Showing results: 1 - 15 of 32 items found.
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Schwarzbeck Mess Elektronik
Helmholtz-Coils are especially designed to generate precisely defined magnetic fields from DC to the upper end of the audio frequency range and beyond. The generated fields are in a strongly linear relation to the coil current. The field- strength can be calculated exactly by analytical (or numerical) methods, based on the coils' geometry, the number of turns and the coil current.
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Schwarzbeck Mess Elektronik
Tuned half-wave dipoles have been among the most important antennas from thebeginning of rf-technique. The characteristics of half-wave dipoles havebeen calculable very early using the Maxwell and Hertz equations. Therefore the halfwave dipole became a reference antenna. The ideal (lossless) half-wave dipole has anisotropic gain of 2.15 dBi and an impedance of 73 Ohm. The directional pattern is circular inthe H-plane, "8-shaped" in the E-plane with the maxima perpendicular on the dipole axis.The half-power beamwidth (-3 dB) is approx. 78°. The impedance of real dipoles isdepending on the thickness/length ratio of its elements, typical values are 60-70 Ohm.Dipoles for industrial applications are available in the frequency range from 30MHz to up to approx. 4 GHz. The dipole elements are length variable (telescopic) orwith fixed length, the latter especially above 1 GHz. The most important applications aretest site evaluations (NSA, normalized site attenuation) and the determination of ERP(Effective Radiated Power) respectively EIRP (Effective Isotropic Radiated Power).
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Schwarzbeck Mess Elektronik
Helmholtz-Coils are especially designed to generate precisely defined magnetic fields from DC to the upper end of the audio frequency range and beyond. The generated fields are in a strongly linear relation to the coil current. The field- strength can be calculated exactly by analytical (or numerical) methods, based on the coils' geometry, the number of turns and the coil current.
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Standard LPDA -
Schwarzbeck Mess Elektronik
Frequency Range: 250 - 2400 MHzPolarisation: linearPattern Type: directionalMaterial: AluminiumMax Power: 1 kWConnector: Type N femaleImpedance: 50 Ω nominalLength: 0.69 mWidth: 0.75 mWeight: 1.35 kgMounting: 22 mm diameter tube
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Schwarzbeck Mess Elektronik
Linear polarized half-wave dipole with 1:1 balun and fixed element length for fieldstrength measurements at TETRA (terrestrical trunked radio) networks.
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Schwarzbeck Mess Elektronik
Circular shielded loop sensorto determine the magnetic field strength36 turns AWG 7/41diameter 133 mmdistance gauge 7 cm includedMIL 461E RE101 or RS101 alternative test procedures.
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Schwarzbeck Mess Elektronik
A passive loop antenna which is matched to a resonance frequency of 13.56 MHz with 370 kHz bandwidth (-3dB)The purpose of the antenna is to produce defined magnetic fields at 13.56 MHz efficiently, i.e. to test near field communication devices (NFC) or RFID equipment.
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Schwarzbeck Mess Elektronik
Calibration-Pulse Generatoracc. CISPR 16for Band A, B, C, D(9 kHz-1000 MHz)To calibrate the pulseresponse of EMI receivers.Pulse repetition frequency main generator 0.1 - 200 Hz (aux. generator up to 1 MHz) with IEEE-488 Interface.
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Schwarzbeck Mess Elektronik
Vertikal Active Rod Antenna9 kHz - 30 MHzBNCreduced noise floorwith mounting nut for AM 9144 and rechargeable battery
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