Overview

The 25316 Yagi antenna is used with the TX320, TX312, and OMNISAT-M satellite transmitters. This right-hand circular polarized (RHCP) antenna has a gain of 11.0 dBi. The 25316 must be aimed at the proper azimuth and inclination to hit the satellite. An adjustable mounting bracket is included. A COAXNTN-L cable is required to attach the antenna to the satellite transmitter.

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Detailed Description

Campbell Scientific's 25316 is a cross-Yagi antenna manufactured for our TX320, TX312, and SAT HDR GOES transmitters, and may also be used with some GOES transmitters manufactured by other companies. This high-gain, robust, lightweight antenna provides optimum performance for all fixed-location, Satellite Data Collection Platforms (DCPs). It consists of two quadrature-phased, five-element Yagi antennae, mounted on a common aluminum boom. The antenna’s screw-in elements facilitate shipping, storage, and fi eld installation.

Yagi Antennas

Yagi antennas are a type of directional antenna that consists of a rod pointed in the direction of the transmission/reception and several cross bars oriented at a 90° angle to the main rod. The rods' length and spacing are optimized to transmit and receive transmission in the desired frequency band.

Note: On March 10 2009 the 25316 11-dBi Yagi antenna replaced the 17751 11-dBi Yagi antenna. The 17751 antenna had replaced the 12261 9-dBi Yagi antenna on August 20, 2004.

Specifications

Electrical

  • Frequency: 401.8 MHz (nominal)
  • Bandwidth: 2 MHz (minimum)
  • Input Power: 15 Watts (maximum)
  • Input Impedance: 50 Ω (nominal)
  • SWR: 1.50 (maximum)
  • Directivity: +14.0 dBic (nominal)
  • Gain: 11.0 dBi
  • Polarization: Right hand circular
  • Half Power Beam Width: 47° (nominal)
  • Connector: Type N Female

Environmental

  • Wind: 100 knots
  • Ice and Snow: 100 lb/ft2
  • Rain: 5 in./hr
  • Temperature: -65° to +65°C
  • Relative Humidity: 0 to 100%
  • Altitude: -1000 to +15,000 ft MSL
  • Lightning: Antenna and elements at DC ground

Mechanical

  • Pipe Mounting: 3.8 cm to 6.0 cm diameter (1.5 in. to 2.375 in.)
  • Azimuth Adjustment: 360°

Compatibility

Transmitters

The 25316 Yagi antenna is used with the TX320, TX312, SAT HDR GOES, EUMETSAT, and OMNISAT-M satellite transmitters. It may also be used with some GOES transmitters manufactured by other companies.

Antenna Cable

The COAXNTN cable is used to attach the antenna to the transmitter.

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