B4844-R Equivalent & Substitute Parts

Part Overview

The B4844-R is a 2.4GHz Blade RF Antenna manufactured by Antenova, designed for Bluetooth, WiMedia™, WLAN, and Zigbee™ applications. It features an SMA Male Reverse Thread connector with 2.2dBi gain and operates across the 2.4GHz to 2.5GHz frequency band. The product is currently obsolete, making identification of functionally equivalent alternatives essential for system redesign, legacy support, or component sourcing.

Substiute Parts

B4844-R

AntenovaIn Stock: 768B4844-R Datasheet

Current PartRFQ

S152AH-2450S

Nearson Inc.In Stock: 697S152AH-2450S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the B4844-R is determined by the following critical parameters:

Frequency Compatibility: The substitute must operate within the 2.4GHz to 2.5GHz band to maintain RF performance across Bluetooth, WLAN, and Zigbee™ applications.

Connector Type: The SMA Male termination is a primary mechanical interface requirement. Reverse Thread specification on the B4844-R is a specific variant; substitutes with standard SMA Male connectors are functionally compatible if the application permits connector type variation.

Antenna Form Factor: The Blade antenna type on the B4844-R is optimized for panel-mount applications with minimal height (48.30mm). Substitutes with different form factors (Whip, Tilt) may require mechanical redesign of the mounting interface.

Electrical Performance: VSWR (1.6) and Return Loss (-13dB) define impedance matching characteristics. Substitutes must maintain comparable RF efficiency within the operating band.

Mounting Interface: Panel Mount on the B4844-R differs from Connector Mount alternatives, requiring evaluation of physical integration feasibility.

The S152AH-2450S meets frequency band and connector requirements but introduces form factor and mounting differences that require engineering assessment.

Parameter Comparison

Engineering Selection Recommendations

Frequency Band Compatibility: Both the B4844-R and S152AH-2450S operate within the 2.4GHz to 2.5GHz band, supporting Bluetooth, WLAN, and Zigbee™ protocols. Frequency-based substitution is viable.

Connector Interface: The B4844-R uses SMA Male Reverse Thread; the S152AH-2450S uses RP-SMA Male. These are distinct connector types. Mechanical adapter solutions or PCB redesign may be required to accommodate the S152AH-2450S.

Form Factor and Mounting: The B4844-R is a low-profile Blade antenna (48.30mm) with Panel Mount integration. The S152AH-2450S is a Whip/Tilt antenna (137.00mm) with Connector Mount. This represents a significant physical redesign requirement. Space constraints and mounting architecture must be re-evaluated.

Electrical Performance: The S152AH-2450S provides higher gain (4dBi vs. 2.2dBi) and slightly higher VSWR (2 vs. 1.6). The gain increase may improve link budget but introduces different impedance characteristics. System-level RF simulation is recommended to validate performance equivalence.

Product Status and Compliance: The S152AH-2450S is Active and RoHS Compliant, providing supply chain continuity and regulatory alignment. The B4844-R is Obsolete, necessitating alternative sourcing.

Frequently Asked Questions (FAQ)

Q: Can the S152AH-2450S directly replace the B4844-R without modifications?

A: Direct mechanical replacement is not possible. The S152AH-2450S uses RP-SMA Male termination versus SMA Male Reverse Thread on the B4844-R, and employs Connector Mount versus Panel Mount. Connector adapter or PCB redesign is required. Additionally, the form factor differs significantly (137.00mm vs. 48.30mm height), requiring mechanical re-integration.

Q: Are the RF performance characteristics equivalent?

A: Both antennas operate within the 2.4GHz to 2.5GHz band. However, the S152AH-2450S exhibits higher gain (4dBi vs. 2.2dBi) and higher VSWR (2 vs. 1.6). These differences affect impedance matching and link budget. RF performance equivalence must be validated through system-level testing or simulation.

Q: What is the significance of the connector type difference?

A: SMA Male Reverse Thread and RP-SMA Male are mechanically and electrically distinct connectors. RP-SMA (Reverse Polarity SMA) has reversed pin and socket geometry. Mating with incorrect connector types results in physical damage or non-functional connections. Adapter solutions or connector replacement on the PCB is mandatory.

Q: Does the higher gain of the S152AH-2450S provide better performance?

A: Higher gain (4dBi vs. 2.2dBi) increases effective radiated power in the antenna's radiation pattern. However, this does not guarantee system-level performance improvement without considering impedance matching (VSWR), mounting environment, and application-specific requirements. Gain alone is not a substitution criterion.

Q: Is the S152AH-2450S suitable for the same applications as the B4844-R?

A: Both antennas support 2.4GHz band applications including Bluetooth, WLAN, and Zigbee™. However, application suitability depends on mechanical integration feasibility, connector compatibility, and RF performance validation in the target system. Form factor constraints may eliminate the S152AH-2450S from space-limited applications.

Q: What compliance considerations apply to substitution?

A: Both parts carry ECCN EAR99 classification. The S152AH-2450S is RoHS Compliant, providing regulatory alignment with modern environmental standards. The B4844-R's compliance status is not specified. Regulatory requirements of the end application must be verified.