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Radiation: Applications

Radiation: Applications

The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
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Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation

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A Novel Low-Cost Compact High-Performance Flower-Shaped Radiator Design for Modern Smartphone Applications.

Zaheer Ahmed Dayo¹, Muhammad Aamir¹, Ziaur Rahman¹

¹College of Computer Science, Huanggang Normal University (HGNU), Huanggang 438000, China.

|February 25, 2023

Summary

This summary is machine-generated.

A miniaturized flower-shaped radiator (FSR) antenna was developed for 5G mobile communications. This high-performance antenna offers wide bandwidth and high gain, making it ideal for smartphones.

Keywords:

compact flower-shaped radiator (FSR)high-performance low-cost modern smartphone wireless applications

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Area of Science:

Electromagnetics and Antenna Design
Wireless Communication Engineering

Background:

Miniaturized antennas are crucial for modern mobile devices, especially with the increasing demand for higher data rates in 5G networks.
Existing antenna designs often face trade-offs between size, bandwidth, and performance, necessitating innovative solutions for sub-6 GHz applications.

Purpose of the Study:

To design, simulate, and validate a novel miniaturized high-performance flower-shaped radiator (FSR) antenna.
To achieve wide bandwidth, high gain, and efficient radiation for 5G smartphone connectivity in the sub-6 GHz spectrum.

Main Methods:

Developed an FSR antenna prototype using an ultracompact square metallic patch, microstrip feed network, and partial ground plane.
Employed open circuit loaded stubs (rectangular, triangular, circular) to optimize antenna performance.
Fabricated the antenna on a low-cost F4B laminate substrate and conducted extensive parameter studies and simulations.

Main Results:

Achieved a wide impedance bandwidth of 5.33 GHz (3.67–9.0 GHz) with 83.6% fractional bandwidth.
Obtained a maximum gain of 7.3 dBi and optimal radiation efficiency of 89%.
Demonstrated stable monopole-like radiation patterns and strong current flow, with good agreement between simulated and measured results.

Conclusions:

The proposed miniaturized FSR antenna meets the demanding performance requirements for 5G mobile communication applications.
Its compact size, wide bandwidth, and high efficiency make it a suitable candidate for integration into modern smartphones.
The design methodology and validation provide a valuable reference for future antenna development in sub-6 GHz frequency bands.