Keysight N6850A User manual

User Guide
Keysight
N6850A
Broadband
Omnidirectional Antenna

2 N6850A Broadband Omnidirectional Antenna User Guide
Notices
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© Keysight Technologies 2016-2019
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laws.
Manual Part Number
N6850-90001
Edition
Edition 1.3, January 2019
Published by
Keysight Technologies, Inc.
1400 Fountaingrove Parkway
Santa Rosa, CA 95403
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procedure, practice, or the like that, if
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procedure, practice, or the like that, if
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notice until the indicated conditions are
fully understood and met.

3 N6850A Broadband Omnidirectional Antenna User Guide
Product
Description
An antenna that covers the entire frequency range of interest for
your spectrum monitoring or interference detection applications
is very important. Assembling discone antennas is time-
consuming and usually has to be done on-site as they are hard
to transport without damaging the elements and may require
multiple antennas to cover the full frequency range of the
receiver. Other antennas may not have uniform gain patterns
that are required by received signal strength geolocation
algorithms.
The Keysight N6850A Broadband Omni Antenna is a passive,
omnidirectional antenna designed for receivers that operates up
to 6 GHz. Mounting complexity is minimized with this one very
compact antenna. The low profile design makes it ideal for
inconspicuous spectrum monitoring applications. The antenna
provides uniform gain pattern for applications requireing time
difference of arrival or for received signal strength geolocation
techniques.
Industries that find the antenna most useful include spectrum
monitoring and signal location, outdoor and indoor and
interference detection and location. Its use may be fixed-site,
vehicle-mounted, or handheld operation. The antenna is for use
with Keysight N6841A RF Sensor, Keysight N99XX handheld
spectrum analyzers, Keysight spectrum analyzers, or any
commercial spectrum analyzer or receiver with 6 GHz operation.

4 N6850A Broadband Omni Antenna
Features and
Benefits
Specifications and
Characteristics
3D gain plot of a representative unit at
ambient temperature
All specs and plots are Typical unless otherwise stated.
Radial gain pattern at the horizon of a
representative unit at ambient temperature
Hardware
Frequency range
300 MHz to 6 GHz
Type
Omni-directional, Passive
Size
16.5 inch high x 6.14 inch wide
Connector
Type N
Polarization
Vertical
Impedance
50 ohms
VSWR
< 2.5 for 450 MHz to 6 GHz
Operating Temperature
-50 to +70°C
Ingress
IP67
Wind Survivability
100 miles/hr (160 km/hr)
ROHS
Compliant
Antenna weight
Approx. 1.15 kg
Mounting bracket weight
Approx 1.54 kg
Shipping weight
Approx 6.1 kg
Product features
Your benefits
Wide frequency range
Covers 300 MHz to 6 GHz, meaning
you only need only 1 antenna with
your RF sensor or other receiver
Uniform gain pattern
Suitable for indoor or outdoor
geolocation
Mounting adapter
Suitable for post or rail mounting, or
handheld use. Easily adapted for
vehicle mounting.
Compact design, low wind
loading
Suitable for signal monitoring from
tower or vehicle. Easy to transport,
easy to mount.

5 N6850A Broadband Omni Antenna
Average gain at the horizon at ambient temperature
Average gain over all space at ambient temperature
Average antenna factor over all space at ambient temperature
Note that signals below 350 MHz will require greater signal
strength for antenna reception.

6 N6850A Broadband Omni Antenna
Mounting There are 4 threaded inserts and 4 through-holes for mounting
the antenna. Use the enclosed mounting bracket or devise your
own mount.
The 4 threaded inserts will accept 1/4”-20 x 0.5” (inch) length
machine screws with ¼” washer. The through-holes will accept
1/4”-20 x 1” (inch) bolt and nut. When used with the provided
mounting bracket, it is possible to mount with either the 4
through-holes or the 4 threaded inserts.
Through-hole mounting (quantity 4, not included)
1/4”-20 x 1 inch (minimum length)
Threaded insert mounting (quantity 4, not included)
¼”-20 x 0.5 inch (max 5/8 inch).
The mounting bracket can be vertical pole or horizontal rail
mounted with 2 U-bolts (not included). All slots accommodate
U-bolts for 1” to 3” diameter pipe. Mount designed for 5/16”
diameter U-bolts.

7 N6850A Broadband Omni Antenna
Cable feed through
U-bolts for vertical pole mounting (U-bolts not included)
U-bolts for horizontal rail mounting (U-bolts not included)
¼-20 Tripod mount
Vehicle mounting can be done by purchasing a magnetic mount
with a 1/4-20 tripod screw.

8 N6850A Broadband Omni Antenna
Dimensions

9 N6850A Broadband Omni Antenna
Safety Symbols
The following general safety precautions must be observed during all
phases of operation of this instrument. Failure to comply with these
precautions or with specific warnings or operating instructions in the
product manuals violates safety standards of design, manufacture, and
intended use of the instrument. Keysight Technologies assumes no
liability for the customer's failure to comply with these requirements.
Product manuals are provided with your instrument on CD-ROM
and/or in printed form. Printed manuals are an option for many
products. Manuals may also be available on the Web. Go to
www.keysight.com and type in your product number in the Search
field at the top of the page.
General
This product is a passive, receive-only antenna. Do not remove
instrument shell –there are no user serviceable parts within.
Environment Conditions
This instrument is intended for indoor or outdoor use. Refer to the
specifications tables for ambient operating temperature range.
This symbol represents the time period during which no hazardous or toxic
substance elements are expected to leak or deteriorate during normal use.
Forty years is the expected useful life of this product.
Waste Electrical and Electronic Equipment (WEEE)
Directive 2002/96/EC
This product complies with the WEEE Directive (2002/96/EC) marking
requirement. The affixed product label (see below) indicates that you
must not discard this electrical/electronic product in domestic
household waste.
Product Category: With reference to the equipment types in the
WEEE directive Annex 1, this product is classified as a “Monitoring
and Control Instrumentation” product.
Do not dispose in domestic household waste.
To return unwanted products, contact your local Keysight office for
more information.
This symbol indicated compliance with the China RoHS regulation for
paper-/fiberboard packaging.

10 N6850A Broadband Omni Antenna
Ordering
Information
(Note: vehicle mount and mounting hardware not included)
Model
Description
N6850A
Broadband omni antenna (6 GHz)
Includes post/rail mounting adapter
N-type antenna cable (5 ft)
Mounting instructions
Return-to-Keysight Warranty: 1 year

This information is subject to change without
notice. © Keysight Technologies January 2016-2019
www.keysight.com