Rod Waveguides as Future 5G Antennas for Mobile Devices

Moreno, Resti Montoya; Ala‐Laurinaho, Juha; Viikari, Ville

doi:10.23919/eumc.2018.8541770

Cited by 6 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…to implement dual-polarization is to use a square waveguide with a coaxial connections on the adjacent walls [7]. Since both the coaxial connections are at the same distance from the shorting wall and close to each other, the coupling between the orthogonal feed ports is high, approx.…”

Section: Introductionmentioning

confidence: 99%

Dual-Polarized Probe for Planar Near-Field Measurement

Karki

Ala‐Laurinaho

Viikari

2023

Antennas Wirel. Propag. Lett.

View full text Add to dashboard Cite

A dual-polarized probe enables the simultaneous sampling of two orthogonal polarizations which decreases the time for the characterization of co-and cross-polar properties of the antenna under test in transmission mode by 50%. In this work, a dual-polarized probe comprising of a square waveguide and grating polarizer based orthomode transducer is presented. The Ku-band dual-polarized probe is manufactured in-house using additive manufacturing and coated with conductive paint. The simulated and measured −10-dB impedance bandwidth is between 10.7-14.5 GHz. The peak simulated and measured coupling between the orthogonal polarizations is less than −60 dB and −40 dB, respectively.

show abstract

Section: Introductionmentioning

confidence: 99%

Dual-Polarized Probe for Planar Near-Field Measurement

Karki

Ala‐Laurinaho

Viikari

2023

Antennas Wirel. Propag. Lett.

View full text Add to dashboard Cite

show abstract

“…However, the presented antennas generally have a relatively narrow band, or they operate only with a single polarization. Furthermore, the volume reserved for the millimeter-wave antenna may be relatively large (see, e.g., [22]) or the metal frame, which would heavily impact the performance of the antennas, is not included.…”

Section: Introductionmentioning

confidence: 99%

Dual-Polarized mm-Wave Endfire Chain-Slot Antenna for Mobile Devices

Moreno

Kurvinen

Ala‐Laurinaho

et al. 2021

IEEE Trans. Antennas Propagat.

Self Cite

View full text Add to dashboard Cite

This article describes a dual-polarized end-fire antenna array for millimeter-wave frequencies. The antenna consists of a chain-slot-shaped pattern on a mobile phone metal frame. The antenna is fed using a transmission line, which would cause only a negligible capacitive loading of the sub-6 GHz antenna realized on the same metal frame and, therefore, would not significantly degrade its perfomance. This makes colocating the sub-6 GHz and mm-wave antennas in the same, shared volume possible. Measurements indicate that a 4-element array placed within a mobile phone provides a realized gain between 8 and 12.6 dBi for both polarizations across the entire band from 24.5 to 29.5 GHz. The total efficiency of a single element is better than −2 and −3 dB for the whole band for horizontal and vertical polarizations, respectively.

show abstract

“…Microstrip feed lines [13], [16] are a typical solution. Furthermore, depending on the antenna structure, studies have shown the effectiveness of other solutions, including Butler matrices [26], substrate-integrated-waveguides [27], and coplanar waveguide-to-rectangular metal waveguide transitions on a flexible printed circuit board (PCB) [28].…”

Section: Introductionmentioning

confidence: 99%

Capacitively-Loaded Feed Line to Improve mm-Wave and Sub-6 GHz Antenna Co-Existence

et al. 2020

Self Cite

View full text Add to dashboard Cite

The co-existence of millimeter-wave (mm-wave) and sub-6 GHz antennas in a smartphone presents many performance-limiting aspects. When both antennas are attached to the metal frame, the feed lines of the mm-wave antennas might short-circuit the sub-6 GHz antennas, and thus, may significantly affect their performance. This paper presents a method to design feed lines that function as transmission lines at mm-wave frequencies but correspond to open circuits at sub-6 GHz. This study determines, in theory, the smallest achievable capacitive loading with different line types and experimentally validates the approach. The capacitive loading due to the feed line is small enough to maintain the sub-6 GHz performance. At the mm-wave band, the insertion loss of the line is 1 dB with a measured reflection coefficient below −10 dB. The introduced common-mode capacitive load of the feed line on the sub-6 GHz antennas corresponds to 0.19 pF capacitance.

show abstract

Rod Waveguides as Future 5G Antennas for Mobile Devices

Cited by 6 publications

References 5 publications

Dual-Polarized Probe for Planar Near-Field Measurement

Dual-Polarized Probe for Planar Near-Field Measurement

Dual-Polarized mm-Wave Endfire Chain-Slot Antenna for Mobile Devices

Capacitively-Loaded Feed Line to Improve mm-Wave and Sub-6 GHz Antenna Co-Existence

Contact Info

Product

Resources

About