300–3000 MHz Ultra-Wideband Black Fiberglass Omni Antenna, N-Male, KSANT-12088-A

The moment a radio system has to cover more than a single band, the mast fills up. Wideband receivers, multi-band radios and test equipment all expect one radiator that sweeps from the low VHF through UHF and into the 2.4 GHz range, and the demand for that one antenna has never been higher. Integrators are constantly challenged to keep the mast clean, because every extra antenna adds a feed, a clamp, a lightning path and a maintenance point. The solution lies in a single wideband fiberglass radiator that trades narrowband peak gain for an enormous frequency range. We are proud to introduce the 300–3000 MHz Ultra-Wideband Black Fiberglass Omni Antenna, model KSANT-12088-A, a 400 mm linear-polarized radiator engineered for wideband monitoring, multi-band radio and test use.

This antenna represents a deliberate trade: coverage instead of gain. Its core advantage is the 300–3000 MHz span in a single 400 mm radome of 38 mm diameter, finished in elegant black and terminated in an integrated N-male connector. The whole span is covered at 50 Ohm with VSWR under 3.0, measured gain runs from 1 to 5 dBi across the band, and the horizontal pattern is a full 360°. Power handling is 100 W, the element is DC grounded, and it is rated for wind of 36.9 m/s across −45 °C to +85 °C. It is the practical choice for equipment that expects one feed for the whole low spectrum.

Technical Excellence: The Core Advantage

The antenna's performance rests on three pillars: a 10:1 frequency span in one part, a match that stays controlled across it, and a slim black radome for real installations.

A 10:1 Frequency Span in One Radome

The design covers 300 to 3000 MHz, which takes in the upper VHF band, the whole UHF band and the 2.4 GHz range in a single part. That is the headline trade of a wideband antenna: instead of three or four masts at three or four resonant bands, one 400 mm radome feeds the radio. Measured efficiency rises from 49.8% at 300 MHz to about 77% on average across the band, which is the realistic figure for a broadband non-resonating radiator rather than a resonant narrowband one. Peak gain runs 1.1–4.9 dBi, which is the honest price of a 10:1 span, and the datasheet says so plainly.

VSWR Under 3.0 Across the Whole Span

Keeping a controlled match from 300 to 3000 MHz is the hard part. The datasheet specifies VSWR <3.0 across the span, and the stored trace shows the actual behaviour: 2.60 at 300 MHz, 1.28 at 433 MHz, 1.12 at 960 MHz, 1.59 at 1.7 GHz, 1.05 at 2.7 GHz and 1.84 at 3.0 GHz. That means the antenna is well matched across most of the band, with the expected rise only at the two band edges, which is exactly what a wideband receiver or transmitter sweeps against. Impedance is 50 Ohm nominal throughout, so no tuning network is needed between the antenna and the radio.

1–5 dBi on a 400 mm Black Radome with an N-Male Feed

The radome is 38 mm in diameter and 400 mm long, finished in elegant black, and weighs 0.5 kg. The vertical beamwidth is 13–19°, and the horizontal pattern is a full 360°. Roundness is specified at ±5.5 dB, which is the honest tolerance for a broadband antenna that changes its electrical behaviour with frequency; measured roundness is 1.32 dB at 400 MHz, 5.78 dB at 1500 MHz and 1.12 dB at 3000 MHz. Maximum power is 100 W, which covers wideband transmitters and multi-carrier radios. The connector is an integrated N-male, the standard threaded interface on a mast, and the element is DC grounded so static charge drains to the mast. Mechanical qualification is stated rather than assumed: a ≥200 N tensile test, a 1 m drop test, vibration from 10–55 Hz at 0.35 mm displacement and 50.0 m/s² over 30 sweep cycles, and voltage resistance of 1.5 kV insulation, 1.5 kV sheath and 0.5 kV insulation-to-sheath. The product is RoHS compliant.

Versatile Application Scenarios

The combination of a 300–3000 MHz span and a single N-male feed makes this antenna useful wherever one mast has to serve many bands.

Wideband Monitoring and Scanning

Wideband receivers and spectrum scanning: monitoring stations need a flat feed across the band they sweep, and this antenna delivers one feedline for the whole scanner range from 300 MHz to 3 GHz.

Signal intelligence and measurement sites: field teams that move across frequency bands use one known radiator instead of swapping antennas per band.

Multi-Band Radio and Test

Multi-band radios and scanners: fleets, public-safety installations and test ranges run several bands at once, and one radome replaces an antenna farm.

EMC and laboratory support: laboratories use a single known wideband radiator for radiated testing and measurement across the low spectrum.

Outdoor and Roof Installations

Fixed and temporary sites: the 0.5 kg weight and 400 mm length let the antenna mount on a pole, a wall plate or a temporary mast, and the −45 °C to +85 °C range covers unattended outdoor cabinets.

Mobile and vehicle mounts: the black radome and N-male feed suit vehicle roofs and portable masts where quick deployment and recovery matter.

Conclusion: The Future of Wideband Low-Spectrum Coverage

The 300–3000 MHz Ultra-Wideband Black Fiberglass Omni Antenna, KSANT-12088-A, is more than a passive component. It is the part that turns a multi-antenna mast into a single feed. By covering 300–3000 MHz at 50 Ohm with VSWR <3.0, holding a full 360° pattern, and delivering 100 W behind an integrated N-male connector on a 400 mm black radome, it gives integrators a clean mast for complex radio environments. Its measured gain of 1–5 dBi is the honest price of a 10:1 span, and the datasheet states it directly rather than dressing it up. The 0.5 kg weight, 36.9 m/s wind rating and −45 °C to +85 °C operating range make it deployable in the field. For any radio that needs one antenna from 300 MHz to 3 GHz, this antenna is the practical choice.