Overview
The stacked Logarithmic Periodic Dipole Antenna consists of two ordinary Log.-Per. structures. The excellent characteristics (flat gain over a large bandwidth, low SWR) of the ordinary Log.-Per. designs could be maintained using the stacked LP design. The stacked design helps to focus the directional pattern of the H-plane somewhat, resulting in a typical gain improvement of ca. 2-3 dB compared to an ordinary LPDA.
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 STLP 9128 C has an excellent cross-polar rejection.
| Schwarzbeck STLP 9128 C Specifications | |
| Nominal Frequency Range | 200 MHz...1.5 GHz |
| Usable Frequency Range | 150 MHz ... 4 GHz |
| Isotropic Gain | 9 ... 10 +/- 1dBi |
| Antenna Factor | 8 ... 24 dB/m |
| Nominal Impedance | 50 Ω |
| Standing Wave Ratio SWR typical | <1.5 |
| Front to Back Ratio | > 16 dB |
| Cross Polarization | >30 dB (200 MHz...1 GHz) |
| 3 dB Beamwidth typ. (E-Plane) | 64°-53° |
| 3 dB Beamwidth typ. (H-Plane) | 63°-44° |
| Connector (female) | 7/16 N |
| Max. Input Power (7/16) | 3 kW (intermitt.) 2 kW (cont.) |
| Max. Input Power (N) | 2 kW (intermitt.) 1 kW (cont.) |
| Mount | 22 mm Rohr / Tube |
| Width x Length x Height | 930 x 890 x 940 mm |
| Weight | 4.6 kg |
