Abstract
In this paper, A lens antenna with high gain is proposed. The antenna is composed of the microstrip antenna and the hemisphere dielectric lens, and the lens is loaded on the top. The polyethylene is used to fabricated the hemisphere dielectric lens. The antenna has dimensions of 47.58 mm × 47.58 mm × 24.79 mm, which is corresponding to the electrical size of 1.586λ0×1.586λ0×0.826λ0, where λ0 is the free-space wavelength at 10GHz. The impedance bandwidth (return loss<-10dB) is 12.7%(9.24 GHz-10.51 GHz), and the peak gain is 9.06 dBi. The hemisphere dielectric lens can improve the gain of the microstrip antenna. The proposed lens antenna is suitable for wireless communications systems.
Highlights
In the recent years, with the development of technology and improvement of the antenna performance requirements, lens antenna becomes more and more attractive to the majority of researchers
In [1], The circular polarization plane luneberg lens antenna for wireless communication of millimeter wave was proposed, the lens antenna is fed by a microstrip antenna
The microstrip antenna was constructed on the substrate ROGERS 5880, the dielectric constant is 2.2, the thickness is 1 mm and the loss tangent is 0.0009
Summary
With the development of technology and improvement of the antenna performance requirements, lens antenna becomes more and more attractive to the majority of researchers. In [1], The circular polarization plane luneberg lens antenna for wireless communication of millimeter wave was proposed, the lens antenna is fed by a microstrip antenna. A luneberg lens multiple-beam scanning antenna for millimeter-wave frequencies was introduced in [2], and the luneberg lens is filled by air, the antenna is fed by a planar antipodal linearly-tapered slot antenna. A two dimensional beam scanning K-band focal-shifted lens antenna was introduced in [4], the lens antenna is fabricated by three dimensional printing, the antenna features twodimensional beamscanability, high gain, and good matching. The lens antennas have been widely used in millimeter-wave frequencies, the low frequency lens antenna has rarely been reported. A high gain lens antenna is reported.
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