Alpha 405G 4G NB IoT and LoRa Adhesive T-bar Antenna

The Alpha 40 is a wideband adhesive mount dipole antenna designed for cellular and sub GHz IoT applications. It supports 5G NR, 4G LTE and NB IoT operation across a broad range of low and mid band frequencies, making it suitable for regional and global cellular networks
used by modern IoT devices.

The antenna also operates in the ISM 868 MHz and 915 MHz bands, providing compatibility with LoRa, Sigfox and other long range IoT systems. Its balanced dipole design is ground plane independent, and the flexible construction allows the antenna to conform to curved
or irregular surfaces. Adhesive mounting enables quick integration into compact enclosures, and the use of low loss cable helps maintain stable RF performance.

The Alpha 40 is well suited for metering, telematics, sensor devices and industrial platforms.

Key Features

  • Supports 5G NR / 4G LTE / 3G UMTS / 2G Quad-band GSM
  • Supports LTE Cat M, LTE Cat NB and NR Cat NB Bands
  • Supports LoRa / Zigfox / ISM 868 MHz / ISM 915 MHz
  • Balanced dipole design – ground plane independent
  • Flexible antenna construction suitable for fitting to large radius curved surfaces

Electrical Specifications

  • Impedance: 50 Ohm
  • Polarization: Vertical
  • Max Input Power: 1 W
  • Ground plane independent: Yes

Environmental Specifications

  • Operating Temperature range: -30 to +60
  • Storage Temperature range: -30 to +60

Mechanical Specifications

  • Dimensions: 154.25 x 29.25 x 4.2 mm
  • Weight: 59 g
  • Connector: SMA Male
  • Mounting method: Adhesive Pad
  • Housing materials: PVC


Product Features
2G
GSM
3G
UMTS
4G
LTE
5G
NR
A
Adhesive
AoA
Bluetooth
AoD
Bluetooth
BLE
Bluetooth
HNT
Helium
ISM
868
ISM
915
ISM
2450
LTE
CAT-M
LTE
NB-IoT
LoRa
Wireless
Omni
directional
SF
Sigfox
Smart
Farming-Filter
W
Weightless
WLAN
2400
ZB
Zigbee
z
wave

Cellular Band Support
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B13
B14
B18
B19
B20
B25
B26
B27
B28
B28A
B30
B33
B34
B35
B36
B37
B38
B39
B40
B44
B46
B47
B52
B65
B66
B67
B68
B69
B70
B103

5G NR Band Support
n1
n2
n3
n5
n7
n8
n13
n14
n18
n20
n25
n26
n28
n30
n34
n38
n39
n40
n46
n47
n65
n66
n67
n70
n80
n81
n82
n84
n86
n89
n91
n92
n93
n94
n95
n97
n98
n99
n101

Product Compliance
RoHS
Compliant
REACH
Compliant
TSCA
Assessed
CMRT
Aligned
Anti
Slavery

Spectral Frequency Diagram

The Spectral View Diagram visually describes the performance of the antenna from 400 MHz to 6000 MHz. Key frequencies are marked highlighting the technology used and the colour represents the performance at that frequency taking in to consideration the VSWR and radiated efficiency of the antenna.

Green is considered a suitable band, amber is adequate in good signal conditions and red is likely to be unsuitable.

Datasheets

Alpha 40 Datasheet

Additional Resources

Antenna Fact Sheet
Understanding Antenna Theory
Antenna 2D Radiation Plot Guide
Visual Guide to Radiation Plots
IP Rating Guide

Ordering Information

Siretta Part Number: ALPHA40/1.5M/SMAM/S/S29
Description: 5G/4G/Dual Band Wi-Fi and ISM Adhesive T-bar Antenna SMA Male 1.5m Cable

Request For Quote

Siretta Part Number: ALPHA40/2.5M/SMAM/S/S/29
Description: 5G/4G/Dual Band Wi-Fi and ISM Adhesive T-bar Antenna SMA Male 2.5m Cable

Request For Quote

Siretta Part Number: ALPHA40/5M/SMAM/S/S/29
Description: 5G/4G/Dual Band Wi-Fi and ISM Adhesive T-bar Antenna SMA Male 5m Cable

Request For Quote

Alternative cable lengths and connector types can be specified for small volume orders