English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In this paper, a novel dielectric resonator antenna (DRA) characterized by a compact size and wide bandwidth is proposed. The achievement of wideband performance involves the introduction of a metallic ring structure inside the dielectric resonato, ensuring that the antenna&#x2019;s volume remains compact. Fundamental and higher-order modes, TM01&#x03B4;, TM021+&#x03B4; of the cylinder DRA are first investigated by using E-field distribution analysis, and it is found that these two modes are hard to resonate in proximity to each other. Therefore, a thin metal ring, acting as a perturbation structure is inserted into the DR to perturb the E-field of the higher-order mode and reduce its resonant frequency. Consequently, the resonant frequency of the TM021+&#x03B4; mode is significantly decreased, with only a slight effect on the TM01&#x03B4; mode. The resonant frequencies of the three resonances, i.e., TM01&#x03B4;, TM021+&#x03B4; and probe-mode, are moved in proximity to achieve a wide impedance bandwidth. For experimental validation, a prototype is fabricated and tested. The measured results show the proposed antenna achieves a bandwidth of 51.1% with a low profile of 0.156&#x03BB;c, where &#x03BB;c represents the wavelength at the center frequency. With these advantages, the proposed design is well-suited for mounting on vehicle platforms, particularly for 4G (2.6 GHz) and 5G (3.5 GHz) communications.

Compact Dielectric Resonator Antenna With Improved Bandwidth via Loading of Metal Ring