US-12620720-B2 - Terahertz band beamforming antenna system

Abstract

Disclosed is a terahertz band beamforming antenna system. A terahertz band beamforming antenna system includes: a metal waveguide top portion; and a metal waveguide bottom portion which is coupled to the metal waveguide top portion, and at which an antenna portion including a feed transmission line and a radiation antenna is positioned, wherein the metal waveguide top portion and the metal waveguide bottom portion may have radiation openings, and may be coupled to seal at least a top surface, a bottom surface, and both side surfaces of the antenna portion.

Inventors

• Moon Il Kim
• Yang Woo KIM
• Yun Kyeong KOH

Assignees

• KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION

Dates

Publication Date

20260505

Application Date

20230718

Priority Date

20220718

Claims (7)

1. 1 . A terahertz band beamforming antenna system, comprising: a metal waveguide top portion; and a metal waveguide bottom portion which is coupled to the metal waveguide top portion, and at which an antenna portion including a feed transmission line and a radiation antenna is positioned, wherein the metal waveguide top portion and the metal waveguide bottom portion are coupled to form a single radiation opening, and are coupled such that the metal waveguide top portion and the metal waveguide bottom portion enclose at least a top surface, a bottom surface, and both side surfaces of the antenna portion.
2. 2 . The terahertz band beamforming antenna system of claim 1 , wherein a plurality of structures in which the metal waveguide top portion and the metal waveguide bottom portion are coupled are laminated.
3. 3 . The terahertz band beamforming antenna system of claim 1 , wherein the antenna portion includes a channel-specific feed transmission line and a radiation antenna, and bottom surfaces, top surfaces, and both side surfaces of the feed transmission line and the radiation antenna of each channel are individually sealed by a metallic material.
4. 4 . The terahertz band beamforming antenna system of claim 1 , wherein the antenna portion is coupled to an IC chip supplying radiation power for each channel by using a bonding wire.
5. 5 . The terahertz band beamforming antenna system of claim 1 , wherein the metal waveguide bottom portion has an input feed network for supplying the radiation power, and the input feed network comprises: an input waveguide; a channel separation unit connected to the input waveguide, and binary dividing each waveguide end in an E-plane direction N times to form a 2 N channel waveguide structure; and an extension waveguide portion extended in the E-plane direction at an end of the 2 N channel waveguide structure.
6. 6 . The terahertz band beamforming antenna system of claim 5 , wherein the antenna portion is positioned in a partial area of the extension waveguide portion.
7. 7 . The terahertz band beamforming antenna system of claim 1 , wherein a cover is formed, which covers a front surface with the radiation opening in the structure in which the metal waveguide top portion and the metal waveguide bottom portion are coupled, and the cover is made of a different material from the metal waveguide.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application claims under 35 U.S.C. § 119 (a) the benefit of Korean Patent Application Nos. 10-2022-0087892 filed on Jul. 18, 2022, and 10-2023-0092350 filed on Jul. 17, 2023, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present invention relates to a terahertz band beamforming antenna system. BACKGROUND ART In the late 2020s, it is expected to utilize a beam-forming system applied with multi-antenna in the terahertz frequency band of 100 GHz or more. To this end, various studies are being preceded to implement multiple antennas. As the next-generation terahertz band beam-forming system structure, UCSB proposes radio wave radiation through a 1-D array antenna on a plane. However, this has a problem in that beam forming in up and down directions is possible, but beam direction control in left and right directions is impossible. SUMMARY OF THE DISCLOSURE Problems to be Solved In order to solve the above problem of the related art, the present invention provides a terahertz band beamforming antenna system. In addition, the present invention is to provide a terahertz band beamforming antenna system which may remove transmission loss by sealing a PCB antenna with a metal waveguide. In addition, the present invention is to provide a terahertz band beamforming antenna system which is capable of manufacturing a terahertz band 2D beamforming array antenna by laminating a special waveguide sealing. Means to Solve the Problems In order to achieve the above objects, according to an aspect of the present invention, disclosed is a terahertz band beamforming antenna system. According to an embodiment of the present invention, a terahertz band beamforming antenna system includes: a metal waveguide top portion; and a metal waveguide bottom portion which is coupled to the metal waveguide top portion, and at which an antenna portion including a feed transmission line and a radiation antenna is positioned, wherein the metal waveguide top portion and the metal waveguide bottom portion may have radiation openings, and may be coupled to seal at least a top surface, a bottom surface, and both side surfaces of the antenna portion. A plurality of structures in which the meal waveguide top portion and the metal waveguide bottom portion are coupled may be laminated. The antenna portion may include a channel-specific feed transmission line and a radiation antenna, and bottom surfaces, top surfaces, and both side surfaces of the feed transmission line and the radiation antenna of each channel may be individually sealed by a metallic material. The antenna portion may be coupled to an IC chip supplying radiation power for each channel by using a bonding wire. The metal waveguide bottom portion may have an input feed network instead of the IC chip for supplying the radiation power, and the input feed network may include an input waveguide; a channel separation unit connected to the input waveguide, and binary dividing each waveguide end in an E-plane direction N times to form a 2N channel waveguide structure, and an extension waveguide portion extended in the E-plane direction at an end of the 2N channel waveguide structure. The antenna portion may be positioned in a partial area of the extension waveguide portion. A cover may be formed, which covers a front surface with the radiation opening in the structure in which the metal waveguide top portion and the metal waveguide bottom portion are coupled, and the cover should be made of a low-loss dielectric material. Advantageous Effects According to an embodiment of the present invention, by providing a terahertz band beamforming antenna system, antenna feed line loss performance can be improved by sealing a PCB antenna with a metal waveguide. Further, according to the present invention, a terahertz band 2D beamforming array antenna can be manufactured by laminating a special waveguide sealing an antenna. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a terahertz band beamforming antenna system according to an embodiment of the present invention. FIG. 2 is a diagram illustrating an internal structure of a metal bottom waveguide according to an embodiment of the present invention. FIG. 3 is a top view of a metal waveguide in which a single antenna is positioned according to an embodiment of the present invention. FIG. 4 is a side view of FIG. 3. FIG. 5 is a front view of FIG. 3. FIG. 6 is a diagram showing a result of simulating transmission loss of a single antenna system of FIG. 3. FIG. 7 is a diagram showing a terahertz band beamforming antenna system according to another embodiment of the present invention. FIG. 8 is a diagram showing a terahertz band beamforming antenna system according to yet another embodiment of the present invention. FIG. 9 is a diagram showing a result of simulating transmission loss of an array antenna system of FIGS. 7 and 8. FIG. 10 is a diagram showing a metal bot