The SPO series is a range VHF UHF wideband omni antennas with various gain options for pole-mounting deployments in outdoor applications
The SPO series from Sirio is a range of VHF UHF wideband omni antennas designed for land-based applications.
In the VHF range, there are 2 models available based on the antenna gain (0 dBd and 3 dBd versions). They are designed to work without a groundplane and depending on the gain support a range of frequencies.
The SPO-145-2 (0 dBd/2.15 dBi gain) supports 145-175 MHz.
The 3 dBd versions support the following frequencies:
SPO-135-5: 135-147 MHz
SPO-145-5: 145-160 MHz
SPO-150-5: 150-165 MHz
SPO-158-5: 158-175 MHz
In the UHF range, there are 3 models available based on the antenna gain (0 dBd, 3 dBd, and 6 dBd gain versions). They are designed to work without a groundplane and depending on the gain support a range of frequencies.
The SPO-380-2 (0 dBd/2.15 dBi gain) supports 380-470 MHz.
The SPO-380-5 (3 dBd/5.15 dBi gain) supports 380-430 MHz.
The SPO-420-5 (3 dBd/5.15 dBi gain) supports 420-470 MHz.
The 6 dBd versions support the following frequencies as follows:
SPO-380-8: 380-406 MHz
SPO-400-8: 400-430 MHz
SPO-420-8: 420-450 MHz
SPO-440-8: 440-470 MHz
The SPO Series are manufactured to withstand the worst weather conditons with a fibreglass radome. The mounting hardware is made of stainless steel. The SPO antennas are designed for mast-mount applications.
For marine antennas, you could consider the UHF43 and related marine omni products from Scan.