Orbit-fr Horizontal Scanners User Manual download pdf

NEAR-FIELD SCANNERS

www.orbitfr.com

ORBIT/FR planar scanners are available for

horizontal mounting. Horizontal mounting of

scanners is useful when the AUT is designed to

be supported from below, or cannot be mounted

to face a vertical scanner. The most common

example of this type of antenna is a space borne

type. Other examples include large reflectors

and some vehicle mounted antennas.

The AL-4951 and AL-4952 family of scanners,

up to 9 x 9 feet (2.7 meters square), may be

ordered by substituting an H for the V in the part

number. The AL-4953 and AL-4954 series may

be ordered in 1 meter increments in each axis

starting at 4 meters in length. The part

numbering is the same as the horizontal versions

with an H substituted for the V in the part

number.

The large horizontal scanners are constructed

from lightweight steel trusses. The X-axis is

supported on a frame with multiple precision

linear rails. The X-axis rides on linear bearings

below the support frame. Multiple pinions on a

common shaft drive the X-axis by engaging

racks along side the rails.

The Y-axis carriage travels along the X-axis

using a similar arrangement of 2 parallel linear

rails and bearings; a rack and pinion drive is also

used. The carriage is able to carry a Z-Roll

assembly and the probes. The large capacity

allows the use of a distributed network analyzer

on the probe carriage.

Horizontal scanners may be mounted in several

ways. Contact ORBIT/FR with information about

the facility in which the system is to be installed

for a detailed design proposal. Horizontal

scanners may be mounted to existing steel

beams or concrete pillars within a building. New

steel or concrete footings can be installed. Most

installations require a combination of these

techniques.

For applications that require special

configurations, scanners are available that place

a linear slide on the floor and a single axis

suspended from overhead. This combines

motion of the AUT and the probe to produce a

planar scan.

A variety of software correction techniques can

be employed to improve performance. These

techniques are based on optical and laser

calibration of the scanner actual position

measured with the optical system and compared

to the encoder reported position. For most

applications, the purchase of an expensive laser

system is not required.

Horizontal Scanners

1. High-speed option: Y-axis only for all models, 350 mm/sec (14 in/sec).

2. AL-4953 series X and Y = 3 to 12 meters in 1 meter increments, AL 4954

series X and Y = 13 to 25 meters in 1 meter increments.

Notes

AL-4951-H Series

AL-4952-H Series

AL-4953-H Series

AL-4954-H Series

Horizontal Scanners

1 2 3

Horizontal Scanners 1

Summary of Contents

Page 1 - Horizontal Scanners

18 NEAR-FIELD SCANNERS www.orbitfr.com ORBIT/FR planar scanners are available for horizontal mounting. Horizontal mounting of scanners is useful w

Page 2

19 NEAR-FIELD SCANNERS www.orbitfr.com AL- 4951-1-4-4-H AL- 4951-1-5.5-5.5-H AL- 4952-1-7-7-H AL- 4952-1-9-9-H AL- 4953-1-26.4-23.1-H AL- 4954-1

Page 3

20 NEAR-FIELD SCANNERS www.orbitfr.com Horizontal Scanners

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Orbit-fr Horizontal Scanners User Manual

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