This letter presents a frequency-reconfigurable antenna for cognitive radio application in sub-6 GHz 5G band. The proposed antenna consists of a wideband (WB) monopole integrated with a narrowband ...

This antenna, which is composed of curved metallic strips, radiates ultrashort pulses in the frequency band 300 MHz - 3 GHz with very low dispersion, a high gain and a low cross-polarization in the ...

The beam width (in radians) is roughly the wavelength of the radio wave divided by the diameter of the antenna. For example, a 100 meter antenna observing at a wavelength of 21 centimeters (a ...