Xertex Micro Sphere Antenna

MICROSPHERE™
Omnidirectional Antenna

See Specs
See Antenna Patterns

The surprisingly small size of the Xertex Microsphere omnidirectional antenna allows it to be hidden almost anywhere, providing an invisible solution for many applications. Ideal for integrating into almost any device, its small size and exceptionally low profile allow it to easily fit in a variety of locations. The omnidirectional pattern of this antenna is suited to a variety of uses, including hand-held devices, in-building systems or other applications where mobility is a factor. The field pattern is toroidal, providing omnidirectional coverage in any plane around the long axis of the antenna, and two lobes in any plane parallel to the long axis.

The dualband, single-port Microsphere contains an integrated diplexer which allows independent or simultaneous use of the two frequency bands.

With the Microsphere antenna, aesthetics are no longer a concern for in-building applications, as the antenna can be placed behind a switch plate, or attached directly to the ceiling.

Customized and scalable to meet your frequency and application requirements

450 Mhz 850 MHz 920 MHz

Element Type Microstrip Microstrip Microstrip

Frequency Range¹ 420-480 MHz 806-896 MHz 880-960 MHz

Gain 3 dBi 3 dBi 3 dBi

Polarization² Linear Linear Linear

Azimuth 3dB Beamwidth 240º 240º 240º

Elevation 3dB Beamwidth 80º 80º 80º

Impedance 50 ohms 50 ohms 50 ohms

Maximum Input Power 50 watts 50 watts 50 watts

VSWR (Min. Performance) 1.5:1 1.5:1 1.5:1

Connector⁵ SMA Female SMA Female SMA Female

Size 20.6x14.5x0.25cm 11.4x8.6x0.25cm 10.9x7.9x0.25cm

Coating Material Acrylic Acrylic Acrylic

Operating Temperature -40º to +70º C -40º to +70º C -40º to +70º C

Storage Temperature -40º to +70º C -40º to +70º C -40º to +70º C

Model Numbers³ 450OM3W-SM00 850OM3W-SM00 918OM3W-SM00

1800 MHz 1900 MHz 2400 MHz 850&1900MHz 920&1800MHz

Element Type Microstrip Microstrip Microstrip Microstrip Microstrip

Frequency Range¹ 1710-1880 MHz 1850-1990 MHz 2400-2500 MHz 806-896&1850-1990 880-960&1710-1880

Gain 3 dBi 3 dBi 3 dBi 3 dBi 3 dBi

Polarization² Linear Linear Linear Linear Linear⁴

Azimuth 3dB Beamwidth 240º 240º 240º 240º 240º

Elevation 3dB Beamwidth 80º 80º 80º 80º 80º

Impedance 50 ohms 50 ohms 50 ohms 50 ohms 50 ohms

Maximum Input Power 50 watts 50 watts 50 watts 50 watts 50 watts

VSWR (Min. Performance) 1.5:1 1.5:1 1.5:1 1.5:1 1.5:1

Connector⁵ SMA Female SMA Female SMA Female SMA Female SMA Female

Size 5.6x3.5x0.25cm 5.6x3.5x0.25cm 4.6x3x0.25cm 15.9x13.6x0.25 12.9x15.6x0.25

Coating Material Acrylic Acrylic Acrylic Acrylic Acrylic

Operating Temperature -40º to +70º C -40º to +70º C -40º to +70º C -40º to +70º C -40º to +70º C

Storage Temperature -40º to +70º C -40º to +70º C -40º to +70º C -40º to +70º C -40º to +70º C

Model Numbers³ 180OM3W-SM00 190OM3W-SM00 245OM3W-SM00 819OM3W-SM00 918OM3W-SM00

¹Other frequencies available.
²Polarization is along the long axis of the antenna.
³Please contact your Xertex representative for different connector options and their part numbers.
⁴Polarization of 918OM3W is along the short axis of the antenna.
⁵Other connectors available with pigtail version only.

Mechanical:
The Microsphere antenna consists of a flat panel antenna, a choice of mounting configurations, and either a connector directly mounted to the antenna or a cable pigtail termination.

Mounting:
The Microsphere may be mounted directly to a ceiling tile, with the cable passing through the tile. The Microsphere may also be mounted using hook and loop fasteners on the cable/connector side, or with customer hardware.

For in-vehicle applications, the Microsphere may be mounted under the dashboard or rear shelf using plastic ties, hook and loop fasteners, or plastic mounting clips.

Xertex will supply the Microsphere with mounting hardware to customer specifications, or as a "bare" sub-assembly with a pigtail cable for integration into OEM systems.

Environmental:
The Microsphere antenna is designed for indoor, in-vehicle, or imbedded applications.

Inherently shock and vibration resistant.

Typical Antenna Patterns

Azimuth Plane
(cut perpendicular to the antenna, parallel to the connector/cable exit, perpendicular to the polarization)

Elevation Plane
(cut perpendicular to the antenna, parallel to the connector/cable exit, parallel to the polarization axis)

Omni Plane
(cut in the plane of the antenna perpendicular to the connector/cable exit)

As shown in these typical antenna patterns, the MicroSphere antenna offers excellent omnidirectional reception.

© 1996-2000, Xertex Technologies, Inc. All rights reserved.
A Division of Centurion Wireless Technologies, Inc.