Product Description

100–600 MHz Wideband Black Fiberglass Omni Antenna, Hex N-Male, with Mount, KSANT-11835-A

The moment a receiver has to sweep across the upper HF, VHF and lower UHF bands, the mast fills up. Monitoring stations, wideband receivers and multi-band scanners all expect one radiator that covers the whole low spectrum, 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 100–600 MHz Wideband Black Fiberglass Omni Antenna, model KSANT-11835-A, an 800 mm linear-polarized radiator engineered for wideband reception, monitoring and multi-band radio.

This antenna represents a deliberate trade: coverage instead of gain. Its core advantage is the 100–600 MHz span in a single 800 mm radome of 38 mm diameter, finished in glossy black and terminated in a hex N-male connector. The whole span is covered at 50 Ohm with VSWR under 2.5, measured gain runs from -5 to -1 dBi across the band, and the horizontal pattern is a full 360° with roundness held to ±1 dB. Power handling is 50 W, the element is DC grounded, and the build is rated for wind of 36.9 m/s across −45 °C to +85 °C. It ships with an L-bracket and U-bolts, so the mast mount is part of the box rather than a separate purchase.

Technical Excellence: The Core Advantage

The antenna's performance rests on three pillars: a 6:1 frequency span in one part, an unusually round horizontal pattern, and a mount that ships in the same box.

A 6:1 Frequency Span in One Radome

The design covers 100 to 600 MHz, which takes in the upper HF band, the whole VHF band and the lower UHF band 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 800 mm radome feeds the receiver. Measured efficiency holds around 22% across the band, and peak gain runs -5 to -1 dBi, which is the realistic figure for a broadband non-resonating radiator rather than a resonant narrowband one. It is built for listening and scanning, not for a high-gain point-to-point link, and the datasheet says so plainly.

Roundness Held to ±1 dB Across the Span

A wideband antenna usually gets away with a loose roundness tolerance, because its electrical behaviour changes with frequency. This one is specified at ±1 dB, and the chamber measurements back it up: 0.33 dB at 100 MHz, 0.96 dB at 350 MHz and 0.51 dB at 600 MHz. That is a genuinely round pattern across 100 to 600 MHz, which matters when the signal can arrive from any azimuth and the receiver cannot rotate the mast to compensate. Impedance is 50 Ohm nominal throughout, so no tuning network is needed between the antenna and the receiver.

VSWR Under 2.5 and a Mount That Ships in the Box

The specified match is VSWR <2.5 across the span, and the stored trace marks 1.52 at 100 MHz and 1.93 at 600 MHz, with return loss of 13.7 dB and 10.0 dB at those two points. That is a controlled match across the whole sweep, with the expected rise only at the upper edge. Maximum power is 50 W, which covers wideband receivers and low-power transmitters. The connector is a hex N-male, the flat-hex body that a wrench grips instead of twisting the radome. The element is DC grounded so static charge drains to the mast. The radome is 38 mm in diameter and 800 mm long, glossy black, and weighs 0.98 kg. The box includes an L-bracket, two U-bolts, M6 hex nuts, spring washers and flat washers, so the antenna mounts to a pole or a wall out of the box. 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 100–600 MHz span, a round 360° pattern and a mount in the box makes this antenna useful wherever one mast has to listen across the low spectrum.

Wideband Receiving and Monitoring

Wideband receivers and spectrum scanning: monitoring stations need one feed across the band they sweep, and this antenna delivers a single feedline from 100 MHz to 600 MHz instead of swapping antennas per band.

Signal intelligence and measurement: field teams that move across frequency bands use one known radiator, and the ±1 dB roundness keeps the azimuth reading honest everywhere around the mast.

VHF and UHF Multi-Band Radio

Multi-band receivers 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 Fixed and Mobile Sites

Fixed and temporary sites: the included L-bracket and U-bolts bolt straight to a pole or wall, and the −45 °C to +85 °C range covers unattended outdoor cabinets.

Vehicle and portable mounts: the 0.98 kg weight and glossy black finish suit vehicle roofs and portable masts where quick deployment and recovery matter.

Conclusion: The Future of Wideband Low-Band Listening

The 100–600 MHz Wideband Black Fiberglass Omni Antenna, KSANT-11835-A, is more than a passive component. It is the part that turns a multi-antenna receiving mast into a single feed. By covering 100–600 MHz at 50 Ohm with VSWR <2.5, holding a roundness of ±1 dB across a full 360°, and shipping 50 W behind a hex N-male connector with the L-bracket and U-bolts in the same box, it gives integrators a clean mast for complex low-band radio environments. Its measured gain of -5 to -1 dBi is the honest price of a 6:1 span, and the datasheet states it directly rather than dressing it up. The 800 mm radome in glossy black, 0.98 kg weight, 36.9 m/s wind rating and −45 °C to +85 °C operating range make it deployable in the field. For any system that needs one antenna from 100 MHz to 600 MHz, this antenna is the practical choice.