The VULP 9118 D is a polarized log-periodic antenna
VULP 9118 D - Log Periodic AntennaVULP 9118 D Special - Log Periodic Antenna w/ Folded Long Elements
Insertion of an attenuator is advisable if the equipment presents a high internal SWR (e.g. in the 0 dB position of an internal step attenuator. In this case, the attenuation must be added to the antenna factor (dB/m) or subtracted from the gain (dBi, dBd). The VSWR depends on antenna height, polarisation, cable dropdown, and other environmental parameters. |