A long wire antenna is a type of antenna in which the length of the wire is usually greater than the length of the half-wave dipole i.e., λ/2. These are also known as harmonic antennas. It offers operating frequency range between 500 kHz to 30 MHz. Content: Long Wire Antenna Introduction Construction Working Radiation Pattern …
Definition: Helical antenna is a type of antenna that is designed using conducting wire and is constructed in the shape of a helix. These antennas are considered as one of the simplest antennas and are widely used in very high and ultra-high frequency operations. So, finds applications in extraterrestrial communication like satellite relays etc. The …
Definition: Horn antenna is a type of antenna which is constructed when the end of the antenna is flared out or tapered in the shape of a horn. Horn antenna operates in microwave frequency. These operate in ultra-high and super-high frequencies ranging between 300 MHz to 30 GHz. It is generally considered as a waveguide …
Definition: The type of antenna which is formed by connecting long wires in the orientation of a rhombus is known as a rhombic antenna. Its basis of operation is similar to travelling wave radiator. It is also known as a diamond antenna. These are highly directional broadband antenna that radiates maximal power along the axis. …
Definition: An antenna that is formed by etching out a patch of conductive material on a dielectric surface is known as a patch antenna. The dielectric material is mounted on a ground plane, where the ground plane supports the whole structure. Also, the excitation to the antenna is provided using feed lines connected through the …
Definition: A type of antenna with an opening cut of certain dimensions in a metallic conductor which is excited using a two-wire transmission line or coaxial cable is known as a slot antenna. These antennas operate in the frequency ranging between 300 MHz to 30 GHz. It is generally formed by making an elongated slot …
Definition: An instrument that is used for the analysis of the frequency spectrum of the input signal is known as a spectrum analyzer. It uses frequency domain representation of the RF signals in order to show the relative amplitude level of the signal at various frequencies within a particular range. A signal which shows the …
Definition: A type of antenna which is formed by bending of a coil or uniform wire in the form of loop is known as a loop antenna. Basically, in loop antenna, the RF current-carrying coil is bent to various shapes like circle, square, rectangle, ellipse, etc. Thus we can say it as a current-carrying coil …
Definition: The input impedance of antenna is basically the impedance offered by the antenna at its terminals. It is defined as the ratio of voltage to the current across the two input terminals of the antenna. Generally, the antenna impedance is given as: We have already discussed in our previous article that antennas are used …
Definition: A part of the electromagnetic spectrum that holds the least frequency range and highest wavelength is known as the radio frequency spectrum. It is sometimes referred as radio spectrum or radio wave spectrum. Generally, the radio spectrum has a frequency range between 30 kHz to 300 GHz. We know that an electromagnetic spectrum contains …