<p>The present study presents a differential traveling wave series-fed dielectric resonator antenna (DRA) array with dual circularly polarized (DCP) operating for IEEE 802.11a applications. To possess circular polarization (CP) fields, a unique antenna element composed of rectangular dielectric resonators (RDR) coupled with octagonal slots (OS) at the ground plane and excited by the mean of a microstrip feed at the front plane is proposed. The proposed resonating element generates two orthogonal modes, <InlineEquation ID="IEq1"> <EquationSource Format="TEX">$TE_{\delta 2 1}^{x}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>T</mi> <msubsup> <mi>E</mi> <mrow> <mi>δ</mi> <mn>21</mn> </mrow> <mi>x</mi> </msubsup> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq2"> <EquationSource Format="TEX">$TE_{\ 1 \delta 1}^{y}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>T</mi> <msubsup> <mi>E</mi> <mrow> <mspace width="4pt" /> <mn>1</mn> <mi>δ</mi> <mn>1</mn> </mrow> <mi>y</mi> </msubsup> </mrow> </math></EquationSource> </InlineEquation>, ensuring the existence of CP performance. To obtain a DCP performance, the proposed resonator is utilized for portraying a seven-element array employing a concentric ring fed with dual differential port excitation. The concentric ring fed allows choosing the direction of the input wave and, accordingly, the orientation of the CP. Hence, synchronous feeding to both ports yields in generating waves of various polarization states. The <InlineEquation ID="IEq3"> <EquationSource Format="TEX">$50 \times 50$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>50</mn> <mo>×</mo> <mn>50</mn> </mrow> </math></EquationSource> </InlineEquation> mm<InlineEquation ID="IEq4"> <EquationSource Format="TEX">$^2$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>2</mn> </mmultiscripts> </math></EquationSource> </InlineEquation> array exhibits an resonance bandwidth of 12.15% with an polarization purity of 12.5%. Meanwhile, the inter-port isolation varies from -18 dB to -39 dB along the resonance band. The realized measured gain ranges from 11.33 to 12.44 dBi. The proposed array exhibits DCP capability, and therefore, it fits for various applications.</p>

Miniaturized differential dual circularly polarized traveling wave dielectric resonator antenna array with high ports isolation

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2026年7月29日

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Yazeed Qasaymeh,
Mohammad Alibakhshikenari,
Omar Alharbi,
Jaume Anguera,
Isabelle Huynen,
Iyad Dayoub,
Takfarinas Saber,
Ernesto Limiti,
Abdullah Almuhaisen

摘要

The present study presents a differential traveling wave series-fed dielectric resonator antenna (DRA) array with dual circularly polarized (DCP) operating for IEEE 802.11a applications. To possess circular polarization (CP) fields, a unique antenna element composed of rectangular dielectric resonators (RDR) coupled with octagonal slots (OS) at the ground plane and excited by the mean of a microstrip feed at the front plane is proposed. The proposed resonating element generates two orthogonal modes, $TE_{\delta 2 1}^{x}$ $T E_{δ 21}^{x}$ and $TE_{\ 1 \delta 1}^{y}$ $T E_{1 δ 1}^{y}$ , ensuring the existence of CP performance. To obtain a DCP performance, the proposed resonator is utilized for portraying a seven-element array employing a concentric ring fed with dual differential port excitation. The concentric ring fed allows choosing the direction of the input wave and, accordingly, the orientation of the CP. Hence, synchronous feeding to both ports yields in generating waves of various polarization states. The $50 \times 50$ $50 \times 50$ mm $^2$ $^{2}$ array exhibits an resonance bandwidth of 12.15% with an polarization purity of 12.5%. Meanwhile, the inter-port isolation varies from -18 dB to -39 dB along the resonance band. The realized measured gain ranges from 11.33 to 12.44 dBi. The proposed array exhibits DCP capability, and therefore, it fits for various applications.