WIH-AT-FA 916MHz RF Antenna Equivalent & Substitute Parts

Part Overview

The WIH-AT-FA is a 916MHz whip straight RF antenna manufactured by Thomas Research Products, featuring an RP-SMA male connector mount and a 610mm cable assembly. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and new design implementations.

The necessity to identify substitutes stems from the product's obsolete status, which may result in limited availability and extended lead times. Active equivalent parts from established manufacturers provide continuity for applications requiring 916MHz ISM band operation.

Key Parameters

Parameter	Value
Frequency (Center/Band)	916MHz
Frequency Group	UHF (300MHz ~ 1GHz)
Antenna Type	Whip, Straight
Termination	RP-SMA Male
Mounting Type	Connector Mount
VSWR	1.9
Height (Max)	2.008" (51.00mm)
Number of Bands	1

Substitute Part Grouping Explanation

Substitute parts for the WIH-AT-FA are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Frequency band alignment: 916MHz center frequency or overlapping frequency range encompassing 916MHz
Connector type: RP-SMA Male termination
Antenna configuration: Whip antenna topology
Mounting interface: Connector-based or adhesive mount systems
VSWR specification: 1.9 or better

Substitute Parts Identified:

ANT-916-CW-RH (TE Connectivity Linx) – Direct frequency-compatible substitute with identical connector type, VSWR, and mounting method. Frequency range 900MHz–935MHz encompasses the 916MHz operating point. Active product status ensures availability.
ANT-916-MHW-RPS-L (TE Connectivity Linx) – Frequency-compatible substitute with extended frequency range (816MHz–1.016GHz) and identical connector termination. Differs in antenna configuration (center-fed double vs. straight whip) and mounting method (adhesive vs. connector mount), requiring mechanical integration assessment.

Parameter Comparison

Parameter	WIH-AT-FA	ANT-916-CW-RH	ANT-916-MHW-RPS-L
Manufacturer	Thomas Research Products	TE Connectivity Linx	TE Connectivity Linx
Frequency (Center/Band)	916MHz	915MHz	916MHz
Frequency Range	Not specified	900MHz ~ 935MHz	816MHz ~ 1.016GHz
Antenna Type	Whip, Straight	Whip, Straight	Whip, Center-Fed Double
Termination	RP-SMA Male	RP-SMA Male	RP-SMA Male
Mounting Type	Connector Mount	Connector Mount	Adhesive
VSWR	1.9	1.9	1.9
Height (Max)	2.008" (51.00mm)	2.008" (51.00mm)	5.433" (138.00mm)
Gain	Not specified	-1.3dBi	5.4dBi
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	RoHS Compliant	RoHS Compliant

Engineering Selection Recommendations

ANT-916-CW-RH is the primary substitute for direct replacement applications. This part maintains identical mechanical form factor (2.008" height), connector interface (RP-SMA Male), mounting method (connector mount), and electrical performance (VSWR 1.9). The active product status ensures supply chain continuity. RoHS compliance provides regulatory advantage over the obsolete WIH-AT-FA.

ANT-916-MHW-RPS-L serves as an alternative for applications where increased antenna gain (5.4dBi vs. unspecified) and extended frequency coverage (816MHz–1.016GHz) provide system benefits. This substitution requires mechanical redesign due to increased height (5.433" vs. 2.008") and adhesive mounting versus connector mount. The broader frequency range accommodates ISM, LoRa, and SigFox applications.

Both substitutes are RoHS compliant and manufactured by TE Connectivity Linx, an established RF component supplier with active product lines.

Frequently Asked Questions (FAQ)

Q: Can ANT-916-CW-RH directly replace WIH-AT-FA without mechanical modification?

A: Yes. Both parts share identical height (2.008"), RP-SMA Male connector termination, and connector-mount interface. No mechanical redesign is required for direct substitution.

Q: What is the frequency compatibility between WIH-AT-FA (916MHz) and ANT-916-CW-RH (915MHz center, 900–935MHz range)?

A: The ANT-916-CW-RH frequency range (900–935MHz) encompasses the WIH-AT-FA operating point of 916MHz. The 1MHz center frequency offset is within typical ISM band tolerance and does not affect functional compatibility.

Q: Why does ANT-916-MHW-RPS-L have different mounting (adhesive vs. connector mount)?

A: ANT-916-MHW-RPS-L is a center-fed double whip configuration designed for adhesive surface mounting, whereas WIH-AT-FA uses connector-mount topology. This architectural difference requires mechanical integration assessment and is not suitable for direct connector-based replacement.

Q: What is the significance of the height difference between WIH-AT-FA (51.00mm) and ANT-916-MHW-RPS-L (138.00mm)?

A: The ANT-916-MHW-RPS-L is a center-fed double antenna with 2.7× greater height, resulting in higher gain (5.4dBi). This configuration is applicable only to applications with sufficient physical clearance and where increased directivity is beneficial.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both ANT-916-CW-RH and ANT-916-MHW-RPS-L are RoHS compliant, providing regulatory advantage over the obsolete WIH-AT-FA (RoHS non-compliant).

Q: What is the cable length difference between WIH-AT-FA and the substitutes?

A: WIH-AT-FA includes a 610mm cable. ANT-916-CW-RH does not specify cable length in provided data. ANT-916-MHW-RPS-L includes a 4.6m cable assembly. Cable length requirements must be evaluated for specific application integration.

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