CW1440 RF Antenna Equivalent & Substitute Parts

Part Overview

The CW1440 is a 159MHz whip straight RF antenna manufactured by TE Connectivity Laird, designed for VHF applications in the 144MHz to 174MHz frequency band. This component features an NMO base mount termination and delivers 3dB gain with a maximum power rating of 200W. The product is currently classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and component sourcing in legacy installations.

Substiute Parts

CW1440

TE Connectivity LairdIn Stock: 847CW1440 Datasheet

Current PartRFQ

EM-MX5152-MP

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CW1440 is determined by strict alignment of electrical and mechanical parameters within the VHF antenna category. The following criteria establish substitution validity:

Critical Substitution Parameters:

• Frequency Group classification (VHF)
• Frequency range overlap with the 144MHz to 174MHz band
• Antenna type (whip, straight configuration)
• Termination type (NMO connector)
• Mounting method (base mount)

Performance Parameters:

• Gain specification (3dB or equivalent)
• Power handling capacity (minimum 200W or higher)
• VSWR or return loss characteristics

The identified substitute EM-MX5152-MP from Nearson Inc. satisfies the critical mechanical and electrical substitution criteria through matching frequency group classification, antenna type, termination, and mounting configuration. Frequency band overlap occurs within the 152MHz to 162MHz range, which encompasses the CW1440 center frequency of 159MHz.

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration - Product Status: The CW1440 is classified as obsolete. The EM-MX5152-MP is an active product currently manufactured by Nearson Inc., ensuring ongoing availability and supply chain continuity for new installations and component replenishment.

Mechanical Compatibility: Both components share identical mechanical interfaces: NMO termination and base mount configuration. Direct physical substitution is feasible without modification to mounting hardware or connector adapters.

Electrical Performance Variance: The EM-MX5152-MP operates at a center frequency of 157MHz compared to the CW1440 at 159MHz, representing a 2MHz offset. The frequency range of 152MHz to 162MHz encompasses the CW1440 center frequency, permitting operation within the original system bandwidth. However, the EM-MX5152-MP gain specification of 2dBi is 1dB lower than the CW1440 at 3dB, and maximum power handling is rated at 100W versus 200W for the CW1440.

Compliance and Certification: The EM-MX5152-MP carries RoHS compliance certification and is classified under ECCN EAR99, indicating standard commercial export classification. The CW1440 is classified under ECCN 5A991G.

Application Suitability: Selection of EM-MX5152-MP is appropriate for applications where the reduced gain and power handling do not exceed system requirements. Systems requiring the full 200W power capacity or 3dB gain specification of the CW1440 may require alternative evaluation.

Frequently Asked Questions (FAQ)

Q: Can the EM-MX5152-MP directly replace the CW1440 without modification?

A: Yes, direct mechanical substitution is possible. Both components feature NMO termination and base mount configuration, eliminating the need for adapter hardware or mounting modifications. However, electrical performance differences must be evaluated against system requirements.

Q: What is the frequency compatibility between these two antennas?

A: The CW1440 operates across 144MHz to 174MHz with a 159MHz center frequency. The EM-MX5152-MP operates across 152MHz to 162MHz with a 157MHz center frequency. The EM-MX5152-MP frequency range is fully contained within the CW1440 range, with a 2MHz center frequency offset. Both antennas function within the VHF band and share overlapping operational frequencies.

Q: How do the gain specifications differ?

A: The CW1440 provides 3dB gain, while the EM-MX5152-MP provides 2dBi gain, representing a 1dB difference. This variance affects signal transmission and reception efficiency. Applications requiring maximum gain should account for this reduction in performance.

Q: What is the power handling difference?

A: The CW1440 is rated for maximum 200W power input, while the EM-MX5152-MP is rated for 100W. Systems operating at power levels exceeding 100W require verification that the EM-MX5152-MP meets application requirements.

Q: Why is the CW1440 listed as obsolete?

A: Obsolete status indicates the manufacturer (TE Connectivity Laird) has discontinued production. The EM-MX5152-MP, classified as active, is currently manufactured and represents an available alternative for ongoing component sourcing.

Q: Are there packaging differences between these components?

A: The CW1440 packaging is listed as unspecified in available documentation. The EM-MX5152-MP is supplied in bulk packaging. Confirm packaging requirements with your procurement specifications.

Q: What compliance certifications apply to each component?

A: The EM-MX5152-MP carries RoHS compliance certification. The CW1440 compliance status is not specified in available data. The EM-MX5152-MP is classified under ECCN EAR99 (standard commercial), while the CW1440 is classified under ECCN 5A991G.

Q: Is VSWR data available for the EM-MX5152-MP?

A: VSWR specification is not provided in the EM-MX5152-MP documentation. The CW1440 specifies VSWR of 2. Contact the manufacturer for EM-MX5152-MP impedance matching characteristics if this parameter is critical to your application.