Com-Power Microwave Biconical Antenna for EMC/EMI testing above 1 GHz per CISPR 16-1-4

The ABM-6000 Microwave Biconical antenna is specifically designed to be the transmit source antenna for test site validations above 1 GHz per the CISPR 16-1-4 Site Voltage Standing Wave Ratio (SVSWR) procedure.
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The ABM-6000 is a Microwave Biconical antenna which is linearly polarised and meticulously tuned.

It operates between the frequencies 1 and 6 Ghz (which means it can receive and transmit low-end microwaves). It has an N-type connector, power handling of 50 watts, and a nominal impedance of 50Ω.

The ABM-6000 is small, portable, and weighs very little (13 ounces). Its overall length is 52cm and the maximum width of its elements is 6.35cm. With brass elements combined with stainless steel housing, it's strong, but light enough so you can carry it with ease. It's intended to be extra-durable so you can use it in any environment.

The antenna has a handle which is powder coated and textured. This makes it easy to mount the ABM-6000 on a mast or tripod using our provided mounting clamps. With the ABM-6000, we also provide a protective case and a user's manual.

Each of its antennas are individually calibrated to ANSI C63.5: 2006 regulation, of which we also include the appropriate certificate and data with the product.


The ABM-6000 Microwave biconical antenna is intended use is for testing radiated emissions sites; anechoic, semi-anechoic chambers, and open area sites (this is because its radiation pattern is similar to a dipole antenna). Therefore, it complies with all radiation pattern specifications regarding CISPR 16-1-4.

The ABM-6000 is also utilised in field surveys and amplifier harmonic measurements. It is perfect for necessitating the measurement of high-level signals with lesser field disruption.

This Microwave biconical antenna only exists because of recent changes in procedures and validation requirements for radiated emission testing. For decades, testing over 1 GHz was not part of CISPR's requirements until >1 GHz was implemented in the form of the SVSWR procedure. The 'site voltage standing-wave ratio' procedure consists of a transmitter antenna being placed within/around an imaginary test volume, which changes depending on the chosen test. This cylindrical test volume is 'imaginary' because there are no fixed physical dimensions, structures, or apertures because the available energy can theoretically radiate in any direction.

The antenna needs a uniform radiation pattern so it can equally 'illuminate' the surrounding test area with the cylindrical volume. During testing, if the transmit source antenna isn't relatively uniform, then any potential reflections will be masked.

The antenna has a conventional dipole arrangement with the feed line and other elements being perpendicular. This is different to the newer mini-biconical dipole antennas which are in-line (where the feed line travels centrally through the antenna).

Antenna Factors & Isotropic Gain (typical)

The graph below shows the ABM-6000's Antenna Factor in blue and its Isotropic Gain in red. RF and EMC antenna engineers use the Antenna Factor to describe the EFS (electric field strength) needed to produce 1 Volt at the antenna terminals. Also, the Antenna Factor shows what the antenna's received voltage is when an electric field is present. The ABM-6000's Antenna Factor varies between 32 and 46 dB/m.

Antenna factors for ABM-6000 Microwave Biconical antenna

Whereas, Isotropic Gain is used to describe the amount of power transmitted in the path of peak radiation to an isotropic source. The Isotropic Gain term is mentioned more often than directivity in specification sheets. This is because the Isotropic Gain considers the actual losses, whereas directivity does not. The ABM-6000's Isotropic gain varies between -3 and 4.5 dBi.

VSWR (typical)

The reflection coefficient is used to describe reflected power from an antenna. The Voltage Standing Wave Ratio (VSWR or SWR) is a function of this. Most commonly, the VSWR of a transmitting antenna is examined and measured upon tuning and installation. This prior measurement is required, to assure that damage isn't made to the antenna's transmitter if it receives an unexpected electrical impedance. This damage occurs because an antenna/feed line impedance which is non-matching prevents the antenna's full power being reached. The ABM-6000 has an average Voltage Standing Wave Ratio of 3 :1.

VSWR Graph for ABM-6000 Microwave Biconical antenna

Antenna Patterns (typical)

The below graphs show the antenna patterns for ABM-6000 microwave biconical antenna.

ABM-6000 H-Plane antenna pattern (vertical)
ABM-6000 E-Plane antenna pattern (Horizontal)

Datasheet ABM-6000 Microwave Biconical antenna

Datasheet PDF
Technical Specification
Manufacturer: Com-Power
Antenna Type: Microwave Biconical Antenna
Model: ABM-6000
Frequency Range: 1 GHz to 6 GHz
Antenna Factor: 32 to 46 dB/m
Isotropic Gain: -3 to 4.5 dBi
VSWR: 3:1 (average)
3 dB beamwidth: 75 to 95 degrees
Impedance: 50 Ω
Inversion Symmetry: < 1 dB
Cross-Polarization: > 20 dB rejection
Overall length: 52 cm / 20.5 inches
Max. Width (elements): 6.35 cm / 2.5 inches
Connector Type: N-Type (female)
Max. input Power: 50 Watts
Weight: 0.368 kg / 13 oz.
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