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BS450XL4.5 (4.5 dBd UHF)

4.5 dBd UHF Base Station Antenna


The BS450XL4.5 is a configurable 4.5 dBd UHF base station antenna with five tuned configurations across 406–512 MHz for fixed radio sites.

Key Features

  • Balances 4.5 dBd gain with a 30° vertical beam.
  • Matches UHF channel plans through five tuned configurations.
  • Handles up to 250 W for base-station or repeater equipment.
  • Installs on poles or masts with optional BSMNT2 hardware.

Customization: Cable type, cable length, and connectors can be configured for specific installation requirements.

Product Description

BS450XL4.5 provides tuned 406–512 MHz coverage for fixed UHF base station and repeater installations in the slim BS mechanical format.

Frequency-Specific Selection: Each available configuration is tuned to a defined portion of the series range, allowing selection around the site’s assigned UHF channels.

Coverage Pattern: Its 4.5 dBd gain and 30° vertical beam balance focused coverage with useful elevation tolerance.

Outdoor Mechanical Package: A 1 in (2.54 cm) UV-inhibited fiberglass radome and 1.35 in (3.43 cm) epoxy-coated aluminum sleeve keep the antenna profile narrow for fixed installations. The assembly carries a 125 mph (201 km/h) wind rating.

Power and Connection: The antenna handles up to 250 W and uses an N female RF connection. Compatible clamp-style mounting hardware is available for pole and mast installations.

Ideal Applications

  • 450 MHz fixed radio networks
  • UHF base station and repeater sites
  • Pole- and mast-mounted communications infrastructure

Example Model Configurations: BS450XL4.5-A, BS450XL4.5-B, BS450XL4.5-BC, BS450XL4.5-C, BS450XL4.5-D, BS450XL4.5-DE, BS450XL4.5-E

Key Specifications

Feature Specification
Technology UHF LMR
Frequency

UHF LMR: 406-512 MHz by configuration

Gain

UHF LMR: 4.5 dBd

Configuration 1 RF feed
Connector / Cable

UHF LMR connector: N female standard; optional pigtail

Mounting Vertical pole or mast installation with a bracket kit
Dimensions 67 in long; 1.00 in radome diameter; 1.35 in sleeve diameter; 10 in sleeve length
Material

Housing: White UV-resistant fiberglass, 1.00 in diameter

Base: Epoxy-coated heavy-wall aluminum sleeve

VSWR

UHF LMR: <2:1 across more than 20 MHz

Maximum Input Power

UHF LMR: 250 W

Environmental Rating / Qualifications

Wind rating: 125 mph; 18.6 lb lateral load; 0.275 ft² flat-plate equivalent

Models & Configurations

Model / Configuration Configuration Details
BS450XL4.5-A 406-430 MHz; 4.5dBd gain
BS450XL4.5-B 430-450 MHz; 4.5dBd gain
BS450XL4.5-BC 445-465 MHz; 4.5dBd gain
BS450XL4.5-C 450-480 MHz; 4.5dBd gain
BS450XL4.5-D 470-490 MHz; 4.5dBd gain
BS450XL4.5-DE 480-500 MHz; 4.5dBd gain
BS450XL4.5-E 490-512 MHz; 4.5dBd gain

Tech Documents & Resources

BS450XL4.5mm

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