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A novel mm-wave phased array antenna for whole metal covered 5G mobile handset is proposed. The proposed array antenna consists of eight rotated slot antenna elements that are arranged on the upper frame of the metal-body. The proposed array demonstrates good S-parameter characteristics in frequency band ranging from 27.1 to 28.6 GHz and mutual-coupling between antenna elements is less than −19 dB...
Mobile communication service is widely penetrating to all the society as the key infrastructure. It is spreading beyond the conventional telephone service. Wide variety of social services including e-commerce, e-bank, navigation, location, healthcare, and education are offered on the network. It's not too much to say that people can never part with a smartphone as the most frequently use interface...
In the 5G system, high frequency bands over 6 GHz (6–100 GHz) will be a key factor in providing a very wide bandwidth. Because of high path losses, these bands are considered to use for small cells. To design radio links with high accuracy and evaluate 5G system performances for various scenarios, channel characteristics must be clarified. In this paper, we clarify channel characteristics in an outdoor...
This paper presents a dual-band design of reflectarray antenna by using metallic elements for high energy efficiency at 28 and 60GHz bands. The dual-band operation is created by considering the frequency bands below and above the cutoff frequency of metallic waveguides. This frequency band separation differentiates the waveguide's characteristics as a resonant and non-resonant reflecting elements,...
A flat and low profile, wideband and high gain Substrate Integrated Waveguide (SIW) Transmission Line (TL) Butler Matrix (BM) beamforming network (BFN) for beamforming and beam-steering applications at 28 GHz (5G) is presented in this paper. Four distinct beams steering between −35° to 35° with sidelobe and return-loss level below −10 dB are generated by connecting the proposed BFN to microstrip antennas...
The next generation of wireless communications is the horizon, and the telecoms world is waiting to see exactly at which frequencies 5G will be implemented. Despite some unknowns and technological challenges, it is increasingly becoming clear that the millimeter-wave will be a key enabler for 5G by allocating more bandwidth to deliver faster, higher-quality video, and multimedia content and services...
An experimental validation for millimeter-wave (mm-wave) channel measurement is presented in a reverberation chamber (RC) at 28 GHz band. A 28 GHz channel sounder and a vector network analyzer were used to measure complex channel transfer functions at the specific position of the rotating mode-stirrer in the RC. To demonstrate the experimental validation according to different antenna directions and...
This paper presents a circularly polarized reflectarray with linearly polarized feed operating at 28GHz for 5G applications. The proposed reflectarray is composed of a flat reflecting surface populated with numerous two-layer ground-backed non-resonant subwavelength rectangular patch elements which are in staggered arrangement and a Vivaldi antenna as the linearly feeder. Simulated results demonstrated...
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