The STLP 9128D is a broadband log‑periodic dipole antenna designed by Schwarzbeck for high field strength and uniform coverage, suitable for IEC 61009‑4‑3 testing. Its stacked design improves H‑field directivity and offers excellent cross‑polarization suppression.
The manual lists key parameters such as frequency range, gain, antenna factor, VSWR, beamwidth, power handling, dimensions and installation details, and includes typical performance graphs for field strength and VSWR across the operating band. This manual is written in Chinese.
| Frequency range (nominal) | 80 MHz–3 GHz |
|---|---|
| Usable frequency range | 65 MHz–4 GHz |
| Gain | 2.0 dBi |
| Antenna factor | 2–30 dB/Am |
| Impedance | 50 Ω |
| Cross‑polarization suppression | >30 dB |
| 3 dB Beamwidth (E‑Plane) | 60°–75° |
| 3 dB Beamwidth (H‑Plane) | 50°–65° |
| Maximum continuous power (N‑type connector) | 1000 W |
| Dimensions | 1.85 m × 1.46 m × 1.955 m |
| Weight | 11 kg |
The antenna operates from 80 MHz to 3 GHz, with a usable range of 65 MHz to 4 GHz.
It can handle up to 1000 W with an N‑type connector and up to 2000 W with a 7/16" connector.
The antenna factor ranges from 2 dB/Am to 30 dB/Am.