ANT-DB1-RAF-RPS Linx Technologies

ANT-DB1-RAF-xxx Data Sheet by Product Description 4.0 mm (0.16 ) The RAF is a compact, cosmetically attractive, dual-band, -wave antenna covering the popular 2.45 and emerging 5GHz bands. The antenna features a tilt and swivel joint which allows it to be oriented at straight or right angle to the product or conveniently folded for storage and shipment. It attaches using an SMA or Part 15 compliant 66.0 mm RP-SMA connector. (2.60 ) Features Tilts and rotates 104.9 mm (4.13 ) Dual-band Excellent performance Omni-directional pattern 17.8 mm Very low VSWR (0.70 ) Rugged & damage-resistant Standard SMA or Part 15 compliant RP-SMA 11.3 mm (0.44 ) connector 9.4 mm (0.37 ) Electrical Specifications Recom. Freq. Range: Band 1: 2.402.483GHz Band 2: 5.155.825GHz 11.0 mm (0.43 ) Peak Gain: Band 1: 2.5dBi Band 2: 4.6dBi Wavelength: -wave VSWR: 1.9 typical at center Impedance: 50-ohms Connection: RP-SMA or SMA Oper. Temp. Range: 40C to +80C Electrical specifications and plots measured on 10.16 cm x 10.16 cm (4.00 x 4.00 ) reference ground plane Ordering Information ANT-DB1-RAF-RPS (with RP-SMA connector) ANT-DB1-RAF-SMA (with SMA connector) 1 Revised 12/10/13VSWR Graph VSWR 1.187 Reflected Power 1.652 3:1 25% 2:1 11% CENTER 2450.000MHz SPAN 200.000MHz CENTER 5450.000MHz 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 antennas 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. Data Sheet ANT-DB1-RAF-xxx 2 by