Transmission line for radiofrequency range current

Patent metadata

Field	Value
Publication number	US-11923587-B2
Application number	US-201917433916-A
Country	US
Kind code	B2
Filing date	Feb 25, 2019
Priority date	Feb 25, 2019
Publication date	Mar 5, 2024
Grant date	Mar 5, 2024

Abstract

A transmission line for transmitting radiofrequency range current between a first conductive element and a second conductive element, the transmission line comprising a signal current line and at least one return current line, the signal current line and the return current line(s) extending in parallel. Each current line comprises at least one first segment and at least one second segment. Each first segment is partially aligned with at least one adjacent second segment, aligned segments being separated by a first dielectric gap, and each aligned first segment and second segment forming a capacitive coupling across the first dielectric gap. This solution enables a transmission line which provides only small capacitive loading onto its surroundings, and which therefore can extend, e.g., through an antenna element without significantly affecting the performance of the antenna element.

First claim

What is claimed is:

1. An electronic device comprising:
a first conductive element and a second conductive element separated by a non-conductive volume;
a first antenna and a second antenna configured at least partially within the non-conductive volume and/or the second conductive element;
a first transmission line connecting the first conductive element to the first antenna across the non-conductive volume; and
a second transmission line connecting the first conductive element to the second antenna across the non-conductive volume, wherein the second transmission line comprises:
a signal current line; and
at least one return current line;

wherein the signal current line and the return current line(s) extend in parallel;
wherein each of the signal current line and the return current line(s) comprises at least one first segment and at least one second segment, wherein each first segment is partially aligned with at least one adjacent second segment;
wherein a respective first segment and a respective second segment are separated by a first dielectric gap and form a capacitive coupling across the first dielectric gap.

2. The electronic device according to claim 1 , wherein the first segment(s) and the second segment(s) are arranged in a first plane, wherein each first segment partially overlaps with at least one adjacent second segment, and wherein two segments which are aligned and overlapping are separated by the first dielectric gap in a first direction within the first plane.

3. The electronic device according to claim 2 , wherein each overlap between a respective first segment and a respective second segment generates an electromagnetic coupling enabling transmission above 10 GHz frequencies, and wherein electromagnetic isolation is provided between the respective first segment and the respective second segment below 10 GHz frequencies.

4. The electronic device according to claim 1 , wherein each first segment and each second segment has a longitudinal extension of λ/16 to 3*λ/4, wherein λ is a wavelength within the radiofrequency range.

5. The electronic device according to claim 2 , wherein the first segment(s) further extend in a second plane and the second segment(s) further extend in a third plane, wherein the second plane is parallel with the third plane, and wherein the second plane and the third plane are perpendicular to the first plane.

6. The electronic device according to claim 5 , wherein each first segment is separated from an adjacent first segment by a second dielectric gap in a first direction within the second plane, and each second segment is separated from an adjacent second segment by a second dielectric gap in a first direction within the third plane.

7. The electronic device according to claim 5 , wherein the first segment(s) of the signal current line and the first segment(s) of the return current line(s) extend in parallel in the second plane, and the second segment(s) of the signal current line and the second segment(s) of the return current line(s) extend in parallel in the third plane.

8. The electronic device according to claim 1 , wherein the second transmission line has only one signal current line and one return current line.

9. The electronic device according to claim 2 , wherein each of the signal current line and the return current line(s) has only one first segment and one second segment, wherein the respective first segment is additionally separated from the respective second segment by a third dielectric gap in a second direction within the first plane, and wherein the second direction is perpendicular to the first direction.

10. The electronic device according to claim 1 , wherein the second transmission line comprises one signal current line and two return current lines, wherein the signal current line extends between the two return current lines.

11. The electronic device according to claim 1 , wherein the signal current line and the return current line(s) are connected by the first conductive element and the second conductive element, wherein a transmission line gap extends between the first conductive element and the second conductive element, wherein the transmission line gap divides the second transmission line into a first transmission line part and a second transmission line part, and wherein the first conductive element and the second conductive element form an inductive coupling between the first transmission line part and the second transmission line part.

12. The electronic device according to claim 1 , further comprising:
a display;
wherein the first conductive element is a device chassis or a printed circuit board;
wherein the second conductive element is a metal frame;
wherein the display and the metal frame at least partially surround the device chassis and the printed circuit board; and
wherein radiofrequency radiation generated by the first antenna and the second antenna is transmitted through a dielectric gap separating the display and the metal frame.

13. The electronic device according to claim 1 , wherein the first antenna is a sub-6-GHz antenna.

14. The electronic device according to claim 1 , wherein the second antenna is a millimeter-wave antenna, and wherein a millimeter-wave antenna module is arranged between the first conductive element and the second conductive element.

15. The electronic device according to claim 1 , wherein the first antenna and the second antenna are configured at least partially within the second conductive element.

Assignees

• Huawei Tech Co Ltd

Inventors

• Khripkov Alexander
• Viikari Ville
• Montoya Moreno Resti
• Ala-Laurinaho Juha
• Ilvonen Janne
• Van Wonterghem Jari Kristian

Classifications

• H01P1/20363 Primary

  Linear resonators · CPC title

• H01Q1/243

  with built-in antennas · CPC title

• H01Q1/521

  reducing the coupling between adjacent antennas · CPC title

• H01Q5/307

  Individual or coupled radiating elements, each element being fed in an unspecified way · CPC title

• H01Q21/28

  Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} · CPC title