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Description The ALC-100 is a broadband, linearly polarized Log Periodic Dipole Array (LPDA) Antenna, operating over the frequency range of 200 MHz to 1 GHz; and with excellent efficiency between 300 MHz and 1 GHz. This antenna is a compact version of the AL- 100, in that the overall length of the antenna has been reduced by over 13 inches, with only a slight compromise in overall performance. Construction The construction of the ALC-100 is identical to that of the AL-100 Log Periodic, in that it has been designed to be extremely durable, making it an ideal choice for daily use in laboratory environments, both indoors and outdoors, and even under continuous exposure to extreme weather conditions. The antenna elements are solid stainless steel, and the “feeder tubes” are constructed from the same heavy guage, corrosion resistant aluminum. Application The ALC-100 Compact Log Periodic Antenna is intended for use as an EMI test antenna for qualification-level regulatory compliance measurements (FCC, CE, RTCA DO-160, FDA, SAE Automotive, etc.). The ALC-100 can also be used in conjunction with an RF power amplifier (up to 50 watts) to generate RF fields associated with RF immunity tests. For high power applications, Com-Power’s ALP-100 Power Log Periodic Antenna is an excellent choice. In addition, a pair of ALC-100 Compact Log Periodic Antennas can be used in lieu of dipole antennas for Normalized Site Attenuation (NSA) calibrations of Open Area Test Sites (OATS) or Semi-Anechoic Chambers (SAC); thereby avoiding the time- consuming process of tuning the dipole element lengths at each discrete frequency. Notwithstanding the above applications, the ALC- 100 can also be used for site comparisons, shielding effectiveness tests of enclosures, field monitoring, site surveys and other general purposes. Mounting The mounting assembly for the the ALC-100 incorporates a hinge mechanism to quickly and easily change the antenna polarization. The assembly is equipped with a standard 1/4-inch x 20 mounting hole, which allows it to be affixed to Com-Power’s AT-812 Antenna Tripod, AM-400 Antenna Mast, or any other similar structure with compatible mounting arrangements. Features Frequency Range 300 MHz to 1 GHz (useable from 200 MHz) Transmit & Receive Capabilities emissions/immunity applications Individual Calibration Included per ANSI C63.5 with NIST traceability Three-year Standard Warranty Calibration Each antenna is individually calibrated per ANSI C63.5 with NIST traceability. The calibration data and certificate is provided. Recognized ISO 17025 accredited calibration is also available upon request. (W) 5.1" (H) 21.5" (D) 25.5" Com-Power Corporation 19121 El Toro Road, Silverado, California 92676 (949) 459-9600 www.com-power.com Rev. D10.18 Compact Log Periodic Antenna ALC-100
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Compact Log Periodic Antenna - Com-Power Corporation · Log Periodic Antenna is an excellent choice. In addition, a pair of ALC-100 Compact Log Periodic Antennas can be used in lieu

Nov 03, 2020

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Page 1: Compact Log Periodic Antenna - Com-Power Corporation · Log Periodic Antenna is an excellent choice. In addition, a pair of ALC-100 Compact Log Periodic Antennas can be used in lieu

DescriptionThe ALC-100 is a broadband, linearly polarized Log Periodic Dipole Array (LPDA) Antenna, operating over the frequency range of 200 MHz to 1 GHz; and with excellent efficiency between 300 MHz and 1 GHz. This antenna is a compact version of the AL-100, in that the overall length of the antenna has been reduced by over 13 inches, with only a slight compromise in overall performance.

ConstructionThe construction of the ALC-100 is identical to that of the AL-100 Log Periodic, in that it has been designed to be extremely durable, making it an ideal choice for daily use in laboratory environments, both indoors and outdoors, and even under continuous exposure to extreme weather conditions. The antenna elements are solid stainless steel, and the “feeder tubes” are constructed from the same heavy guage, corrosion resistant aluminum.

ApplicationThe ALC-100 Compact Log Periodic Antenna is intended for use as an EMI test antenna for qualification-level regulatory compliance measurements (FCC, CE, RTCA DO-160, FDA, SAE Automotive, etc.). The ALC-100 can also be used in conjunction with an RF power amplifier (up to 50 watts) to generate RF fields associated with RF immunity tests. For high power applications, Com-Power’s ALP-100 Power Log Periodic Antenna is an excellent choice.In addition, a pair of ALC-100 Compact Log Periodic Antennas can be used in lieu of dipole antennas for Normalized Site Attenuation (NSA) calibrations of Open Area Test Sites (OATS) or Semi-Anechoic Chambers (SAC); thereby avoiding the time-consuming process of tuning the dipole element lengths at each discrete frequency. Notwithstanding the above applications, the ALC-100 can also be used for site comparisons, shielding effectiveness tests of enclosures, field monitoring, site surveys and other general purposes.

MountingThe mounting assembly for the the ALC-100 incorporates a hinge mechanism to quickly and easily change the antenna polarization. The assembly is equipped with a standard 1/4-inch x 20 mounting hole, which allows it to be affixed to Com-Power’s AT-812 Antenna Tripod, AM-400 Antenna Mast, or any other similar structure with compatible mounting arrangements.

Features • Frequency Range

300 MHz to 1 GHz (useable from 200 MHz)

• Transmit & Receive Capabilities emissions/immunity applications

• Individual Calibration Included per ANSI C63.5 with NIST traceability

• Three-year Standard Warranty

CalibrationEach antenna is individually calibrated per ANSI C63.5 with NIST traceability. The calibration data and certificate is provided. Recognized ISO 17025 accredited calibration is also available upon request.

(W)5.1"

(H)21.5"

(D) 25.5"

Com-Power Corporation 19121 El Toro Road, Silverado, California 92676 (949) 459-9600 www.com-power.comRev. D10.18

Compact Log Periodic AntennaALC-100

Page 2: Compact Log Periodic Antenna - Com-Power Corporation · Log Periodic Antenna is an excellent choice. In addition, a pair of ALC-100 Compact Log Periodic Antennas can be used in lieu

Specifications

All specifications are subject to change without notice. All values are typical, unless specified.

Typical Field Strength with 50W Input Power

Product Name Compact Log Periodic Antenna

Frequency Range 300 MHz to 1 GHz (useable from 200 MHz)

Polarization Linear

Nominal Impedance 50Ω

Power Handling 50 Watts (continuous)

Connector N-type (female)

Antenna Factor 13.3 to 23.2 (average: 19.3) [dB(m-1)]

Isotropic Gain 2.1 to 7.8 (average: 6.6) dBi

VSWR 1.05 to 2.52 (average: 1.57) :1

Return Loss 7.3 to 31.0 (average: 16.4) dB

Radiated Field Strength see graph below

Specifications FCC, CISPR, EN, ETSI, FAA, MIL-STD-461, SAE, etc.

Dimensions (H x W x D) 21.5” x 5.1” x 25.5” [54.6 x 13 x 64.8 cm]

Weight 2 lbs. [0.9 kg]

1

10

100

200 300 400 500 600 700 800 900 1000Frequency (MHz)

Field

Str

engt

h (V

/m)

3 meters

1 meter

Ant. Input (W) * 30 * [numeric] Gain

Test Distance (m)Field Strength (V/m)

Typical Forward Power Levels

0.01

0.1

1

10

100

200 300 400 500 600 700 800 900 1000Frequency (MHz)

Forw

ard

Pow

er (W

atts

)

3 V/m @ 3m

3 V/m @ 1m

Field Strength (V/m)2 * Test Distance (m)2

30 * [numeric] Isotropic Antenna GainForward Power (Watts) =

Voltage Standing Wave Ratio (VSWR)

1

10

200 300 400 500 600 700 800 900 1000Frequency (MHz)

VSW

R (x

:1)

ALC-100 Compact Log Periodic AntennaALC-100 with 4 dB Impedance Matching PadALC-100 with 2 dB Impedance Matching Pad

Return Loss

1

10

100

200 300 400 500 600 700 800 900 1000Frequency (MHz)

Retu

rn Lo

ss (d

B)

ALC-100 Compact Log Periodic AntennaALC-100 with 4 dB Impedance Matching PadALC-100 with 2 dB Impedance Matching Pad

Antenna Factors / Isotropic Gain

10

20

30

40

50

200 300 400 500 600 700 800 900 1000

Frequency (MHz)

Ante

nna F

acto

r [dB

(m-1

)]

-25

-15

-5

5

15

Isotropic Gain (dBi)

1 meter

10 meters

1 meter

10 meters

-3 dB [Half-Power] Beamwidth

0

100

200

300

200 300 400 500 600 700 800 900 1000

Frequency (MHz)

-3 d

B Be

amw

idth

(deg

rees

)

H-Plane

E-Plane

PAM-103 Preamplifier

AT-812 Antenna Tripod

Also Available:AL-130R Active Loop Antenna

AM-741R Active Monopole AntennaAB-900A/ABF-900A Biconical Antennas

Accessories availablefrom Com-Power:

SPA-900TG Series Spectrum Analyzers

Com-Power Corporation 19121 El Toro Road, Silverado, California 92676 (949) 459-9600 www.com-power.comRev. D10.18

Compact Log Periodic AntennaALC-100