Description
Internal Tuning Duplexer for Compact Repeaters
Single-Antenna Operations for UHF Infrastructure
Streamline your wireless infrastructure footprint by enabling your repeater to transmit and receive simultaneously through a single antenna feedline.
Consolidate your hardware footprint at your station site by employing a specialized internal radio frequency filtering component. This commercial-grade duplexer manages high-isolation signal routing across the core UHF spectrum. By allowing a single transceiver setup to process incoming and outgoing voice traffic at the exact same time over one coaxial transmission line, this module removes the logistical need to install, space out, and maintain two separate external antennas. The Motorola HKFE4001A is the updated version of the Motorola HKFE4001.
Tailored to preserve the compact physical size of your low-power base station, the filter mechanism mounts cleanly right inside the primary equipment shell. The milled metal cavities deliver clean channel separation, preventing transmitter overflow from overwhelming the receiver circuit. This heavy-duty shielding ensures maximum sensitivity and coverage range even during prolonged communication windows in unventilated equipment closets or outdoor utility enclosures.
Integrating this component maintains uncompromised performance across your localized coverage area without degrading signal strength. Because the module fits entirely within the pre-existing housing layout, the upgrade preserves all original weatherproofing characteristics when sealed properly with factory gaskets. This component provides an exceptionally practical option for space-restricted environments like mobile emergency command trailers, industrial roof structures, and remote solar stations.
Key Features & Benefits
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Single Antenna Optimization: Integrates transmit and receive paths onto one coaxial cable, lowering structural antenna lease overhead.
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High RF Isolation: Delivers exceptional frequency separation across the 430–480 MHz band to prevent cross-channel interference.
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Direct Internal Mounting: Installs cleanly inside the repeater chassis enclosure to maintain a space-saving, low-profile architecture.
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Low Insertion Loss: High-efficiency cavity engineering prevents signal degradation, ensuring maximum transmitter power reaches the airwaves.
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Industrial-Grade Reliability: Thermally stable metal housing withstands fluctuating temperatures inside sealed outdoor infrastructure housings.
Specifications
| Attribute |
Details |
| Brand |
Motorola Solutions |
| Model/SKU |
Motorola HKFE4001A (HKFE4001) |
| Product Type |
Internal Cavity Duplexer |
| Frequency Band |
UHF (430–480 MHz) |
| Mounting Location |
Internal Chassis |
| Device Compatibility |
Low-Power Infrastructure Base Stations |
Recommended Accessories
- Motorola SLR1000 MOTOTRBO Compact Repeater - Motorola SLR1000 — The primary compact infrastructure repeater that houses this internal duplexer for single-antenna operations.
More Resources
Frequently Asked Questions
What specific frequency range does this duplexer support?
The HKFE4001A is designed to operate within the UHF band, covering frequencies from 430 MHz to 480 MHz, and must be precisely tuned to your specific TX and RX frequencies.
Does this duplexer come pre-tuned from the factory?
No. Cavity duplexers must be manually benched-tuned using a network analyzer to match your organization's exact FCC-licensed frequencies before deployment to avoid equipment damage.
Can I install this module myself inside the SLR1000?
Yes, it is designed for direct internal integration. However, because it requires specialized RF jumper routing and precise alignment tuning, installation by a certified radio communications technician is strongly recommended.
Warranty
1-year manufacturer's warranty.
