What is a bowtie antenna?
A bowtie antenna uses triangular elements instead of straight rods as the antenna elements. A bowtie antenna is sometimes called a butterfly antenna because it looks like a butterfly with its wings held open. When the bow tie elements have a metal bar that closes the antenna, it may be called a cat’s whisker antenna.
What is difference between array and antenna?
The antennas radiate individually and while in array, the radiation of all the elements sum up, to form the radiation beam, which has high gain, high directivity and better performance, with minimum losses.
What is antenna array and why it is needed?
An antenna array (often called a ‘phased array’) is a set of 2 or more antennas. The signals from the antennas are combined or processed in order to achieve improved performance over that of a single antenna. The antenna array can be used to: 1. increase the overall gain.
What is the gain of bow tie antenna?
When FSS is kept at 1 mm from the bowtie antenna, the structure resonates at tri-band frequencies at 6.5 GHz, 10.2 GHz, and 13.8 GHz yielding bandwidth of 2.0 GHz, 1.4 GHz, and 1.2 GHz, respectively. The gain obtained at each band is 0.6, 0.2, and 1.0, respectively.
How does a Discone antenna work?
Discone antennas are vertically polarized, but the vertical radiation pattern very narrow. This makes discone antennas most sensitive to signals coming from the horizon rather than a nearby RF source. The gain of discone antennas is similar to that of a dipole antenna. Yet they can have a gain of less than zero.
What do arrays do?
An array is a data structure, which can store a fixed-size collection of elements of the same data type. An array is used to store a collection of data, but it is often more useful to think of an array as a collection of variables of the same type. All arrays consist of contiguous memory locations.
What is meant by an antenna array?
: a radio antenna consisting of numerous parallel wires arranged to transmit or receive substantially more in some directions than in others. — called also beam antenna.
What is the gain of a Discone antenna?
The mobile antenna lists gain as unity and VSWR as 2:1 typical and 2.5:1 max. The specs for the discone are unity gain with a maximum VSWR or 1.5:1 accross 132 Mhz – 3 GHz.
What is the polarization of Discone antenna?
It is usually mounted vertically, with the disc at the top and the cone beneath. Omnidirectional, vertically polarized and with gain similar to a dipole, it is exceptionally wideband, offering a frequency range ratio of up to approximately 10:1.
What is the polarization of a bow tie antenna?
Figure 2. The Bow Tie Antenna. This antenna will have a similar radiation pattern to the dipole antenna, and will have vertical polarization. A L =76.5mm Bow Tie antenna with width W =36mm (so that the angle D =2*atan ( 76.5/36 )= 130 degrees).
How big is the antenna on a bow tie?
VSWR of the Bow Tie Antenna of Figure 3. Our bowtie antenna of Figure 3 is L =76.5mm long, which would be a half-wavelength at f=c/2/L =1.96 GHz. We see the first resonance occurs at about 1.5 GHz.
Who is the professor of bow tie antennas?
STUDY AND IMPLEMENTATION OF WIDEBAND BOW-TIE ANTENNAS by MD RAKIBUL ISLAM Major Professor: Sungkyun Lim Committee: Mohammad Ahad Rami Haddad Electronic Version Approved: December 2017 2 DEDICATION To my family, friends, and loved ones who have given support, encouragement, and guidance throughout many years of education.
What are the names of the different types of antennas?
1 Short Dipole Antenna 2 Dipole Antenna 3 Monopole Antenna 4 Loop Antenna