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3. Antennas & Cables

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    Comparing version 21:43, 25 Feb 2019 by stuart with version 22:07, 25 Feb 2019 by stuart.

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    A variety of antenna options exist for VHF telemetry. To date, collaborators have used 9, 6, 5 and 3-element yagiyyagi directional antennas, and single-pole omni-, j-pole antennas. 9-element yagisYagis have a long, very narrow detection range, whereas 3, 5, or 6-element Yagis have a relatively shorter and wider detection range.   Generally 9-element antenna are great for creating long, linear invisible fences to detect passing animals or to detect flights, or departures of animals from specifici sites. Smaller 6, 5, or 3-element antenna are better for monitoring animals on the ground, or covering a broader airspace over a smaller area. Omni-directional antennas are best suited for determining species presence-absence patterns (e.g. seabirds at a colony), but not for providing directional information (e.g. departure directions of songbirds from a stopover site). Many projects may wish to utilize one or more antenna types depending on their research questions.

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    Version from 21:43, 25 Feb 2019

    This revision modified by stuart (Ban)

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    A variety of antenna options exist for VHF telemetry. To date, collaborators have used 9, 6, 5 and 3-element yyagi directional antennas, and single-pole omni-, j-pole antennas. 9-element Yagis have a long, very narrow detection range, whereas 3, 5, or 6-element Yagis have a relatively shorter and wider detection range.   Generally 9-element antenna are great for creating long, linear invisible fences to detect passing animals or to detect flights, or departures of animals from specifici sites. Smaller 6, 5, or 3-element antenna are better for monitoring animals on the ground, or covering a broader airspace over a smaller area. Omni-directional antennas are best suited for determining species presence-absence patterns (e.g. seabirds at a colony), but not for providing directional information (e.g. departure directions of songbirds from a stopover site). Many projects may wish to utilize one or more antenna types depending on their research questions.

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    Version as of 22:07, 25 Feb 2019

    This revision modified by stuart (Ban)

    ...

    A variety of antenna options exist for VHF telemetry. To date, collaborators have used 9, 6, 5 and 3-element yagi directional antennas, and single-pole omni-, j-pole antennas. 9-element yagis have a long, very narrow detection range, whereas 3, 5, or 6-element Yagis have a relatively shorter and wider detection range.   Generally 9-element antenna are great for creating long, linear invisible fences to detect passing animals or to detect flights, or departures of animals from specifici sites. Smaller 6, 5, or 3-element antenna are better for monitoring animals on the ground, or covering a broader airspace over a smaller area. Omni-directional antennas are best suited for determining species presence-absence patterns (e.g. seabirds at a colony), but not for providing directional information (e.g. departure directions of songbirds from a stopover site). Many projects may wish to utilize one or more antenna types depending on their research questions.

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