KR-20260063751-A - System and method for antenna measurement using non-contact RF coupler

Abstract

An antenna measurement system using a non-contact RF coupler according to one embodiment of the present invention comprises: a first RF coupler that transmits an RF signal input from an RF input terminal to a ground line; and a second RF coupler that is non-contactually coupled to the first RF coupler, couples and acquires an RF signal transmitted to the first RF coupler, and transmits the acquired RF signal to an antenna for transmitting an RF signal. By doing so, cable twisting problems can be prevented, the system can be applied in high-frequency bands, and low cost and high durability can be secured.

Inventors

• 남승구
• 최세환
• 홍석연
• 이보영

Assignees

• 한국전자기술연구원

Dates

Publication Date

20260507

Application Date

20241031

Claims (12)

1. A first RF coupler that transmits an RF signal input from an RF input terminal to a ground line; and An antenna measurement system using a non-contact RF coupler, comprising: a second RF coupler that is non-contact coupled to a first RF coupler to couple and acquire an RF signal transmitted to the first RF coupler, and transmits the acquired RF signal to an antenna for transmitting an RF signal.
2. In claim 1, The first RF coupler is, A first connecting member extending in the longitudinal direction and having one end connected to an RF input terminal; and An antenna measurement system using a non-contact RF coupler, characterized by including: a first coupling member having a circular cross-section, one side of which is physically connected to the other side of a first connecting member, and the other side of which is connected to a ground wire to transmit an RF signal transmitted through the first connecting member to the ground wire.
3. In claim 2, The second RF coupler is, A second coupling member having a circular cross-section and coupled non-contactually at a predetermined distance in the vertical direction from the first coupling member to the ground, thereby coupling an RF signal transmitted to the first coupling member to obtain a coupling signal of the RF signal; and An antenna measurement system using a non-contact RF coupler, characterized by including: a second connecting member that is formed to be extended in the longitudinal direction, wherein one end is physically connected to the other side of the second coupling member and the other side is connected to an antenna for transmitting an RF signal, thereby transmitting an RF signal obtained through the second coupling member to the antenna for transmitting an RF signal.
4. In claim 1, The first RF coupler is, A first transmission member that transmits an RF signal input from an RF input terminal to a ground line; and An antenna measurement system using a non-contact RF coupler, characterized by including: a first coupling member that is non-contactually coupled and spaced apart from a first transmission member by a predetermined distance in the horizontal direction of the ground, and which couples and acquires an RF signal transmitted to the first transmission member.
5. In claim 4, The first coupling member is, The cross-section is formed in a circular shape, The first transmission member is, An antenna measurement system using a non-contact RF coupler, characterized in that the cross-section of the portion non-contactually coupled to the first coupling member is formed as a curved surface having the same curvature as the outer circumference of the first coupling member.
6. In claim 4, The second RF coupler is, A second coupling member manufactured with the same size and shape as the first coupling member, but coupled non-contactually at a predetermined distance from the first coupling member in the direction perpendicular to the ground, thereby obtaining an RF signal obtained by coupling the first coupling member; and An antenna measurement system using a non-contact RF coupler comprising: a second transmission member, one end of which is connected to an RF signal transmitting antenna and the other end of which is connected to a ground wire, and which is non-contact coupled by being spaced apart from a second coupling member by a predetermined distance in the horizontal direction of the ground, so as to re-couple and obtain an RF signal obtained by coupling the second coupling member, and to transmit the obtained RF signal to an RF signal transmitting antenna.
7. In claim 6, The second coupling member is, The cross-section is formed in a circular shape, The second transmission member is, An antenna measurement system using a non-contact RF coupler, characterized in that the cross-section of the portion that is non-contactually coupled with the second coupling member is formed as a curved surface having the same curvature as the outer circumference of the second coupling member.
8. In claim 1, An antenna for transmitting RF signals is, An antenna measurement system using a non-contact RF coupler characterized by being mounted on the upper side of a rotating body having a circular cross-section so as to be rotatable.
9. In claim 1, An antenna measurement system using a non-contact RF coupler, further comprising a spacing adjustment unit that adjusts the spacing between the first RF coupler and the second RF coupler according to a communication quality indicator or frequency band.
10. A first RF coupler transmits an RF signal input from an RF input terminal to a ground line; and An antenna measurement method using a non-contact RF coupler, comprising the step of a second RF coupler coupled to a first RF coupler in a non-contact manner to couple and acquire the RF signal, and to transmit the acquired RF signal to an antenna for transmitting the RF signal.
11. A third RF coupler that transmits the RF signal received through an antenna for receiving RF signals to a ground line; and An antenna measurement system using a non-contact RF coupler comprising: a fourth RF coupler coupled non-contact with a third RF coupler to couple and acquire the RF signal, and transmitting the acquired RF signal to an RF output terminal.
12. A third RF coupler transmits an RF signal received through an RF signal receiving antenna to a ground line; and An antenna measurement method using a non-contact RF coupler, comprising the step of a fourth RF coupler coupled to a third RF coupler in a non-contact manner to couple and acquire the RF signal, and transmitting the acquired RF signal to an RF output terminal.

Description

System and method for antenna measurement using non-contact RF coupler The present invention relates to an antenna measurement system and method, and more specifically, to an antenna measurement system and method that applies a non-contact RF coupler to an antenna chamber. In conventional antenna measurement systems, as exemplified in Fig. 1, an antenna is mounted on a rotating disc and a flexible RF cable is connected to rotate it, but while this method is inexpensive, there is a problem where the cable gets twisted during rotation. And to solve this cable twisting problem, an RF rotary joint can be used as exemplified in Fig. 2, but in this case, although cable twisting can be prevented, there are limitations as the cost is very high and component failure may occur during long-term use. In particular, as the frequency increases, the price of RF rotary joints rises sharply, leading to a problem of declining economic feasibility. FIG. 1 is a diagram illustrating an antenna measurement system using a conventional flexible RF cable. FIG. 2 is a drawing illustrating a conventional RF rotary joint, FIG. 3 is a drawing provided for the description of the configuration of an antenna measurement system using a non-contact RF coupler according to a first embodiment of the present invention. FIG. 4 is a drawing provided for the description of the first coupling member and the second coupling member shown in FIG. 3. FIG. 5 is a drawing provided in the description of a rotating body on which the antenna shown in FIG. 3 is mounted. FIG. 6 is a drawing provided for the description of the configuration of an antenna measurement system using a non-contact RF coupler according to a second embodiment of the present invention. FIG. 7 is a drawing provided for the description of the configuration of an antenna measurement system using a non-contact RF coupler according to a third embodiment of the present invention, and FIG. 8 is a drawing provided to describe the configuration of an antenna measurement system using a non-contact RF coupler according to the fourth embodiment of the present invention. The present invention will be described in more detail below with reference to the drawings. To clearly explain the invention, parts unrelated to the description have been omitted from the drawings, and in the drawings, the width, length, thickness, etc., of the components may be exaggerated for convenience. An antenna measurement system using a non-contact RF coupler according to the present invention (hereinafter collectively referred to as the 'antenna measurement system') can be applied even in high frequency bands, secures low cost and high durability, and can transmit RF signals using a non-contact RF coupler to prevent twisting of the cable connected to the antenna when the antenna rotates. < 1. Antenna measurement system according to the first embodiment > FIG. 3 is a drawing provided for the description of the configuration of an antenna measurement system using a non-contact RF coupler according to a first embodiment of the present invention, FIG. 4 is a drawing provided for the description of the first coupling member (120) and the second coupling member (220) shown in FIG. 3, and FIG. 5 is a drawing provided for the description of the rotating body (20) on which the antenna shown in FIG. 3 is mounted. Hereinafter, an antenna measurement system according to the first embodiment of the present invention will be described with reference to FIGS. 3 to 5. Referring to FIG. 3, the antenna measurement system according to the first embodiment is an antenna (10) system for transmitting RF signals, and may include a first RF coupler (100) and a second RF coupler (200) capable of transmitting RF signals to each other while separated from each other using the principle of electromagnetic induction. The first RF coupler (100) can transmit an RF signal input from the RF input terminal to the ground line (40). And the second RF coupler (200) is coupled non-contactually with the first RF coupler (100) to couple and obtain an RF signal transmitted to the first RF coupler (100), and can transmit the obtained RF signal to an antenna (10) for transmitting RF signals. In summary, in the antenna measurement system according to the first embodiment, when the first RF coupler (100) transmits an RF signal input from the RF input terminal to the ground line (40), a second RF coupler (200) coupled non-contactually with the first RF coupler (100) can couple and acquire the RF signal and transmit the acquired RF signal to the RF signal transmitting antenna (10). To this end, the first RF coupler (100) may include a first connecting member (110) having one end connected to an RF input terminal and a first coupling member (120) that transmits an RF signal transmitted through the first connecting member (110) to a ground line (40). For example, the first connecting member (110) is formed to extend in the longitudinal direction, and one end may be co