AW-SPR0433-1 428-438 MHz Internal Spring / Copper-Tube Antenna (1 dBi)
428-438 MHz internal spring / copper-tube antenna — 1 dBi gain, linear polarization, Solder pad connector.
AW-SPR0433-1 — 428-438 MHz, internal spring / copper-tube antenna
AW-SPR0433-1 specifications
Model
AW-SPR0433-1
Frequency Range
428–438 MHz
Gain
1 dBi
Polarization
Linear
Half-Power Beamwidth
360° (H) × 75° (V)
Dimensions
38 × 6 × 6 mm
Connector
Solder pad
Impedance
50 Ω
VSWR
≤ 2.0:1
Power Handling
2 W
Material / Radome
Nickel-plated steel helix
The AW-SPR0433-1 is a 428-438 MHz internal spring / copper-tube antenna engineered for iot / m2m. It delivers 1 dBi of gain with linear polarization, making it a dependable choice where consistent 428-438 MHz performance is required.
Radiation Pattern and Gain
As an omnidirectional radiator, it provides a full 360 degree azimuth pattern with an approximate 75 degree elevation beamwidth, distributing energy evenly around the mast. The rated gain of 1 dBi is referenced to an isotropic radiator.
Mechanical and Electrical Specifications
Mechanically, the AW-SPR0433-1 measures 38 x 6 x 6 mm and is housed in a Nickel-plated steel helix. The standard interface is a Solder pad connector, with a nominal impedance of 50 ohms and a typical VSWR of 2.0:1 or better. The element withstands up to 2 W of input power.
Installation Guidance
The recommended installation is embedded / internal. For best results, mount the antenna with clear line of sight to the served area and bond all outdoor hardware to a proper grounding system.
Typical Applications
IoT / M2M
Smart Metering / AMI
Embedded Module
Request a Quote
Need this antenna with a custom connector, cable length, or radome color? Use the antenna configurator to confirm the specification and submit an inquiry for AW-SPR0433-1.
Advanced filters (dimension limits)
Frequently Asked Questions
What is a internal spring / copper-tube antenna used for?
Helical spring and drawn copper-tube radiators soldered or clipped inside a product housing where no external whip is acceptable.
Is AW-SPR0433-1 suitable for iot / m2m?
Yes. AW-SPR0433-1 is well matched to iot / m2m deployments, where its radiation pattern and gain provide reliable coverage and link margin.
Can the connector on AW-SPR0433-1 be changed?
Yes. The default RF interface can be supplied as SMA, N-type, TNC, or other connectors on request, and custom cable assemblies are available. Specify your interface in the inquiry form.
What is the standard impedance and VSWR of AW-SPR0433-1?
The nominal impedance is 50 ohms with a typical VSWR of 1.5:1 or better across the operating band. A 75 ohm option can be quoted for broadcast applications.
How do I request a quote for AW-SPR0433-1?
Use the antenna configurator on this page to confirm the specification, then submit the inquiry form. An engineer from astronwireless.com will respond within one business day.
Accessories & Components
Complete your installation with matched RF cables, connectors, mounts, adapters and bulk coaxial cable. Custom assemblies, lengths and interfaces are available on request.
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