RA Mayes | Precision Dipole Antennas

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Dipole Antennas

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Schwarzbeck RF Precision Dipole Antennas
Overview Dipole Antennas Tuned half-wave dipoles have been among the most important antennas from the beginning of rf-technique. The characteristics of half-wave dipoles have been calculable very early using the Maxwell and Hertz equations. Therefore the half wave dipole became a reference antenna. The ideal (lossless) half-wave dipole has an isotropic gain of 2.15 dBi and an impedance of 73 Ohm. The directional pattern is circular in the 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 is depending 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 30 MHz to up to approx. 4 GHz. The dipole elements are length variable (telescopic) or with fixed length, the latter especially above 1 GHz. The most important applications are test site evaluations (NSA, normalized site attenuation) and the determination of ERP (Effective Radiated Power) respectively EIRP (Effective Isotropic Radiated Power).

UHA 9105	Tuneable UHF - Half - Wave Dipole 300 - 1000 MHz w. telescopic elements Radiation Pattern

UHA 9125 C	Tuneable UHF - Half -Wave Dipole with EMI -Balun 0.75 - 2 GHz with 4 sets of elements LE = 180, 140, 100, 80 mm Radiation Pattern VSWR

UHA 9125 D	Tuneable UHF - Half - Wave Dipole with EMI - Balun 1.0 - 3 (4) GHz with 6 sets of elements LE = 140, 114, 90, 72, 60, 48 mm VSWR

VHAP	Schwarzbeck VHF Precision Dipole 30-300 MHz 2 sets of telescopic elements (mostly required in pairs) CISPR 16-1-5 Manual

UHAP	UHF Precision Dipole 300-1000 MHz (VHAP & UHAP mostly required in pairs) CISPR 16-1-5 Manual

ILS Dipole	Linear polarized half-wave dipole with 1:1 balun and fixed element length for fieldstrength measurements at instrument landing systems (ILS). Frequency range: localizer: 108 - 118 MHz (LOC, LLC) glideslope: 320 - 340 MHz (G/S) Gain: 1.5 dBi

TETRA DIPOLE	Schwarzbeck linear polarized half-wave dipole with 1:1 balun and fixed element length for measurements at TETRA (terrestrical trunked radio) networks. Frequency range: 340 - 480 MHz Gain: typ. 1.5 dBi

TDK RF Precision Dipole Antennas
Log Periodic Dipole Antenna LPDA-8003 800 MHz - 3 GHz 500 Watts CW	Compact broadband design Improved pattern symmetry Reduced cross polarization Fits common antenna mounts; EMC Automation mounts are also available Individually calibrated according to ANSI C63.5 with signed certificate of calibration

Log Periodic Dipole Antenna LPDA-0801 80 MHz - 1 GHz 2500 Watts CW	TDK RF Solutions’ LPDA-0801 is a medium gain Log Periodic Dipole Array that provides strong performance over the operating frequency range of 80 MHz to 1 GHz. The LPDA-0801 features very high power handing (2.5 kW continuous) capabilities to accommodate the most extreme EMC test requirements. High efficiency and low loss Robust mechanical design

Log Periodic Dipole Antenna LPDA-0803 80 MHz - 3 GHz 500 Watts CW	The TDK RF Solutions LPDA-0803 Log Periodic Dipole Antenna provides strong performance over the entire frequency range of 80 MHz to 3 GHz. The LPDA-0803 features enhanced gain over standard log periodic dipole antennas (6 dBi at the low end to 8 dBi on the high end) and high power handing capabilities (500W) to accommodate a broad range of both immunity and emissions test requirements. Enhanced gain over competitive designs Robust mechanical and feed design Individually calibrated according to ANSI C63.5 with signed certificate of calibration

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