Abstract
This communication presents a novel design of a differentially fed wideband circularly polarized (CP) slot antenna. The CP antenna consists of two opposite-fed C-shaped radiating patches and a stub-loaded corner-truncated rectangular slot. With the slot designed to be antisymmetric with respect to the bisection plane and oppositely fed by two microstrip lines, good differential-mode (DM) performance was obtained. On the other hand, the radiations contributed by the corresponding parts of the antisymmetric CP antenna will be destructive when in common-mode (CM) operation. This results in high CM suppression without a preceding CM-rejection bandpass filter. Also, low DM axial ratios (ARs) were achieved by tuning the truncated corner length, the protruded stub length, and the coupling length and gap of the C-shaped radiating patches. The measurement shows that the designed CP antenna has a wide 10 dB DM impedance band of 5-6.49 GHz and a 3 dB DM AR band of 4.94-6.03 GHz, corresponding to a CP fractional bandwidth of 18.7%. Also, in 4.5-6.5 GHz, the proposed antenna can effectively reject CM input signals because the measured CM return loss is smaller than 2.91 dB, and can convert only very little DM input power into CM reflected power since the DM-to-CM conversion is less than -50 dB.
| Original language | English |
|---|---|
| Article number | 8585140 |
| Pages (from-to) | 1941-1945 |
| Number of pages | 5 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 67 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2019 Mar 1 |
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All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering
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Differentially Fed Wideband Circularly Polarized Slot Antenna. / Chen, Wen Jie; Chen, Hsun-Hsiang; Lee, Ching-Her; Hsu, Chung I.G.
In: IEEE Transactions on Antennas and Propagation, Vol. 67, No. 3, 8585140, 01.03.2019, p. 1941-1945.Research output: Contribution to journal › Article
TY - JOUR
T1 - Differentially Fed Wideband Circularly Polarized Slot Antenna
AU - Chen, Wen Jie
AU - Chen, Hsun-Hsiang
AU - Lee, Ching-Her
AU - Hsu, Chung I.G.
PY - 2019/3/1
Y1 - 2019/3/1
N2 - This communication presents a novel design of a differentially fed wideband circularly polarized (CP) slot antenna. The CP antenna consists of two opposite-fed C-shaped radiating patches and a stub-loaded corner-truncated rectangular slot. With the slot designed to be antisymmetric with respect to the bisection plane and oppositely fed by two microstrip lines, good differential-mode (DM) performance was obtained. On the other hand, the radiations contributed by the corresponding parts of the antisymmetric CP antenna will be destructive when in common-mode (CM) operation. This results in high CM suppression without a preceding CM-rejection bandpass filter. Also, low DM axial ratios (ARs) were achieved by tuning the truncated corner length, the protruded stub length, and the coupling length and gap of the C-shaped radiating patches. The measurement shows that the designed CP antenna has a wide 10 dB DM impedance band of 5-6.49 GHz and a 3 dB DM AR band of 4.94-6.03 GHz, corresponding to a CP fractional bandwidth of 18.7%. Also, in 4.5-6.5 GHz, the proposed antenna can effectively reject CM input signals because the measured CM return loss is smaller than 2.91 dB, and can convert only very little DM input power into CM reflected power since the DM-to-CM conversion is less than -50 dB.
AB - This communication presents a novel design of a differentially fed wideband circularly polarized (CP) slot antenna. The CP antenna consists of two opposite-fed C-shaped radiating patches and a stub-loaded corner-truncated rectangular slot. With the slot designed to be antisymmetric with respect to the bisection plane and oppositely fed by two microstrip lines, good differential-mode (DM) performance was obtained. On the other hand, the radiations contributed by the corresponding parts of the antisymmetric CP antenna will be destructive when in common-mode (CM) operation. This results in high CM suppression without a preceding CM-rejection bandpass filter. Also, low DM axial ratios (ARs) were achieved by tuning the truncated corner length, the protruded stub length, and the coupling length and gap of the C-shaped radiating patches. The measurement shows that the designed CP antenna has a wide 10 dB DM impedance band of 5-6.49 GHz and a 3 dB DM AR band of 4.94-6.03 GHz, corresponding to a CP fractional bandwidth of 18.7%. Also, in 4.5-6.5 GHz, the proposed antenna can effectively reject CM input signals because the measured CM return loss is smaller than 2.91 dB, and can convert only very little DM input power into CM reflected power since the DM-to-CM conversion is less than -50 dB.
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U2 - 10.1109/TAP.2018.2889162
DO - 10.1109/TAP.2018.2889162
M3 - Article
VL - 67
SP - 1941
EP - 1945
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
SN - 0018-926X
IS - 3
M1 - 8585140
ER -