Mass Communication Study Notes

Ringo antenna . Omnidirectional Vertical Antenna Band of 11 meters . Among the projects that radio amateurs can carry out without much difficulty , especially those that make transmissions in the 11-meter band, is the construction of a truly interesting antenna . Summary [ hide ] 1 Features 2 Advantages 3 Structures 4 Sources characteristics It is a very efficient antenna, both for emission and reception in this frequency range within 27 MHz . This vertical type antenna … Read more

Reflective antennas . Essentially, an antenna is a metallic conducting system capable of radiating and receiving electromagnetic waves, and a waveguide is a metallic conductive medium through which high-frequency electromagnetic energy is propagated, usually between an antenna and a transmitter, a receiver, or both. An antenna is used as the interface between a transmitter and free space or … Read more

Antennas for radio receivers. The radiation principle of a transmitting antenna is based on the creation of an electromagnetic field around a conductive wire, which is fed with radio frequency energy. If we bring another conductor with the same characteristics to this conductor wire, the created magnetic field will act on it, inducing currents and voltages proportional to the radiofrequency energy supplied by the first … Read more

The antenna J , J-pole , J-Pole or just J , is an omnidirectional antenna half wave fed at one end that can be used both in mobile or portable base. No need ground plane or radial. It is cheap, simple and fast to build, as it can use a wide variety of materials and techniques. Summary [ hide ] 1 Features 2 Advantages of this design 3 Construction of the Antenna … Read more

The G5RV Antenna ; It is an antenna for radio amateur use for all bands between 80m and 10m . It consists of a 31m long Multiband HF Dipole that has a ‘ladder’ cable feed of 450 ohms impedance is 9.50m long. At the end of the parallel ladder cable, a 50 ohm coaxial line can be placed (requires balun). Summary [ hide ] 1 Story 2 Features 3 Construction 4 Sources History These types of antennas were already well known in the 1930s in the United … Read more

Double bazooka antenna: The BAZOOKA antenna is a half-wave antenna that works efficiently in a band with no change in ROE. The design of the BAZOOKA antenna was developed in the 1940s in the United States as a radar antenna , being modified for the use of radio amateurs in the 1950s . Over time Double Bazooka has been shown to outperform a standard single band dipole. It is a very popular … Read more