Embedded and Low-Gain Communication Antennas

Discover AOE’s tri-band bar antennas, omnidirectional and low-gain antennas, and embedded antennas – all designed using the latest radio technology and with our clients’ needs in mind

Embedded and Low-Gain Communication Antenna Development

At Alpha Omega Electromagnetics, we have the expertise required to develop and deliver high performance embedded and low-gain antenna architectures for mobile, covert, and other applications requiring electrically small antennas for communication applications. AOE use its vast expertise in electromagnetic and mechanical modeling to integrate these antennas into their target packages and ensure that they operate optimally in their intended environment.

ORBCOMM Tri-Band Bar Antenna

ORBCOMM Tri-Band Bar Antenna

  • Designed for use on mobile platforms utilizing the ORBCOMM satellite network
  • Three antenna elements integrated into one package
    • ORBCOMM VHF antenna element
    • Active GPS element
    • Passive Cellular GSM/GPRD antenna that covers the 800/1700/1900/2100 MHz frequency band

ORBCOMM Tri-Band Bar Antenna Parameters – VHF Antenna Element

ParameterRequirement
Transmit frequency148.0000 – 150.0100 MHz
Receive frequency137.0000 – 138.0000 MHz
Operating ModeHalf Duplex
Transmit power10 W
VSWR transmit1.5:1
VSWR receive2.0:1
Impedance50 W
Minimum gain-7 dBi
Elevation patternOptimize between 5° and 45°
Azimuth pattern360°
SizeMust fit within an enclosure that is 4” wide by 3” tall by 16” long, excluding mounting bosses
PolarizationRHCP desired
Cabling5m RG-58 cable with TNC/M connector
Temperature-40°C to +85°C
Shock and VibrationPer SAE J1455 for Chassis Mounted Equipment
Radome load bearing150 pound vertical load
Radome colorBlack

ORBCOMM Tri-Band Bar Antenna Parameters – GPS Antenna Element

ParameterRequirement
Frequency1575.42 ± 1.023 MHz
ConfigurationActive antenna
Gain-5 dBiC minimum at zenith
Axial ratio4.0 dB maximum at zenith
PolarizationRHCP
SizeMust fit within ORBCOMM antenna package
Cabling5m RG-174 cable with SMA/M connector
Temperature-40°C to +85°C
Shock and VibrationPer SAE J1455 for Chassis Mounted Equipment
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Compact, Low-Cost L-Band Antenna for Use with Inmarsat System

Table 1. Internal Printed Circuit Board Mounted L-Band Antenna design requirements

 

Parameter

Requirement

Receive frequency

Extended band: 1518 – 1525 MHz

Normal band: 1525 – 1559 MHz

GPS frequency

1575.52 MHz

Transmit frequency

Normal band: 1626.5 – 1660.5 MHz

Extended band: 1668 – 1675 MHz

Polarization

RHCP

Axial Ratio (at zenith)

< 6 dB @ 1518 – 1559 MHz

< 3 dB @ 1575.42 MHz

< 5 dB @ 1626.5 – 1660.5 MHz

< 6 dB @ 1668 – 1675 MHz 

Gain (at zenith)

+1 dBic min @ 1518 – 1525 MHz

+2 dBic min @ 1525 – 1559 MHz

+2 dBic min@ 1575.42 MHz

+3 dBic min @ 1626.5 – 1660.5 MHz

+2 dBic min @ 1668 – 1675 MHz

Nominal Impedance

50 Ω

VSWR

< 2.5:1 @ 1518 – 1559 MHz

< 2.5:1 @ 1575.42 MHz

< 1.8:1 @ 1626.5 – 1675 MHz

Transmit Power

2 W CW @ 1626.5 – 1660.5 MHz

2 W CW @ 1668 – 1675 MHz

Size

Must less than or equal to 3” long by 3” wide by 0.25” tall

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UHF SATCOM Low-Gain / Omnidirectional Antennas

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Spiral Antennas

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Broadband UHF Dipole Antenna

Broadband UHF Dipole Antenna Predicted and Measured Input Return Loss

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Broadband Notch Radiator Antennas – Individual Elements

Multiband Communications Module with Enclosure

Embedded Antennas

Embedded Antennas

30 – 80 MHz Tunable Loop Antenna

80 – 190 MHz Tunable Loop Antenna

80 – 190 MHz Tunable Loop Antenna

190 – 500 MHz Tunable Loop Antenna

500 – 1000 MHz Tunable Loop Antenna

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Phase Shifters