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2. Antenna types - Wikipedia

   en.wikipedia.org/wiki/Antenna_types

   Used for elevated base station antennas for land mobile radio systems such as police, ambulance, and taxi dispatchers. Mast radiator A radio tower in which the tower structure itself serves as the antenna. Common form of transmitting antenna for AM radio stations and other MF and LF transmitters.

3. Mobile radio - Wikipedia

   en.wikipedia.org/wiki/Mobile_radio

   A modern mobile radio consists of a radio transceiver, housed in a single box, and a microphone with a push-to-talk button. Each installation would also have a vehicle-mounted antenna connected to the transceiver by a coaxial cable.

4. Smart antenna - Wikipedia

   en.wikipedia.org/wiki/Smart_antenna

   Smart antennas (also known as adaptive array antennas, digital antenna arrays, multiple antennas and, recently, MIMO) are antenna arrays with smart signal processing algorithms used to identify spatial signal signatures such as the direction of arrival (DOA) of the signal, and use them to calculate beamforming vectors which are used to track and locate the antenna beam on the mobile/target.

5. Antenna (radio) - Wikipedia

   en.wikipedia.org/wiki/Antenna_(radio)

   An example of a low-gain antenna is the whip antenna found on portable radios and cordless phones. Antenna gain should not be confused with amplifier gain, a separate parameter measuring the increase in signal power due to an amplifying device placed at the front-end of the system, such as a low-noise amplifier.

6. History of smart antennas - Wikipedia

   en.wikipedia.org/wiki/History_of_smart_antennas

   Karl Jansky, discoverer of the radio waves emanating from the Milky Way galaxy, used a Bruce array for experiments he conducted in 1931. [14] Modern phased array radio telescopes typically consist of a number of small, interconnected antennas such as the Murchison Widefield Array in Australia, constructed in 2012. [15]

7. Halo antenna - Wikipedia

   en.wikipedia.org/wiki/Halo_antenna

   Sketched design of a typical modern-style halo antenna. The sizes of, and space between the round end-plates is adjusted to tune the antenna to resonance; for some halos they are omitted. The thick, black, vertical line is the feed cable , ending in a small black box that contains a trimmer capacitor that with the gamma arm length, impedance ...