STLP 9128 D - Stacked Log Periodic Antenna

  • STLP 9128 D - Typical Antenna Factor
  • STLP 9128 D - Typical Antenna Gain
  • Schwarzbeck STLP 9128D

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 D 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.


Frequency Range:

(65)80-3000(4000) 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: 1460 mm
Width: 1850 mm
Height 2000 mm
Weight: 8.1 kg
Mounting: 22 mm diameter tube


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


Recommended Adapter: AA 9209.



Datasheet STLP 9128 D

Radiation Pattern

Short Measuring Distances

Assembly of STLP Antennas