CN-116191059-B - Parameter acquisition method for circular ring antenna array fed by constant-amplitude in-phase patch

CN116191059BCN 116191059 BCN116191059 BCN 116191059BCN-116191059-B

Abstract

The invention discloses a parameter acquisition method of a circular ring antenna array fed by a constant-amplitude in-phase patch, which comprises a metal ground plane and a plurality of antenna units which are arranged on the metal ground plane and are excited in a linear array and have constant amplitude in phase, wherein each common mode port comprises two single-port ports, the active common mode reflection coefficient of each common mode port of the antenna units is equal to half of the sum of the common mode reflection coefficients of the two single ports, the common mode reflection coefficient of the single port is calculated first, and the active common mode reflection coefficient of the common mode port is indirectly obtained.

Inventors

XU GUANGHUI
LU XIANLONG
WANG WEI
XU ZHENHUA
LI JINGFENG
LUO YANBIN
CHEN MING
ZHENG ZHI
ZHENG YUYANG

Assignees

安徽大学
中国电子科技集团公司第三十八研究所

Dates

Publication Date: 20260512
Application Date: 20230104

Claims (7)

1. A parameter acquisition method of a circular ring antenna array fed by equal-amplitude in-phase patches is characterized in that the antenna array comprises a metal ground plane and a plurality of equal-amplitude in-phase excited antenna units which are arranged on the metal ground plane and are arranged in a linear array mode, each antenna unit is provided with a common-mode port, each common-mode port comprises two single-end ports, the active common-mode reflection coefficient of each common-mode port of the antenna unit is equal to half of the sum of the common-mode reflection coefficients of the two single-end ports, the common-mode reflection coefficient of the single-end ports is calculated first to indirectly obtain the active common-mode reflection coefficient of the common-mode ports, each antenna unit comprises a circular radiating metal patch and two feeding metal patches, the two feeding metal patches are parallel to each other and distributed on the circular radiating metal patch and tangent to the inner diameter of the radiating metal patch in a overlooking view, each feeding metal patch is of an L-shaped structure with a long side and a short side which are vertically fixedly connected, a right-angle opening of the L-shaped structure faces a radiating surface of the radiating metal patch and the short side is vertically fixed on the radiating metal patch, the long side is suspended in a long side, the plane is overlooking, the active common-mode reflection coefficient of the common-mode of the single-mode port is obtained indirectly, the radiating metal patch is arranged on the radiating metal patch, and the antenna unit is tangent to the radiating antenna unit and the radiating antenna unit is tangent to the radiating antenna unit.
2. The method for obtaining parameters of a circular antenna array fed by a constant amplitude in-phase patch according to claim 1, wherein an S-parameter matrix of the circular antenna array is Wherein, the Is a common mode port A single port received differential input wave, Is a common mode port Is a differential transmission wave reflected outwards from the other single port of the pair, Is the common mode reflection coefficient from common mode port m to common mode port n and , Is a single port To a single port Is used for the diffusion of the light into the light source, Is a single port To a single port Is used for the diffusion of the light into the light source, Is a single port To a single port Is used for the diffusion of the light into the light source, Is a single port To a single port Scattering parameters of (a) are determined.
3. The method for obtaining parameters of a circular ring antenna array fed by a constant amplitude in-phase patch as claimed in claim 2, wherein the active common mode reflection coefficient of the circular ring antenna array is 。
4. The method for obtaining parameters of circular antenna array with constant amplitude and phase patch feeding as claimed in claim 3, wherein the active common mode reflection coefficient of common mode port of said antenna unit is equal to half of the sum of the common mode reflection coefficients of two single ports, and the deduction process is that 。
5. The method for obtaining parameters of a circular ring antenna array fed by a patch of constant amplitude and phase as set forth in claim 3, wherein the active common mode impedance of the circular ring antenna array is Wherein, the Representing the common mode characteristic impedance.
6. The method for obtaining parameters of a circular ring antenna array fed by a constant amplitude in-phase patch of claim 3, wherein the circular ring antenna array has an active common mode admittance of Wherein, the Representing the common mode characteristic admittance.
7. The method for obtaining parameters of a circular ring antenna array fed by a constant amplitude in-phase patch as claimed in claim 3, wherein the active common mode standing wave ratio of the circular ring antenna array is 。

Description

Parameter acquisition method for circular ring antenna array fed by constant-amplitude in-phase patch Technical Field The invention relates to the technical field of antenna arrays, in particular to a parameter acquisition method of a circular ring antenna array fed by a constant-amplitude in-phase patch. Background Currently, common mode antenna element theory and technology are widely applied to terminal equipment such as mobile phones and the like, and meanwhile, the common mode antenna element theory and technology are also paid attention to in academia. The circular ring antenna excited by the same amplitude and phase has the advantages of low cross polarization, high gain and the like. However, there is little theoretical research on antenna arrays excited in phase with equal amplitude, especially with respect to the calculation of active common mode impedance, admittance and standing wave ratio. The calculated active common mode reflection coefficient of the antenna unit can be used for judging the port matching degree under common mode excitation so as to judge whether the antenna meets the design requirement, so that the research on the active common mode reflection coefficient of the antenna unit gradually becomes an industry hot spot problem. The Chinese patent publication No. CN115548701A discloses a method for obtaining the active common mode reflection coefficient of a constant amplitude in-phase excitation loop antenna array, which is applied to an array antenna with common mode feed, wherein the array antenna comprises N antenna units which are arranged in a linear array, each antenna unit is fed by a corresponding common mode port, the common mode port of an mth antenna unit comprises a ma port and an mb port, and the active common mode reflection coefficient of the mth antenna unit isWherein S mana is a scattering parameter from single port ma to single port na, S mbnb is a scattering parameter from single port mb to single port nb, S manb is a scattering parameter from single port ma to single port nb, and S mbna is a scattering parameter from single port mb to single port na, wherein N is more than or equal to 1, and m is less than or equal to N. However, the patent is difficult to observe the tuning process of impedance matching, the relation between the active reflection coefficients of the common mode port and the separation port is not obtained, all scattering parameters of the common mode condition need to be calculated, the calculated amount is large, the time consumption is long, and the method is not beneficial to popularization in engineering practice. Disclosure of Invention The invention aims to solve the technical problems that the existing method for calculating the active common mode reflection coefficient is large in calculated amount, long in time consumption and unfavorable for popularization in engineering practice. The invention solves the technical problems by adopting the technical means that the parameter acquisition method of the circular ring antenna array for the equal-amplitude in-phase patch feed comprises a metal ground plane and a plurality of equal-amplitude in-phase excited antenna units which are arranged on the metal ground plane and are arranged in a linear array, wherein each antenna unit is provided with a common-mode port, each common-mode port comprises two single ports, the active common-mode reflection coefficient of the common-mode port of the antenna unit is equal to half of the sum of the common-mode reflection coefficients of the two single ports, and the active common-mode reflection coefficient of the common-mode port is obtained indirectly by calculating the common-mode reflection coefficient of the single ports. The method has the beneficial effects that the conclusion that the active common-mode reflection coefficient of the common-mode port of the antenna unit is equal to half of the sum of the common-mode reflection coefficients of the two single ports is given, the active reflection coefficient of the single port is calculated first, and the active common-mode reflection coefficient of the common-mode port is indirectly obtained, so that the calculation process is simplified, the calculated amount is small, the time consumption is relatively short, and the method is favorable for popularization and application in engineering practice. Further, the antenna unit comprises a circular radiating metal patch and two feeding metal patches, wherein the two feeding metal patches are mutually parallel and distributed on the circular radiating metal patch, and the two feeding metal patches are tangential to the inner diameter of the radiating metal patch in a overlooking view. Furthermore, the feeding metal patch is an L-shaped structure with a long side and a short side which are vertically and fixedly connected, a right-angle opening of the L-shaped structure faces a radiation surface of the radiation metal patch, the short side is vertically fi