RF Antenna 3910D-1M-SMA Equivalent & Substitute Parts

Part Overview

The PCTEL 3910D-1M-SMA is a 1.575GHz GPS module RF antenna designed for navigation applications operating in the UHF frequency band (1GHz ~ 2GHz). This antenna features a 1-meter cable with integrated LNA and filter, SMA termination, magnetic mounting, and IP67 ingress protection. The product is classified as obsolete, necessitating identification of active equivalent components that maintain functional compatibility for GPS receiver systems.

Substiute Parts

3910D-1M-SMA

PCTEL, Inc.In Stock: 11893910D-1M-SMA Datasheet

Current PartRFQ

3917D

PCTEL, Inc.In Stock: 8333917D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3910D-1M-SMA is determined by strict equivalence across the following critical parameters:

Frequency Compatibility: Center frequency of 1.575GHz with operating range 1.565GHz ~ 1.585GHz must be maintained for GPS L1 band reception.

Antenna Configuration: Module-type antenna with single-band operation and identical gain specifications (-2dBic, 3dBic).

Mechanical Interface: SMA termination type and magnetic mounting method must be preserved for physical and electrical connection compatibility.

Environmental Rating: IP67 ingress protection classification ensures equivalent environmental sealing.

Integrated Features: Presence of cable, LNA (Low Noise Amplifier), and filter components must be maintained for signal conditioning equivalence.

Physical Dimensions: Maximum height of 0.535" (13.60mm) ensures form factor compatibility.

The substitute part 3917D meets all these criteria while offering active product status and RoHS compliance.

Parameter Comparison

Engineering Selection Recommendations

The 3917D serves as the direct substitute for the obsolete 3910D-1M-SMA based on electrical and mechanical parameter equivalence. Both antennas operate at identical center frequency (1.575GHz) with matching frequency range, gain specifications, and physical dimensions. The SMA Male termination on the 3917D is compatible with standard SMA connectors used in GPS receiver systems.

The 3917D offers two significant advantages over the main part:

Product Status: The 3917D maintains active product status with current manufacturing support, ensuring long-term availability and supply chain continuity.

Regulatory Compliance: The 3917D is RoHS Compliant, meeting current environmental and hazardous substance restrictions applicable to electronic components in regulated markets.

The primary difference between parts is cable length: the 3910D-1M-SMA includes a 1-meter cable, while the 3917D provides a 3-meter cable. This extended cable length offers greater installation flexibility without requiring external cable extensions. Both parts maintain identical LNA and filter integration for equivalent signal conditioning performance.

Frequently Asked Questions (FAQ)

Q: Can the 3917D directly replace the 3910D-1M-SMA in existing GPS receiver systems?

A: Yes. Both antennas operate at 1.575GHz with identical frequency range (1.565GHz ~ 1.585GHz), matching gain specifications, and compatible SMA termination. The magnetic mounting and IP67 environmental rating are identical. The 3917D is electrically and mechanically equivalent for GPS L1 band reception applications.

Q: What is the significance of the cable length difference between these parts?

A: The 3910D-1M-SMA includes a 1-meter integrated cable, while the 3917D provides a 3-meter cable. The extended cable length in the 3917D allows for greater separation between the antenna and receiver without requiring external cable extensions. Both cables support identical signal conditioning through integrated LNA and filter components.

Q: Are the SMA terminations on both parts compatible?

A: Yes. The 3910D-1M-SMA specifies SMA termination, and the 3917D specifies SMA Male termination. Standard SMA connectors are compatible with SMA Male connectors in GPS receiver systems. No adapter or modification is required.

Q: Why is the 3910D-1M-SMA classified as obsolete?

A: Product obsolescence indicates that PCTEL has discontinued manufacturing of this model. The 3917D represents the active equivalent, ensuring continued availability and support for GPS antenna applications requiring 1.575GHz operation.

Q: Does the 3917D meet current regulatory requirements?

A: Yes. The 3917D is RoHS Compliant, meeting current environmental and hazardous substance restrictions. The 3910D-1M-SMA does not specify RoHS status. For applications requiring RoHS compliance, the 3917D is the appropriate selection.

Q: Are the gain specifications identical between both parts?

A: Yes. Both the 3910D-1M-SMA and 3917D specify gain of -2dBic and 3dBic. The order of specification differs, but the values are identical, ensuring equivalent antenna performance for GPS signal reception.

Q: What applications are supported by the 3917D?

A: The 3917D supports GNSS (Global Navigation Satellite System) and GPS applications. The 3910D-1M-SMA specifies GPS applications. The 3917D's broader application range reflects support for multiple satellite navigation standards while maintaining full GPS compatibility.