Compact Clock-Shaped Broadband Circularly Polarized Antenna Based on Characteristic Mode Analysis
This paper presents the design process of a clock-shaped broadband circular polarized (CP) antenna based on Characteristic Mode Analysis (CMA). It is composed of a circular ring, two microstrip lines approximately perpendicular to each other, and 50-Ω improved coplanar waveguide (CPW). Th...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2019-01-01
|
| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8890786/ |
| _version_ | 1819174218960470016 |
|---|---|
| author | Min Han Wenbin Dou |
| author_facet | Min Han Wenbin Dou |
| author_sort | Min Han |
| collection | DOAJ |
| description | This paper presents the design process of a clock-shaped broadband circular polarized (CP) antenna based on Characteristic Mode Analysis (CMA). It is composed of a circular ring, two microstrip lines approximately perpendicular to each other, and 50-Ω improved coplanar waveguide (CPW). The two microstrip lines are introduced in the X and Y directions, respectively, to break the symmetry for CP operation. Different from the conventional method in which the operation is verified by the simulated surface current distribution, CMA provides physical insight into different modes of the antenna and reveals the mechanism of radiating CP wave. Mode currents and characteristic fields of the selected modes are studied for AR bandwidth enhancement. An improved double-sided printed CPW is introduced to excite the desired modes and achieve wideband impedance matching. To validate the proposed concept, a prototype with a compact size of 0.29λ<sub>L</sub> × 0.29λ<sub>L</sub> × 0.013λ<sub>L</sub> (λ<sub>L</sub> corresponding to the maximum operation frequency) is fabricated and measured. The measured -10 dB impedance bandwidth and 3 dB AR bandwidth are 84.6% from 2.38 GHz to 5.8 GHz and 43.4% from 2.4 GHz to 3.73 GHz, respectively. The overlapping operating bandwidth can cover the ISM band, the TD-LTE band, and the WiMAX band. Besides, the proposed antenna has a stable radiation pattern over the operating band. |
| first_indexed | 2024-12-22T20:35:29Z |
| format | Article |
| id | doaj.art-1a30a4f81d994dc1808e246762788610 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-22T20:35:29Z |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-1a30a4f81d994dc1808e2467627886102022-12-21T18:13:28ZengIEEEIEEE Access2169-35362019-01-01715995215995910.1109/ACCESS.2019.29513718890786Compact Clock-Shaped Broadband Circularly Polarized Antenna Based on Characteristic Mode AnalysisMin Han0https://orcid.org/0000-0003-1507-3985Wenbin Dou1https://orcid.org/0000-0001-7850-9470State Key Laboratory of Millimeter Waves, Southeast University, Nanjing, ChinaState Key Laboratory of Millimeter Waves, Southeast University, Nanjing, ChinaThis paper presents the design process of a clock-shaped broadband circular polarized (CP) antenna based on Characteristic Mode Analysis (CMA). It is composed of a circular ring, two microstrip lines approximately perpendicular to each other, and 50-Ω improved coplanar waveguide (CPW). The two microstrip lines are introduced in the X and Y directions, respectively, to break the symmetry for CP operation. Different from the conventional method in which the operation is verified by the simulated surface current distribution, CMA provides physical insight into different modes of the antenna and reveals the mechanism of radiating CP wave. Mode currents and characteristic fields of the selected modes are studied for AR bandwidth enhancement. An improved double-sided printed CPW is introduced to excite the desired modes and achieve wideband impedance matching. To validate the proposed concept, a prototype with a compact size of 0.29λ<sub>L</sub> × 0.29λ<sub>L</sub> × 0.013λ<sub>L</sub> (λ<sub>L</sub> corresponding to the maximum operation frequency) is fabricated and measured. The measured -10 dB impedance bandwidth and 3 dB AR bandwidth are 84.6% from 2.38 GHz to 5.8 GHz and 43.4% from 2.4 GHz to 3.73 GHz, respectively. The overlapping operating bandwidth can cover the ISM band, the TD-LTE band, and the WiMAX band. Besides, the proposed antenna has a stable radiation pattern over the operating band.https://ieeexplore.ieee.org/document/8890786/Broadband antennascharacteristic mode analysis (CMA)circular polarization (CP)co-planar waveguide (CPW) |
| spellingShingle | Min Han Wenbin Dou Compact Clock-Shaped Broadband Circularly Polarized Antenna Based on Characteristic Mode Analysis IEEE Access Broadband antennas characteristic mode analysis (CMA) circular polarization (CP) co-planar waveguide (CPW) |
| title | Compact Clock-Shaped Broadband Circularly Polarized Antenna Based on Characteristic Mode Analysis |
| title_full | Compact Clock-Shaped Broadband Circularly Polarized Antenna Based on Characteristic Mode Analysis |
| title_fullStr | Compact Clock-Shaped Broadband Circularly Polarized Antenna Based on Characteristic Mode Analysis |
| title_full_unstemmed | Compact Clock-Shaped Broadband Circularly Polarized Antenna Based on Characteristic Mode Analysis |
| title_short | Compact Clock-Shaped Broadband Circularly Polarized Antenna Based on Characteristic Mode Analysis |
| title_sort | compact clock shaped broadband circularly polarized antenna based on characteristic mode analysis |
| topic | Broadband antennas characteristic mode analysis (CMA) circular polarization (CP) co-planar waveguide (CPW) |
| url | https://ieeexplore.ieee.org/document/8890786/ |
| work_keys_str_mv | AT minhan compactclockshapedbroadbandcircularlypolarizedantennabasedoncharacteristicmodeanalysis AT wenbindou compactclockshapedbroadbandcircularlypolarizedantennabasedoncharacteristicmodeanalysis |