallow return loss in 2.4- 2.484 GHz, thus ensuring shallow reflections with the chipset transceiver.

In this service, we optimize antenna performance on physical prototyping.  All antennas are sensitive to their environment, such as plastic metals, nearby metals…etc. When the antenna is integrated into the product, it’s common that its target turnings are slightly off-set from the simulations. Thus, antenna tunings needed to be adjusted to the target frequency range either by optimizing matching component values, topology, or slightly changing the antenna’s physical dimension.

The final antenna is always needed to be tuned in its final resting place and with the final usage environment to ensure the best RF link.

The antenna tuning procedure will result in optimal RF performance for the whole product.

We use state-of-the-art Agilent 5071C vector network analyzers with due ECAL kits. We measure the antenna’s “raw impedance.” By using antenna matching software, we design antenna matching circuit topology and values. We solder appropriate matching components to tune antenna resonance to the target frequency band.

Once antenna return loss is optimized, we will proceed to antenna passive testing in an anechoic chamber, ETS-8050. An antenna anechoic chamber provides a stable, non-reflective environment for antenna testing. At CoreIoT Technologies, we have an antenna anechoic chamber capable of measuring from 700 MHz to 10 GHz. Measurements below this frequency range are also possible.


CoreIoT will compile a report on the antenna measurements, including:

  • Details of any electrical or mechanical tuning techniques.
  • Matching network diagram and values.
  • Device sample with implemented matching changes.
  • Return loss plots of before and after matching.
  • Radiation pattern plots for each band.
  • Efficiency plots vs. frequency for each band.

Leave a Reply

Your email address will not be published. Required fields are marked *