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This is called an electrically short whip. The coil is added at the base of the whip (called a base-loaded whip) or occasionally in the middle (center-loaded whip). In the most widely used form, the rubber ducky antenna, the loading coil is integrated with the antenna itself by making the whip out of a narrow helix of springy wire. The helix ...
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]
A whip antenna with several rods extending horizontally from base of the whip in a star-shaped pattern, similar to an upside-down radiate crown, that form the artificial, elevated ground plane that gives the antenna its name. The ground plane rods attach to the ground wire of the feedline, the other wire feeds the whip.
It has a base of sour cream with dried onion, onion powder, garlic powder, and salt mixed in. Top it with parsley for freshness. Get Ree's French Onion Dip recipe . Erica Kastner / The Pioneer Woman
However, because of the inductance added by the helical shape, the antenna acts like an inductively loaded monopole; at its resonant frequency it is shorter than a quarter-wavelength long. Therefore, normal-mode helices can be used as electrically short monopoles, an alternative to center- or base-loaded whip antennas , in applications where a ...
Loaded Cabbage Casserole. Photographer: Grant Webster, Food Stylist: Holly Dreesman, Prop Stylist: Lexi Juhl ... but with tender cooked cabbage as a base instead. The cheesy sauce coats the ...
Red produce, like watermelon and tomatoes, contain the antioxidant lycopene; blue and purple picks like eggplant and blueberries are rich in anthocyanins; and orange fruits and veggies like ...
When so loaded the antenna presents a pure resistance to the transmission line, preventing energy from being reflected. The loading coil is often placed at the base of the antenna, between it and the transmission line (base loading), but for more efficient radiation, it is sometimes inserted near the midpoint of the antenna element (center ...