Paper review Yun-tae Park 2018. 08. 29 Antennas & RF Devices Lab.

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

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.

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 (0.42-0.61λ at 26-38 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.

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.

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

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.

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 ~ 34.84 GHz 25.72 ~ 38.84 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.

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.

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.

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.

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 ) < -12.17 dB < -13.18 dB Gain (broadside) 12.65 dBi 12.63 dBi HPBW (E-plane) 13° Scanning Angle (SLL, Gain) 0° (-12.8 dB, 12.65 dBi) 46° (-9.58 dB, 10.71 dBi) 62° (-5.87 dB, 7.81 dBi) 0° (-13.1 dB, 12.63 dBi) 46° (-9.02 dB, 9.61 dBi) 62° (-6.28dB, 7.29 dBi) Antennas & RF Devices Lab.

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.

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.

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.

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.

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 ) < -17.39 dB < -21.25 dB Gain (broadside) 12.57 dBi 12.52 dBi HPBW (E-plane) 13° Scanning Angle (SLL, Gain) 0° (-13.11 dB, 12.57 dBi) 46° (-8.35 dB, 9.52 dBi) 68° (-7.78 dB, 8.30 dBi) 0° (-13.27 dB, 12.52 dBi) 44° (-9.75 dB, 11.67 dBi) 74° (-8.86 dB, 11.01 dBi) Antennas & RF Devices Lab.

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 ) < -12.17 dB < -17.39 dB Gain (broadside) 12.65 dBi 12.57 dBi HPBW (E-plane) 13° Scanning Angle (SLL, Gain) 0° (-12.8 dB, 12.65 dBi) 46° (-9.58 dB, 10.71 dBi) 62° (-5.87 dB, 7.81 dBi) 0° (-13.11 dB, 12.57 dBi) 46° (-8.35 dB, 9.52 dBi) 68° (-7.78 dB, 8.30 dBi) Antennas & RF Devices Lab.

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 ) < -13.18 dB < -21.25 dB Gain (broadside) 12.63 dBi 12.52 dBi HPBW (E-plane) 13° Scanning Angle (SLL, Gain) 0° (-13.1 dB, 12.63 dBi) 46° (-9.02 dB, 9.61 dBi) 62° (-6.28dB, 7.29 dBi) 0° (-13.27 dB, 12.52 dBi) 44° (-9.75 dB, 11.67 dBi) 74° (-8.86 dB, 11.01 dBi) Antennas & RF Devices Lab.

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