Antennas &
Transducers
ARA, CTS011,RF100, RF200, RF300, RF400
Antennas are simply transducers for the measurement of radiation from the products under test. They convert field strength (radiation intensity or power) into a voltage that can be fed to the analyser. EN Standards demand that radiated emissions are measured at some distance from the product. For this, 'far field' antennas must be used, as opposed to 'near field' probes. Near field probes are very useful for locating emission sources but cannot be used for measurement of radiation levels.
Two 'far field' antennas and an RF absorbing clamp and one magnetic loop antenna are available for the RFK kits. The far field antennas comprise a simple dipole, the RF500, and a broadband antenna, the RF200. The RF300 loop antenna complies with the requirements of emissions from luminaires(EN55015). The RF400 complies with EN550014 for measurement of emissions from mains cables. Antenna factor compensation for the RF200, RF300 and RF400 is included in the EMCEngineer Windows software.
ARA Active Receive Antenna The ideal antenna for EMC testing in restricted spaces.
click on graphic below to view Product Details
- Small size, ideal for use in chambers.
- High sensitivity, better than typical coventional antennas.
- Can be used with any EMC analyser
CTS011 Miniature EMC Antenna
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- 30 MHz to 2 GHz frequency range.
- High sensitivity at all frequencies.
- Calibrated for EMC radiated emission measurements, antenna factor comparable to standard log-periodic, even at low frequencies.
- Ideal for analysing field patterns around EMC test sites/chambers and transmitter installations.
- The CTS011 is palm sized at 9.5 x 7.5 x 2 cm.
RF100 Near Field Probe Set Near field probes are an essential tool for the location of emission sources once the 'problem' has been detected in the far field. The set includes both an E field and an H field probe complete with storage case. Careful use of the probes will track down emission sources down to the nearest component in the case of point sources, locate leaks from enclosures (round doors, ventilation slots, panel joints etc.) and identify problem cables acting as aerials. They feature a unique flexible moulding to allow you to reach inaccessible locations. Curves of relative sensitivity are included with each probe.
click on graphic below to view Product Details
E-Field
Simple antenna
50ohm BNC
Detection of E-
Field signals A very short range
Used for high
impedance source
signals such as
produced by
inadequately
grounded circuits
H-Field
Balanced Faraday
Screened Loop
50ohm BNB
Detection of near field current (low
impedance) sources Rejection of E-Field makes this probe
the ideal tool for most 'EMC Sniffer' tasks
RF200 Broadband Antenna The RF200 is a calibrated broadband antenna which enables direct measurement of field strength over
the full radiated emissions spectrum.
Specification
Frequency range : 30MHz to 1GHz
Antenna factor: Curve issued with each antenna. Data pre-loaded
into EMCE software supplied with Laplace EMC kits
Calibration : Tested at NPL free space antenna test facility.
Ancillaries : SA1020 pre-amplifier.
Type : Modified log periodic
Size :
Length 1.7m Max Width 1.6m Stand : Construction -Tubular fibreglass /epoxy
supports and moulded plastic fittings.
Adjustable height : 1.1 to 2.1m
Antenna orientation : Vertical or horizontal
SA1020 RF pre-amplifier
A low noise RF pre-amplifier with nominal 18dB gain covering the frequency range 5KHz to 1100MHz. This battery powered unit features low noise performance making it ideal for any application requiring wide band amplification of low level signals. The SA1020 is used in conjunction with the RF100, RF200 and LISN.
Specification
Bandwidth (nom 3dB point) 10KHz - 1100MHz Gain : 20dB Gain accuracy : ±1dB for above range Noise (typical): 3dB (degradation of S/N ratio) Max safe input : 0dBm (220mv) Input impedance : 50R Max output into 50R : 0.5 volt pk-pk Output impedance : 50R Power : 9V PP3 battery Physical size :
Weight :115 x 107 x 50mm
200 grams (including battery)Connectors : 50ohm BNC
RF300 Large loop antenna
click on graphic below to view Product details
Developed specifically to meet the requirements of EN55015 for the testing of luminaires. Fully compliant and calibrated with 3 orthogonal loops mounted on a wooden frame.Loop diameter: 2metre.Calibration factors supplied on disk read by EMCEngineer Windows software
RF400 RF Absorbing clamp
EN55014 specifies the use of an RF absorbing clamp for the measurement of emissions for frequencies over 30MHz. This method offers many advantages over the alternative technique of using open test area sites and broadband antennas with the attendant problems of reflections, background radiation, ground plane effects and lack of space. The RF400 is designed to fully meet the requirements of EN55014 and CISPR16. Each unit is supplied with calibration data enabling the measurement of emissions with a high degree of confidence.
click on graphic below to view Product Details
- Fully compliant to CISPR16
- Accepts cables up to 19mm
- Split toroid design makes cable insertion easy
- Large diameter wheels for smooth running
- Each unit calibrated and correction factors included
- Shaped PTFE cable guides at each end ensure cable alignment and prevent chaffing
LISN1600click on graphic below to view Product Details
LISN16A1P shown.
LISNs are used to measure the RF conducted back down the mains lead from the unit under test (UUT). The design and construction of the LISN is specified by CISPR16. The Laplace LISN1600 is a fully compliant device in all respects.
The functions of the LISN are :
To provide a mains filter to isolate the measurement from
external mains interference.To present a known fixed impedance at RF frequencies
to the UUTTo facilitate the coupling of RF from the mains
lead to an output suitable for a connection to
analysers.To provide signal protection to protect mains
transients damaging any analyser.
For More Information see LISN Product Details
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