公开(公告)号：WO2003048697A1

公开(公告)日：2003-06-12

申请号：PCT/SE2002/002223

申请日：2002-12-04

Applicant: SAAB MARINE ELECTRONICS AB ,  WESTERLING, Jan ,  KRIG, Torbjörn

Inventor： WESTERLING, Jan ,  KRIG, Torbjörn

IPC: G01F23/284

CPC classification number: H01Q21/065 ,  G01F23/284

Abstract: Radar antenna (1) for the transmission and reception of radar waves (4) for measuring the level of a surface of a liquid enclosed in a tank, wherein the radar antenna (1) is arranged above the surface (3a) of the liquid and substantially directed downwards towards said surface and said level determined by evaluation of the time lapsed between the transmission and reception of a signal included in said radar waves and wherein said radar antenna (1) has a front surface (1a) for transmission and reception of said radar waves, wherein said surface (1a) of the antenna, wherein said sheet has a sheet surface (1b) between said antenna front surface (1a) and the surface (3a) of the liquid and said sheet surface (1b) being arranged in a predetermined angle α being greater than 0° in relation to the horizontal plane H, whereby a fluid occurring on the surface (1b) of the sheet is drained off by means of gravity.

Abstract translation: 用于发射和接收雷达波的雷达天线（1），用于测量封闭在罐中的液体的表面的水平，其中雷达天线（1）布置在液体的表面（3a）的上方， 基本上朝向所述表面指向并且通过评估包含在所述雷达波中的信号的发送和接收之间经过的时间确定的所述水平，并且其中所述雷达天线（1）具有用于发送和接收所述雷达波形的前表面（1a） 雷达波，其中所述天线的所述表面（1a），其中所述片材在所述天线前表面（1a）和所述液体的表面（3a）之间具有片表面（1b），所述片材表面（1b）布置在 预定角度α相对于水平面H大于0°，由此通过重力排出在片材表面（1b）上发生的流体。

公开(公告)号：WO2003042639A1

公开(公告)日：2003-05-22

申请号：PCT/SE2002/002081

申请日：2002-11-14

Applicant: SAAB MARINE ELECTRONICS AB ,  WESTERLING, Jan ,  KRIG, Torbjörn

Inventor： WESTERLING, Jan ,  KRIG, Torbjörn

IPC: G01F23/284

CPC classification number: H01Q1/225 ,  G01F23/284 ,  H01Q1/22 ,  H01Q13/12 ,  H01Q13/22

Abstract: An antenna (10) in a radar level gauge for determining the level of the surface (6) of a medium (2) stored in a tank (1). The antenna (10) has a first (11) and a second (13) electrically conductive layer, and between the conductive layers (11, 13) a dielectric layer (12). The second (13) of the conductive layers is provided with a number of holes (14) in a predetermined pattern. Leading to the centre of the dielectric layer (12) is a transmission line (15). The microwaves from a radar unit (3) in the radar level gauge are supplied to the dielectric layer (12) in the antenna (10) via the transmission line (15) and transmitted out in a radial direction from a feed point in the dielectric layer that acts as a waveguide. Via said holes (14) in the second conductive layer (13) a microwave beam radiates out. Due to matching of the phase of the microwave and the placing of the individual holes (14) in the pattern that the holes form, a predominant waveguide mode of the desired order is obtained.

Abstract translation: 雷达液位计中的天线（10），用于确定存储在储罐（1）中的介质（2）的表面（6）的水平。 天线（10）具有第一（11）和第二（13）导电层，并且在导电层（11,13）之间具有介电层（12）。 导电层的第二（13）以预定图案设置有多个孔（14）。 导电介质层（12）的中心是传输线（15）。 来自雷达液位计的雷达单元（3）的微波通过传输线（15）被提供给天线（10）中的电介质层（12），并从电介质的馈电点 作为波导的层。 通过第二导电层（13）中的所述孔（14），微波辐射出。 由于微波的相位匹配和孔形成的图案中的各个孔（14）的放置，获得了所需顺序的主要波导模式。