1. Paper review
Yun-tae Park
Antennas & RF Devices Lab.

2. Contents
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications
- IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 16, 2017
Antennas & RF Devices Lab.

3. Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications
In this letter, we propose a broadband printed-dipole antenna
for use in 5G applications.
Figure 1. (a) Geometry of the printed-dipole antenna and
(b) a photograph of the fabricated sample including aluminum
jig and SMA connector.
Figure 2. The simulation and measurement results of the single element :
(a) 𝑆 11 and gain values; (b) normalized 32-GHz radiation pattern.
Antennas & RF Devices Lab.

4. Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications
To obtain a low mutual coupling for close spacing, we inserted a microstrip stub between the two printed-dipole antennas with a 4.8-mm center-to-center spacing ( λ at GHz).
Figure 3. (a) Geometry of the two printed-dipole antenna with a stub and a
center-to-center of 4.8 mm and (b) simulated mutual coupling ( 𝑆 21 )
for different lengths of the stub ( 𝐿 𝑛 ).
Figure 4. (a) Geometry of an 8-element linear array with the proposed antenna,
a center-to-center spacing of 4.8 mm, and stubs. Scanning performance
in E-plane of the array (b) without and (c) with stubs at 28 and 32 GHz.
Antennas & RF Devices Lab.

5. Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications
Figure 5. (a) Fabricated sample of the 8-element array with 0°-
scanning and its results: (b) 𝑆 11 and gain values;
(c) normalized 32-GHz radiation pattern.
Figure 6. (a) Fabricated sample of the 8-element array with
fixed scanning; its (b) 𝑆 11 values and (c) E-plane
radiation patterns at 28 and 32 GHz.
Antennas & RF Devices Lab.

6. VS Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications VS
Conventional printed-dipole
Angled printed-dipole
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7. Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications
Conventional printed-dipole
𝑺 𝟏𝟏
Angled printed-dipole
𝑺 𝟏𝟏
Conventional printed-dipole
𝑮𝒂𝒊𝒏 𝒑𝒍𝒐𝒕
Angled printed-dipole
𝑮𝒂𝒊𝒏 𝒑𝒍𝒐𝒕
Antennas & RF Devices Lab.

8. Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications
TABLE I. Comparison single elements at 28GHz.
28 GHz
10 dB Bandwidth
25.53 ~ GHz
25.72 ~ GHz
Gain (broadside)
5.81 dBi
5.80 dBi
HPBW
68° (E-plane)
178.1° (H-plane)
69° (E-plane)
178.67° (H-plane)
Antennas & RF Devices Lab.

9. VS Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications
Conventional 8×1 printed-dipole array
Angled 8×1 printed-dipole array VS
Antennas & RF Devices Lab.

10. Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications
Conventional printed-dipole array
Angled printed-dipole array
Simulated 𝑺 𝟐𝟏 of the array antennas.
Antennas & RF Devices Lab.

11. Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications
Conventional printed-dipole
𝑮𝒂𝒊𝒏 𝒑𝒍𝒐𝒕 (𝟎° & 𝟒𝟔° & 𝟔𝟐°)
Angled printed-dipole
𝑮𝒂𝒊𝒏 𝒑𝒍𝒐𝒕(𝟎° & 𝟒𝟔° & 𝟔𝟐°)
Antennas & RF Devices Lab.

12. Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications
TABLE II. Comparison array antennas without stub at 28GHz.
28 GHz
Mutual Coupling ( 𝑆 21 )
< dB
< dB
Gain (broadside)
12.65 dBi
12.63 dBi
HPBW (E-plane)
13°
Scanning Angle
(SLL, Gain)
0° (-12.8 dB, dBi)
46° (-9.58 dB, dBi)
62° (-5.87 dB, 7.81 dBi)
0° (-13.1 dB, dBi)
46° (-9.02 dB, 9.61 dBi)
62° (-6.28dB, 7.29 dBi)
Antennas & RF Devices Lab.

13. VS Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications
Conventional 8×1 printed-dipole array
with stub
Angled 8×1 printed-dipole array
with stub VS
Antennas & RF Devices Lab.

14. Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications
Conventional printed-dipole array with stub
Angled printed-dipole array with stub
Simulated 𝑺 𝟐𝟏 of the array antennas.
Antennas & RF Devices Lab.

15. Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications
w/o stub
w/ stub
w/o stub
w/ stub
Simulated 𝑺 𝟐𝟏 of the conventional printed-dipole array antenna w/ and w/o stub.
Simulated 𝑺 𝟐𝟏 of the angled printed-dipole array antenna w/ and w/o stub.
Antennas & RF Devices Lab.

16. Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications
Conventional printed-dipole with stub
𝑮𝒂𝒊𝒏 𝒑𝒍𝒐𝒕 (𝟎° & 𝟒𝟔° & 𝟔𝟖°)
Angled printed-dipole with stub
𝑮𝒂𝒊𝒏 𝒑𝒍𝒐𝒕(𝟎° & 𝟒𝟒° & 𝟕𝟒°)
Antennas & RF Devices Lab.

17. Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications
TABLE III. Comparison array antennas with stub at 28GHz.
28 GHz
Mutual Coupling ( 𝑆 21 )
< dB
< dB
Gain (broadside)
12.57 dBi
12.52 dBi
HPBW (E-plane)
13°
Scanning Angle
(SLL, Gain)
0° ( dB, dBi)
46° (-8.35 dB, 9.52 dBi)
68° (-7.78 dB, 8.30 dBi)
0° ( dB, dBi)
44° (-9.75 dB, dBi)
74° (-8.86 dB, dBi)
Antennas & RF Devices Lab.

18. Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications VS
Conventional printed-dipole array with and without stub
TABLE IV. Comparison array antennas w/ and w/o stub at 28GHz.
28 GHz
Mutual Coupling ( 𝑆 21 )
< dB
< dB
Gain (broadside)
12.65 dBi
12.57 dBi
HPBW (E-plane)
13°
Scanning Angle
(SLL, Gain)
0° (-12.8 dB, dBi)
46° (-9.58 dB, dBi)
62° (-5.87 dB, 7.81 dBi)
0° ( dB, dBi)
46° (-8.35 dB, 9.52 dBi)
68° (-7.78 dB, 8.30 dBi)
Antennas & RF Devices Lab.

19. Antennas & RF Devices Lab.
Broadband Printed-Dipole Antenna and Its Arrays for 5G Applications VS
Angled printed-dipole array with and without stub
TABLE V. Comparison array antennas w/ and w/o stub at 28GHz.
28 GHz
Mutual Coupling ( 𝑆 21 )
< dB
< dB
Gain (broadside)
12.63 dBi
12.52 dBi
HPBW (E-plane)
13°
Scanning Angle
(SLL, Gain)
0° (-13.1 dB, dBi)
46° (-9.02 dB, 9.61 dBi)
62° (-6.28dB, 7.29 dBi)
0° ( dB, dBi)
44° (-9.75 dB, dBi)
74° (-8.86 dB, dBi)
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20. Thank you for your attention
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