STLP 9128 E special - Stacked Log Periodic Antenna

  • STLP 9128 E special - Typical Antenna Factor
  • STLP 9128 E special - Typical Antenna Gain
  • Schwarzbeck STLP9128E special Double Stacked Log-Per Antenna
  • Schwarzbeck STLP9128E special without the rear part of the Antenna

 The STLP 9128 E special is nearly identical like the STLP 9120 E but with folded longest elements and smaller structure angle.


The stacked Log Periodic Dipole Antenna (Stacked LPDA) consists of two ordinary Log.-Per. structures. The excellent characteristics (flat gain over a large bandwidth, low SWR) of the ordinary LPDA designs could be maintained using the stacked LPDA design. The stacked design helps to focus the directional pattern of the H-plane somewhat, resulting in a typical gain improvement of 2.5 dB compared to an ordinary LP antenna. This is especially important for immunity testing, where a maximum fieldstrength and a good field uniformity is required. The beamwidth in the E-plane and the H-plane are nearly identical, providing an optimised illumination of the EuT with minimised ground reflection influence.Further the cross polar rejection of the STLP 9128 E special is excellent. The fastlinks allows to disassemble the rear elements without any need for further tools within a few seconds. These fastlinks divide the antenna into five parts, which can be stored and transported easily.

Main Application: Generation of defined high field strength levels for radiated immunity testing.


Frequency Range:

80-1700(2700) MHz



Pattern Type:




Max Power (7/16):

2 kW (const.)

3 kW (intermitt.)

Max Power (N):

1 kW (const.)

1.5 kW (intermitt.)


Type 7/16 female

Type N female

Impedance: 50 Ohms nominal


Length: 1738 mm
Width: 1404 mm
Height 1499 mm
Weight: 9.8 kg
Mounting: 22 mm diameter tube


[fastlinks.pdf] for quick removal of the rear parts of the antenna.


Recommended Adapter: AA 9209.


pdficon small Datasheet STLP 9128 E special

Radiation Pattern

Short Measuring Distances

pdficon small VSWR

Assembly of STLP Antennas