Wilkerson Instrument 4008 Data sheet

DESCRIPTION

Vertical omnidirectional antennas
radiate in a pattern similar to a
horizontal doughnut. Their gain is less
than that of a yagi antenna which
concentrates radiation in a single
direction. This reduced gain limits the
effective range of the omnidirectional
antenna, but proves effective when
directivity is not desired.

Omnidirectional antennas are useful in
short range applications where their

4008

2.1 dBi GAIN
915MHz BAND 1/2 WAVE DIPOLE ANTENNA

FEATURES

· Indoor Mounting

· Mount Directly on Product or on Electrical Housing
With Optional Cable

· Lightweight

· Range to 3000ft

use eliminates the need for antenna
alignment. Omnidirectional antennas
are also useful on the control end of a
polling system.

When an omnidirectional antenna is
used on the control end of a polling
system, a yagi can be used on each
slave unit for maximum gain and
reduction in possible interference due
to the front to back ratio gain reduction
of the yagi antenna.

The 4008 antenna swivels 90° at the
base to allow the antenna to remain
vertical with the base mounted either
vertically or horizontally .

Designed for indoor mounting, this 7"
whip offers flexibility in mounting and
dependable performance for short
range systems.

SPECIFICATIONS

ELECTRICAL

GAIN

2.1dBi

FREQUENCY

900-928MHz

VSWR

<2:1

IMPEDANCE

50 ohms

CONNECTOR

Reverse Polarity SMA Male
Brass With Nickle and Gold
Plating

MECHANICAL

RADIA TOR

Spring SS Wire

WHIP

Polyurethene (Black)

SWIVEL MECHANISM

Polycarbonate (Black)

DIAMETER

0.5"

LENGTH

7"

WEIGHT

0.7 Ounces.

MOUNTING

Direct Connect to Product
or Remote Mount With Optional
Extension Cable

VERTICAL PATTERN

ANTENNAS

27

DESCRIPTION

4152

17 dBi GAIN
915MHz BAND DUAL STACKED
10 ELEMENT HEAVY DUTY YAGI

FEATURES

· High Performance

· Rugged

· Weatherproof

· Lightweight

· Durable

This kit includes two (2) 4025 heavy
duty yagi antennas that are
termninated with Type N male
connectors that mate with a supplied
4074 two-port coupler. The coupler
adds the output of the two antennas
and provides approximately 2X the
signal of one antenna (3dB).

A yagi antenna can be operated with
the elements mounted vertically or
horizontally , but the most common use

SPECIFICATIONS

ELECTRICAL

GAIN

17dBi
Front to Back Ratio
20dB

FREQUENCY

896-960MHz

IMPEDANCE

50 ohms

VSWR

60MHz

<1.5:1

POWER RA TING

300 watts

CONNECTOR

Type N Female On 2
Port Coupler

for industrial wireless is vertical. The
transmitting and receiving antenna
must both have the same element
polarization for satisfactory operation.
A large loss in signal is experienced
when the elements are crossed
polarized.

When a vertical omnidirectional
antenna is used on the control end of
a polling system, a yagi can be used
on each slave unit for maximum gain

MECHANICAL

MA TERIAL

1" aluminum U channel boom
3/8" solid elements

FINISH

UV inhibited polyester coat

LENGTH

48"

WEIGHT

8 lbs.

MOUNT

Stainless Hardware for
23/8" mast

FLA T PLA TE AREA

WIND RA TING

WIND LOAD

2

.998 ft

125 MPH

67.4 lbs.

front to back ratio gain reduction.
These heavy duty yagi antennas are

constructed of 1" aluminum U channel
with 3/8" solid elements. All exposed
areas are coated with UV polyester.
The balun assembly is filled and sealed
with elastomeric thermoplastic.

The output of the 4074 two-port coupler
is a T ype N Female connector .

HORIZONTAL PATTERN

VERTICAL PATTERN

ANTENNAS

45

DESCRIPTION

4025

14 dBi GAIN
915MHz BAND 10 ELEMENT HEAVY DUTY YAGI

FEATURES

· Rugged and Weatherproof

· Lightweight Aluminum

· SS Mounting Hardware Included

· Wind Survival to 125 MPH

Y agi antennas achieve more gain than
vertical antennas by concentrating
radiation in a single direction. Their
reduced gain from the back end helps
keep other signals from interfering with
normal operation. The front to back
ratio is an important characteristic of
a yagi antenna.

A yagi antenna can be operated with
the elements mounted vertically or
horizontally , but the most common use

SPECIFICATIONS

ELECTRICAL

GAIN

14dBi
Front to Back Ratio
20dB

FREQUENCY

900-930MHz

IMPEDANCE

50 ohms

VSWR

<2:1

VERT BEAMWIDTH

45°

HORIZ BEAM WIDTH

50°

POWER RA TING

300 watts

CONNECTOR

Type N Female on 12" T eflon

Pigtail

for industrial wireless is vertical. The
transmitting and receiving antenna
must both have the same element
polarization for satisfactory operation.
A large loss in signal is experienced
when the elements are crossed
polarized.

When a vertical omnidirectional
antenna is used on the control end of
a polling system, a yagi can be used
on each slave unit for maximum gain

MECHANICAL

MA TERIAL

1" aluminum U channel boom
3/8" solid elements

FINISH

UV inhibited polyester coat

LENGTH

48"

WEIGHT

<4 lbs.

MOUNT

Stainless Hardware for
23/8" mast

FLA T PLA TE AREA

WIND RA TING

WIND LOAD

2

.265 ft

125 MPH

15.9 lbs.

and reduction in interference due to the
front to back ratio gain reduction.

These heavy duty yagi antennas are
constructed of 1" aluminum U channel
with 3/8" solid elements. All exposed
areas are coated with UV polyester.
The balun assembly is filled and sealed
with elastomeric thermoplastic.

The connector is a T ype N Female on
a 12" teflon pigtail cable.

HORIZONTAL PATTERN

VERTICAL PATTERN

ANTENNAS

43