Abstract
A cavity-backed angled-dipole antenna is proposed for millimeter-wave wireless applications. The angled-dipole radiator is built on both sides of an RT/Duroid 5880 substrate (εr=2.2) and fed by a parallel-plate transmission line. The cavity-backed reflector is utilized to improve the radiation characteristics of the angled dipole, such as gain, back-radiation, symmetric pattern, and similar 3 dB beamwidth in theE- andH-planes. The design, with a cavity aperture of0.5λ28-GHz×0.5λ28-GHz, results in aS11<-10 dB bandwidth of 26.7–30.6 GHz, a gain of 6.6–8.0 dB, and a similar 3 dB beamwidth of approximately 70° for both theE- andH-planes. Eight-element linear arrays with the proposed antenna having a center-to-center spacing of 5.6 mm(0.52λ28-GHz)are characterized, fabricated, and measured. By applying nonuniform power distribution across excitations, the array achieves a scan angle up to 40° and a sidelobe level below −15 dB.
Highlights
The fourth-generation (4G) long-term evolution (LTE) mobile communication technology has been successfully implemented in many parts of the world
Millimeter-wave wireless cellular communication can offer more than an order of magnitude increase in capacity over current state-of-the-art 4G cellular networks [2]
A composite cavity-backed angled-dipole antenna [11] and its arrays are developed for the millimeterwave band wireless applications, especially the antenna sectors in the 5G wireless cellular communication systems
Summary
The fourth-generation (4G) long-term evolution (LTE) mobile communication technology has been successfully implemented in many parts of the world. Millimeter-wave wireless cellular communication can offer more than an order of magnitude increase in capacity over current state-of-the-art 4G cellular networks [2] To achieve these gains, millimeter-wave cellular systems require highly directional and adaptive transmitters as well as directional isolation between links. Millimeter-wave cellular systems require highly directional and adaptive transmitters as well as directional isolation between links To address these challenges, beamforming has been proposed as an enabling technology [3, 4] for 5G wireless cellular communication. A composite cavity-backed angled-dipole antenna [11] and its arrays are developed for the millimeterwave band wireless applications, especially the antenna sectors in the 5G wireless cellular communication systems. The cavity is used to improve the radiation characteristics of the angled-dipole in terms of gain, symmetric pattern, and similar beamwidth in the E- and H-planes. Scanning performances of the arrays are first examined using the CST Microwave Studio and confirmed by experimental tests of several fixed-scan angle arrays
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