Does anyone have a recommendation or best practices for placing sentinel nanotags in the environment for about 1 month? One option is to place tags uncovered on the ground (or hanging from a tree trunk or shrub), and without placing the tag in housing. Alternatively, we could cover the tag with a little roof.
Yolanda E. Morbey, Ph.D.
Associate Professor, Department of Biology
Chair, Undergraduate Program in Environmental Science
Western University, London, Ontario, N5A 6B7
Office: BGS 2074
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This manuscript also describes a bird model for evaluating antennas."While it is generally straightforward to measure the efficiencyof a generic antenna, measurement of the present radiatingsystem with an electrically small monopole antenna is challenging.The transmitter itself is extremely small, on the order of 1cm3 orless. Therefore, without the bird present, the monopole has avery small counterpoise, at best; with the transmitter mounted ontothe bird, the radiating system becomes more complex. In fact, thelack of a large or well-defined ground plane in this case means thatboth the body of the transmitter, as well as the bird, may serve asparts of the counterpoise for the monopole."
I've also seen a suggestion from Kent Britain (http://wa5vjb.com/), although it's not quite clear what volume of water to mix the sugar/salt into (I've sent a request for clarification):"For small "birds" the finger of a lab glove does very well, for largermodels, I use plastic bottles. Qualitatively, the shape of these bodiesdoes not matter much, while the mass is really important. Transmitterscan be fitted using the harness intended for attaching the radios to thebirds."
Best,"I suggest a small plastic bottle or plastic bag about 2/3rd the size ofthe bird and fill it with water. Add about 10 spoons of sugar and 1 spoon ofsalt. This will have the same Er and loss tangent as flesh.Yes, it takes a while to get all that sugar to dissolve.With a thick cloth to simulate the feathers, you can tune the antenna ona simulated bird."
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