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Phased array antenna system with two dimensional scanning

A technology of phased array antennas and two-dimensional arrays, which is applied to specific array feeding systems, antennas, antenna arrays, etc., and can solve the problems of not allowing scanning and directly scaling up in proportion

Inactive Publication Date: 2009-06-24
QINETIQ LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these cannot be scaled directly to two dimensions: for a two-dimensional array of antenna elements arranged in rows and columns, using one of these existing solutions per row or column allows scanning all rows or columns in one dimension, but does not allow scanning in another (orthogonal) dimension

Method used

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  • Phased array antenna system with two dimensional scanning
  • Phased array antenna system with two dimensional scanning
  • Phased array antenna system with two dimensional scanning

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Embodiment Construction

[0071] refer to figure 1 , schematically illustrated and generally indicated at 10, is a prior art phased array antenna scanning circuit. Circuit 10 is a generalized version of the equivalent disclosed in WO2004 / 102739. It has two inputs I connected to a variable delay or variable phase shifter 12 and a fixed delay or phase shifter 14 respectively 1 and I 2 , the aforementioned phase shifters are in turn respectively connected to output terminals 17 with 1 to 17 N Inputs A and B of the splitter and vector combiner unit 16. The splitter and vector combiner unit 16 is known in the field of phased array antennas as the common feed network of the antenna array. circuit 10 has an output terminal 17 which is connected to the respective 1 to 17 N Antenna Unit 18 1 to 18 N A one-dimensional antenna array 18 [1] composed of rows: where N represents the output terminal 17 1 etc. and the antenna unit 18 1 etc., and dashed lines 20 and 22 indicate that these outputs and antenna...

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Abstract

A phased array antenna system with two dimensional scanning includes a two dimensional array A of antenna elements A1,1 to A12,12 arranged in lines; each line is associated with a respective first rank corporate feed network 161 to 1612 having outputs 171,1 to 1712,12 connected to respective antenna elements A1,1 to A12,12 and inputs for variable relative phase input signals. These corporate feed networks each have first and second inputs A1 / B1 to A12 / B12 connected respectively to outputs 171 CD / 1712CD to 171EF / 1712EF of different second rank corporate feed networks 16CD and 16EF. The corporate feed networks 161 to 16EF convert input signals of variable relative phase into relatively greater numbers of output signals for a phased array. The system (30) includes a phase varying circuit 40 for varying phase differences between input signals to each second rank corporate feed network 16CD or 16EF and between input signals to different second rank corporate feed networks 16CD and 16EF to provide control of antenna beam direction in two dimensions.

Description

technical field [0001] The present invention relates to a phased array antenna system with two-dimensional scanning. The invention is suitable for use in all fields of technology employing scanning phased array antennas, such as radar, television and radio broadcasting and telecommunication, especially for mobile cellular radios ("mobile phones"). Background technique [0002] Phased array antennas are well known: the subject is discussed in detail in, for example, a standard textbook well known in the field of antennas, "Microwave Scanning Antennas", R.C. Hansen, Vol 3 Array Systems, Academic Press, NY, 1966. Such antennas include arrays of individual antenna elements (typically eight or more), such as dipoles or patches. The antenna has a radiation pattern comprising a main lobe or main beam and side lobes. The center of the main lobe is the direction of maximum sensitivity of the antenna in receive mode and the direction of the main output radiation beam of the antenna ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q3/36
CPCH01Q21/0006H01Q3/36H01Q21/061
Inventor P·E·哈斯克尔
Owner QINETIQ LTD