ANT-2.4-CW-RCT-RP

ANT-2.4-CW-RCT-xx Data Sheet by Product Description 10.0 mm (0.39") The RCT Series ½-wave antenna delivers outstanding performance with an innovative articulating base that allows it to tilt 90° and rotate 360° for optimum orientation. The antenna’s internal counterpoise eliminates external ground plane dependence and maximizes performance. The RCT attaches via a standard SMA or Part 15 compliant RP-SMA connector Features • • • • • • • • 95.6 mm (3.76") Internal counterpoise Tilts and rotates Excellent performance Omni-directional pattern Very low VSWR Fully weatherized Rugged and damage-resistant Standard SMA or Part 15 compliant RP-SMA connector 113.0 mm (4.44") 8.4 mm (0.33") 9.0 mm (0.35") Electrical Specifications Center Frequency: Recom. Freq. Range: Wavelength: VSWR: Peak Gain: Impedance: Connector: Oper. Temp. Range: 5.1 mm (0.20") 28.0 mm (1.10") 2.45GHz 2.40–2.50GHz ½-wave ≤ 1.9 typical at center 2.2dBi 50-ohms RP-SMA –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 Ordering Information ANT-2.4-CW-RCT-RP (with RP-SMA connector) ANT-2.4-CW-RCT-SS (with SMA connector) –1– Revised 1/13/14 VSWR Graph VSWR 1.003 Reflected Power 3:1 25% 2:1 11% 1:1 2350MHz 0% 2550MHz 2450MHz 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. –2– Data Sheet ANT-2.4-CW-RCT-xx by