CombiLog Antenna - Com-Power Corporationelements, commonly referred to as “bow-tie” elements....
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Application The AC-220 CombiLog Antenna is suitable for use as an EMI test antenna for qualification-level regulatory compliance measurements as per most regulatory requirements. The AC-220 is equally suitable for use as a transmitting antenna over the frequency range of 80 MHz to 2 GHz. The antenna is driven by an RF power amplifier for the purpose of establishing radiated RF fields for product immunity tests. It is capable of handling power levels up to 500 Watts. Notwithstanding the above applications, the AC- 220 can also be used for test site comparisons, shielding effectiveness tests of large enclosures, field monitoring, site surveys, etc. Mounting The mounting assembly for the the AC-220 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 a tripod, antenna mast or other mounting structure. Com-Power’s AT-812 Tripod and AM-400 Antenna Mast, are the recommended supports for this antenna. Description The AC-220 CombiLog is a broadband, linearly polarized hybrid antenna. Hybrid antennas are, put simply, log periodic antennas with the feed lines modified to include a set of low frequency antenna elements, commonly referred to as “bow-tie” elements. Additionally, common-mode chokes are typically installed to reduce common-mode currents flowing on the outer conductor of the coaxial feed line/receive cable. By essentially combining a log periodic and biconical antenna, a hybrid antenna can typically cover, at a minimum, the frequency range of the combined antenna types. The AC-220 operates from 20 MHz to 2 GHz as a receiving antenna. Using typical conventional antennas, four separate antennas would be needed to cover the same frequency range. Com-Power Corporation 19121 El Toro Rd., Silverado, California 92676 (949) 459-9600 www.com-power.com 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 also available upon request. CombiLog Antenna AC-220 (D) 38” 96.5 cm (H) 50” 127 cm (W) 27.6” 70.1 cm Rev. D07.19 Features • Wide Frequency Range: 20 MHz to 2 GHz (emissions) 80 MHz to 2 GHz (immunity) • Complies with ±1 dB Antenna Symmetry/Balance Requirements of ANSI C63.5 and CISPR 16-1-4 • Good Cross-Polarization Performance • Transmit & Receive Capabilities • Individual Calibration Included • Three-year Standard Warranty
Transcript of CombiLog Antenna - Com-Power Corporationelements, commonly referred to as “bow-tie” elements....
ApplicationThe AC-220 CombiLog Antenna is suitable for use as an EMI test antenna for qualification-level regulatory compliance measurements as per most regulatory requirements. The AC-220 is equally suitable for use as a transmitting antenna over the frequency range of 80 MHz to 2 GHz. The antenna is driven by an RF power amplifier for the purpose of establishing radiated RF fields for product immunity tests. It is capable of handling power levels up to 500 Watts.Notwithstanding the above applications, the AC-220 can also be used for test site comparisons, shielding effectiveness tests of large enclosures, field monitoring, site surveys, etc.
MountingThe mounting assembly for the the AC-220 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 a tripod, antenna mast or other mounting structure. Com-Power’s AT-812 Tripod and AM-400 Antenna Mast, are the recommended supports for this antenna.
DescriptionThe AC-220 CombiLog is a broadband, linearly polarized hybrid antenna. Hybrid antennas are, put simply, log periodic antennas with the feed lines modified to include a set of low frequency antenna elements, commonly referred to as “bow-tie” elements. Additionally, common-mode chokes are typically installed to reduce common-mode currents flowing on the outer conductor of the coaxial feed line/receive cable. By essentially combining a log periodic and biconical antenna, a hybrid antenna can typically cover, at a minimum, the frequency range of the combined antenna types. The AC-220 operates from 20 MHz to 2 GHz as a receiving antenna. Using typical conventional antennas, four separate antennas would be needed to cover the same frequency range.
Com-Power Corporation 19121 El Toro Rd., Silverado, California 92676 (949) 459-9600 www.com-power.com
CalibrationEach antenna is individually calibrated per ANSI C63.5 with NIST traceability. The calibration data and certificate is provided. Recognized ISO 17025 accredited calibration also available upon request.
CombiLog AntennaAC-220
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(D) 38”96.5 cm
(H) 50”127 cm
(W) 27.6”70.1 cm
Rev. D07.19
Features • Wide Frequency Range : 20 MHz to 2 GHz (emissions)
80 MHz to 2 GHz (immunity)• Complies with ±1 dB Antenna Symmetry/Balance
Requirements of ANSI C63.5 and CISPR 16-1-4 • Good Cross-Polarization Performance• Transmit & Receive Capabilities• Individual Calibration Included • Three-year Standard Warranty
Com-Power Corporation 19121 El Toro Rd., Silverado, California 92676 (949) 459-9600 www.com-power.comRev. D07.19
Specifications All specifications are subject to change without notice. All values are typical, unless specified.
Product Name CombiLog Antenna
Frequency Range 20 MHz to 2 GHz (as receive antenna - emissions testing) 80 MHz to 2 GHz (as transmit antenna - immunity testing)
Polarization Linear
Ant. Symmetry (Balance) < ±1 dB (30 MHz to 2 GHz)
Cross Polarization Rejection see graph below
Nominal Impedance 50Ω
Power Handling (CW) 500 Watts (continuous)
Connector N-type (female)
Antenna Factor see graph below
Isotropic Gain see graph below
VSWR see graph below
Return Loss see graph below
Specifications FCC, CISPR, EN, ETSI, etc.
Dimensions (H x W x D) 50” x 27.6” x 38” [127 x 70.1 x 96.5 cm]
Weight 10.5 lbs. [4.8 kg]
PAM-103 Preamplifier (1 MHz to 1 GHz)
AT-812 Antenna Tripod
Also Available:AH-840 Horn Antenna (18-40 GHz)
AB-900A Biconical AntennaAL-100, ALC-100, ALP-100 Log Periodic Antennas
Related Items available from Com-Power...
AH-118 Horn Antenna (1-18 GHz)
CombiLog AntennaAC-220
Typical Antenna Factors/Isotropic Gain
-40
-30
-20
-10
0
10
20
0
10
20
30
40
50
60
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Isotropic Gain (dBi)
Anten
na Fa
ctor (
dB/m
)
Frequency (MHz)
Typical Cross Polarization Rejection0
10
20
30
40
50
600 200 400 600 800 1000
Cross
Polar
izatio
n Reje
ction
(dB)
Frequency (MHz)
Typical Voltage Standing Wave Ratio (VSWR)
1
10
100
0 200 400 600 800 1000 1200 1400 1600 1800 2000
VSWR
(x:1)
Frequency (MHz)
AC-220 CombiLog Antenna AC-220 CombiLog Antenna with 5 dBImpedance Matching Pad
Typical Return Loss
1
10
100
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Retur
n Loss
(dB)
Frequency (MHz)
AC-220 CombiLog Antenna AC-220 CombiLog Antenna with 5 dBImpedance Matching Pad
Typical Field Strength with 500W Input Power
10
100
1000
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Field
Stren
gth (V
/m)
Frequency (MHz)
@ 3 meters
@ 1 meter
Ant. Input (Watts) * 30 * [numeric] Ant. Gain
Test Distance (meters)Field Strength
(Volts per meter)=
Typical Forward Power Levels
0.1
1
10
100
1000
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Anten
na In
put P
ower
(Watt
s)
Frequency (MHz)
20 V/m @ 3m
10 V/m @ 3m
20 V/m @ 1m
10 V/m @ 1m
Field Strength (V/m)2 * Test Distance (meters)2
30 * [numeric] Isotropic Antenna GainAntenna InputPower (Watts)
=
