Schwarzbeck Wireless Test Log Periodic Antennas

ESLP 9145 - Microwave Wireless Log Periodic Antenna

1 - 18 GHz

700 MHz to 20 GHz Usable

Frequency Range:	(0.7) 1 - 18 (20) GHz
Polarisation:	linear
Pattern Type:	directional
Max Power:	20 W
Connector:	Type N female
Impedance:	50 Ω nominal

Length:	0.50 m
Width:	0.24 m
Height:	0.04 m
Weight:	0.9 kg
Mounting:	22 mm tube
Recommended Adapter:	AA 9203 / AA 9202

A new low attenuation cover allows measurements with radome.

USLP 9143 B - Log Periodic Wireless Test Antenna

0.2 - 7 GHz

180 MHz to 8 GHz Usable

Frequency Range:	(180) 200 MHz - 7 (8) GHz
Polarisation:	linear
Pattern Type:	directional
Material:	Aluminium
Max Power:	200 W (<500 MHz)
Connector:	Type N female
Impedance:	50 Ω nominal

Length:	0.89 m
Width:	0.78 m
Height:	0.06 m
Weight:	1.2 kg
Mounting:	22 mm tube
Recommended Adapter:	AA 9203 / AA 9202

Datasheet USLP 9143B

Short Measuring Distance

USLP 9142 - Schwarzbeck Log Periodic Wireless Test Antenna

0.7 - 5 GHz

700 MHz to 8 GHz Usable

Frequency Range:	0.7 - 5 (8) GHz
Polarisation:	linear
Pattern Type:	directional
Material:	Aluminium
Max Power:	50 W
Connector:	Type N female
Impedance:	50 Ω nominal

Length:	46 cm
Width:	20 cm
Height:
Weight:	0.5 kg
Mounting:	22 mm tube
Recommended Adapter:	AA 9203 / AA 9202

Datasheet USLP 9142

Radiation Pattern

VUSLP 9111-1000 - Log Periodic Antenna

0.8 - 3 GHz

750 MHz to 4 GHz Usable

Frequency Range:	(0.75) 0.8 - 3 (4) GHz
Polarisation:	linear
Pattern Type:	directional
Max Power:	300 W (1 GHz)
Connector:	Type N female
Impedance:	50 Ω nominal

Length:	46 cm
Width:	22 cm
Height:	6.5 cm
Weight:	0.9 kg
Mounting:	22 mm tube
Recommended Adapter:	AA 9203 / AA 9202

Datasheet VUSLP 9111-1000

VUSLP 9111-400 - Schwarzbeck Log Periodic Wireless Test Antenna

0.4 - 3 GHz

340 MHz to 4 GHz Usable

Frequency Range:	(340) 400 MHz - 3 (4) GHz
Polarisation:	linear
Pattern Type:	directional
Max Power:	300 W (1 GHz)
Connector:	Type N female
Impedance:	50 Ω nominal

Length:	64 cm
Width:	45 cm
Height:	7 cm
Weight:	1.3 kg
Mounting:	22 mm tube
Recommended Adapter:	AA 9203 / AA 9202

Datasheet VUSLP 9111-400

Radiation Pattern

AA 9202

Mast Adapter for Antenna Mast System AM 9144 with 22 mm hole for most Antenna models.

3/8" and 1/4" camera threads

polarization continuously adjustable

Datasheet AA 9202

AA 9203

Mast Adapter for AM 9144 with 22 mm hole for most Antenna models

3/8" and 1/4" camera threads polarization and

elevation continuously adjustable

Datasheet AA 9203

The Log Periodic Dipole Antennas normally consists of a series of half wave dipole "elements" each consisting of a pair of metal rods, positioned along a support boom lying along the antenna axis. The elements are spaced at intervals following a logarithmic function of the frequency, known as d or sigma. The length of the successive elements and the spacing between them gradually decrease along the boom. The relationship between the lengths is a function known as tau. Sigma and tau are the key design elements of the LPDA design. The radiation pattern of the antenna is unidirectional, with the main lobe along the axis of the boom, off the end with the shortest elements. Each dipole element is resonant at a wavelength approximately equal to twice its length. The bandwidth of the antenna, the frequency range over which it has maximum gain, is approximately between the resonant frequencies of the longest and shortest element.

The elements are equipped with soft plastic caps to avoid injury and for optical reasons. Due to dielectric loss the soft plastic caps are heating up when the antenna is dissipating around 500 W of power. Occasionally the plastic caps get deformed or even damaged.

We recommend to remove all soft plastic caps if you plan to use more than 500 W. The influence of the plastic caps on electrical antenna data is negligible small in the specified frequency range.