Antennas

Emission measurements

EMI-Receiver

Antennas

Accessories

Broadband Antenna

The ALX-4000E is an especially optimized version for emission measurements. It offers lower antenna factors and improved VSWR. Additionally it can be used for immunity tests which require an input power of less than 100 W cw (200W intermitt.).

The ALX-8000E has an extended frequency range up to 8 GHz. All antennas are supplied with antenna factors for 3.0 m and 10.0 m measuring distance (1.0 m on request).

ALX-4000E
Technical specifications ALX-4000E
Frequency range 25 MHz to 4 GHz
Max. input power 200 W (intermtt.)
100 W (cont.)
Nominal impedance 50 Ω
Connector type N female
Isotropic gain (LP-Section) 6.4 +/- 1.2 dBi
Antenna factor 7 … 34 dB/m
Standing wave ratio SWR typ. < 1.5
Front to back ratio 20 dB (f > 150 MHz)
Cross polarization >20 dB (30 MHz…1 GHz)
3 dB beamwidth typ. (E-Plane) 45°-65° (f > 150 MHz)
≈ 78° (f < 150 MHz)
3 dB beamwidth typ. (H-Plane) 90°-120° (f > 150 MHz)
Dimensions (W x L x D) 1500 x 910 (1240) x 620 mm
Weight 3.1 kg
Fixation (indexing ring) 22 mm tube
Use Radiated immunity tests
Emission measurements

 

ALX-8000E
Technical specifications ALX-8000E
Frequency range 25 MHz to 8 GHz
Max. input power 200 W (intermtt.)
100 W (cont.)
Nominal impedance 50 Ω
Connector type N female
Isotropic gain (LP-Section) 6.4 +/- 1.2 dBi
Antenna factor 7 … 43 dB/m
Standing wave ratio SWR typ. < 1.5 (f > 150MHz)
Front to back ratio 20 dB (f > 150 MHz)
Cross polarization >20 dB (30 MHz…1 GHz)
3 dB beamwidth typ. (E-Plane) 45°-65° (f > 150 MHz)
≈ 78° (f < 150 MHz)
3 dB beamwidth typ. (H-Plane) 90°-120° (f > 150 MHz)
Dimensions (W x L x D) 1500 x 920 (1253) x 620 mm
Weight 3.1 kg
Fixation (indexing ring) 22 mm tube
Use Radiated immunity tests
Emission measurements

 

Stacked Log.-periodic Antenna

MAX-9

Stacked logarithmic-periodic broadband antenna for radiated immunity tests and emission measurements in the microwave frequency range. The antenna structure is made of laser-cut brass.

For protection of the fine antenna structure against damage the antenna is equipped with a low loss plastic protection cover. The MAX-9 is especially suitable for immunity testing acc. to IEC 61000-4-3 because of its good field uniformity. Further outstanding characteristics of the MAX-9 are the wide bandwidth, the nearly constant high gain, very good impedance matching as well as equal beamwidth in E- and H-plane.

Technical specifications MAX-9
Frequency range 600 MHz – 10.5 GHz
Max input power 300 W (f = 1 GHz)
150 W (f = 6 GHz)
Nominal impedance 50 Ω
Connection type N female
Isotropic Gain  typ. 10.3 dBi ± 1.5 dB
Antenna factor 18 … 41 dB/m
SWR typical < 1.5 (f < 7 GHz)
Front to back ratio > 25 dB typ.
Cross polarization rejection > 30 dB typ.
Half-power beamwidth (E-Plane) 46° ± 10°
Half-power beamwidth (H-Plane) 48° ± 10°
Dimensions (W x L x D) in mm 460 (+215) x 270 x 270
Weight 3.7 kg
Fixation Ø 22mm mounting tube
Use Radiated immunity tests
Emission measurements

 

MAX-18

Stacked logarithmic-periodic broadband antenna for radiated immunity tests and emission measurements in the microwave frequency range. The antenna structure is made of laser-cut brass.

For protection of the fine antenna structure against damage the antenna is equipped with a low loss plastic protection cover. The MAX-18 is especially suitable for immunity testing acc. to IEC 61000-4-3 because of its good field uniformity. Further outstanding characteristics of the MAX-18 are the wide bandwidth, the nearly constant high gain, very good impedance matching as well as equal beamwidth in E- and H-Plane.

Technical specifications MAX-18
Frequency range 700 MHz – 20 GHz
Max input power 50 W
Nominal impedance 50 Ω
Connection type N female
Isotropic Gain typ. 8.6 dBi ± 1 dB
Antenna factor 20 … 49 dB/m
SWR typical < 2
Dimensions (W x L x D) in mm 490 x 270 x 270
Weight 1.2 kg
Front to back ratio > 25 dB typ.
Cross polarization rejection > 28 dB typ.
Half-power beamwidth (E-plane) 58°
Half-power beamwidth (H-plane) 60°

 

Broadband Horn Antenna

HAX-6

The horn antennas HAX offer a very low SWR in their nominal frequency range and a very broad bandwidth. The gain increases with frequency up to approx. 18 dBi. The increasing gain with frequency helps to compensate cable losses.

The HAX series is suitable for both, transmission and receiving applications. The maximum allowed input power is only limited by the female N-connector. The detailed manual of the calibrated test antennas includes gain, antenna factor, SWR and directional patterns. The antenna is mounted with the 22 mm tube, equipped with a index ring for quick changes of polarization without using tools.

Technical specifications HAX-6
Frequency range 500 MHz – 6 GHz
Max input power limited only by N-connector
Connection type N female
Gain 6 … 18 dBi
Antenna factor 19 … 29 dB/m
Standing wave ratio SWR typ. < 2
Dimensions (W x L x D) in mm 424 x 314 x 820
Weight 4.1 kg
Fixation Ø 22mm mounting tube
Material aluminium
Use Radiated immunity tests
Emission measurements

 

HAX-18

The horn antennas HAX offer a very low SWR in their nominal frequency range and a very broad bandwidth. The gain increases with frequency up to approx. 16 dBi. The increasing gain with frequency helps to compensate cable losses.

The HAX series is suitable for both, transmission and receiving applications. The maximum allowed input power is only limited by the female N-connector. The detailed manual of the calibrated test antennas includes gain, antenna factor, SWR and directional patterns. The antenna is mounted with the 22 mm tube, equipped with a index ring for quick changes of polarization without using tools.

Technical specifications  HAX-18
Frequency range 800 MHz – 18 GHz
Connection N-female
Isotropic Gain 6 … 18 dBi
Antenna factor 24 … 50 dB/m
Nominal impedance 50 Ω
SWR typical ≈1.5
Front to back ratio > 25 dB (f > 1.3 GHz)
Cross polarization rejection > 25 dB (1 GHz … 18 GHz)
3 dB Beamwidth typ. (E-plane) 90°-10°
3 dB Beamwidth typ. (H-plane) 60°-10°
Dimensions (W x L x D) in mm 245 x 195 (408) x 142
Weight 1.3 kg
Fixation Ø 22mm mounting tube
Use Radiated immunity tests
Emission measurements

 

HAX-40

The horn antennas HAX offer a very low SWR in their nominal frequency range and a very broad bandwidth. The gain increases with frequency up to approx. 16 dBi. The increasing gain with frequency helps to compensate cable losses.

The HAX series is suitable for both, transmission and receiving applications. The maximum allowed input power is only limited by the female N-connector. The detailed manual of the calibrated test antennas includes gain, antenna factor, SWR and directional patterns. The antenna is mounted with the 22 mm tube, equipped with a index ring for quick changes of polarization without using tools.

Technical specifications  HAX-40
Frequency range 14 GHz – 40 GHz
Max input power 10 W (cont.)
25 W peak
Connection SMA-compatible | female
Isotropic Gain 15 … 20 dBi
Antenna factor 38 … 45 dB/m
SWR typical ≈ 2
Front to back ratio > 30 dB
Cross polarization rejection > 25 dB
3 dB Beamwidth typ. (E-plane) 13° – 21°
3 dB Beamwidth typ. (H-plane) 14° – 23°
Dimensions (W x L x D) in mm 75 x 86 x 60
Weight 0.3 kg
Fixation 3/8″, 1/4″
Use Radiated immunity tests
Emission measurements

 

Active Rod Antenna

SAX-10

The active monopole antenna SAX-10 consists of a vertical rod and an impedance matching amplifier. The rod has a standard length of 1m (other rod length on request) and can be considered as short compared to the wave length in the frequency range 9 kHz-30MHz. The conversion factor is independent of the frequency because of the extremely high impedance of the matching amplifier. The circuit gives best results of noise and intermodulation for a conversion factor (antenna factor) of +10 dB and sensitive measuring receivers are able to use the whole dynamic range of the antenna. For very high field strength, an optional plug-in attenuator reduces the amplification by 20 dB.

In order to avoid absolutely any influence by the mains, power supply, voltage regulator a. o., the SAX-10 has built-in NiMH rechargeable batteries. The typical operation time is at least 50 hours. Charging time is 2-4 hours using the quick charger.

Rod antenna and amplifier cabinet are made of aluminium. The top plate can be fixed to the metal ground plane (counterpoise) with 4 screws. The connectors and controls are situated below the two plates. The rod length begins exactly at the top plate.

Technical specifications   SAX-10
Frequency range 9 kHz – 30 MHz
Antenna factor +10 dB/m ± 1.5 dB
Upper limit of field strength measurement 1 V/m (F=1 MHz, 1 dB compression) Input attenuator for higher field strength optional
Lower limit of field strength measurement Limitation by internal noise:
Typ. -3 dBμV/m / 10 MHz,
CISPR-Quasipeak, 9 kHz bandwidth
Typ. -8 dBμV/m / 10 MHz,
average detector, 9 kHz bandwidth
Output of the monopole amplifier BNC-connector, fem., 50 Ω nom.
Power supply 9.6 V / 1100 mAh NiMH
Dimensions and weight Length including thread connection 1 m,
weight approx.: 0.2 kg
Monopole (rod) 180 x 80 x 40 mm (WxHxD) without
BNC-connector (female) and controls.
Amplifier Top plate 220 x 120 mm,
weight approx.: 0.7 kg
Construction of the monopole (rod) Aluminium rod 16 mm diameter with
thread-hole M8
Construction of the amplifier Cabinet made of aluminium profiles.
Top plate 3mm aluminium material
Threads for tripods 1/4″, 3/8″

 

Active Loop Antenna

LAX-10

Active, shielded loop antenna with nearly constant antenna factor over the entire frequency range, battery driven to minimize disturbance influence from power line. Combined with a CISPR-16 EMI-receiver a convenient field strength measuring system with low noise and pulse measuring capabilities is composed. The LAX-10 can also be used with a spectrum analyzer. The shielded aluminum housing is equipped with rubber feet for desktop operation or can be mounted to a tripod using the female camera thread (3/8”) at the bottom. A protection circuit against deep discharge provides a long battery lifecycle. The battery must be recharged after an automatic switch off.

A full battery charging period using the recommended charger takes around 5 hours. The PWR-switch must be set to OFF during the recharging period, otherwise no charging takes place. The charging connector is disabled while the PWR switch is set to ON (normal measuring operation), this avoids disturbances generated by the charger having an unwanted influence on the measurement.

The active loop antenna LAX-10 can be used for the frequency selective measurement of magnetic fields in the long wave, mid wave and short wave frequency ranges. It can be used for testing according to CISPR, MIL, FCC, EN, ISO, ANSI, ETSI and many other standards.

Technical specifications  LAX-10
Nominal frequency range 9 kHz – 30 MHz
Connector, female 50 ohm, BNC
Antenna factor for fict. E-field strength 20 dB / m
Antenna factor for H-field strength -31.5 dB / Ω
Loop diameter 0.5 m
Fieldstrength measuring range QP-Detector / 9 kHz IF-Bandwidth 30 – 130 dBμV/m
Fieldstrength measuring range AV-Detector / 200 Hz IF-Bandwith 8 – 130 dBμV/m
Operation time with full battery capacity typ 12h
Battery capacity 12 V NiMH 1.9 AH
Recommended charger ACS 110
Mounting thread 1/4”, 3/8”
Dimensions (W x L x D) in mm 520 x 585 x 120
Weight 1.9 kg

 

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