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Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 2
Technical content
Features
- Cost-effective
- Internal counterpoise
- Tilts 180 degrees
- Outstanding performance
- Omni-directional pattern
- Low VSWR
- Integral 12" (30.48 cm) RG-178 coax cable or 1.32 mm coax (U.FL) Electrical Specifications Center Frequency: 2.45GHz Recom. Freq. Range: 2.35-2.60GHz Wavelength: ½-wave VSWR: ≤1.9 typical at center Impedance: 50-ohms Connection: Straight-cut or U.FL/MHF Cable: 12" (30.48 cm) RG-178 coax or 1.32 mm coax (U.FL) Oper. Temp. Range: –40°C to +90°C Electrical specifications and plots measured on 10.16 cm x 10.16 cm (4.00" x 4.00") reference ground plane ANT-2.4-PML-xxx Data Sheet by
Ordering Information
ANT-2.4-PML (with straight cut RG-178 coax) ANT-2.4-PML-UFL (with U.FL/MHF compatible connector and 1.32mm coax) 12.1 mm (0.48") 35.2 mm (1.39") 8.2 mm (0.32") 123.0 mm (4.84") 7.9 mm (0.31") 150.3 mm (5.92") 6.0 mm (0.24") I-PEX silhouette shown in shadow Available with Straight Cut Cable or U.FL Connector
– 2 – by Data Sheet ANT-2.4-PML-xxx VSWR Graph What is VSWR? The Voltage Standing Wave Ratio (VSWR) is a measurement of how well an antenna is matched to a source impedance, typically 50-ohms. It is calculated by measuring the voltage wave that is headed toward the load versus the voltage wave that is reflected back from the load. A perfect match will have a VSWR of 1:1. The higher the first number, the worse the match, and the more inefficient the system. Since a perfect match cannot ever be obtained, some benchmark for performance needs to be set. In the case of antenna VSWR, this is usually 2:1. At this point, 88.9% of the energy sent to the antenna by the transmitter is radiated into free space and 11.1% is either reflected back into the source or lost as heat on the structure of the antenna. In the other direction, 88.9% of the energy recovered by the antenna is transferred into the receiver. As a side note, since the “:1” is always implied, many data sheets will remove it and just display the first number. How to Read a VSWR Graph VSWR is usually displayed graphically versus frequency. The lowest point on the graph is the antenna’s operational center frequency. In most cases, this will be different than the designed center frequency due to fabrication tolerances. The VSWR at that point denotes how close to 50-ohms the antenna gets. Linx specifies the recommended bandwidth as the range where the typical antenna VSWR is less than 2:1. VSWR Reflected Power 3:1 2:1 1:1 25% 11% 2.45GHz 2.60GHz2.30GHz 1.227