Antenna Types; Whip Antennas; Collinear Array Antennas - ProSoft Technology RLX2-IHW-E User Manual

RLX2-IHx Series ♦ 802.11a, b, g, n
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13.2 Antenna Types

Antenna types used with a RLX2-IHx series radio include whip, collinear array, yagi
array, and parabolic reflector. See the RLX2-IHx series Approved Antennas (page 224)
section for other types of approved antennas.

13.2.1 Whip Antennas

For RLX2-IHx series radios, use a 1/2 wave straight whip antennal or a 1/2 wave
articulating whip (2 dBi) antenna. These antennas are the most common type in use
today.

They are approximately 5 inches long, and are likely to be connected directly to the
client radio enclosure.

These antennas do not require a ground plane.

Articulating antennas and non-articulating antennas work in the same way.

13.2.2 Collinear Array Antennas

A collinear array antenna is typically composed of several linear antennas stacked on
top of each other. The more stacked elements it has, the longer it is, and the more gain it
has. The signal is connected at one end.

The antenna pattern is torroidal. Its azimuthal beamwidth is 360° (omnidirectional).
Its vertical beamwidth depends on the number of elements/length, and more
elements produce a narrower beamwidth.

The antenna gain depends on the number of elements/length, and more elements
produce a higher gain. The typical gain for this antenna is 5 to 10 dBi.

The antenna polarity is linear, or parallel to the length of the antenna.
ProSoft Technology, Inc.
Appendix G - Antenna Configuration
User Manual
Page 222 of 248