What is the bandwidth of a dipole antenna?
Bandwidth Curve for the designed Half-Wave Dipole Antenna Bandwidth of the antenna has shown in the Fig. 4. Bandwidth of the designed antenna has found as 0.54983 GHz. Ranges of frequency at -10 dB are 4.6667 GHz and 5.2165 GHz.
How do you increase dipole bandwidth?
You can increase the bandwidth of a dipole by adding capacitive hats (you may have to shorten the dipole to maintain a given resonant frequency). Conical hats, hemispherical hats, or hats with a circular rim will work better than short 90 degree radial spikes at the ends, or an H shaped dipole.
What is the frequency of a dipole?
The radiation pattern of the FM dipole antenna is shown in the below figure. The FM dipole antenna is generally used for FM broadcasting frequency range between 88 MHz to 108 MHZ.
Is antenna a dipole broadband?
Broadband Dipole Antenna. A standard rule of thumb in antenna design is: an antenna can be made more broadband by increasing the volume it occupies. Hence, a dipole antenna can be made more broadband by increasing the radius A of the dipole. These antennas are also known as wideband dipoles.
How do I know the bandwidth of my antenna?
Bandwidth for antenna can be calculated taking reference level of VSWR=2, or reflection coefficient =-10dB or return loss =10dB. Where, (fmax + fmin)/2 is called center frequency (fc). So, for wideband antennas %bandwidth must be calculated with respect to center frequency.
How can we improve the bandwidth of dipole antenna?
Dipole antennas have a limited bandwidth which restricts their use to narrow bandwidth applications. To improve the functionality of a dipole antenna, additional wire elements can be added to the dipole antenna to increase the impedance matching and bandwidth.
How do I widen my antenna bandwidth?
Bandwidth of antenna can be increased by various methods such as by increasing the thickness of substrate with low dielectric constant, by probe feeding, by cutting slot, by cutting notches and by different shapes of antenna.
What is dipole antenna wavelength?
The dipole antenna is cut and bent for effective radiation. The length of the total wire, which is being used as a dipole, equals half of the wavelength (i.e., l = λ/2). Such an antenna is called as half-wave dipole antenna. This is the most widely used antenna because of its advantages.
Where is dipole antenna used?
Although a variety of radiating antenna types can be used, one option is the dipole antenna. These antennas are often used for satellite communications, radio astronomy as well as for radio communications links of various types.
What is bandwidth in waves?
Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies. It is typically measured in hertz, and depending on context, may specifically refer to passband bandwidth or baseband bandwidth.
What type of feeding techniques helps to increase bandwidth of the antenna?
L-shaped feeding. In [29, 30], an L-shaped probe is used to feed a microstrip patch and demonstrated that by this way, the impedance bandwidth can be increased. This method can be interpolated as a combination of proximity coupled feeding and stacking technique.
How long should my dipole be?
When determining how long to make each leg of a Dipole antenna, dividing the frequency in MHz into 468 will give the overall length. To find the half wave, divide that number by two. This will give you the length of each leg of the antenna.
What determines the bandwidth of an antenna?
– Bandwidth The bandwidth of an antenna refers to the range of frequencies over which the antenna can operate correctly. The antenna’s bandwidth is the number of Hz for which the antenna will exhibit an SWR less than 2:1. The bandwidth can also be described in terms of percentage of the center frequency of the band.