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2. Whip antenna - Wikipedia

   en.wikipedia.org/wiki/Whip_antenna

   Vertical whip antennas are widely used for nondirectional radio communication on the surface of the Earth, where the direction to the transmitter (or the receiver) is unknown or constantly changing, for example in portable FM radio receivers, walkie-talkies, and two-way radios in vehicles. This is because they transmit (or receive) equally well ...

3. Antenna types - Wikipedia

   en.wikipedia.org/wiki/Antenna_types

   A competing third criterion is the number and bandwidth of the frequenc(y/ies) that a single antenna intercepts or emits. A fourth design goal is to make the antenna directional: To project or intercept radio waves from only one vertical and / or horizontal direction as exclusively as possible. Simple antennas

4. Halo antenna - Wikipedia

   en.wikipedia.org/wiki/Halo_antenna

   A halo antenna is a self-resonant antenna: Its feedpoint impedance is reactance-free / purely resistive at the design frequency. A small loop antenna, on the other hand, has lower radiation resistance [b] and is not self-resonant; it requires some form of impedance matching to counter the loop's reactance – in practice, this usually consists ...

5. Monopole antenna - Wikipedia

   en.wikipedia.org/wiki/Monopole_antenna

   This design is used for the mast radiator transmitting antennas employed for radio broadcasting in the MF and LF bands. At lower frequencies the antenna mast is electrically short giving it a very small radiation resistance , so to increase efficiency and radiated power capacitively toploaded monopoles such as the T-antenna and umbrella antenna ...

6. Fractal antenna - Wikipedia

   en.wikipedia.org/wiki/Fractal_antenna

   A fractal antenna's response differs markedly from traditional antenna designs, in that it is capable of operating with good-to-excellent performance at many different frequencies simultaneously. Normally, standard antennas have to be "cut" for the frequency for which they are to be used—and thus the standard antennas only work well at that ...

7. Loop antenna - Wikipedia

   en.wikipedia.org/wiki/Loop_antenna

   A typical AM broadcast radio loop antenna wound on ferrite may have a cross sectional area of only 1 cm 2 (0.16 sq in) at a frequency at which an ideal (lossless) antenna would have an effective area some hundred million times larger. Even accounting for the resistive losses in a ferrite rod antenna, its effective receiving area may exceed the ...