Abstract
This article presents a new design of a common-mode suppressed differentially fed circularly polarized (CP) antenna using a quasi-self-complementary (QSC) structure. The antenna radiating element consists of a semicircular-ring radiating patch and its complementary radiating slot counterpart. The design idea for producing CP radiation is based on field orthogonality of the QSC structure. For better impedance matching, a fan-shaped notch (stub) around the feeding position was cut from (implemented in) the semicircular radiating patch (slot). In addition, to improve the axial ratio, a QSC semielliptical structure is embedded in the central area of the antenna. For the designed differentially fed CP antenna, measurement shows that the differential-mode (DM) operating band with return loss >10 dB covers 4.76-6.38 GHz. The measured DM 3-dB axial-ratio band is 4.95-5.43 GHz. Also, very good common-mode (CM) suppression is observed with the measured CM reflection coefficient >−1.21 dB in 4.50-6.5 GHz.
| Original language | English |
|---|---|
| Pages (from-to) | 741-746 |
| Number of pages | 6 |
| Journal | Microwave and Optical Technology Letters |
| Volume | 61 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2019 Mar 1 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
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Differentially fed CP antenna with quasi-self-complementary semicircular-ring structure. / Lee, Ching-Her; Hong, Wanchu; Chen, Wen Jie; Hsu, Chung I.G.
In: Microwave and Optical Technology Letters, Vol. 61, No. 3, 01.03.2019, p. 741-746.Research output: Contribution to journal › Article
TY - JOUR
T1 - Differentially fed CP antenna with quasi-self-complementary semicircular-ring structure
AU - Lee, Ching-Her
AU - Hong, Wanchu
AU - Chen, Wen Jie
AU - Hsu, Chung I.G.
PY - 2019/3/1
Y1 - 2019/3/1
N2 - This article presents a new design of a common-mode suppressed differentially fed circularly polarized (CP) antenna using a quasi-self-complementary (QSC) structure. The antenna radiating element consists of a semicircular-ring radiating patch and its complementary radiating slot counterpart. The design idea for producing CP radiation is based on field orthogonality of the QSC structure. For better impedance matching, a fan-shaped notch (stub) around the feeding position was cut from (implemented in) the semicircular radiating patch (slot). In addition, to improve the axial ratio, a QSC semielliptical structure is embedded in the central area of the antenna. For the designed differentially fed CP antenna, measurement shows that the differential-mode (DM) operating band with return loss >10 dB covers 4.76-6.38 GHz. The measured DM 3-dB axial-ratio band is 4.95-5.43 GHz. Also, very good common-mode (CM) suppression is observed with the measured CM reflection coefficient >−1.21 dB in 4.50-6.5 GHz.
AB - This article presents a new design of a common-mode suppressed differentially fed circularly polarized (CP) antenna using a quasi-self-complementary (QSC) structure. The antenna radiating element consists of a semicircular-ring radiating patch and its complementary radiating slot counterpart. The design idea for producing CP radiation is based on field orthogonality of the QSC structure. For better impedance matching, a fan-shaped notch (stub) around the feeding position was cut from (implemented in) the semicircular radiating patch (slot). In addition, to improve the axial ratio, a QSC semielliptical structure is embedded in the central area of the antenna. For the designed differentially fed CP antenna, measurement shows that the differential-mode (DM) operating band with return loss >10 dB covers 4.76-6.38 GHz. The measured DM 3-dB axial-ratio band is 4.95-5.43 GHz. Also, very good common-mode (CM) suppression is observed with the measured CM reflection coefficient >−1.21 dB in 4.50-6.5 GHz.
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U2 - 10.1002/mop.31635
DO - 10.1002/mop.31635
M3 - Article
VL - 61
SP - 741
EP - 746
JO - Microwave and Optical Technology Letters
JF - Microwave and Optical Technology Letters
SN - 0895-2477
IS - 3
ER -