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Biconical Antenna Biconical Antenna AB-900A Features • Frequency Range 25 MHz to 300 MHz • Transmit & Receive Capabilities emissions/immunity applications • Individual Calibration Included per ANSI C63.5 or SAE ARP958 with NIST traceability • Three-year Standard Warranty Description Application The AB-900A is a broadband, linearly polarized Biconical The AB-900A Biconical Antenna is intended for use as Dipole Antenna, operating over the frequency range of an EMI test antenna for qualification-level regulatory 25 MHz to 300 MHz. It can be used as either a receiving compliance measurements (FCC, CE, MIL-STD-461, RTCA antenna (for EMI measurements) or as a transmitting DO-160, FDA, SAE Automotive, etc.). antenna (for immunity tests) for power levels up to 50 The AB-900A can also be used in conjunction with an RF watts. power amplifier (up to 50 watts) to generate RF fields associated with radiated immunity testing. Construction In addition, a pair of AB-900A Biconical Antennas can The antenna elements are constructed using a also be used for Normalized Site Attenuation (NSA) corrosion resistant aluminum, which is powder coated calibrations of Open Area Test Sites (OATS) or Semi- for additional durability. Implemented in the element Anechoic Chambers (SAC) using the Geometry Specific design is a “gamma match” rod, which connects the Correction Factors (GSCF) given in Tables G.1 through element’s center rod to one of the outer elements at G.3 of ANSI C63.5, as its physical dimensions conform to the inside edge of the 90 degree bend. The gamma the minimum and maximum values given in Figure G.1 match is necessary in order to avoid a significant “dip” in of ANSI C63.5 (Dimensions of biconical dipole antennas the antenna’s performance which would otherwise be evaluated for numerical correction). If biconical present between approximately 275 and 290 MHz. antennas have dimensions which do not conform to (H) 51.5” these dimensions, the given GSCF values can not be 24.2” used, and would need to be determined by performing GSCF calibration on a Standard Antenna Calibration Site (SACS) as described in Annex H of ANSI C63.5. (W ) 20.2” Notwithstanding the above applications, the AB-900A (D ) 27.2” can also be used for test site comparisons, shielding effectiveness tests of large enclosures, field monitoring, site surveys and other general purposes. Mounting The recommended support structures for the AB-900A are Com-Power’s AM-400 Antenna Mast and AT-812 Calibration Antenna Tripod. One of the standard AT-812 accessories Each antenna is individually calibrated per ANSI C63.5 is the ATHP-812 Antenna Pipe Holder, which clamps or SAE ARP958 with NIST traceability. The calibration securely around the one-inch diameter feed tube of the data and certificate is provided. Recognized ISO 17025 AB-900A. The ATHP-812 is then secured to a tripod or accredited calibration is also available upon request. mast via its 1/4” x 20 thread mounting hole. Rev. D10.15 Com-Power Corporation 19121 El Toro Rd., Silverado, California 92676 (949) 459-9600 www.com-power.com Biconical Antenna AB-900A Accessories available Specifications from Com-Power: Product Name Biconical Antenna Frequency Range 25 MHz to 300 MHz Polarization Linear PAM-103 Preamplifier Nominal Impedance 50Ω Power Handling 50 Watts (continuous) Connector N-type (female) Antenna Factor 6 to 21 (average: 12.6) [dB(m-1)] Isotropic Gain -15 to 3 (average: -2.9) dBi AT-812 Antenna Tripod VSWR 1.2 to 34 (average: 8.1) :1 Max. Radiated Field see graphs below Test Specifications FCC, CISPR, EN, ETSI, FAA, MIL-STD 461, Automotive, etc. SPA-800 Spectrum Analyzer Dimensions (H x W x D) 51.5” x 20.2” x 27.2” [130.8 x 51.3 x 69.1 cm] Weight 5 lbs. [2.3 kg] Also Available: AL-130 Active Loop Antenna All specifications are subject to change without notice. All values are typical, unless specified. AM-741 Active Monopole Antenna AL-100, ALP-100, ALC-100 Log Periodic Antennas Antenna Factors Isotropic Gain 30 10 Field Strength Measured Voltage Antenna Factor -1 )] (dBμV/m) = (dBμV) + [dB(m )] -1 ) 10 meters m 1 meter Bi B( 20 (d 0 [d in in or 1 meter Ga ct 10 meters c 10 ropi -10 nna Fa nna ot te Is An 0 -20 0 50 100 150 200 250 300 0 50 100 150 200 250 300 Frequency (MHz) Frequency (MHz) Voltage Standing Wave Ratio (VSWR) Return Loss 100 100 AB-900 Biconical Antenna AB-900 with 5 dB AB-900 Biconical Antenna AB-900 with 5 dB Impedance Matching Pad Impedance Matching Pad B) ) (d ss (x:1 10 Lo 10 WR rn tu VS Re 1 1 0 50 100 150 200 250 300 0 50 100 150 200 250 300 Frequency (MHz) Frequency (MHz) Typical Field Strength with 50W Input Power Typical Forward Power Levels 100 100 Field Strength (V/m)2 * Test Distance (m)2 Forward Power (Watts) = ) 30 * [numeric] Isotropic Antenna Gain 1 meter ) tts /m 10 (Wa (V r 3 V/m @ 3m th 3 meters ng 10 Powe d d Stre ar d d 1 el 3 V/m @ 1m rw Fi Ant. Input (W) * 30 * [numeric] Gain Fo Field Strength (V/m) Test Distance (m) 1 0.1 0 50 100 150 200 250 300 0 50 100 150 200 250 300 Frequency (MHz) Frequency (MHz) Rev. D10.15 Com-Power Corporation 19121 El Toro Rd., Silverado, California 92676 (949) 459-9600 www.com-power.com.
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