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Goniometer antenna system and use method thereof

An antenna system, direction-finding antenna technology, used in radio wave measurement systems, antennas, resonant antennas, etc.

Active Publication Date: 2009-09-23
HONG KONG APPLIED SCI & TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, there are no compact DF antenna systems on the market that can unambiguously indicate the azimuth direction of a transmitter

Method used

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  • Goniometer antenna system and use method thereof
  • Goniometer antenna system and use method thereof
  • Goniometer antenna system and use method thereof

Examples

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Embodiment Construction

[0023] figure 1 A typical antenna system 100 for one embodiment of the invention is described. Antenna system 100 includes two antenna elements 102 and 103 . Between the antenna elements 102 and 103 is a parasitic element 104 and a switch 105 is used to select the signal from one antenna element 102 / 103 at a time. In this particular example, the various components are arranged on PCB 101, which also has a ground plane on a lower layer, the outline of which is shown by the dashed lines in the figure. The parasitic element 104 is arranged to provide an RF trap on the antenna 103 so as to establish a null on the directional line between the parasitic element and the antenna 103 .

[0024] System 100 also includes RF module 106 , which is connected to switch 105 to receive signals from antennas 102 and 103 . In this embodiment, the RF module 106 has a control circuit to operate the switch 105 to switch between receiving signals from the antenna 102 and the antenna 103 . A swit...

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PUM

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Abstract

An antenna system includes a first antenna element, a second antenna element and a parasitic element, wherein, the parasitic element is arranged related to the first antenna element and the second antenna element so that the maximum gaindifference between each antenna field of the first and second antenna elements takes place at a zero position of the first antenna element field type.

Description

technical field [0001] The present invention relates to a direction-finding antenna system, in particular to a direction-finding antenna system employing multiple antennas. Background of the invention [0002] Antenna systems come in a variety of forms. Currently popular are printed circuit board (PCB) based systems. For example, a PCB patch antenna consists of a radiating section on one layer of the PCB and a ground plane on another layer above or below the radiating section (where "above" and "below" refer to layers within the stackup). s position). Since the radiating part of the patch antenna utilizes the ground plane, it is called a grounded antenna. Other antenna elements are not above or below the ground plane and are called ungrounded antennas. A planar inverted-F antenna (PIFA) can be made from a few patch antennas by shorting one end of the patch element to ground. In order to change the pattern and / or add frequency bands to the antenna's operating spectrum, m...

Claims

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Application Information

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IPC IPC(8): H01Q21/00H01Q21/29G01S3/02
CPCG01S3/28H01Q21/29H01Q9/42G01S3/043G01S3/046G01S3/18G01S3/40
Inventor 麦志强柳江平麦志伦
Owner HONG KONG APPLIED SCI & TECH RES INST
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