Com-Power ABM-6000 User Manual

Features

Frequency Range: 1 GHz to 6 GHz

Dipole-like radiation pattern compliant
with CISPR 16-1-4 requirements for >1 GHz
site validation measurements

Transmit or receive capability

Three year warranty

Microwave Biconical

ABM-6000

Description

The ABM-6000 is a precisely tuned, linearly polarized,
mini-biconical dipole antenna, operating at the low end
of the microwave band over the frequency range of 1 to
6 GHz. It may be used as either a transmitting or receiv­ing antenna.

The ABM-6000 was specifi cally designed to comply with
radiation pattern specifi cations detailed in CISPR 16-1-4
(section 8.2.2.1), and is intended to be used as the trans­mit source antenna for site validations above 1 GHz for
radiated emissions test sites, such as OATS (open area
test sites), anechoic and semi-anechoic chambers.

Its lightweight, compact design makes the antenna eas­ily portable, while its stainless steel housing and brass
elements provide durability, enabling the antenna to be
transported and used in almost any environment. The
textured, powder-coated handle section of the shaft along
with the supplied mounting clamp allow for easy mount­ing of the antenna on any tripod or antenna mast.

Each antenna is individually calibrated per ANSI C63.5:
2006 at 3 meters distance.

The antenna is supplied with a protective carrying case,
mounting clamp, user's manual, calibration data and cer­tifi cate. Com-Power also off ers several non-conductive
tripods.

Application

Until recently, radiated emission test site validation re­quirements and procedures existed only for frequencies
between 30 MHz and 1 GHz. Validation requirements
at higher frequencies remained "under consideration"
literally for decades.

The eventual implementation of (>1 GHz) requirements in
CISPR 16-1-4 came in the form of the so-called site voltage
standing-wave ratio (S
a transmitting source antenna is placed in several posi­tions within, and around the perimeter of, an imaginary
cylindrical test volume, in which Equipment Under Test
(EUT) would be located during testing. As the physical
dimensions and types of radiating structures/apertures
will vary depending on the EUT, it must be assumed that
any EUT could potentially radiate energy in any given
direction. Therefore, the transmit source antenna must
have a relatively uniform radiation pattern in order to
eff ectively "illuminate" the entire test volume and sur-
rounding area equally, or else potential refl ections that
could occur during testing will be masked.

Since the ABM-6000 has a true "dipole-like" radiation
pattern, as described in CISPR 16-1-4, it is the ideal choice
as the transmit source antenna for test site validations
using the S

The ABM-6000 can also be used in a variety of applica­tions such as, amplifi er harmonic measurements per
IEC 61000-4-3 or fi eld surveys. It is ideal in almost any
application necessitating measurements of high level
signals with minimum fi eld disruption.

VSWR

VSWR

procedure.

) procedure. In this procedure,

Com-Power Corporation 114 Olinda Drive, Brea, California 92823 (714) 528 - 8800 www.com-power.com

1

2

3

4

5

6

7

8

9

10

123456

Frequency (GHz)

VSWR (x:1)

`

20

25

30

35

40

45

50

123456

Frequency (GHz)

Antenna Factor (dB/m)

-10

-5

0

5

10

15

20

Gain (dBi)

`

Microwave Biconical

90

75

60

45

30

15

0

-15

-30

-45

-60

-75

-90

-105

-120

-135

-150

-165

180

165

150

135

120

105

90

75

60

45

30

15

0

-15

-30

-45

-60

-75

-90

-105

-120

-135

-150

-165

180

165

150

135

120

105

1 GHz

2 GHz

3 GHz

4 GHz

5 GHz

6 GHz

E-plane

H-plane

(horizontal)

(vertical)

ABM-6000

Specifi cations

Antenna Type Microwave Biconical

Frequency Range 1 to 6 GHz
Antenna Factor 32 to 46
Isotropic Gain

-3 to 4.5

VSWR 3:1
3 dB beamwidth 75° to 95°
Impedance 50 ohms
Inversion Symmetry < 1 dB
Cross-polarization > 20 dB rejection
Overall Length 20.5 inches (52 cm)
Max. Width (elements) 2.5 inches (6.35 cm)
Connector Type N-type (female)
Max. Input Power 50 Watts

dB/m

dBi

(average)

Traditional vs

Some manufacturers have introduced unconventional "in­line" mini-biconical dipole antennas, in which the feed line
is along a coincident plane with, and routed through, the
center of the antenna elements, as opposed to the more
traditional dipole arrangement employed by the ABM­6000, with the feed line perpendicular to the elements.

While the in-line arrangement does provide a more omni­directional pattern in the H-plane (vertical axis), the E-plane
(horizontal) performance is sacrifi ced. Horizontally, the
antenna symmetry is off set by the feed line extending
out along one side of the transmit plane, forming ripples
and/or side lobes, which would not typically be present
with the traditional dipole arrangement. These anomalies
can often lead to unpredictable test results during site
validation.

Weight 13 oz. (0.368 kg)

All values are typical values unless otherwise specifi ed.
Specifi cations are subject to change without notice.

Antenna Factors / Gain (typical)

VSWR (typical)

"

in-line" dipoles

Antenna Patterns (typical)

Com-Power Corporation 114 Olinda Drive, Brea, California 92823 (714) 528 - 8800 www.com-power.com