CWB1440 RF Antenna Equivalent & Substitute Parts

Part Overview

The CWB1440 is a 159MHz VHF whip antenna manufactured by TE Connectivity Laird, designed for base mount applications with NMO termination. This antenna operates across the 144MHz to 174MHz frequency band and delivers 3dB gain with a maximum power rating of 200W. The product is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and component procurement.

Substiute Parts

CWB1440

TE Connectivity LairdIn Stock: 948CWB1440 Datasheet

Current PartRFQ

EM-MX5152-MP

Nearson Inc.In Stock: 1075EM-MX5152-MP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CWB1440 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Frequency Group: VHF (f < 300MHz)
• Antenna Type: Whip, Straight configuration
• Termination: NMO connector
• Mounting Type: Base Mount
• Number of Bands: Single band operation

Operational Compatibility Criteria:

• Frequency Range overlap with 144MHz – 174MHz band
• Center frequency within or adjacent to 159MHz operating point
• Gain specification compatible with system requirements
• Power rating sufficient for application demands

The EM-MX5152-MP from Nearson Inc. satisfies all mandatory compatibility criteria. Its 152MHz – 162MHz frequency range overlaps substantially with the CWB1440 operating band, with a center frequency of 157MHz positioned 2MHz below the original specification. The antenna maintains identical form factor (whip, straight), termination (NMO), and mounting configuration (base mount).

Parameter Comparison

Engineering Selection Recommendations

CWB1440 (Primary Part – Obsolete Status)

The CWB1440 is no longer in active production. Existing inventory of 860 pieces is available as new original stock. This part should be selected only when legacy system compatibility or existing supply chain commitments require the original specification.

EM-MX5152-MP (Active Substitute)

The EM-MX5152-MP is the recommended substitute for new designs and ongoing procurement. This part maintains active product status with 975 pieces in current inventory. The antenna is RoHS compliant and carries EAR99 export classification, providing regulatory flexibility compared to the CWB1440's 5A991G ECCN designation.

Operational Considerations:

The EM-MX5152-MP operates within a narrower frequency range (152MHz – 162MHz) compared to the CWB1440 (144MHz – 174MHz). Applications requiring operation below 152MHz or above 162MHz must retain the CWB1440 or identify alternative solutions. The substitute part delivers 2dBi gain versus the original 3dB specification, representing a 1dB reduction in antenna efficiency. The maximum power rating of 100W for the EM-MX5152-MP is half that of the CWB1440; applications exceeding 100W continuous power must verify compatibility or maintain the original part.

Frequently Asked Questions (FAQ)

Q: Can the EM-MX5152-MP directly replace the CWB1440 in existing installations?

A: Physical and electrical compatibility is confirmed for the NMO connector and base mount configuration. However, operational compatibility depends on specific frequency requirements. If your system operates exclusively within the 152MHz – 162MHz band, direct substitution is viable. Systems requiring operation outside this range must retain the CWB1440.

Q: What is the impact of the 1dB gain difference between these antennas?

A: The CWB1440 provides 3dB gain while the EM-MX5152-MP provides 2dBi gain. This 1dB difference represents approximately 20% reduction in radiated power efficiency. For link budget calculations, account for this reduction in system margin.

Q: Are there power rating limitations with the EM-MX5152-MP?

A: Yes. The EM-MX5152-MP is rated for maximum 100W continuous power, compared to 200W for the CWB1440. Applications operating above 100W must either retain the original part or conduct thermal and performance validation with the substitute.

Q: What are the regulatory differences between these parts?

A: The CWB1440 carries ECCN 5A991G classification, while the EM-MX5152-MP carries EAR99 classification. The EM-MX5152-MP is RoHS compliant; RoHS status for the CWB1440 is not specified. Verify export and environmental compliance requirements for your application.

Q: How do the frequency ranges compare for my specific application?

A: The CWB1440 covers 144MHz – 174MHz with 159MHz center frequency. The EM-MX5152-MP covers 152MHz – 162MHz with 157MHz center frequency. The substitute provides full coverage for the 152MHz – 162MHz band but does not extend to the lower (144MHz – 151MHz) or upper (163MHz – 174MHz) portions of the original range.

Q: What packaging differences exist between these parts?

A: The CWB1440 packaging is listed as dash (standard). The EM-MX5152-MP is supplied in bulk packaging. Confirm packaging requirements for your procurement and assembly processes.