Com-Power AHA-118 Horn Antenna

Frequency Range: 700 MHz - 18 GHz

The Com-Power AHA-118 is a double Ridge Guide broadband horn antenna. it has a frequency range of 700 MHz to 18 GHz. Most EMI test standards require the use of horn antenna for testing above 1 GHz. However, low amplitude signals are difficult measure without amplification. The built in preamplifier amplifies the received signals immediately at the antenna output increasing signal strength. This allows the low signals to be seen above the noise floor of the EMC receiver. This Horn antenna is an excellent choice for EMC radiated emissions testing above 700 MHz.

Request a quote

Com-Power AHA-118 Horn Antenna Product Description

The AHA-118 is a broadband, linearly polarised Double Ridge Horn Antenna with built-in, 40 dB gain, low noise preamplifier. This active antenna operates over the frequency range of 700 MHz to 18 GHz, with excellent efficiency from 1 GHz to 18 GHz.

This measurement system arrangement, with preamplifier directly behind the antenna, rather than next to (or embedded into) the remotely located test receiver, increases measurement sensitivity, as well as accuracy, by amplifying the received signals prior to being significantly attenuated by the long cable run between the test site and test equipment area.


The AHA-118 is designed to be extremely durable, making it an ideal choice for daily use in laboratory environments. The antenna is constructed using a heavy guage, high grade aluminium with a corrosion resistant coating. It is fitted with high quality, precision N-type coaxial connectors at the antenna terminals, as well as the preamplifier input/output terminals.


The AHA-118 Active Double Ridge Horn Antenna is suitable for use in the following capacities:

  • as an EMI test antenna for qualification-level regulatory compliance measurements (FCC, CE, MIL-STD-461, RTCA DO-160, FDA, SAE (automotive), etc.
  • as a transmitting antenna (preamp bypassed) for establishing radiated RF fields for product immunity tests, with up to 300 Watts input power
  • as a “substitution antenna” (preamp bypassed) for determining the Effective Radiated Power (ERP) and/or Effective Isotropic Radiated Power (EIRP) of intentional radiators
  • test site comparisons, shielding effectiveness tests of large enclosures, field monitoring, site surveys, and other general purposes


The AHA-118 can easily be configured by the operator on the fly, as necessary, to meet the specific requirements for the task at hand. Where system sensitivity (large signal to noise ratio) is not the primary concern; attenuation, notch or band pass filters can be inserted between the antenna and preamplifier, in order to facilitate measurements in the presence of high amplitude signals. Or, the preamplifier can be bypassed altogether, in which case the antenna can be used for receiving or transmitting purposes.

Com-Power AHA-118 Horn Antenna Resources

Related products

Sign up for the MCS Newsletter

You will receive all the latest test & measurement news and rental offers.