Aaronia PowerLOG 40400

The Aaronia PowerLOG 40400 is a double-ridged horn antenna covering 4 GHz to 40 GHz, with 12 to 17 dBi gain and a maximum input power of 300 W (peak), 150 W (CW). It has a 2.92 mm K (f) connector, measures 74 x 55 x 38 mm and weighs 150 g, and is suitable for both transmitting and receiving in EMC immunity and emissions work.

High Input Power for Immunity Testing

Aaronia rates the PowerLOG 40400 at 300 W (peak), 150 W (CW), which is why it suits radiated immunity testing where an amplifier drives the antenna to produce high field strengths, as well as receive work. Gain rises across the band to 17 dBi, typical VSWR is below 2:1 (18 GHz to 40 GHz), and the beamwidth is 16° vertical, 20° horizontal.

Compact Microwave Horn

At 74 x 55 x 38 mm and 150 g, the PowerLOG 40400 is small enough to sit close to a device under test. Aaronia gives an antenna factor of 24 to 40 dB/m.

Calibration Data Included

Specific calibration data (18 GHz to 40 GHz) and a mounting plate are included. With the antenna factor applied, the spectrum analyser reading converts to field strength, and in transmit use the gain figures let you work out the field strength produced at the test distance.

Specifications

Limitations

• Calibration data covers 18 GHz to 40 GHz only, although the antenna operates from 4 GHz; ask us if you need calibrated results below 18 GHz.
• A horn is directional: it must be aimed at the device under test, and its coverage at short distances is limited by the beamwidth.
• Transmit use is subject to local radio regulations.

PowerLOG Range Compared

Typical Applications

EMC immunity and emission measurements, and receive measurements on microwave devices with a spectrum analyser, where a small horn can sit close to the device.

The PowerLOG 40400 suits EMC test engineers and RF and microwave engineers who need a horn for 4 GHz to 40 GHz, calibrated from 18 GHz.

What's Included

• PowerLOG 40400 antenna
• Mounting plate
• Calibration data

Request a formal quotation for the PowerLOG 40400, or contact us to check it against your amplifier, analyser and test distance before you order.

Frequently Asked Questions

Which PowerLOG Model Do I Need?

Choose by frequency range. The 10800 covers 1 GHz to 8 GHz, the 70180 700 MHz to 18 GHz, the 40400 4 GHz to 40 GHz and the 50700 5 GHz to 70 GHz. The 70180 has the highest published power rating (500 W peak), followed by the 10800 (400 W peak); Aaronia gives no rating for the 50700.

Answered by John Legg, Director, Debug Store

Can the PowerLOG 40400 Transmit and Receive?

Yes. Aaronia states the PowerLOG series is suitable for both transmitting and receiving, within local radio regulations. The maximum input power is 300 W (peak), 150 W (CW).

Answered by John Legg, Director, Debug Store

Is Calibration Data Supplied With the PowerLOG 40400?

Specific calibration data (18 GHz to 40 GHz) and a mounting plate are included.

Answered by John Legg, Director, Debug Store

Which Cable Do I Need for the PowerLOG 40400?

One with a 2.92 mm K connector at the antenna end, rated to 40 GHz and to the power you intend to transmit.

Answered by John Legg, Director, Debug Store

How Is the PowerLOG 40400 Mounted?

On the supplied mounting plate. Aaronia recommends its heavy tripod for the PowerLOG antennas.

Answered by John Legg, Director, Debug Store

Last reviewed: 31 October 2026