COM-power corporation AH-640 User manual
Page 1 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
INSTRUCTION MANUAL
Horn Antenna
AH-640
26.5 to 40 GHz
Page 2 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
Table of Contents
1.0 Introduction ..............................................................................................................
2.0 Product Description ...................................................................................................... 4
Overview .................................................................................................................................... 4
Standard Items included with the antenna: ............................................................................ 4
. 0 Product Specifications .............................................................................................. 5
3.1 Other Horn Antennas available from Com-Power ..................................................... 5
3.2 Other instrumentation accessories available ............................................................. 5
4. 0 Important Safety Precautions .................................................................................. 6
5.0 Warranty ................................................................................................................... 7
5.1 Maintenance .................................................................................................................. 7
6.0 Setting up and using the antenna ............................................................................... 8
7.0 Theory of Operation .................................................................................................. 9
7.1 Overview ....................................................................................................................... 9
8.0 Typical Antenna Data ............................................................................................... 10
Figure 8.1 – Typical Antenna Factors.................................................................................................... 1
Table 8.1 – Typical Power Requirement in Watts at 1 meter antenna spacing ................................... 1
Page 3 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
1. Introduction
This manual includes the antenna specifications, safety precautions, maintenance and
warranty information. It also includes some basic guidance on properly on how to use it for
EMC testing.
Information contained in this manual is the property of Com-Power Corporation. It is issued
with the understanding that none of the material may be reproduced or copied without
permission from Com-Power.
Page 4 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
2. Product Description
Overview
The model A -640 orn antenna was specifically designed for EMI measurement from 26.5
to 18 G z. The antenna is capable of receiving and transmitting signals for EMC testing. The
orn antenna is a transducer which converts electric field strength that can be displayed on a
spectrum analyzer or EMI receiver during EMI testing.
Setting up using the antenna is described in section 6. Information on theory of operation is
given in section7.
Standard Items included with the antenna:
o
User's guide.
o
Calibration data and Certificate traceable to NIST.
Optional item
o
ISO-17025 calibration data and certificate.
Page 5 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
3. Product Specifications
Model: A -640
Frequency Range: 26.5 to 40 G z
Typical VSWR: < 2: 1
Power Handling: 5 Watts CW
Output Impedance: 50 Ω
Polarization: Linear
Gain: 23 dBi min
Antenna Factors: 35 to 37 dB/m
Connector: 2.9 mm (f) - (k type)
Dimensions (L x W x H): 8.7 x 5.7 x 9 inches
22 x 14.5 x 22.8 cm
Weight: 1.5 lb. / 0.68 kg
3.1 Other Horn Antennas available from Com-Power
•A -220 - 200 M z to 2 G z
•A -8065 - 800 M z to 5 G z
•A -118 - 1 to 18 G z
•A -826 - 18 to 26.5 G z
•A -840 - 18 to 40 G z
3.2 Other instrumentation accessories available
•PAM-2000 Preamplifier – 10 M z to 2 G z, 27 dB Gain
•PAM-6000 Preamplifier – 1 to 6 G z, 30 dB Gain
•PAM-118A Preamplifier – 1-18 G z, 40 dB Gain
•PAM-840 Preamplifier – 18 to 40 G z, 25 dB Gain
•AT-120 Antenna Tripod
•Microwave cable assemblies
.
Page 6 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
4. 0 Important Safety Precautions
Generating Electro Magnetic Fields
The Model A -640 antenna can used to generate electro- magnetic fields for immunity
testing. Immunity testing should be conducted inside a shielded enclosure or anchoic
chamber to avoid interference to other equipment and exposure of personnel to high
electromagnetic fields.
Maintenance
There are no user serviceable parts in the antenna. User modifications to the antenna will
void warranty and may also invalidate the calibration. Send the antenna to an authorized
Com-Power service center if needs repair. Please visit our website at www.com-power.com
to request a return merchandise authorization number (RMA) before you send the unit in for
service.
Environmental conditions
This antenna is designed for indoor or outdoor use.
Page 7 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
19121 El Toro Road Lake Forest, CA 92676 ● (949) 459-96 ● fax (949) 459-96 4 ● com-power.com
REV111213
5.0 Warranty
Com-Power warrants to its Customers that the antennas it manufactures will be free from
defects in materials and workmanship for a period of years. This warranty shall not apply to:
•
Transport damages during shipment from your plant.
•
Damages due to poor packaging.
•
Products operated outside their specifications.
•
Products Improperly maintained or modified.
•
Consumable items such as fuses, power cords, cables, etc.
•
Normal wear
•
Calibration
•
Products shipped outside the United States without the prior knowlege of Com-
Power.
In addition, Com-Power shall not be obliged to provide service under this warranty to repair
damage resulting from attempts to install, repair, service or modify the antenna by personnel
other than Com-Power service representatives.
Under no circumstances does Com-Power recognize or assume liability for any loss, damage
or expense arising, either directly or indirectly, from the use or handling of this product, or
any inability to use this product seperately or in combination with any other equipment.
When requesting warranty services, it is recommended that the original packaging material
be used for shipping. Damage due to improper packaging will void warranty.
In the case of repair or complaint, a label should be attached to the housing of the
instrument which describes briefly the faults observed. Please include the name, telephone
number and email address of the contact person. Please visit our website www.com-
power.com and obtain an RMA number by selecting service and completing the online form.
5.1 Maintenance
This antenna has no user serviceable parts inside. If the unit does not operate or needs
calibration, please contact Com-Power Corporation. Any modifications or repairs performed
on the antenna by someone other than an authorized factory trained technician will void
warranty.
The exterior surface may be cleaned with mild detergent and then be wiped with a dry, clean,
lint-free cloth.
Page 8 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
19121 El Toro Road Lake Forest, CA 92676 ● (949) 459-96 ● fax (949) 459-96 4 ● com-power.com
REV111213
6. Setting up and using the antenna
6.1 Connecting
The model A -640 horn antenna has a type 2.9 mm female connector of signal output or
input. It can handle up to 5 Watts CW signal. These connectors are delicate and should be
handled with care. Do not over tighten or use excessive force when making connections.
6.2 Antenna setup for receiving signals
The model A -640 must be connected to the receiver / spectrum analyzer with high
frequency, low loss cables. The loss must be measured and used in calculating the field
strength.
6.3 Antenna setup for trans itting signals
When the A -640 antenna is used for transmitting signals, the antenna is connected to a
microwave signal generator and a power amplifier. The model A -640 antenna can transmit
up to 5 Watts of continuous power. The field generated by the antenna can be measured by
using a field strength meter / probe or another horn antenna.
6.4 Test location
The orn Antenna must be mounted and placed in area away from other conductive objects
or materials when in use. Large conductive building, structures and electrical cables, can
reflect and reradiate the emissions of EUT, causing errors in the test data. In addition, care
should be taken to keep measuring instruments and test personnel away from the test area
to avoid interference to the test, as well exposure of test personnel to high electro-magnetic
fields.
Page 9 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
19121 El Toro Road Lake Forest, CA 92676 ● (949) 459-96 ● fax (949) 459-96 4 ● com-power.com
REV111213
7. Theory of Operation
7.1 Overview
Broadband antennas allow measurement of signals over a wide frequency range. Model A -
640 orn Antennas are broadband antennas that operate in the frequency range of 18 to
26.5 G z.
Model A -640 can both receive and Transmit over the frequency range of operation and is
used for susceptibility and emissions testing in EMC Laboratories.
Before the orn antennas are used for measurement they have to be calibrated. During
calibration of a known field strength (dBµV/m) is generated around the antenna at each
frequency at predetermined intervals between 18 G z – 26.5 G z. The difference between
field strength (dBµV/m) received by the antenna and known field strength generated
(dBµV/m) is the antenna factor (dB/m) for that frequency. During EMC testing the antenna
factor for the frequency of interest is added back to reading on the EMI meter or spectrum
analyzer to calculate the field strength measured by the antenna.
Field strength (dBµV/m) = Output measured (dBµV) + Antenna Factor (dB/m)
When using the AH-64 antenna for transmitting application, please refer to Table 8.1 to
determine the power requirements to generate the desired electro-magnetic field.
Page 1 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
19121 El Toro Road Lake Forest, CA 92676 ● (949) 459-96 ● fax (949) 459-96 4 ● com-power.com
REV111213
8. Typical Antenna Data
Figure 8.1 – Typical Antenna Factors
Frequency
Gain
(dBi)
1
V/m
2
V/m
1
V/m
26.5 23.67 0.01 0.06 1.43
27 24.24 0.01 0.05 1.26
28 23.25 0.02 0.06 1.58
29 23.26 0.01 0.05 1.57
30 23.95 0.01 0.05 1.34
32 24.11 0.01 0.05 1.29
34 24.44 0.01 0.05 1.20
36 25.64 0.01 0.04 0.91
38 24.1 0.01 0.05 1.33
40 25.55 0.01 0.04 0.93
Table 8.1 – Typical Power Requirement in Watts at 1 meter antenna spacing
20
25
30
35
40
45
50
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Frequency (dB/ )
Frequency (GHz)
Page 11 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
19121 El Toro Road Lake Forest, CA 92676 ● (949) 459-96 ● fax (949) 459-96 4 ● com-power.com
REV111213
Typical Antenna Radiation Patterns
E-Plane H-Plane
Figures 8.2
-60
-50
-40
-30
-20
-10
0
0°
15°
30°
45°
60°
75°
90°
105°
120°
135°
150°
165°
180°
-165°
-150°
-135°
-120°
-105°
-90°
-75°
-60°
-45°
-30°
-15°
26.5 GHz
Page 12 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
19121 El Toro Road Lake Forest, CA 92676 ● (949) 459-96 ● fax (949) 459-96 4 ● com-power.com
REV111213
Figure 8.3 – Typical Antenna Patterns 27 GHz
E-Plane H-Plane
Radiation Pattern
3 dB Bea width
E-Plane: 9.5ᶛ H-Plane: 13.3ᶛ
Figure 8.4 – Typical Antenna Patterns at 28 GHz
E-Plane H-Plane
Radiation Pattern
-6
-5
-4
-3
-2
-1
0
° 1 ° 2 °
3 °
4 °
5 °
6 °
7 °
8 °
9 °
1
11 °
12 °
13 °
14 °
15 °
16 °
17 °
18 °
-17 °
-16 °
-15 °
-14 °
-13 °
-12 °
-11 °
-1 °
-9 °
-8 °
-7 °
-6 °
-5 °
-4 °
-3 °
-2 ° -1 °
Page 13 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
19121 El Toro Road Lake Forest, CA 92676 ● (949) 459-96 ● fax (949) 459-96 4 ● com-power.com
REV111213
3 dB Bea width
E-Plane: 12.5ᶛ H-Plane: 13.5ᶛ
Figure 8.5 – Typical Antenna Patterns at 29 GHz
E-Plane H-Plane
Radiation Pattern
-60
-50
-40
-30
-20
-10
0
°
15°
3 °
45°
6 °
75°
9 °
1 5°
12 °
135°
15 °
165°
18 °
-165°
-15 °
-135°
-12 °
-1 5°
-9 °
-75°
-6 °
-45°
-3 °
-15°
-6
-5
-4
-3
-2
-1
0
° 1 ° 2 °
3 °
4 °
5 °
6 °
7 °
8 °
9 °
1
11 °
12 °
13 °
14 °
15 °
16 °
17 °
18 °
-17 °
-16 °
-15 °
-14 °
-13 °
-12 °
-11 °
-1 °
-9 °
-8 °
-7 °
-6 °
-5 °
-4 °
-3 °
-2 ° -1 °
Page 14 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
19121 El Toro Road Lake Forest, CA 92676 ● (949) 459-96 ● fax (949) 459-96 4 ● com-power.com
REV111213
3 dB Bea width
E-Plane: 13.0ᶛ H-Plane: 11.3ᶛ
-60
-50
-40
-30
-20
-10
0
°
15°
3 °
45°
6 °
75°
9 °
1 5°
12 °
135°
15 °
165°
18 °
-165°
-15 °
-135°
-12 °
-1 5°
-9 °
-75°
-6 °
-45°
-3 °
-15°
-6
-5
-4
-3
-2
-1
0
°
1 ° 2 °
3 °
4 °
5 °
6 °
7 °
8 °
9 °
1
11 °
12 °
13 °
14 °
15 °
16 °
17 °
18 °
-17 °
-16 °
-15 °
-14 °
-13 °
-12 °
-11 °
-1 °
-9 °
-8 °
-7 °
-6 °
-5 °
-4 °
-3 °
-2 ° -1 °
Page 15 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
19121 El Toro Road Lake Forest, CA 92676 ● (949) 459-96 ● fax (949) 459-96 4 ● com-power.com
REV111213
Figure 8.6 – Typical Antenna Patterns 30 GHz
E-Plane H-Plane
Radiation Pattern
3 dB Bea width
E-Plane: 8.0ᶛ H-Plane: 11.5ᶛ
-60
-50
-40
-30
-20
-10
0
°
15°
3 °
45°
6 °
75°
9 °
1 5°
12 °
135°
15 °
165°
18 °
-165°
-15 °
-135°
-12 °
-1 5°
-9 °
-75°
-6 °
-45°
-3 °
-15°
-6
-5
-4
-3
-2
-1
0
° 1 ° 2 °
3 °
4 °
5 °
6 °
7 °
8 °
9 °
1
11 °
12 °
13 °
14 °
15 °
16 °
17 °
18 °
-17 °
-16 °
-15 °
-14 °
-13 °
-12 °
-11 °
-1 °
-9 °
-8 °
-7 °
-6 °
-5 °
-4 °
-3 °
-2 ° -1 °
Page 16 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
19121 El Toro Road Lake Forest, CA 92676 ● (949) 459-96 ● fax (949) 459-96 4 ● com-power.com
REV111213
Figure 8.7 – Typical Antenna Patterns at 31 GHz
E-Plane H-Plane
Radiation Pattern
3 dB Bea width
E-Plane: 10.3ᶛ H-Plane: 11.0ᶛ
-60
-50
-40
-30
-20
-10
0
°
15°
3 °
45°
6 °
75°
9 °
1 5°
12 °
135°
15 °
165°
18 °
-165°
-15 °
-135°
-12 °
-1 5°
-9 °
-75°
-6 °
-45°
-3 °
-15°
-6
-5
-4
-3
-2
-1
0
°
1 ° 2 °
3 °
4 °
5 °
6 °
7 °
8 °
9 °
1
11 °
12 °
13 °
14 °
15 °
16 °
17 °
18 °
-17 °
-16 °
-15 °
-14 °
-13 °
-12 °
-11 °
-1 °
-9 °
-8 °
-7 °
-6 °
-5 °
-4 °
-3 °
-2 ° -1 °
Page 17 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
19121 El Toro Road Lake Forest, CA 92676 ● (949) 459-96 ● fax (949) 459-96 4 ● com-power.com
REV111213
Figure 8.8 – Typical Antenna Patterns at 32 GHz
E-Plane H-Plane
Radiation Pattern
3 dB Bea width
E-Plane: 10.0ᶛ H-Plane: 11.5ᶛ
-60
-50
-40
-30
-20
-10
0
°
15°
3 °
45°
6 °
75°
9 °
1 5°
12 °
135°
15 °
165°
18 °
-165°
-15 °
-135°
-12 °
-1 5°
-9 °
-75°
-6 °
-45°
-3 °
-15°
-6
-5
-4
-3
-2
-1
0
° 1 ° 2 °
3 °
4 °
5 °
6 °
7 °
8 °
9 °
1
11 °
12 °
13 °
14 °
15 °
16 °
17 °
18 °
-17 °
-16 °
-15 °
-14 °
-13 °
-12 °
-11 °
-1 °
-9 °
-8 °
-7 °
-6 °
-5 °
-4 °
-3 °
-2 ° -1 °
Page 18 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
19121 El Toro Road Lake Forest, CA 92676 ● (949) 459-96 ● fax (949) 459-96 4 ● com-power.com
REV111213
Figure 8.9 – Typical Antenna Patterns at 33 GHz
E-Plane H-Plane
Radiation Pattern
3 dB Bea width
E-Plane: 9.3ᶛ H-Plane: 11.5ᶛ
-60
-50
-40
-30
-20
-10
0
°
15°
3 °
45°
6 °
75°
9 °
1 5°
12 °
135°
15 °
165°
18 °
-165°
-15 °
-135°
-12 °
-1 5°
-9 °
-75°
-6 °
-45°
-3 °
-15°
-6
-5
-4
-3
-2
-1
0
° 1 ° 2 °
3 °
4 °
5 °
6 °
7 °
8 °
9 °
1
11 °
12 °
13 °
14 °
15 °
16 °
17 °
18 °
-17 °
-16 °
-15 °
-14 °
-13 °
-12 °
-11 °
-1 °
-9 °
-8 °
-7 °
-6 °
-5 °
-4 °
-3 °
-2 ° -1 °
Page 19 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
19121 El Toro Road Lake Forest, CA 92676 ● (949) 459-96 ● fax (949) 459-96 4 ● com-power.com
REV111213
Figure 8.10 – Typical Antenna Patterns at 34 GHz
E-Plane H-Plane
Radiation Pattern
3 dB Bea width
E-Plane: 10.0ᶛ H-Plane: 11.3ᶛ
-60
-50
-40
-30
-20
-10
0
°
15°
3 °
45°
6 °
75°
9 °
1 5°
12 °
135°
15 °
165°
18 °
-165°
-15 °
-135°
-12 °
-1 5°
-9 °
-75°
-6 °
-45°
-3 °
-15°
-6
-5
-4
-3
-2
-1
0
° 1 ° 2 °
3 °
4 °
5 °
6 °
7 °
8 °
9 °
1
11 °
12 °
13 °
14 °
15 °
16 °
17 °
18 °
-17 °
-16 °
-15 °
-14 °
-13 °
-12 °
-11 °
-1 °
-9 °
-8 °
-7 °
-6 °
-5 °
-4 °
-3 °
-2 ° -1 °
Page 2 of 25
INSTRUCTION MANUAL
Horn Antenna (AH-640)
19121 El Toro Road Lake Forest, CA 92676 ● (949) 459-96 ● fax (949) 459-96 4 ● com-power.com
REV111213
Figure 8.11 – Typical Antenna Patterns at 35 GHz
E-Plane H-Plane
Radiation Pattern
3 dB Bea width
E-Plane: 9.8ᶛ H-Plane: 10.8ᶛ
-60
-50
-40
-30
-20
-10
0
°
15°
3 °
45°
6 °
75°
9 °
1 5°
12 °
135°
15 °
165°
18 °
-165°
-15 °
-135°
-12 °
-1 5°
-9 °
-75°
-6 °
-45°
-3 °
-15°
-6
-5
-4
-3
-2
-1
0
° 1 ° 2 °
3 °
4 °
5 °
6 °
7 °
8 °
9 °
1
11 °
12 °
13 °
14 °
15 °
16 °
17 °
18 °
-17 °
-16 °
-15 °
-14 °
-13 °
-12 °
-11 °
-1 °
-9 °
-8 °
-7 °
-6 °
-5 °
-4 °
-3 °
-2 ° -1 °
Table of contents
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