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2. Rubber ducky antenna - Wikipedia

   en.wikipedia.org/wiki/Rubber_ducky_antenna

   The rubber ducky antenna (or rubber duck aerial) is an electrically short monopole antenna, invented by Richard B. Johnson, that functions somewhat like a base-loaded whip antenna. It consists of a springy wire in the shape of a narrow helix , sealed in a rubber or plastic jacket to protect the antenna. [ 1 ]

3. Trainphone - Wikipedia

   en.wikipedia.org/wiki/Trainphone

   The trainphone signal — low frequency current in the hundreds of kilohertz — was passed through the track or wires and induced a corresponding current in the locomotive or car's receiving antenna. The range was only a hundred feet or so, but this was sufficient. PRR E8 diesel locomotive with trainphone antenna

4. Whip antenna - Wikipedia

   en.wikipedia.org/wiki/Whip_antenna

   Whip antenna on portable FM radio receiver Whip antenna on car. A whip antenna is an antenna consisting of a straight flexible wire or rod. The bottom end of the whip is connected to the radio receiver or transmitter. A whip antenna is a form of monopole antenna. The antenna is designed to be flexible so that it does not break easily, and the ...

5. Short backfire antenna - Wikipedia

   en.wikipedia.org/wiki/Short_backfire_antenna

   A short backfire antenna (or short back-fire, SBA, SBF or SBFA) is a type of a directional antenna, characterized by high gain, relatively small size, and narrow band. It has a shape of a disc with a straight edge, with a vertical pillar with a dipole acting as the driven element in roughly the middle and a conductive disc at the top acting as ...

6. Antenna types - Wikipedia

   en.wikipedia.org/wiki/Antenna_types

   However a few types of linear antennas are specifically made too small to resonate – short whip antennas, and unplanned random wire antennas, for example. Loop antennas ("magnetic" antennas) [ b ] Loops are ring-like antennas made out of segments of wire or metal tubing bent into a circle or polygon – any regular or irregular two ...

7. How Micromobility Is Providing Alternatives to Short Car Trips

   www.aol.com/micromobility-providing-alternatives...

   How Micromobility Is Providing Alternatives to Short Car Trips. Sarah Sax. September 18, 2024 at 1:46 PM. A lmost 70% of the world’s population is expected to live in urban areas by 2050.